summaryrefslogtreecommitdiff
path: root/drivers/edac/edac_device.c
blob: ca9113e1c1060ad9195d7cba55a35d70ed007f20 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
/*
 * edac_device.c
 * (C) 2007 www.douglaskthompson.com
 *
 * This file may be distributed under the terms of the
 * GNU General Public License.
 *
 * Written by Doug Thompson <norsk5@xmission.com>
 *
 * edac_device API implementation
 * 19 Jan 2007
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/smp.h>
#include <linux/init.h>
#include <linux/sysctl.h>
#include <linux/highmem.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/sysdev.h>
#include <linux/ctype.h>
#include <linux/workqueue.h>
#include <asm/uaccess.h>
#include <asm/page.h>

#include "edac_core.h"
#include "edac_module.h"

/* lock for the list: 'edac_device_list', manipulation of this list
 * is protected by the 'device_ctls_mutex' lock
 */
static DEFINE_MUTEX(device_ctls_mutex);
static LIST_HEAD(edac_device_list);

#ifdef CONFIG_EDAC_DEBUG
static void edac_device_dump_device(struct edac_device_ctl_info *edac_dev)
{
	debugf3("\tedac_dev = %p dev_idx=%d \n", edac_dev, edac_dev->dev_idx);
	debugf4("\tedac_dev->edac_check = %p\n", edac_dev->edac_check);
	debugf3("\tdev = %p\n", edac_dev->dev);
	debugf3("\tmod_name:ctl_name = %s:%s\n",
		edac_dev->mod_name, edac_dev->ctl_name);
	debugf3("\tpvt_info = %p\n\n", edac_dev->pvt_info);
}
#endif				/* CONFIG_EDAC_DEBUG */


/*
 * edac_device_alloc_ctl_info()
 *	Allocate a new edac device control info structure
 *
 *	The control structure is allocated in complete chunk
 *	from the OS. It is in turn sub allocated to the
 *	various objects that compose the struture
 *
 *	The structure has a 'nr_instance' array within itself.
 *	Each instance represents a major component
 *		Example:  L1 cache and L2 cache are 2 instance components
 *
 *	Within each instance is an array of 'nr_blocks' blockoffsets
 */
struct edac_device_ctl_info *edac_device_alloc_ctl_info(
	unsigned sz_private,
	char *edac_device_name, unsigned nr_instances,
	char *edac_block_name, unsigned nr_blocks,
	unsigned offset_value,		/* zero, 1, or other based offset */
	struct edac_dev_sysfs_block_attribute *attrib_spec, unsigned nr_attrib,
	int device_index)
{
	struct edac_device_ctl_info *dev_ctl;
	struct edac_device_instance *dev_inst, *inst;
	struct edac_device_block *dev_blk, *blk_p, *blk;
	struct edac_dev_sysfs_block_attribute *dev_attrib, *attrib_p, *attrib;
	unsigned total_size;
	unsigned count;
	unsigned instance, block, attr;
	void *pvt;
	int err;

	debugf4("%s() instances=%d blocks=%d\n",
		__func__, nr_instances, nr_blocks);

	/* Calculate the size of memory we need to allocate AND
	 * determine the offsets of the various item arrays
	 * (instance,block,attrib) from the start of an  allocated structure.
	 * We want the alignment of each item  (instance,block,attrib)
	 * to be at least as stringent as what the compiler would
	 * provide if we could simply hardcode everything into a single struct.
	 */
	dev_ctl = (struct edac_device_ctl_info *)NULL;

	/* Calc the 'end' offset past end of ONE ctl_info structure
	 * which will become the start of the 'instance' array
	 */
	dev_inst = edac_align_ptr(&dev_ctl[1], sizeof(*dev_inst));

	/* Calc the 'end' offset past the instance array within the ctl_info
	 * which will become the start of the block array
	 */
	dev_blk = edac_align_ptr(&dev_inst[nr_instances], sizeof(*dev_blk));

	/* Calc the 'end' offset past the dev_blk array
	 * which will become the start of the attrib array, if any.
	 */
	count = nr_instances * nr_blocks;
	dev_attrib = edac_align_ptr(&dev_blk[count], sizeof(*dev_attrib));

	/* Check for case of when an attribute array is specified */
	if (nr_attrib > 0) {
		/* calc how many nr_attrib we need */
		count *= nr_attrib;

		/* Calc the 'end' offset past the attributes array */
		pvt = edac_align_ptr(&dev_attrib[count], sz_private);
	} else {
		/* no attribute array specificed */
		pvt = edac_align_ptr(dev_attrib, sz_private);
	}

	/* 'pvt' now points to where the private data area is.
	 * At this point 'pvt' (like dev_inst,dev_blk and dev_attrib)
	 * is baselined at ZERO
	 */
	total_size = ((unsigned long)pvt) + sz_private;

	/* Allocate the amount of memory for the set of control structures */
	dev_ctl = kzalloc(total_size, GFP_KERNEL);
	if (dev_ctl == NULL)
		return NULL;

	/* Adjust pointers so they point within the actual memory we
	 * just allocated rather than an imaginary chunk of memory
	 * located at address 0.
	 * 'dev_ctl' points to REAL memory, while the others are
	 * ZERO based and thus need to be adjusted to point within
	 * the allocated memory.
	 */
	dev_inst = (struct edac_device_instance *)
		(((char *)dev_ctl) + ((unsigned long)dev_inst));
	dev_blk = (struct edac_device_block *)
		(((char *)dev_ctl) + ((unsigned long)dev_blk));
	dev_attrib = (struct edac_dev_sysfs_block_attribute *)
		(((char *)dev_ctl) + ((unsigned long)dev_attrib));
	pvt = sz_private ? (((char *)dev_ctl) + ((unsigned long)pvt)) : NULL;

	/* Begin storing the information into the control info structure */
	dev_ctl->dev_idx = device_index;
	dev_ctl->nr_instances = nr_instances;
	dev_ctl->instances = dev_inst;
	dev_ctl->pvt_info = pvt;

	/* Default logging of CEs and UEs */
	dev_ctl->log_ce = 1;
	dev_ctl->log_ue = 1;

	/* Name of this edac device */
	snprintf(dev_ctl->name,sizeof(dev_ctl->name),"%s",edac_device_name);

	debugf4("%s() edac_dev=%p next after end=%p\n",
		__func__, dev_ctl, pvt + sz_private );

	/* Initialize every Instance */
	for (instance = 0; instance < nr_instances; instance++) {
		inst = &dev_inst[instance];
		inst->ctl = dev_ctl;
		inst->nr_blocks = nr_blocks;
		blk_p = &dev_blk[instance * nr_blocks];
		inst->blocks = blk_p;

		/* name of this instance */
		snprintf(inst->name, sizeof(inst->name),
			 "%s%u", edac_device_name, instance);

		/* Initialize every block in each instance */
		for (block = 0; block < nr_blocks; block++) {
			blk = &blk_p[block];
			blk->instance = inst;
			snprintf(blk->name, sizeof(blk->name),
				 "%s%d", edac_block_name, block+offset_value);

			debugf4("%s() instance=%d inst_p=%p block=#%d "
				"block_p=%p name='%s'\n",
				__func__, instance, inst, block,
				blk, blk->name);

			/* if there are NO attributes OR no attribute pointer
			 * then continue on to next block iteration
			 */
			if ((nr_attrib == 0) || (attrib_spec == NULL))
				continue;

			/* setup the attribute array for this block */
			blk->nr_attribs = nr_attrib;
			attrib_p = &dev_attrib[block*nr_instances*nr_attrib];
			blk->block_attributes = attrib_p;

			debugf4("%s() THIS BLOCK_ATTRIB=%p\n",
				__func__, blk->block_attributes);

			/* Initialize every user specified attribute in this
			 * block with the data the caller passed in
			 * Each block gets its own copy of pointers,
			 * and its unique 'value'
			 */
			for (attr = 0; attr < nr_attrib; attr++) {
				attrib = &attrib_p[attr];

				/* populate the unique per attrib
				 * with the code pointers and info
				 */
				attrib->attr = attrib_spec[attr].attr;
				attrib->show = attrib_spec[attr].show;
				attrib->store = attrib_spec[attr].store;

				attrib->block = blk;	/* up link */

				debugf4("%s() alloc-attrib=%p attrib_name='%s' "
					"attrib-spec=%p spec-name=%s\n",
					__func__, attrib, attrib->attr.name,
					&attrib_spec[attr],
					attrib_spec[attr].attr.name
					);
			}
		}
	}

	/* Mark this instance as merely ALLOCATED */
	dev_ctl->op_state = OP_ALLOC;

	/*
	 * Initialize the 'root' kobj for the edac_device controller
	 */
	err = edac_device_register_sysfs_main_kobj(dev_ctl);
	if (err) {
		kfree(dev_ctl);
		return NULL;
	}

	/* at this point, the root kobj is valid, and in order to
	 * 'free' the object, then the function:
	 *	edac_device_unregister_sysfs_main_kobj() must be called
	 * which will perform kobj unregistration and the actual free
	 * will occur during the kobject callback operation
	 */

	return dev_ctl;
}
EXPORT_SYMBOL_GPL(edac_device_alloc_ctl_info);

/*
 * edac_device_free_ctl_info()
 *	frees the memory allocated by the edac_device_alloc_ctl_info()
 *	function
 */
void edac_device_free_ctl_info(struct edac_device_ctl_info *ctl_info)
{
	edac_device_unregister_sysfs_main_kobj(ctl_info);
}
EXPORT_SYMBOL_GPL(edac_device_free_ctl_info);

/*
 * find_edac_device_by_dev
 *	scans the edac_device list for a specific 'struct device *'
 *
 *	lock to be held prior to call:	device_ctls_mutex
 *
 *	Return:
 *		pointer to control structure managing 'dev'
 *		NULL if not found on list
 */
static struct edac_device_ctl_info *find_edac_device_by_dev(struct device *dev)
{
	struct edac_device_ctl_info *edac_dev;
	struct list_head *item;

	debugf0("%s()\n", __func__);

	list_for_each(item, &edac_device_list) {
		edac_dev = list_entry(item, struct edac_device_ctl_info, link);

		if (edac_dev->dev == dev)
			return edac_dev;
	}

	return NULL;
}

/*
 * add_edac_dev_to_global_list
 *	Before calling this function, caller must
 *	assign a unique value to edac_dev->dev_idx.
 *
 *	lock to be held prior to call:	device_ctls_mutex
 *
 *	Return:
 *		0 on success
 *		1 on failure.
 */
static int add_edac_dev_to_global_list(struct edac_device_ctl_info *edac_dev)
{
	struct list_head *item, *insert_before;
	struct edac_device_ctl_info *rover;

	insert_before = &edac_device_list;

	/* Determine if already on the list */
	rover = find_edac_device_by_dev(edac_dev->dev);
	if (unlikely(rover != NULL))
		goto fail0;

	/* Insert in ascending order by 'dev_idx', so find position */
	list_for_each(item, &edac_device_list) {
		rover = list_entry(item, struct edac_device_ctl_info, link);

		if (rover->dev_idx >= edac_dev->dev_idx) {
			if (unlikely(rover->dev_idx == edac_dev->dev_idx))
				goto fail1;

			insert_before = item;
			break;
		}
	}

	list_add_tail_rcu(&edac_dev->link, insert_before);
	return 0;

fail0:
	edac_printk(KERN_WARNING, EDAC_MC,
			"%s (%s) %s %s already assigned %d\n",
			dev_name(rover->dev), edac_dev_name(rover),
			rover->mod_name, rover->ctl_name, rover->dev_idx);
	return 1;

fail1:
	edac_printk(KERN_WARNING, EDAC_MC,
			"bug in low-level driver: attempt to assign\n"
			"    duplicate dev_idx %d in %s()\n", rover->dev_idx,
			__func__);
	return 1;
}

/*
 * complete_edac_device_list_del
 *
 *	callback function when reference count is zero
 */
static void complete_edac_device_list_del(struct rcu_head *head)
{
	struct edac_device_ctl_info *edac_dev;

	edac_dev = container_of(head, struct edac_device_ctl_info, rcu);
	INIT_LIST_HEAD(&edac_dev->link);
	complete(&edac_dev->removal_complete);
}

/*
 * del_edac_device_from_global_list
 *
 *	remove the RCU, setup for a callback call,
 *	then wait for the callback to occur
 */
static void del_edac_device_from_global_list(struct edac_device_ctl_info
						*edac_device)
{
	list_del_rcu(&edac_device->link);

	init_completion(&edac_device->removal_complete);
	call_rcu(&edac_device->rcu, complete_edac_device_list_del);
	wait_for_completion(&edac_device->removal_complete);
}

/*
 * edac_device_workq_function
 *	performs the operation scheduled by a workq request
 *
 *	this workq is embedded within an edac_device_ctl_info
 *	structure, that needs to be polled for possible error events.
 *
 *	This operation is to acquire the list mutex lock
 *	(thus preventing insertation or deletion)
 *	and then call the device's poll function IFF this device is
 *	running polled and there is a poll function defined.
 */
static void edac_device_workq_function(struct work_struct *work_req)
{
	struct delayed_work *d_work = (struct delayed_work *)work_req;
	struct edac_device_ctl_info *edac_dev = to_edac_device_ctl_work(d_work);

	mutex_lock(&device_ctls_mutex);

	/* If we are being removed, bail out immediately */
	if (edac_dev->op_state == OP_OFFLINE) {
		mutex_unlock(&device_ctls_mutex);
		return;
	}

	/* Only poll controllers that are running polled and have a check */
	if ((edac_dev->op_state == OP_RUNNING_POLL) &&
		(edac_dev->edac_check != NULL)) {
			edac_dev->edac_check(edac_dev);
	}

	mutex_unlock(&device_ctls_mutex);

	/* Reschedule the workq for the next time period to start again
	 * if the number of msec is for 1 sec, then adjust to the next
	 * whole one second to save timers fireing all over the period
	 * between integral seconds
	 */
	if (edac_dev->poll_msec == 1000)
		queue_delayed_work(edac_workqueue, &edac_dev->work,
				round_jiffies_relative(edac_dev->delay));
	else
		queue_delayed_work(edac_workqueue, &edac_dev->work,
				edac_dev->delay);
}

/*
 * edac_device_workq_setup
 *	initialize a workq item for this edac_device instance
 *	passing in the new delay period in msec
 */
void edac_device_workq_setup(struct edac_device_ctl_info *edac_dev,
				unsigned msec)
{
	debugf0("%s()\n", __func__);

	/* take the arg 'msec' and set it into the control structure
	 * to used in the time period calculation
	 * then calc the number of jiffies that represents
	 */
	edac_dev->poll_msec = msec;
	edac_dev->delay = msecs_to_jiffies(msec);

	INIT_DELAYED_WORK(&edac_dev->work, edac_device_workq_function);

	/* optimize here for the 1 second case, which will be normal value, to
	 * fire ON the 1 second time event. This helps reduce all sorts of
	 * timers firing on sub-second basis, while they are happy
	 * to fire together on the 1 second exactly
	 */
	if (edac_dev->poll_msec == 1000)
		queue_delayed_work(edac_workqueue, &edac_dev->work,
				round_jiffies_relative(edac_dev->delay));
	else
		queue_delayed_work(edac_workqueue, &edac_dev->work,
				edac_dev->delay);
}

/*
 * edac_device_workq_teardown
 *	stop the workq processing on this edac_dev
 */
void edac_device_workq_teardown(struct edac_device_ctl_info *edac_dev)
{
	int status;

	status = cancel_delayed_work(&edac_dev->work);
	if (status == 0) {
		/* workq instance might be running, wait for it */
		flush_workqueue(edac_workqueue);
	}
}

/*
 * edac_device_reset_delay_period
 *
 *	need to stop any outstanding workq queued up at this time
 *	because we will be resetting the sleep time.
 *	Then restart the workq on the new delay
 */
void edac_device_reset_delay_period(struct edac_device_ctl_info *edac_dev,
					unsigned long value)
{
	/* cancel the current workq request, without the mutex lock */
	edac_device_workq_teardown(edac_dev);

	/* acquire the mutex before doing the workq setup */
	mutex_lock(&device_ctls_mutex);

	/* restart the workq request, with new delay value */
	edac_device_workq_setup(edac_dev, value);

	mutex_unlock(&device_ctls_mutex);
}

/**
 * edac_device_add_device: Insert the 'edac_dev' structure into the
 * edac_device global list and create sysfs entries associated with
 * edac_device structure.
 * @edac_device: pointer to the edac_device structure to be added to the list
 * 'edac_device' structure.
 *
 * Return:
 *	0	Success
 *	!0	Failure
 */
int edac_device_add_device(struct edac_device_ctl_info *edac_dev)
{
	debugf0("%s()\n", __func__);

#ifdef CONFIG_EDAC_DEBUG
	if (edac_debug_level >= 3)
		edac_device_dump_device(edac_dev);
#endif
	mutex_lock(&device_ctls_mutex);

	if (add_edac_dev_to_global_list(edac_dev))
		goto fail0;

	/* set load time so that error rate can be tracked */
	edac_dev->start_time = jiffies;

	/* create this instance's sysfs entries */
	if (edac_device_create_sysfs(edac_dev)) {
		edac_device_printk(edac_dev, KERN_WARNING,
					"failed to create sysfs device\n");
		goto fail1;
	}

	/* If there IS a check routine, then we are running POLLED */
	if (edac_dev->edac_check != NULL) {
		/* This instance is NOW RUNNING */
		edac_dev->op_state = OP_RUNNING_POLL;

		/*
		 * enable workq processing on this instance,
		 * default = 1000 msec
		 */
		edac_device_workq_setup(edac_dev, 1000);
	} else {
		edac_dev->op_state = OP_RUNNING_INTERRUPT;
	}

	/* Report action taken */
	edac_device_printk(edac_dev, KERN_INFO,
				"Giving out device to module '%s' controller "
				"'%s': DEV '%s' (%s)\n",
				edac_dev->mod_name,
				edac_dev->ctl_name,
				edac_dev_name(edac_dev),
				edac_op_state_to_string(edac_dev->op_state));

	mutex_unlock(&device_ctls_mutex);
	return 0;

fail1:
	/* Some error, so remove the entry from the lsit */
	del_edac_device_from_global_list(edac_dev);

fail0:
	mutex_unlock(&device_ctls_mutex);
	return 1;
}
EXPORT_SYMBOL_GPL(edac_device_add_device);

/**
 * edac_device_del_device:
 *	Remove sysfs entries for specified edac_device structure and
 *	then remove edac_device structure from global list
 *
 * @pdev:
 *	Pointer to 'struct device' representing edac_device
 *	structure to remove.
 *
 * Return:
 *	Pointer to removed edac_device structure,
 *	OR NULL if device not found.
 */
struct edac_device_ctl_info *edac_device_del_device(struct device *dev)
{
	struct edac_device_ctl_info *edac_dev;

	debugf0("%s()\n", __func__);

	mutex_lock(&device_ctls_mutex);

	/* Find the structure on the list, if not there, then leave */
	edac_dev = find_edac_device_by_dev(dev);
	if (edac_dev == NULL) {
		mutex_unlock(&device_ctls_mutex);
		return NULL;
	}

	/* mark this instance as OFFLINE */
	edac_dev->op_state = OP_OFFLINE;

	/* deregister from global list */
	del_edac_device_from_global_list(edac_dev);

	mutex_unlock(&device_ctls_mutex);

	/* clear workq processing on this instance */
	edac_device_workq_teardown(edac_dev);

	/* Tear down the sysfs entries for this instance */
	edac_device_remove_sysfs(edac_dev);

	edac_printk(KERN_INFO, EDAC_MC,
		"Removed device %d for %s %s: DEV %s\n",
		edac_dev->dev_idx,
		edac_dev->mod_name, edac_dev->ctl_name, edac_dev_name(edac_dev));

	return edac_dev;
}
EXPORT_SYMBOL_GPL(edac_device_del_device);

static inline int edac_device_get_log_ce(struct edac_device_ctl_info *edac_dev)
{
	return edac_dev->log_ce;
}

static inline int edac_device_get_log_ue(struct edac_device_ctl_info *edac_dev)
{
	return edac_dev->log_ue;
}

static inline int edac_device_get_panic_on_ue(struct edac_device_ctl_info
					*edac_dev)
{
	return edac_dev->panic_on_ue;
}

/*
 * edac_device_handle_ce
 *	perform a common output and handling of an 'edac_dev' CE event
 */
void edac_device_handle_ce(struct edac_device_ctl_info *edac_dev,
			int inst_nr, int block_nr, const char *msg)
{
	struct edac_device_instance *instance;
	struct edac_device_block *block = NULL;

	if ((inst_nr >= edac_dev->nr_instances) || (inst_nr < 0)) {
		edac_device_printk(edac_dev, KERN_ERR,
				"INTERNAL ERROR: 'instance' out of range "
				"(%d >= %d)\n", inst_nr,
				edac_dev->nr_instances);
		return;
	}

	instance = edac_dev->instances + inst_nr;

	if ((block_nr >= instance->nr_blocks) || (block_nr < 0)) {
		edac_device_printk(edac_dev, KERN_ERR,
				"INTERNAL ERROR: instance %d 'block' "
				"out of range (%d >= %d)\n",
				inst_nr, block_nr,
				instance->nr_blocks);
		return;
	}

	if (instance->nr_blocks > 0) {
		block = instance->blocks + block_nr;
		block->counters.ce_count++;
	}

	/* Propogate the count up the 'totals' tree */
	instance->counters.ce_count++;
	edac_dev->counters.ce_count++;

	if (edac_device_get_log_ce(edac_dev))
		edac_device_printk(edac_dev, KERN_WARNING,
				"CE: %s instance: %s block: %s '%s'\n",
				edac_dev->ctl_name, instance->name,
				block ? block->name : "N/A", msg);
}
EXPORT_SYMBOL_GPL(edac_device_handle_ce);

/*
 * edac_device_handle_ue
 *	perform a common output and handling of an 'edac_dev' UE event
 */
void edac_device_handle_ue(struct edac_device_ctl_info *edac_dev,
			int inst_nr, int block_nr, const char *msg)
{
	struct edac_device_instance *instance;
	struct edac_device_block *block = NULL;

	if ((inst_nr >= edac_dev->nr_instances) || (inst_nr < 0)) {
		edac_device_printk(edac_dev, KERN_ERR,
				"INTERNAL ERROR: 'instance' out of range "
				"(%d >= %d)\n", inst_nr,
				edac_dev->nr_instances);
		return;
	}

	instance = edac_dev->instances + inst_nr;

	if ((block_nr >= instance->nr_blocks) || (block_nr < 0)) {
		edac_device_printk(edac_dev, KERN_ERR,
				"INTERNAL ERROR: instance %d 'block' "
				"out of range (%d >= %d)\n",
				inst_nr, block_nr,
				instance->nr_blocks);
		return;
	}

	if (instance->nr_blocks > 0) {
		block = instance->blocks + block_nr;
		block->counters.ue_count++;
	}

	/* Propogate the count up the 'totals' tree */
	instance->counters.ue_count++;
	edac_dev->counters.ue_count++;

	if (edac_device_get_log_ue(edac_dev))
		edac_device_printk(edac_dev, KERN_EMERG,
				"UE: %s instance: %s block: %s '%s'\n",
				edac_dev->ctl_name, instance->name,
				block ? block->name : "N/A", msg);

	if (edac_device_get_panic_on_ue(edac_dev))
		panic("EDAC %s: UE instance: %s block %s '%s'\n",
			edac_dev->ctl_name, instance->name,
			block ? block->name : "N/A", msg);
}
EXPORT_SYMBOL_GPL(edac_device_handle_ue);