| /* |
| * file for managing the edac_device class of devices for EDAC |
| * |
| * (C) 2007 SoftwareBitMaker |
| * |
| * This file may be distributed under the terms of the |
| * GNU General Public License. |
| * |
| * Written Doug Thompson <norsk5@xmission.com> |
| * |
| */ |
| |
| #include <linux/ctype.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| |
| #include "edac_core.h" |
| #include "edac_module.h" |
| |
| #define EDAC_DEVICE_SYMLINK "device" |
| |
| #define to_edacdev(k) container_of(k, struct edac_device_ctl_info, kobj) |
| #define to_edacdev_attr(a) container_of(a, struct edacdev_attribute, attr) |
| |
| |
| /* |
| * Set of edac_device_ctl_info attribute store/show functions |
| */ |
| |
| /* 'log_ue' */ |
| static ssize_t edac_device_ctl_log_ue_show(struct edac_device_ctl_info |
| *ctl_info, char *data) |
| { |
| return sprintf(data, "%u\n", ctl_info->log_ue); |
| } |
| |
| static ssize_t edac_device_ctl_log_ue_store(struct edac_device_ctl_info |
| *ctl_info, const char *data, |
| size_t count) |
| { |
| /* if parameter is zero, turn off flag, if non-zero turn on flag */ |
| ctl_info->log_ue = (simple_strtoul(data, NULL, 0) != 0); |
| |
| return count; |
| } |
| |
| /* 'log_ce' */ |
| static ssize_t edac_device_ctl_log_ce_show(struct edac_device_ctl_info |
| *ctl_info, char *data) |
| { |
| return sprintf(data, "%u\n", ctl_info->log_ce); |
| } |
| |
| static ssize_t edac_device_ctl_log_ce_store(struct edac_device_ctl_info |
| *ctl_info, const char *data, |
| size_t count) |
| { |
| /* if parameter is zero, turn off flag, if non-zero turn on flag */ |
| ctl_info->log_ce = (simple_strtoul(data, NULL, 0) != 0); |
| |
| return count; |
| } |
| |
| /* 'panic_on_ue' */ |
| static ssize_t edac_device_ctl_panic_on_ue_show(struct edac_device_ctl_info |
| *ctl_info, char *data) |
| { |
| return sprintf(data, "%u\n", ctl_info->panic_on_ue); |
| } |
| |
| static ssize_t edac_device_ctl_panic_on_ue_store(struct edac_device_ctl_info |
| *ctl_info, const char *data, |
| size_t count) |
| { |
| /* if parameter is zero, turn off flag, if non-zero turn on flag */ |
| ctl_info->panic_on_ue = (simple_strtoul(data, NULL, 0) != 0); |
| |
| return count; |
| } |
| |
| /* 'poll_msec' show and store functions*/ |
| static ssize_t edac_device_ctl_poll_msec_show(struct edac_device_ctl_info |
| *ctl_info, char *data) |
| { |
| return sprintf(data, "%u\n", ctl_info->poll_msec); |
| } |
| |
| static ssize_t edac_device_ctl_poll_msec_store(struct edac_device_ctl_info |
| *ctl_info, const char *data, |
| size_t count) |
| { |
| unsigned long value; |
| |
| /* get the value and enforce that it is non-zero, must be at least |
| * one millisecond for the delay period, between scans |
| * Then cancel last outstanding delay for the work request |
| * and set a new one. |
| */ |
| value = simple_strtoul(data, NULL, 0); |
| edac_device_reset_delay_period(ctl_info, value); |
| |
| return count; |
| } |
| |
| /* edac_device_ctl_info specific attribute structure */ |
| struct ctl_info_attribute { |
| struct attribute attr; |
| ssize_t(*show) (struct edac_device_ctl_info *, char *); |
| ssize_t(*store) (struct edac_device_ctl_info *, const char *, size_t); |
| }; |
| |
| #define to_ctl_info(k) container_of(k, struct edac_device_ctl_info, kobj) |
| #define to_ctl_info_attr(a) container_of(a,struct ctl_info_attribute,attr) |
| |
| /* Function to 'show' fields from the edac_dev 'ctl_info' structure */ |
| static ssize_t edac_dev_ctl_info_show(struct kobject *kobj, |
| struct attribute *attr, char *buffer) |
| { |
| struct edac_device_ctl_info *edac_dev = to_ctl_info(kobj); |
| struct ctl_info_attribute *ctl_info_attr = to_ctl_info_attr(attr); |
| |
| if (ctl_info_attr->show) |
| return ctl_info_attr->show(edac_dev, buffer); |
| return -EIO; |
| } |
| |
| /* Function to 'store' fields into the edac_dev 'ctl_info' structure */ |
| static ssize_t edac_dev_ctl_info_store(struct kobject *kobj, |
| struct attribute *attr, |
| const char *buffer, size_t count) |
| { |
| struct edac_device_ctl_info *edac_dev = to_ctl_info(kobj); |
| struct ctl_info_attribute *ctl_info_attr = to_ctl_info_attr(attr); |
| |
| if (ctl_info_attr->store) |
| return ctl_info_attr->store(edac_dev, buffer, count); |
| return -EIO; |
| } |
| |
| /* edac_dev file operations for an 'ctl_info' */ |
| static const struct sysfs_ops device_ctl_info_ops = { |
| .show = edac_dev_ctl_info_show, |
| .store = edac_dev_ctl_info_store |
| }; |
| |
| #define CTL_INFO_ATTR(_name,_mode,_show,_store) \ |
| static struct ctl_info_attribute attr_ctl_info_##_name = { \ |
| .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| .show = _show, \ |
| .store = _store, \ |
| }; |
| |
| /* Declare the various ctl_info attributes here and their respective ops */ |
| CTL_INFO_ATTR(log_ue, S_IRUGO | S_IWUSR, |
| edac_device_ctl_log_ue_show, edac_device_ctl_log_ue_store); |
| CTL_INFO_ATTR(log_ce, S_IRUGO | S_IWUSR, |
| edac_device_ctl_log_ce_show, edac_device_ctl_log_ce_store); |
| CTL_INFO_ATTR(panic_on_ue, S_IRUGO | S_IWUSR, |
| edac_device_ctl_panic_on_ue_show, |
| edac_device_ctl_panic_on_ue_store); |
| CTL_INFO_ATTR(poll_msec, S_IRUGO | S_IWUSR, |
| edac_device_ctl_poll_msec_show, edac_device_ctl_poll_msec_store); |
| |
| /* Base Attributes of the EDAC_DEVICE ECC object */ |
| static struct ctl_info_attribute *device_ctrl_attr[] = { |
| &attr_ctl_info_panic_on_ue, |
| &attr_ctl_info_log_ue, |
| &attr_ctl_info_log_ce, |
| &attr_ctl_info_poll_msec, |
| NULL, |
| }; |
| |
| /* |
| * edac_device_ctrl_master_release |
| * |
| * called when the reference count for the 'main' kobj |
| * for a edac_device control struct reaches zero |
| * |
| * Reference count model: |
| * One 'main' kobject for each control structure allocated. |
| * That main kobj is initially set to one AND |
| * the reference count for the EDAC 'core' module is |
| * bumped by one, thus added 'keep in memory' dependency. |
| * |
| * Each new internal kobj (in instances and blocks) then |
| * bumps the 'main' kobject. |
| * |
| * When they are released their release functions decrement |
| * the 'main' kobj. |
| * |
| * When the main kobj reaches zero (0) then THIS function |
| * is called which then decrements the EDAC 'core' module. |
| * When the module reference count reaches zero then the |
| * module no longer has dependency on keeping the release |
| * function code in memory and module can be unloaded. |
| * |
| * This will support several control objects as well, each |
| * with its own 'main' kobj. |
| */ |
| static void edac_device_ctrl_master_release(struct kobject *kobj) |
| { |
| struct edac_device_ctl_info *edac_dev = to_edacdev(kobj); |
| |
| debugf4("%s() control index=%d\n", __func__, edac_dev->dev_idx); |
| |
| /* decrement the EDAC CORE module ref count */ |
| module_put(edac_dev->owner); |
| |
| /* free the control struct containing the 'main' kobj |
| * passed in to this routine |
| */ |
| kfree(edac_dev); |
| } |
| |
| /* ktype for the main (master) kobject */ |
| static struct kobj_type ktype_device_ctrl = { |
| .release = edac_device_ctrl_master_release, |
| .sysfs_ops = &device_ctl_info_ops, |
| .default_attrs = (struct attribute **)device_ctrl_attr, |
| }; |
| |
| /* |
| * edac_device_register_sysfs_main_kobj |
| * |
| * perform the high level setup for the new edac_device instance |
| * |
| * Return: 0 SUCCESS |
| * !0 FAILURE |
| */ |
| int edac_device_register_sysfs_main_kobj(struct edac_device_ctl_info *edac_dev) |
| { |
| struct sysdev_class *edac_class; |
| int err; |
| |
| debugf1("%s()\n", __func__); |
| |
| /* get the /sys/devices/system/edac reference */ |
| edac_class = edac_get_edac_class(); |
| if (edac_class == NULL) { |
| debugf1("%s() no edac_class error\n", __func__); |
| err = -ENODEV; |
| goto err_out; |
| } |
| |
| /* Point to the 'edac_class' this instance 'reports' to */ |
| edac_dev->edac_class = edac_class; |
| |
| /* Init the devices's kobject */ |
| memset(&edac_dev->kobj, 0, sizeof(struct kobject)); |
| |
| /* Record which module 'owns' this control structure |
| * and bump the ref count of the module |
| */ |
| edac_dev->owner = THIS_MODULE; |
| |
| if (!try_module_get(edac_dev->owner)) { |
| err = -ENODEV; |
| goto err_out; |
| } |
| |
| /* register */ |
| err = kobject_init_and_add(&edac_dev->kobj, &ktype_device_ctrl, |
| &edac_class->kset.kobj, |
| "%s", edac_dev->name); |
| if (err) { |
| debugf1("%s()Failed to register '.../edac/%s'\n", |
| __func__, edac_dev->name); |
| goto err_kobj_reg; |
| } |
| kobject_uevent(&edac_dev->kobj, KOBJ_ADD); |
| |
| /* At this point, to 'free' the control struct, |
| * edac_device_unregister_sysfs_main_kobj() must be used |
| */ |
| |
| debugf4("%s() Registered '.../edac/%s' kobject\n", |
| __func__, edac_dev->name); |
| |
| return 0; |
| |
| /* Error exit stack */ |
| err_kobj_reg: |
| module_put(edac_dev->owner); |
| |
| err_out: |
| return err; |
| } |
| |
| /* |
| * edac_device_unregister_sysfs_main_kobj: |
| * the '..../edac/<name>' kobject |
| */ |
| void edac_device_unregister_sysfs_main_kobj( |
| struct edac_device_ctl_info *edac_dev) |
| { |
| debugf0("%s()\n", __func__); |
| debugf4("%s() name of kobject is: %s\n", |
| __func__, kobject_name(&edac_dev->kobj)); |
| |
| /* |
| * Unregister the edac device's kobject and |
| * allow for reference count to reach 0 at which point |
| * the callback will be called to: |
| * a) module_put() this module |
| * b) 'kfree' the memory |
| */ |
| kobject_put(&edac_dev->kobj); |
| } |
| |
| /* edac_dev -> instance information */ |
| |
| /* |
| * Set of low-level instance attribute show functions |
| */ |
| static ssize_t instance_ue_count_show(struct edac_device_instance *instance, |
| char *data) |
| { |
| return sprintf(data, "%u\n", instance->counters.ue_count); |
| } |
| |
| static ssize_t instance_ce_count_show(struct edac_device_instance *instance, |
| char *data) |
| { |
| return sprintf(data, "%u\n", instance->counters.ce_count); |
| } |
| |
| #define to_instance(k) container_of(k, struct edac_device_instance, kobj) |
| #define to_instance_attr(a) container_of(a,struct instance_attribute,attr) |
| |
| /* DEVICE instance kobject release() function */ |
| static void edac_device_ctrl_instance_release(struct kobject *kobj) |
| { |
| struct edac_device_instance *instance; |
| |
| debugf1("%s()\n", __func__); |
| |
| /* map from this kobj to the main control struct |
| * and then dec the main kobj count |
| */ |
| instance = to_instance(kobj); |
| kobject_put(&instance->ctl->kobj); |
| } |
| |
| /* instance specific attribute structure */ |
| struct instance_attribute { |
| struct attribute attr; |
| ssize_t(*show) (struct edac_device_instance *, char *); |
| ssize_t(*store) (struct edac_device_instance *, const char *, size_t); |
| }; |
| |
| /* Function to 'show' fields from the edac_dev 'instance' structure */ |
| static ssize_t edac_dev_instance_show(struct kobject *kobj, |
| struct attribute *attr, char *buffer) |
| { |
| struct edac_device_instance *instance = to_instance(kobj); |
| struct instance_attribute *instance_attr = to_instance_attr(attr); |
| |
| if (instance_attr->show) |
| return instance_attr->show(instance, buffer); |
| return -EIO; |
| } |
| |
| /* Function to 'store' fields into the edac_dev 'instance' structure */ |
| static ssize_t edac_dev_instance_store(struct kobject *kobj, |
| struct attribute *attr, |
| const char *buffer, size_t count) |
| { |
| struct edac_device_instance *instance = to_instance(kobj); |
| struct instance_attribute *instance_attr = to_instance_attr(attr); |
| |
| if (instance_attr->store) |
| return instance_attr->store(instance, buffer, count); |
| return -EIO; |
| } |
| |
| /* edac_dev file operations for an 'instance' */ |
| static const struct sysfs_ops device_instance_ops = { |
| .show = edac_dev_instance_show, |
| .store = edac_dev_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, \ |
| }; |
| |
| /* |
| * Define attributes visible for the edac_device instance object |
| * Each contains a pointer to a show and an optional set |
| * function pointer that does the low level output/input |
| */ |
| INSTANCE_ATTR(ce_count, S_IRUGO, instance_ce_count_show, NULL); |
| INSTANCE_ATTR(ue_count, S_IRUGO, instance_ue_count_show, NULL); |
| |
| /* list of edac_dev 'instance' attributes */ |
| static struct instance_attribute *device_instance_attr[] = { |
| &attr_instance_ce_count, |
| &attr_instance_ue_count, |
| NULL, |
| }; |
| |
| /* The 'ktype' for each edac_dev 'instance' */ |
| static struct kobj_type ktype_instance_ctrl = { |
| .release = edac_device_ctrl_instance_release, |
| .sysfs_ops = &device_instance_ops, |
| .default_attrs = (struct attribute **)device_instance_attr, |
| }; |
| |
| /* edac_dev -> instance -> block information */ |
| |
| #define to_block(k) container_of(k, struct edac_device_block, kobj) |
| #define to_block_attr(a) \ |
| container_of(a, struct edac_dev_sysfs_block_attribute, attr) |
| |
| /* |
| * Set of low-level block attribute show functions |
| */ |
| static ssize_t block_ue_count_show(struct kobject *kobj, |
| struct attribute *attr, char *data) |
| { |
| struct edac_device_block *block = to_block(kobj); |
| |
| return sprintf(data, "%u\n", block->counters.ue_count); |
| } |
| |
| static ssize_t block_ce_count_show(struct kobject *kobj, |
| struct attribute *attr, char *data) |
| { |
| struct edac_device_block *block = to_block(kobj); |
| |
| return sprintf(data, "%u\n", block->counters.ce_count); |
| } |
| |
| /* DEVICE block kobject release() function */ |
| static void edac_device_ctrl_block_release(struct kobject *kobj) |
| { |
| struct edac_device_block *block; |
| |
| debugf1("%s()\n", __func__); |
| |
| /* get the container of the kobj */ |
| block = to_block(kobj); |
| |
| /* map from 'block kobj' to 'block->instance->controller->main_kobj' |
| * now 'release' the block kobject |
| */ |
| kobject_put(&block->instance->ctl->kobj); |
| } |
| |
| |
| /* Function to 'show' fields from the edac_dev 'block' structure */ |
| static ssize_t edac_dev_block_show(struct kobject *kobj, |
| struct attribute *attr, char *buffer) |
| { |
| struct edac_dev_sysfs_block_attribute *block_attr = |
| to_block_attr(attr); |
| |
| if (block_attr->show) |
| return block_attr->show(kobj, attr, buffer); |
| return -EIO; |
| } |
| |
| /* Function to 'store' fields into the edac_dev 'block' structure */ |
| static ssize_t edac_dev_block_store(struct kobject *kobj, |
| struct attribute *attr, |
| const char *buffer, size_t count) |
| { |
| struct edac_dev_sysfs_block_attribute *block_attr; |
| |
| block_attr = to_block_attr(attr); |
| |
| if (block_attr->store) |
| return block_attr->store(kobj, attr, buffer, count); |
| return -EIO; |
| } |
| |
| /* edac_dev file operations for a 'block' */ |
| static const struct sysfs_ops device_block_ops = { |
| .show = edac_dev_block_show, |
| .store = edac_dev_block_store |
| }; |
| |
| #define BLOCK_ATTR(_name,_mode,_show,_store) \ |
| static struct edac_dev_sysfs_block_attribute attr_block_##_name = { \ |
| .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| .show = _show, \ |
| .store = _store, \ |
| }; |
| |
| BLOCK_ATTR(ce_count, S_IRUGO, block_ce_count_show, NULL); |
| BLOCK_ATTR(ue_count, S_IRUGO, block_ue_count_show, NULL); |
| |
| /* list of edac_dev 'block' attributes */ |
| static struct edac_dev_sysfs_block_attribute *device_block_attr[] = { |
| &attr_block_ce_count, |
| &attr_block_ue_count, |
| NULL, |
| }; |
| |
| /* 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; |
| |
| debugf4("%s() Instance '%s' inst_p=%p block '%s' block_p=%p\n", |
| __func__, instance->name, instance, block->name, block); |
| debugf4("%s() block kobj=%p block kobj->parent=%p\n", |
| __func__, &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 dependant 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) { |
| debugf1("%s() Failed to register instance '%s'\n", |
| __func__, 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++) { |
| |
| debugf4("%s() creating block attrib='%s' " |
| "attrib->%p to kobj=%p\n", |
| __func__, |
| 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 dependant 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) { |
| debugf2("%s() Failed to register instance '%s'\n", |
| __func__, instance->name); |
| kobject_put(main_kobj); |
| goto err_out; |
| } |
| |
| debugf4("%s() now register '%d' blocks for instance %d\n", |
| __func__, 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); |
| |
| debugf4("%s() Registered instance %d '%s' kobject\n", |
| __func__, 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; |
| |
| debugf0("%s()\n", __func__); |
| |
| /* 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; |
| |
| debugf0("%s() idx=%d\n", __func__, edac_dev->dev_idx); |
| |
| /* go create any main attributes callers wants */ |
| err = edac_device_add_main_sysfs_attributes(edac_dev); |
| if (err) { |
| debugf0("%s() failed to add sysfs attribs\n", __func__); |
| 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) { |
| debugf0("%s() sysfs_create_link() returned err= %d\n", |
| __func__, 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) { |
| debugf0("%s() edac_device_create_instances() " |
| "returned err= %d\n", __func__, err); |
| goto err_remove_link; |
| } |
| |
| |
| debugf4("%s() create-instances done, idx=%d\n", |
| __func__, 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) |
| { |
| debugf0("%s()\n", __func__); |
| |
| /* 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); |
| } |