2 * file for managing the edac_device class of devices for EDAC
4 * (C) 2007 SoftwareBitMaker(http://www.softwarebitmaker.com)
5 * This file may be distributed under the terms of the
6 * GNU General Public License.
8 * Written Doug Thompson <norsk5@xmission.com>
12 #include <linux/ctype.h>
14 #include "edac_core.h"
15 #include "edac_module.h"
17 #define EDAC_DEVICE_SYMLINK "device"
19 #define to_edacdev(k) container_of(k, struct edac_device_ctl_info, kobj)
20 #define to_edacdev_attr(a) container_of(a, struct edacdev_attribute, attr)
22 /************************** edac_device sysfs code and data **************/
25 * Set of edac_device_ctl_info attribute store/show functions
29 static ssize_t edac_device_ctl_log_ue_show(struct edac_device_ctl_info
30 *ctl_info, char *data)
32 return sprintf(data, "%u\n", ctl_info->log_ue);
35 static ssize_t edac_device_ctl_log_ue_store(struct edac_device_ctl_info
36 *ctl_info, const char *data,
39 /* if parameter is zero, turn off flag, if non-zero turn on flag */
40 ctl_info->log_ue = (simple_strtoul(data, NULL, 0) != 0);
46 static ssize_t edac_device_ctl_log_ce_show(struct edac_device_ctl_info
47 *ctl_info, char *data)
49 return sprintf(data, "%u\n", ctl_info->log_ce);
52 static ssize_t edac_device_ctl_log_ce_store(struct edac_device_ctl_info
53 *ctl_info, const char *data,
56 /* if parameter is zero, turn off flag, if non-zero turn on flag */
57 ctl_info->log_ce = (simple_strtoul(data, NULL, 0) != 0);
63 static ssize_t edac_device_ctl_panic_on_ue_show(struct edac_device_ctl_info
64 *ctl_info, char *data)
66 return sprintf(data, "%u\n", ctl_info->panic_on_ue);
69 static ssize_t edac_device_ctl_panic_on_ue_store(struct edac_device_ctl_info
70 *ctl_info, const char *data,
73 /* if parameter is zero, turn off flag, if non-zero turn on flag */
74 ctl_info->panic_on_ue = (simple_strtoul(data, NULL, 0) != 0);
79 /* 'poll_msec' show and store functions*/
80 static ssize_t edac_device_ctl_poll_msec_show(struct edac_device_ctl_info
81 *ctl_info, char *data)
83 return sprintf(data, "%u\n", ctl_info->poll_msec);
86 static ssize_t edac_device_ctl_poll_msec_store(struct edac_device_ctl_info
87 *ctl_info, const char *data,
92 /* get the value and enforce that it is non-zero, must be at least
93 * one millisecond for the delay period, between scans
94 * Then cancel last outstanding delay for the work request
97 value = simple_strtoul(data, NULL, 0);
98 edac_device_reset_delay_period(ctl_info, value);
103 /* edac_device_ctl_info specific attribute structure */
104 struct ctl_info_attribute {
105 struct attribute attr;
106 ssize_t(*show) (struct edac_device_ctl_info *, char *);
107 ssize_t(*store) (struct edac_device_ctl_info *, const char *, size_t);
110 #define to_ctl_info(k) container_of(k, struct edac_device_ctl_info, kobj)
111 #define to_ctl_info_attr(a) container_of(a,struct ctl_info_attribute,attr)
113 /* Function to 'show' fields from the edac_dev 'ctl_info' structure */
114 static ssize_t edac_dev_ctl_info_show(struct kobject *kobj,
115 struct attribute *attr, char *buffer)
117 struct edac_device_ctl_info *edac_dev = to_ctl_info(kobj);
118 struct ctl_info_attribute *ctl_info_attr = to_ctl_info_attr(attr);
120 if (ctl_info_attr->show)
121 return ctl_info_attr->show(edac_dev, buffer);
125 /* Function to 'store' fields into the edac_dev 'ctl_info' structure */
126 static ssize_t edac_dev_ctl_info_store(struct kobject *kobj,
127 struct attribute *attr,
128 const char *buffer, size_t count)
130 struct edac_device_ctl_info *edac_dev = to_ctl_info(kobj);
131 struct ctl_info_attribute *ctl_info_attr = to_ctl_info_attr(attr);
133 if (ctl_info_attr->store)
134 return ctl_info_attr->store(edac_dev, buffer, count);
138 /* edac_dev file operations for an 'ctl_info' */
139 static struct sysfs_ops device_ctl_info_ops = {
140 .show = edac_dev_ctl_info_show,
141 .store = edac_dev_ctl_info_store
144 #define CTL_INFO_ATTR(_name,_mode,_show,_store) \
145 static struct ctl_info_attribute attr_ctl_info_##_name = { \
146 .attr = {.name = __stringify(_name), .mode = _mode }, \
151 /* Declare the various ctl_info attributes here and their respective ops */
152 CTL_INFO_ATTR(log_ue, S_IRUGO | S_IWUSR,
153 edac_device_ctl_log_ue_show, edac_device_ctl_log_ue_store);
154 CTL_INFO_ATTR(log_ce, S_IRUGO | S_IWUSR,
155 edac_device_ctl_log_ce_show, edac_device_ctl_log_ce_store);
156 CTL_INFO_ATTR(panic_on_ue, S_IRUGO | S_IWUSR,
157 edac_device_ctl_panic_on_ue_show,
158 edac_device_ctl_panic_on_ue_store);
159 CTL_INFO_ATTR(poll_msec, S_IRUGO | S_IWUSR,
160 edac_device_ctl_poll_msec_show, edac_device_ctl_poll_msec_store);
162 /* Base Attributes of the EDAC_DEVICE ECC object */
163 static struct ctl_info_attribute *device_ctrl_attr[] = {
164 &attr_ctl_info_panic_on_ue,
165 &attr_ctl_info_log_ue,
166 &attr_ctl_info_log_ce,
167 &attr_ctl_info_poll_msec,
171 /* Main DEVICE kobject release() function */
172 static void edac_device_ctrl_master_release(struct kobject *kobj)
174 struct edac_device_ctl_info *edac_dev;
176 edac_dev = to_edacdev(kobj);
178 debugf1("%s()\n", __func__);
179 complete(&edac_dev->kobj_complete);
182 static struct kobj_type ktype_device_ctrl = {
183 .release = edac_device_ctrl_master_release,
184 .sysfs_ops = &device_ctl_info_ops,
185 .default_attrs = (struct attribute **)device_ctrl_attr,
188 /**************** edac_device main kobj ctor/dtor code *********************/
191 * edac_device_register_main_kobj
193 * perform the high level setup for the new edac_device instance
198 static int edac_device_register_main_kobj(struct edac_device_ctl_info *edac_dev)
201 struct sysdev_class *edac_class;
203 debugf1("%s()\n", __func__);
205 /* get the /sys/devices/system/edac reference */
206 edac_class = edac_get_edac_class();
207 if (edac_class == NULL) {
208 debugf1("%s() no edac_class error=%d\n", __func__, err);
212 /* Point to the 'edac_class' this instance 'reports' to */
213 edac_dev->edac_class = edac_class;
215 /* Init the devices's kobject */
216 memset(&edac_dev->kobj, 0, sizeof(struct kobject));
217 edac_dev->kobj.ktype = &ktype_device_ctrl;
219 /* set this new device under the edac_class kobject */
220 edac_dev->kobj.parent = &edac_class->kset.kobj;
222 /* generate sysfs "..../edac/<name>" */
223 debugf1("%s() set name of kobject to: %s\n", __func__, edac_dev->name);
224 err = kobject_set_name(&edac_dev->kobj, "%s", edac_dev->name);
227 err = kobject_register(&edac_dev->kobj);
229 debugf1("%s()Failed to register '.../edac/%s'\n",
230 __func__, edac_dev->name);
234 debugf1("%s() Registered '.../edac/%s' kobject\n",
235 __func__, edac_dev->name);
241 * edac_device_unregister_main_kobj:
242 * the '..../edac/<name>' kobject
244 static void edac_device_unregister_main_kobj(struct edac_device_ctl_info
247 debugf0("%s()\n", __func__);
248 debugf1("%s() name of kobject is: %s\n",
249 __func__, kobject_name(&edac_dev->kobj));
251 init_completion(&edac_dev->kobj_complete);
254 * Unregister the edac device's kobject and
255 * wait for reference count to reach 0.
257 kobject_unregister(&edac_dev->kobj);
258 wait_for_completion(&edac_dev->kobj_complete);
261 /*************** edac_dev -> instance information ***********/
264 * Set of low-level instance attribute show functions
266 static ssize_t instance_ue_count_show(struct edac_device_instance *instance,
269 return sprintf(data, "%u\n", instance->counters.ue_count);
272 static ssize_t instance_ce_count_show(struct edac_device_instance *instance,
275 return sprintf(data, "%u\n", instance->counters.ce_count);
278 #define to_instance(k) container_of(k, struct edac_device_instance, kobj)
279 #define to_instance_attr(a) container_of(a,struct instance_attribute,attr)
281 /* DEVICE instance kobject release() function */
282 static void edac_device_ctrl_instance_release(struct kobject *kobj)
284 struct edac_device_instance *instance;
286 debugf1("%s()\n", __func__);
288 instance = to_instance(kobj);
289 complete(&instance->kobj_complete);
292 /* instance specific attribute structure */
293 struct instance_attribute {
294 struct attribute attr;
295 ssize_t(*show) (struct edac_device_instance *, char *);
296 ssize_t(*store) (struct edac_device_instance *, const char *, size_t);
299 /* Function to 'show' fields from the edac_dev 'instance' structure */
300 static ssize_t edac_dev_instance_show(struct kobject *kobj,
301 struct attribute *attr, char *buffer)
303 struct edac_device_instance *instance = to_instance(kobj);
304 struct instance_attribute *instance_attr = to_instance_attr(attr);
306 if (instance_attr->show)
307 return instance_attr->show(instance, buffer);
311 /* Function to 'store' fields into the edac_dev 'instance' structure */
312 static ssize_t edac_dev_instance_store(struct kobject *kobj,
313 struct attribute *attr,
314 const char *buffer, size_t count)
316 struct edac_device_instance *instance = to_instance(kobj);
317 struct instance_attribute *instance_attr = to_instance_attr(attr);
319 if (instance_attr->store)
320 return instance_attr->store(instance, buffer, count);
324 /* edac_dev file operations for an 'instance' */
325 static struct sysfs_ops device_instance_ops = {
326 .show = edac_dev_instance_show,
327 .store = edac_dev_instance_store
330 #define INSTANCE_ATTR(_name,_mode,_show,_store) \
331 static struct instance_attribute attr_instance_##_name = { \
332 .attr = {.name = __stringify(_name), .mode = _mode }, \
338 * Define attributes visible for the edac_device instance object
339 * Each contains a pointer to a show and an optional set
340 * function pointer that does the low level output/input
342 INSTANCE_ATTR(ce_count, S_IRUGO, instance_ce_count_show, NULL);
343 INSTANCE_ATTR(ue_count, S_IRUGO, instance_ue_count_show, NULL);
345 /* list of edac_dev 'instance' attributes */
346 static struct instance_attribute *device_instance_attr[] = {
347 &attr_instance_ce_count,
348 &attr_instance_ue_count,
352 /* The 'ktype' for each edac_dev 'instance' */
353 static struct kobj_type ktype_instance_ctrl = {
354 .release = edac_device_ctrl_instance_release,
355 .sysfs_ops = &device_instance_ops,
356 .default_attrs = (struct attribute **)device_instance_attr,
359 /*************** edac_dev -> instance -> block information *********/
362 * Set of low-level block attribute show functions
364 static ssize_t block_ue_count_show(struct edac_device_block *block, char *data)
366 return sprintf(data, "%u\n", block->counters.ue_count);
369 static ssize_t block_ce_count_show(struct edac_device_block *block, char *data)
371 return sprintf(data, "%u\n", block->counters.ce_count);
374 #define to_block(k) container_of(k, struct edac_device_block, kobj)
375 #define to_block_attr(a) container_of(a,struct block_attribute,attr)
377 /* DEVICE block kobject release() function */
378 static void edac_device_ctrl_block_release(struct kobject *kobj)
380 struct edac_device_block *block;
382 debugf1("%s()\n", __func__);
384 block = to_block(kobj);
385 complete(&block->kobj_complete);
388 /* block specific attribute structure */
389 struct block_attribute {
390 struct attribute attr;
391 ssize_t(*show) (struct edac_device_block *, char *);
392 ssize_t(*store) (struct edac_device_block *, const char *, size_t);
395 /* Function to 'show' fields from the edac_dev 'block' structure */
396 static ssize_t edac_dev_block_show(struct kobject *kobj,
397 struct attribute *attr, char *buffer)
399 struct edac_device_block *block = to_block(kobj);
400 struct block_attribute *block_attr = to_block_attr(attr);
402 if (block_attr->show)
403 return block_attr->show(block, buffer);
407 /* Function to 'store' fields into the edac_dev 'block' structure */
408 static ssize_t edac_dev_block_store(struct kobject *kobj,
409 struct attribute *attr,
410 const char *buffer, size_t count)
412 struct edac_device_block *block = to_block(kobj);
413 struct block_attribute *block_attr = to_block_attr(attr);
415 if (block_attr->store)
416 return block_attr->store(block, buffer, count);
420 /* edac_dev file operations for a 'block' */
421 static struct sysfs_ops device_block_ops = {
422 .show = edac_dev_block_show,
423 .store = edac_dev_block_store
426 #define BLOCK_ATTR(_name,_mode,_show,_store) \
427 static struct block_attribute attr_block_##_name = { \
428 .attr = {.name = __stringify(_name), .mode = _mode }, \
433 BLOCK_ATTR(ce_count, S_IRUGO, block_ce_count_show, NULL);
434 BLOCK_ATTR(ue_count, S_IRUGO, block_ue_count_show, NULL);
436 /* list of edac_dev 'block' attributes */
437 static struct block_attribute *device_block_attr[] = {
438 &attr_block_ce_count,
439 &attr_block_ue_count,
443 /* The 'ktype' for each edac_dev 'block' */
444 static struct kobj_type ktype_block_ctrl = {
445 .release = edac_device_ctrl_block_release,
446 .sysfs_ops = &device_block_ops,
447 .default_attrs = (struct attribute **)device_block_attr,
450 /************** block ctor/dtor code ************/
453 * edac_device_create_block
455 static int edac_device_create_block(struct edac_device_ctl_info *edac_dev,
456 struct edac_device_instance *instance,
461 struct edac_device_block *block;
462 struct edac_dev_sysfs_block_attribute *sysfs_attrib;
464 block = &instance->blocks[idx];
466 debugf1("%s() Instance '%s' block[%d] '%s'\n",
467 __func__, instance->name, idx, block->name);
469 /* init this block's kobject */
470 memset(&block->kobj, 0, sizeof(struct kobject));
471 block->kobj.parent = &instance->kobj;
472 block->kobj.ktype = &ktype_block_ctrl;
474 err = kobject_set_name(&block->kobj, "%s", block->name);
478 err = kobject_register(&block->kobj);
480 debugf1("%s()Failed to register instance '%s'\n",
481 __func__, block->name);
485 /* If there are driver level block attributes, then added them
486 * to the block kobject
488 sysfs_attrib = block->block_attributes;
489 if (sysfs_attrib != NULL) {
490 for (i = 0; i < block->nr_attribs; i++) {
491 err = sysfs_create_file(&block->kobj,
492 (struct attribute *) &sysfs_attrib[i]);
503 kobject_unregister(&block->kobj);
509 * edac_device_delete_block(edac_dev,j);
511 static void edac_device_delete_block(struct edac_device_ctl_info *edac_dev,
512 struct edac_device_instance *instance,
515 struct edac_device_block *block;
517 block = &instance->blocks[idx];
519 /* unregister this block's kobject */
520 init_completion(&block->kobj_complete);
521 kobject_unregister(&block->kobj);
522 wait_for_completion(&block->kobj_complete);
525 /************** instance ctor/dtor code ************/
528 * edac_device_create_instance
529 * create just one instance of an edac_device 'instance'
531 static int edac_device_create_instance(struct edac_device_ctl_info *edac_dev,
536 struct edac_device_instance *instance;
538 instance = &edac_dev->instances[idx];
540 /* Init the instance's kobject */
541 memset(&instance->kobj, 0, sizeof(struct kobject));
543 /* set this new device under the edac_device main kobject */
544 instance->kobj.parent = &edac_dev->kobj;
545 instance->kobj.ktype = &ktype_instance_ctrl;
547 err = kobject_set_name(&instance->kobj, "%s", instance->name);
551 err = kobject_register(&instance->kobj);
553 debugf2("%s() Failed to register instance '%s'\n",
554 __func__, instance->name);
558 debugf1("%s() now register '%d' blocks for instance %d\n",
559 __func__, instance->nr_blocks, idx);
561 /* register all blocks of this instance */
562 for (i = 0; i < instance->nr_blocks; i++) {
563 err = edac_device_create_block(edac_dev, instance, i);
565 for (j = 0; j < i; j++)
566 edac_device_delete_block(edac_dev, instance, j);
571 debugf1("%s() Registered instance %d '%s' kobject\n",
572 __func__, idx, instance->name);
578 * edac_device_remove_instance
579 * remove an edac_device instance
581 static void edac_device_delete_instance(struct edac_device_ctl_info *edac_dev,
585 struct edac_device_instance *instance;
587 instance = &edac_dev->instances[idx];
589 /* unregister all blocks in this instance */
590 for (i = 0; i < instance->nr_blocks; i++)
591 edac_device_delete_block(edac_dev, instance, i);
593 /* unregister this instance's kobject */
594 init_completion(&instance->kobj_complete);
595 kobject_unregister(&instance->kobj);
596 wait_for_completion(&instance->kobj_complete);
600 * edac_device_create_instances
601 * create the first level of 'instances' for this device
602 * (ie 'cache' might have 'cache0', 'cache1', 'cache2', etc
604 static int edac_device_create_instances(struct edac_device_ctl_info *edac_dev)
609 debugf0("%s()\n", __func__);
611 /* iterate over creation of the instances */
612 for (i = 0; i < edac_dev->nr_instances; i++) {
613 err = edac_device_create_instance(edac_dev, i);
615 /* unwind previous instances on error */
616 for (j = 0; j < i; j++)
617 edac_device_delete_instance(edac_dev, j);
626 * edac_device_delete_instances(edac_dev);
627 * unregister all the kobjects of the instances
629 static void edac_device_delete_instances(struct edac_device_ctl_info *edac_dev)
633 /* iterate over creation of the instances */
634 for (i = 0; i < edac_dev->nr_instances; i++)
635 edac_device_delete_instance(edac_dev, i);
638 /******************* edac_dev sysfs ctor/dtor code *************/
641 * edac_device_add_sysfs_attributes
642 * add some attributes to this instance's main kobject
644 static int edac_device_add_sysfs_attributes(
645 struct edac_device_ctl_info *edac_dev)
648 struct edac_dev_sysfs_attribute *sysfs_attrib;
650 /* point to the start of the array and iterate over it
651 * adding each attribute listed to this mci instance's kobject
653 sysfs_attrib = edac_dev->sysfs_attributes;
655 while (sysfs_attrib->attr.name != NULL) {
656 err = sysfs_create_file(&edac_dev->kobj,
657 (struct attribute*) sysfs_attrib);
668 * edac_device_create_sysfs() Constructor
670 * Create a new edac_device kobject instance,
676 int edac_device_create_sysfs(struct edac_device_ctl_info *edac_dev)
679 struct kobject *edac_kobj = &edac_dev->kobj;
681 /* register this instance's main kobj with the edac class kobj */
682 err = edac_device_register_main_kobj(edac_dev);
686 debugf0("%s() idx=%d\n", __func__, edac_dev->dev_idx);
688 /* If the low level driver requests some sysfs entries
689 * then go create them here
691 if (edac_dev->sysfs_attributes != NULL) {
692 err = edac_device_add_sysfs_attributes(edac_dev);
694 debugf0("%s() failed to add sysfs attribs\n",
696 goto err_unreg_object;
700 /* create a symlink from the edac device
701 * to the platform 'device' being used for this
703 err = sysfs_create_link(edac_kobj,
704 &edac_dev->dev->kobj, EDAC_DEVICE_SYMLINK);
706 debugf0("%s() sysfs_create_link() returned err= %d\n",
708 goto err_unreg_object;
711 debugf0("%s() calling create-instances, idx=%d\n",
712 __func__, edac_dev->dev_idx);
714 /* Create the first level instance directories */
715 err = edac_device_create_instances(edac_dev);
717 goto err_remove_link;
721 /* Error unwind stack */
723 /* remove the sym link */
724 sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK);
727 edac_device_unregister_main_kobj(edac_dev);
733 * edac_device_remove_sysfs() destructor
735 * remove a edac_device instance
737 void edac_device_remove_sysfs(struct edac_device_ctl_info *edac_dev)
739 debugf0("%s()\n", __func__);
741 edac_device_delete_instances(edac_dev);
743 /* remove the sym link */
744 sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK);
746 /* unregister the instance's main kobj */
747 edac_device_unregister_main_kobj(edac_dev);