871 lines
23 KiB
C
871 lines
23 KiB
C
/*
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* file for managing the edac_device subsystem of devices for EDAC
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*
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* (C) 2007 SoftwareBitMaker
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*
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* This file may be distributed under the terms of the
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* GNU General Public License.
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*
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* Written Doug Thompson <norsk5@xmission.com>
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*
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*/
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#include <linux/ctype.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/edac.h>
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#include "edac_core.h"
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#include "edac_module.h"
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#define EDAC_DEVICE_SYMLINK "device"
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#define to_edacdev(k) container_of(k, struct edac_device_ctl_info, kobj)
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#define to_edacdev_attr(a) container_of(a, struct edacdev_attribute, attr)
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/*
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* Set of edac_device_ctl_info attribute store/show functions
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*/
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/* 'log_ue' */
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static ssize_t edac_device_ctl_log_ue_show(struct edac_device_ctl_info
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*ctl_info, char *data)
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{
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return sprintf(data, "%u\n", ctl_info->log_ue);
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}
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static ssize_t edac_device_ctl_log_ue_store(struct edac_device_ctl_info
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*ctl_info, const char *data,
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size_t count)
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{
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/* if parameter is zero, turn off flag, if non-zero turn on flag */
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ctl_info->log_ue = (simple_strtoul(data, NULL, 0) != 0);
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return count;
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}
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/* 'log_ce' */
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static ssize_t edac_device_ctl_log_ce_show(struct edac_device_ctl_info
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*ctl_info, char *data)
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{
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return sprintf(data, "%u\n", ctl_info->log_ce);
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}
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static ssize_t edac_device_ctl_log_ce_store(struct edac_device_ctl_info
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*ctl_info, const char *data,
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size_t count)
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{
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/* if parameter is zero, turn off flag, if non-zero turn on flag */
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ctl_info->log_ce = (simple_strtoul(data, NULL, 0) != 0);
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return count;
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}
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/* 'panic_on_ue' */
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static ssize_t edac_device_ctl_panic_on_ue_show(struct edac_device_ctl_info
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*ctl_info, char *data)
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{
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return sprintf(data, "%u\n", ctl_info->panic_on_ue);
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}
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static ssize_t edac_device_ctl_panic_on_ue_store(struct edac_device_ctl_info
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*ctl_info, const char *data,
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size_t count)
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{
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/* if parameter is zero, turn off flag, if non-zero turn on flag */
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ctl_info->panic_on_ue = (simple_strtoul(data, NULL, 0) != 0);
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return count;
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}
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/* 'poll_msec' show and store functions*/
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static ssize_t edac_device_ctl_poll_msec_show(struct edac_device_ctl_info
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*ctl_info, char *data)
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{
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return sprintf(data, "%u\n", ctl_info->poll_msec);
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}
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static ssize_t edac_device_ctl_poll_msec_store(struct edac_device_ctl_info
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*ctl_info, const char *data,
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size_t count)
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{
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unsigned long value;
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/* get the value and enforce that it is non-zero, must be at least
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* one millisecond for the delay period, between scans
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* Then cancel last outstanding delay for the work request
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* and set a new one.
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*/
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value = simple_strtoul(data, NULL, 0);
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edac_device_reset_delay_period(ctl_info, value);
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return count;
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}
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/* edac_device_ctl_info specific attribute structure */
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struct ctl_info_attribute {
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struct attribute attr;
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ssize_t(*show) (struct edac_device_ctl_info *, char *);
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ssize_t(*store) (struct edac_device_ctl_info *, const char *, size_t);
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};
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#define to_ctl_info(k) container_of(k, struct edac_device_ctl_info, kobj)
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#define to_ctl_info_attr(a) container_of(a,struct ctl_info_attribute,attr)
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/* Function to 'show' fields from the edac_dev 'ctl_info' structure */
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static ssize_t edac_dev_ctl_info_show(struct kobject *kobj,
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struct attribute *attr, char *buffer)
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{
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struct edac_device_ctl_info *edac_dev = to_ctl_info(kobj);
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struct ctl_info_attribute *ctl_info_attr = to_ctl_info_attr(attr);
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if (ctl_info_attr->show)
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return ctl_info_attr->show(edac_dev, buffer);
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return -EIO;
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}
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/* Function to 'store' fields into the edac_dev 'ctl_info' structure */
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static ssize_t edac_dev_ctl_info_store(struct kobject *kobj,
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struct attribute *attr,
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const char *buffer, size_t count)
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{
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struct edac_device_ctl_info *edac_dev = to_ctl_info(kobj);
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struct ctl_info_attribute *ctl_info_attr = to_ctl_info_attr(attr);
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if (ctl_info_attr->store)
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return ctl_info_attr->store(edac_dev, buffer, count);
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return -EIO;
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}
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/* edac_dev file operations for an 'ctl_info' */
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static const struct sysfs_ops device_ctl_info_ops = {
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.show = edac_dev_ctl_info_show,
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.store = edac_dev_ctl_info_store
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};
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#define CTL_INFO_ATTR(_name,_mode,_show,_store) \
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static struct ctl_info_attribute attr_ctl_info_##_name = { \
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.attr = {.name = __stringify(_name), .mode = _mode }, \
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.show = _show, \
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.store = _store, \
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};
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/* Declare the various ctl_info attributes here and their respective ops */
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CTL_INFO_ATTR(log_ue, S_IRUGO | S_IWUSR,
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edac_device_ctl_log_ue_show, edac_device_ctl_log_ue_store);
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CTL_INFO_ATTR(log_ce, S_IRUGO | S_IWUSR,
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edac_device_ctl_log_ce_show, edac_device_ctl_log_ce_store);
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CTL_INFO_ATTR(panic_on_ue, S_IRUGO | S_IWUSR,
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edac_device_ctl_panic_on_ue_show,
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edac_device_ctl_panic_on_ue_store);
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CTL_INFO_ATTR(poll_msec, S_IRUGO | S_IWUSR,
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edac_device_ctl_poll_msec_show, edac_device_ctl_poll_msec_store);
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/* Base Attributes of the EDAC_DEVICE ECC object */
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static struct ctl_info_attribute *device_ctrl_attr[] = {
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&attr_ctl_info_panic_on_ue,
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&attr_ctl_info_log_ue,
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&attr_ctl_info_log_ce,
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&attr_ctl_info_poll_msec,
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NULL,
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};
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/*
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* edac_device_ctrl_master_release
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*
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* called when the reference count for the 'main' kobj
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* for a edac_device control struct reaches zero
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*
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* Reference count model:
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* One 'main' kobject for each control structure allocated.
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* That main kobj is initially set to one AND
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* the reference count for the EDAC 'core' module is
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* bumped by one, thus added 'keep in memory' dependency.
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*
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* Each new internal kobj (in instances and blocks) then
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* bumps the 'main' kobject.
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*
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* When they are released their release functions decrement
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* the 'main' kobj.
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*
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* When the main kobj reaches zero (0) then THIS function
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* is called which then decrements the EDAC 'core' module.
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* When the module reference count reaches zero then the
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* module no longer has dependency on keeping the release
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* function code in memory and module can be unloaded.
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*
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* This will support several control objects as well, each
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* with its own 'main' kobj.
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*/
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static void edac_device_ctrl_master_release(struct kobject *kobj)
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{
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struct edac_device_ctl_info *edac_dev = to_edacdev(kobj);
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edac_dbg(4, "control index=%d\n", edac_dev->dev_idx);
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/* decrement the EDAC CORE module ref count */
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module_put(edac_dev->owner);
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/* free the control struct containing the 'main' kobj
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* passed in to this routine
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*/
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kfree(edac_dev);
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}
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/* ktype for the main (master) kobject */
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static struct kobj_type ktype_device_ctrl = {
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.release = edac_device_ctrl_master_release,
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.sysfs_ops = &device_ctl_info_ops,
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.default_attrs = (struct attribute **)device_ctrl_attr,
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};
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/*
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* edac_device_register_sysfs_main_kobj
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*
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* perform the high level setup for the new edac_device instance
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*
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* Return: 0 SUCCESS
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* !0 FAILURE
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*/
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int edac_device_register_sysfs_main_kobj(struct edac_device_ctl_info *edac_dev)
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{
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struct bus_type *edac_subsys;
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int err;
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edac_dbg(1, "\n");
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/* get the /sys/devices/system/edac reference */
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edac_subsys = edac_get_sysfs_subsys();
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/* Point to the 'edac_subsys' this instance 'reports' to */
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edac_dev->edac_subsys = edac_subsys;
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/* Init the devices's kobject */
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memset(&edac_dev->kobj, 0, sizeof(struct kobject));
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/* Record which module 'owns' this control structure
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* and bump the ref count of the module
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*/
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edac_dev->owner = THIS_MODULE;
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if (!try_module_get(edac_dev->owner)) {
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err = -ENODEV;
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goto err_out;
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}
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/* register */
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err = kobject_init_and_add(&edac_dev->kobj, &ktype_device_ctrl,
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&edac_subsys->dev_root->kobj,
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"%s", edac_dev->name);
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if (err) {
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edac_dbg(1, "Failed to register '.../edac/%s'\n",
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edac_dev->name);
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goto err_kobj_reg;
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}
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kobject_uevent(&edac_dev->kobj, KOBJ_ADD);
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/* At this point, to 'free' the control struct,
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* edac_device_unregister_sysfs_main_kobj() must be used
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*/
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edac_dbg(4, "Registered '.../edac/%s' kobject\n", edac_dev->name);
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return 0;
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/* Error exit stack */
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err_kobj_reg:
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module_put(edac_dev->owner);
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err_out:
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return err;
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}
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/*
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* edac_device_unregister_sysfs_main_kobj:
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* the '..../edac/<name>' kobject
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*/
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void edac_device_unregister_sysfs_main_kobj(struct edac_device_ctl_info *dev)
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{
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edac_dbg(0, "\n");
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edac_dbg(4, "name of kobject is: %s\n", kobject_name(&dev->kobj));
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/*
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* Unregister the edac device's kobject and
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* allow for reference count to reach 0 at which point
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* the callback will be called to:
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* a) module_put() this module
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* b) 'kfree' the memory
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*/
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kobject_put(&dev->kobj);
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}
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/* edac_dev -> instance information */
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/*
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* Set of low-level instance attribute show functions
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*/
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static ssize_t instance_ue_count_show(struct edac_device_instance *instance,
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char *data)
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{
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return sprintf(data, "%u\n", instance->counters.ue_count);
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}
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static ssize_t instance_ce_count_show(struct edac_device_instance *instance,
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char *data)
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{
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return sprintf(data, "%u\n", instance->counters.ce_count);
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}
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#define to_instance(k) container_of(k, struct edac_device_instance, kobj)
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#define to_instance_attr(a) container_of(a,struct instance_attribute,attr)
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/* DEVICE instance kobject release() function */
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static void edac_device_ctrl_instance_release(struct kobject *kobj)
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{
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struct edac_device_instance *instance;
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edac_dbg(1, "\n");
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/* map from this kobj to the main control struct
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* and then dec the main kobj count
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*/
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instance = to_instance(kobj);
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kobject_put(&instance->ctl->kobj);
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}
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/* instance specific attribute structure */
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struct instance_attribute {
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struct attribute attr;
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ssize_t(*show) (struct edac_device_instance *, char *);
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ssize_t(*store) (struct edac_device_instance *, const char *, size_t);
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};
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/* Function to 'show' fields from the edac_dev 'instance' structure */
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static ssize_t edac_dev_instance_show(struct kobject *kobj,
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struct attribute *attr, char *buffer)
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{
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struct edac_device_instance *instance = to_instance(kobj);
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struct instance_attribute *instance_attr = to_instance_attr(attr);
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if (instance_attr->show)
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return instance_attr->show(instance, buffer);
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return -EIO;
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}
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/* Function to 'store' fields into the edac_dev 'instance' structure */
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static ssize_t edac_dev_instance_store(struct kobject *kobj,
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struct attribute *attr,
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const char *buffer, size_t count)
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{
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struct edac_device_instance *instance = to_instance(kobj);
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struct instance_attribute *instance_attr = to_instance_attr(attr);
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if (instance_attr->store)
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return instance_attr->store(instance, buffer, count);
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return -EIO;
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}
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/* edac_dev file operations for an 'instance' */
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static const struct sysfs_ops device_instance_ops = {
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.show = edac_dev_instance_show,
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.store = edac_dev_instance_store
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};
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#define INSTANCE_ATTR(_name,_mode,_show,_store) \
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static struct instance_attribute attr_instance_##_name = { \
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.attr = {.name = __stringify(_name), .mode = _mode }, \
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.show = _show, \
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.store = _store, \
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};
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/*
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* Define attributes visible for the edac_device instance object
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* Each contains a pointer to a show and an optional set
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* function pointer that does the low level output/input
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*/
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INSTANCE_ATTR(ce_count, S_IRUGO, instance_ce_count_show, NULL);
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INSTANCE_ATTR(ue_count, S_IRUGO, instance_ue_count_show, NULL);
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/* list of edac_dev 'instance' attributes */
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static struct instance_attribute *device_instance_attr[] = {
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&attr_instance_ce_count,
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&attr_instance_ue_count,
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NULL,
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};
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/* The 'ktype' for each edac_dev 'instance' */
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static struct kobj_type ktype_instance_ctrl = {
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.release = edac_device_ctrl_instance_release,
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.sysfs_ops = &device_instance_ops,
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.default_attrs = (struct attribute **)device_instance_attr,
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};
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/* edac_dev -> instance -> block information */
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#define to_block(k) container_of(k, struct edac_device_block, kobj)
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#define to_block_attr(a) \
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container_of(a, struct edac_dev_sysfs_block_attribute, attr)
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/*
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* Set of low-level block attribute show functions
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*/
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static ssize_t block_ue_count_show(struct kobject *kobj,
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struct attribute *attr, char *data)
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{
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struct edac_device_block *block = to_block(kobj);
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return sprintf(data, "%u\n", block->counters.ue_count);
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}
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static ssize_t block_ce_count_show(struct kobject *kobj,
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struct attribute *attr, char *data)
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{
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struct edac_device_block *block = to_block(kobj);
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return sprintf(data, "%u\n", block->counters.ce_count);
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}
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/* DEVICE block kobject release() function */
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static void edac_device_ctrl_block_release(struct kobject *kobj)
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{
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struct edac_device_block *block;
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edac_dbg(1, "\n");
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/* get the container of the kobj */
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block = to_block(kobj);
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/* map from 'block kobj' to 'block->instance->controller->main_kobj'
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* now 'release' the block kobject
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*/
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kobject_put(&block->instance->ctl->kobj);
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}
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/* Function to 'show' fields from the edac_dev 'block' structure */
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static ssize_t edac_dev_block_show(struct kobject *kobj,
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struct attribute *attr, char *buffer)
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{
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struct edac_dev_sysfs_block_attribute *block_attr =
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to_block_attr(attr);
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if (block_attr->show)
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return block_attr->show(kobj, attr, buffer);
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return -EIO;
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}
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/* Function to 'store' fields into the edac_dev 'block' structure */
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static ssize_t edac_dev_block_store(struct kobject *kobj,
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struct attribute *attr,
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const char *buffer, size_t count)
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{
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struct edac_dev_sysfs_block_attribute *block_attr;
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block_attr = to_block_attr(attr);
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if (block_attr->store)
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return block_attr->store(kobj, attr, buffer, count);
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return -EIO;
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}
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/* edac_dev file operations for a 'block' */
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static const struct sysfs_ops device_block_ops = {
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.show = edac_dev_block_show,
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.store = edac_dev_block_store
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};
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#define BLOCK_ATTR(_name,_mode,_show,_store) \
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static struct edac_dev_sysfs_block_attribute attr_block_##_name = { \
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.attr = {.name = __stringify(_name), .mode = _mode }, \
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.show = _show, \
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.store = _store, \
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};
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BLOCK_ATTR(ce_count, S_IRUGO, block_ce_count_show, NULL);
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BLOCK_ATTR(ue_count, S_IRUGO, block_ue_count_show, NULL);
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/* list of edac_dev 'block' attributes */
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static struct edac_dev_sysfs_block_attribute *device_block_attr[] = {
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&attr_block_ce_count,
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&attr_block_ue_count,
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NULL,
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|
};
|
|
|
|
/* The 'ktype' for each edac_dev 'block' */
|
|
static struct kobj_type ktype_block_ctrl = {
|
|
.release = edac_device_ctrl_block_release,
|
|
.sysfs_ops = &device_block_ops,
|
|
.default_attrs = (struct attribute **)device_block_attr,
|
|
};
|
|
|
|
/* block ctor/dtor code */
|
|
|
|
/*
|
|
* edac_device_create_block
|
|
*/
|
|
static int edac_device_create_block(struct edac_device_ctl_info *edac_dev,
|
|
struct edac_device_instance *instance,
|
|
struct edac_device_block *block)
|
|
{
|
|
int i;
|
|
int err;
|
|
struct edac_dev_sysfs_block_attribute *sysfs_attrib;
|
|
struct kobject *main_kobj;
|
|
|
|
edac_dbg(4, "Instance '%s' inst_p=%p block '%s' block_p=%p\n",
|
|
instance->name, instance, block->name, block);
|
|
edac_dbg(4, "block kobj=%p block kobj->parent=%p\n",
|
|
&block->kobj, &block->kobj.parent);
|
|
|
|
/* init this block's kobject */
|
|
memset(&block->kobj, 0, sizeof(struct kobject));
|
|
|
|
/* bump the main kobject's reference count for this controller
|
|
* and this instance is dependent on the main
|
|
*/
|
|
main_kobj = kobject_get(&edac_dev->kobj);
|
|
if (!main_kobj) {
|
|
err = -ENODEV;
|
|
goto err_out;
|
|
}
|
|
|
|
/* Add this block's kobject */
|
|
err = kobject_init_and_add(&block->kobj, &ktype_block_ctrl,
|
|
&instance->kobj,
|
|
"%s", block->name);
|
|
if (err) {
|
|
edac_dbg(1, "Failed to register instance '%s'\n", block->name);
|
|
kobject_put(main_kobj);
|
|
err = -ENODEV;
|
|
goto err_out;
|
|
}
|
|
|
|
/* If there are driver level block attributes, then added them
|
|
* to the block kobject
|
|
*/
|
|
sysfs_attrib = block->block_attributes;
|
|
if (sysfs_attrib && block->nr_attribs) {
|
|
for (i = 0; i < block->nr_attribs; i++, sysfs_attrib++) {
|
|
|
|
edac_dbg(4, "creating block attrib='%s' attrib->%p to kobj=%p\n",
|
|
sysfs_attrib->attr.name,
|
|
sysfs_attrib, &block->kobj);
|
|
|
|
/* Create each block_attribute file */
|
|
err = sysfs_create_file(&block->kobj,
|
|
&sysfs_attrib->attr);
|
|
if (err)
|
|
goto err_on_attrib;
|
|
}
|
|
}
|
|
kobject_uevent(&block->kobj, KOBJ_ADD);
|
|
|
|
return 0;
|
|
|
|
/* Error unwind stack */
|
|
err_on_attrib:
|
|
kobject_put(&block->kobj);
|
|
|
|
err_out:
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* edac_device_delete_block(edac_dev,block);
|
|
*/
|
|
static void edac_device_delete_block(struct edac_device_ctl_info *edac_dev,
|
|
struct edac_device_block *block)
|
|
{
|
|
struct edac_dev_sysfs_block_attribute *sysfs_attrib;
|
|
int i;
|
|
|
|
/* if this block has 'attributes' then we need to iterate over the list
|
|
* and 'remove' the attributes on this block
|
|
*/
|
|
sysfs_attrib = block->block_attributes;
|
|
if (sysfs_attrib && block->nr_attribs) {
|
|
for (i = 0; i < block->nr_attribs; i++, sysfs_attrib++) {
|
|
|
|
/* remove each block_attrib file */
|
|
sysfs_remove_file(&block->kobj,
|
|
(struct attribute *) sysfs_attrib);
|
|
}
|
|
}
|
|
|
|
/* unregister this block's kobject, SEE:
|
|
* edac_device_ctrl_block_release() callback operation
|
|
*/
|
|
kobject_put(&block->kobj);
|
|
}
|
|
|
|
/* instance ctor/dtor code */
|
|
|
|
/*
|
|
* edac_device_create_instance
|
|
* create just one instance of an edac_device 'instance'
|
|
*/
|
|
static int edac_device_create_instance(struct edac_device_ctl_info *edac_dev,
|
|
int idx)
|
|
{
|
|
int i, j;
|
|
int err;
|
|
struct edac_device_instance *instance;
|
|
struct kobject *main_kobj;
|
|
|
|
instance = &edac_dev->instances[idx];
|
|
|
|
/* Init the instance's kobject */
|
|
memset(&instance->kobj, 0, sizeof(struct kobject));
|
|
|
|
instance->ctl = edac_dev;
|
|
|
|
/* bump the main kobject's reference count for this controller
|
|
* and this instance is dependent on the main
|
|
*/
|
|
main_kobj = kobject_get(&edac_dev->kobj);
|
|
if (!main_kobj) {
|
|
err = -ENODEV;
|
|
goto err_out;
|
|
}
|
|
|
|
/* Formally register this instance's kobject under the edac_device */
|
|
err = kobject_init_and_add(&instance->kobj, &ktype_instance_ctrl,
|
|
&edac_dev->kobj, "%s", instance->name);
|
|
if (err != 0) {
|
|
edac_dbg(2, "Failed to register instance '%s'\n",
|
|
instance->name);
|
|
kobject_put(main_kobj);
|
|
goto err_out;
|
|
}
|
|
|
|
edac_dbg(4, "now register '%d' blocks for instance %d\n",
|
|
instance->nr_blocks, idx);
|
|
|
|
/* register all blocks of this instance */
|
|
for (i = 0; i < instance->nr_blocks; i++) {
|
|
err = edac_device_create_block(edac_dev, instance,
|
|
&instance->blocks[i]);
|
|
if (err) {
|
|
/* If any fail, remove all previous ones */
|
|
for (j = 0; j < i; j++)
|
|
edac_device_delete_block(edac_dev,
|
|
&instance->blocks[j]);
|
|
goto err_release_instance_kobj;
|
|
}
|
|
}
|
|
kobject_uevent(&instance->kobj, KOBJ_ADD);
|
|
|
|
edac_dbg(4, "Registered instance %d '%s' kobject\n",
|
|
idx, instance->name);
|
|
|
|
return 0;
|
|
|
|
/* error unwind stack */
|
|
err_release_instance_kobj:
|
|
kobject_put(&instance->kobj);
|
|
|
|
err_out:
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* edac_device_remove_instance
|
|
* remove an edac_device instance
|
|
*/
|
|
static void edac_device_delete_instance(struct edac_device_ctl_info *edac_dev,
|
|
int idx)
|
|
{
|
|
struct edac_device_instance *instance;
|
|
int i;
|
|
|
|
instance = &edac_dev->instances[idx];
|
|
|
|
/* unregister all blocks in this instance */
|
|
for (i = 0; i < instance->nr_blocks; i++)
|
|
edac_device_delete_block(edac_dev, &instance->blocks[i]);
|
|
|
|
/* unregister this instance's kobject, SEE:
|
|
* edac_device_ctrl_instance_release() for callback operation
|
|
*/
|
|
kobject_put(&instance->kobj);
|
|
}
|
|
|
|
/*
|
|
* edac_device_create_instances
|
|
* create the first level of 'instances' for this device
|
|
* (ie 'cache' might have 'cache0', 'cache1', 'cache2', etc
|
|
*/
|
|
static int edac_device_create_instances(struct edac_device_ctl_info *edac_dev)
|
|
{
|
|
int i, j;
|
|
int err;
|
|
|
|
edac_dbg(0, "\n");
|
|
|
|
/* iterate over creation of the instances */
|
|
for (i = 0; i < edac_dev->nr_instances; i++) {
|
|
err = edac_device_create_instance(edac_dev, i);
|
|
if (err) {
|
|
/* unwind previous instances on error */
|
|
for (j = 0; j < i; j++)
|
|
edac_device_delete_instance(edac_dev, j);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* edac_device_delete_instances(edac_dev);
|
|
* unregister all the kobjects of the instances
|
|
*/
|
|
static void edac_device_delete_instances(struct edac_device_ctl_info *edac_dev)
|
|
{
|
|
int i;
|
|
|
|
/* iterate over creation of the instances */
|
|
for (i = 0; i < edac_dev->nr_instances; i++)
|
|
edac_device_delete_instance(edac_dev, i);
|
|
}
|
|
|
|
/* edac_dev sysfs ctor/dtor code */
|
|
|
|
/*
|
|
* edac_device_add_main_sysfs_attributes
|
|
* add some attributes to this instance's main kobject
|
|
*/
|
|
static int edac_device_add_main_sysfs_attributes(
|
|
struct edac_device_ctl_info *edac_dev)
|
|
{
|
|
struct edac_dev_sysfs_attribute *sysfs_attrib;
|
|
int err = 0;
|
|
|
|
sysfs_attrib = edac_dev->sysfs_attributes;
|
|
if (sysfs_attrib) {
|
|
/* iterate over the array and create an attribute for each
|
|
* entry in the list
|
|
*/
|
|
while (sysfs_attrib->attr.name != NULL) {
|
|
err = sysfs_create_file(&edac_dev->kobj,
|
|
(struct attribute*) sysfs_attrib);
|
|
if (err)
|
|
goto err_out;
|
|
|
|
sysfs_attrib++;
|
|
}
|
|
}
|
|
|
|
err_out:
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* edac_device_remove_main_sysfs_attributes
|
|
* remove any attributes to this instance's main kobject
|
|
*/
|
|
static void edac_device_remove_main_sysfs_attributes(
|
|
struct edac_device_ctl_info *edac_dev)
|
|
{
|
|
struct edac_dev_sysfs_attribute *sysfs_attrib;
|
|
|
|
/* if there are main attributes, defined, remove them. First,
|
|
* point to the start of the array and iterate over it
|
|
* removing each attribute listed from this device's instance's kobject
|
|
*/
|
|
sysfs_attrib = edac_dev->sysfs_attributes;
|
|
if (sysfs_attrib) {
|
|
while (sysfs_attrib->attr.name != NULL) {
|
|
sysfs_remove_file(&edac_dev->kobj,
|
|
(struct attribute *) sysfs_attrib);
|
|
sysfs_attrib++;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* edac_device_create_sysfs() Constructor
|
|
*
|
|
* accept a created edac_device control structure
|
|
* and 'export' it to sysfs. The 'main' kobj should already have been
|
|
* created. 'instance' and 'block' kobjects should be registered
|
|
* along with any 'block' attributes from the low driver. In addition,
|
|
* the main attributes (if any) are connected to the main kobject of
|
|
* the control structure.
|
|
*
|
|
* Return:
|
|
* 0 Success
|
|
* !0 Failure
|
|
*/
|
|
int edac_device_create_sysfs(struct edac_device_ctl_info *edac_dev)
|
|
{
|
|
int err;
|
|
struct kobject *edac_kobj = &edac_dev->kobj;
|
|
|
|
edac_dbg(0, "idx=%d\n", edac_dev->dev_idx);
|
|
|
|
/* go create any main attributes callers wants */
|
|
err = edac_device_add_main_sysfs_attributes(edac_dev);
|
|
if (err) {
|
|
edac_dbg(0, "failed to add sysfs attribs\n");
|
|
goto err_out;
|
|
}
|
|
|
|
/* create a symlink from the edac device
|
|
* to the platform 'device' being used for this
|
|
*/
|
|
err = sysfs_create_link(edac_kobj,
|
|
&edac_dev->dev->kobj, EDAC_DEVICE_SYMLINK);
|
|
if (err) {
|
|
edac_dbg(0, "sysfs_create_link() returned err= %d\n", err);
|
|
goto err_remove_main_attribs;
|
|
}
|
|
|
|
/* Create the first level instance directories
|
|
* In turn, the nested blocks beneath the instances will
|
|
* be registered as well
|
|
*/
|
|
err = edac_device_create_instances(edac_dev);
|
|
if (err) {
|
|
edac_dbg(0, "edac_device_create_instances() returned err= %d\n",
|
|
err);
|
|
goto err_remove_link;
|
|
}
|
|
|
|
|
|
edac_dbg(4, "create-instances done, idx=%d\n", edac_dev->dev_idx);
|
|
|
|
return 0;
|
|
|
|
/* Error unwind stack */
|
|
err_remove_link:
|
|
/* remove the sym link */
|
|
sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK);
|
|
|
|
err_remove_main_attribs:
|
|
edac_device_remove_main_sysfs_attributes(edac_dev);
|
|
|
|
err_out:
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* edac_device_remove_sysfs() destructor
|
|
*
|
|
* given an edac_device struct, tear down the kobject resources
|
|
*/
|
|
void edac_device_remove_sysfs(struct edac_device_ctl_info *edac_dev)
|
|
{
|
|
edac_dbg(0, "\n");
|
|
|
|
/* remove any main attributes for this device */
|
|
edac_device_remove_main_sysfs_attributes(edac_dev);
|
|
|
|
/* remove the device sym link */
|
|
sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK);
|
|
|
|
/* walk the instance/block kobject tree, deconstructing it */
|
|
edac_device_delete_instances(edac_dev);
|
|
}
|