1
2 /*
3 * edac_device.c
4 * (C) 2007 www.douglaskthompson.com
5 *
6 * This file may be distributed under the terms of the
7 * GNU General Public License.
8 *
9 * Written by Doug Thompson <norsk5@xmission.com>
10 *
11 * edac_device API implementation
12 * 19 Jan 2007
13 */
14
15 #include <linux/module.h>
16 #include <linux/types.h>
17 #include <linux/smp.h>
18 #include <linux/init.h>
19 #include <linux/sysctl.h>
20 #include <linux/highmem.h>
21 #include <linux/timer.h>
22 #include <linux/slab.h>
23 #include <linux/jiffies.h>
24 #include <linux/spinlock.h>
25 #include <linux/list.h>
26 #include <linux/sysdev.h>
27 #include <linux/ctype.h>
28 #include <linux/workqueue.h>
29 #include <asm/uaccess.h>
30 #include <asm/page.h>
31
32 #include "edac_core.h"
33 #include "edac_module.h"
34
35 /* lock for the list: 'edac_device_list', manipulation of this list
36 * is protected by the 'device_ctls_mutex' lock
37 */
38 static DEFINE_MUTEX(device_ctls_mutex);
39 static LIST_HEAD(edac_device_list);
40
41 #ifdef CONFIG_EDAC_DEBUG
42 static void edac_device_dump_device(struct edac_device_ctl_info *edac_dev)
43 {
44 debugf3("\tedac_dev = %p dev_idx=%d \n", edac_dev, edac_dev->dev_idx);
45 debugf4("\tedac_dev->edac_check = %p\n", edac_dev->edac_check);
46 debugf3("\tdev = %p\n", edac_dev->dev);
47 debugf3("\tmod_name:ctl_name = %s:%s\n",
48 edac_dev->mod_name, edac_dev->ctl_name);
49 debugf3("\tpvt_info = %p\n\n", edac_dev->pvt_info);
50 }
51 #endif /* CONFIG_EDAC_DEBUG */
52
53
54 /*
55 * edac_device_alloc_ctl_info()
56 * Allocate a new edac device control info structure
57 *
58 * The control structure is allocated in complete chunk
59 * from the OS. It is in turn sub allocated to the
60 * various objects that compose the struture
61 *
62 * The structure has a 'nr_instance' array within itself.
63 * Each instance represents a major component
64 * Example: L1 cache and L2 cache are 2 instance components
65 *
66 * Within each instance is an array of 'nr_blocks' blockoffsets
67 */
68 struct edac_device_ctl_info *edac_device_alloc_ctl_info(
69 unsigned sz_private,
70 char *edac_device_name, unsigned nr_instances,
71 char *edac_block_name, unsigned nr_blocks,
72 unsigned offset_value, /* zero, 1, or other based offset */
73 struct edac_dev_sysfs_block_attribute *attrib_spec, unsigned nr_attrib,
74 int device_index)
75 {
76 struct edac_device_ctl_info *dev_ctl;
77 struct edac_device_instance *dev_inst, *inst;
78 struct edac_device_block *dev_blk, *blk_p, *blk;
79 struct edac_dev_sysfs_block_attribute *dev_attrib, *attrib_p, *attrib;
80 unsigned total_size;
81 unsigned count;
82 unsigned instance, block, attr;
83 void *pvt;
84 int err;
85
86 debugf4("%s() instances=%d blocks=%d\n",
87 __func__, nr_instances, nr_blocks);
88
89 /* Calculate the size of memory we need to allocate AND
90 * determine the offsets of the various item arrays
91 * (instance,block,attrib) from the start of an allocated structure.
92 * We want the alignment of each item (instance,block,attrib)
93 * to be at least as stringent as what the compiler would
94 * provide if we could simply hardcode everything into a single struct.
95 */
96 dev_ctl = (struct edac_device_ctl_info *)NULL;
97
98 /* Calc the 'end' offset past end of ONE ctl_info structure
99 * which will become the start of the 'instance' array
100 */
101 dev_inst = edac_align_ptr(&dev_ctl[1], sizeof(*dev_inst));
102
103 /* Calc the 'end' offset past the instance array within the ctl_info
104 * which will become the start of the block array
105 */
106 dev_blk = edac_align_ptr(&dev_inst[nr_instances], sizeof(*dev_blk));
107
108 /* Calc the 'end' offset past the dev_blk array
109 * which will become the start of the attrib array, if any.
110 */
111 count = nr_instances * nr_blocks;
112 dev_attrib = edac_align_ptr(&dev_blk[count], sizeof(*dev_attrib));
113
114 /* Check for case of when an attribute array is specified */
115 if (nr_attrib > 0) {
116 /* calc how many nr_attrib we need */
117 count *= nr_attrib;
118
119 /* Calc the 'end' offset past the attributes array */
120 pvt = edac_align_ptr(&dev_attrib[count], sz_private);
121 } else {
122 /* no attribute array specificed */
123 pvt = edac_align_ptr(dev_attrib, sz_private);
124 }
125
126 /* 'pvt' now points to where the private data area is.
127 * At this point 'pvt' (like dev_inst,dev_blk and dev_attrib)
128 * is baselined at ZERO
129 */
130 total_size = ((unsigned long)pvt) + sz_private;
131
132 /* Allocate the amount of memory for the set of control structures */
133 dev_ctl = kzalloc(total_size, GFP_KERNEL);
134 if (dev_ctl == NULL)
135 return NULL;
136
137 /* Adjust pointers so they point within the actual memory we
138 * just allocated rather than an imaginary chunk of memory
139 * located at address 0.
140 * 'dev_ctl' points to REAL memory, while the others are
141 * ZERO based and thus need to be adjusted to point within
142 * the allocated memory.
143 */
144 dev_inst = (struct edac_device_instance *)
145 (((char *)dev_ctl) + ((unsigned long)dev_inst));
146 dev_blk = (struct edac_device_block *)
147 (((char *)dev_ctl) + ((unsigned long)dev_blk));
148 dev_attrib = (struct edac_dev_sysfs_block_attribute *)
149 (((char *)dev_ctl) + ((unsigned long)dev_attrib));
150 pvt = sz_private ? (((char *)dev_ctl) + ((unsigned long)pvt)) : NULL;
151
152 /* Begin storing the information into the control info structure */
153 dev_ctl->dev_idx = device_index;
154 dev_ctl->nr_instances = nr_instances;
155 dev_ctl->instances = dev_inst;
156 dev_ctl->pvt_info = pvt;
157
158 /* Default logging of CEs and UEs */
159 dev_ctl->log_ce = 1;
160 dev_ctl->log_ue = 1;
161
162 /* Name of this edac device */
163 snprintf(dev_ctl->name,sizeof(dev_ctl->name),"%s",edac_device_name);
164
165 debugf4("%s() edac_dev=%p next after end=%p\n",
166 __func__, dev_ctl, pvt + sz_private );
167
168 /* Initialize every Instance */
169 for (instance = 0; instance < nr_instances; instance++) {
170 inst = &dev_inst[instance];
171 inst->ctl = dev_ctl;
172 inst->nr_blocks = nr_blocks;
173 blk_p = &dev_blk[instance * nr_blocks];
174 inst->blocks = blk_p;
175
176 /* name of this instance */
177 snprintf(inst->name, sizeof(inst->name),
178 "%s%u", edac_device_name, instance);
179
180 /* Initialize every block in each instance */
181 for (block = 0; block < nr_blocks; block++) {
182 blk = &blk_p[block];
183 blk->instance = inst;
184 snprintf(blk->name, sizeof(blk->name),
185 "%s%d", edac_block_name, block+offset_value);
186
187 debugf4("%s() instance=%d inst_p=%p block=#%d "
188 "block_p=%p name='%s'\n",
189 __func__, instance, inst, block,
190 blk, blk->name);
191
192 /* if there are NO attributes OR no attribute pointer
193 * then continue on to next block iteration
194 */
195 if ((nr_attrib == 0) || (attrib_spec == NULL))
196 continue;
197
198 /* setup the attribute array for this block */
199 blk->nr_attribs = nr_attrib;
200 attrib_p = &dev_attrib[block*nr_instances*nr_attrib];
201 blk->block_attributes = attrib_p;
202
203 debugf4("%s() THIS BLOCK_ATTRIB=%p\n",
204 __func__, blk->block_attributes);
205
206 /* Initialize every user specified attribute in this
207 * block with the data the caller passed in
208 * Each block gets its own copy of pointers,
209 * and its unique 'value'
210 */
211 for (attr = 0; attr < nr_attrib; attr++) {
212 attrib = &attrib_p[attr];
213
214 /* populate the unique per attrib
215 * with the code pointers and info
216 */
217 attrib->attr = attrib_spec[attr].attr;
218 attrib->show = attrib_spec[attr].show;
219 attrib->store = attrib_spec[attr].store;
220
221 attrib->block = blk; /* up link */
222
223 debugf4("%s() alloc-attrib=%p attrib_name='%s' "
224 "attrib-spec=%p spec-name=%s\n",
225 __func__, attrib, attrib->attr.name,
226 &attrib_spec[attr],
227 attrib_spec[attr].attr.name
228 );
229 }
230 }
231 }
232
233 /* Mark this instance as merely ALLOCATED */
234 dev_ctl->op_state = OP_ALLOC;
235
236 /*
237 * Initialize the 'root' kobj for the edac_device controller
238 */
239 err = edac_device_register_sysfs_main_kobj(dev_ctl);
240 if (err) {
241 kfree(dev_ctl);
242 return NULL;
243 }
244
245 /* at this point, the root kobj is valid, and in order to
246 * 'free' the object, then the function:
247 * edac_device_unregister_sysfs_main_kobj() must be called
248 * which will perform kobj unregistration and the actual free
249 * will occur during the kobject callback operation
250 */
251
252 return dev_ctl;
253 }
254 EXPORT_SYMBOL_GPL(edac_device_alloc_ctl_info);
255
256 /*
257 * edac_device_free_ctl_info()
258 * frees the memory allocated by the edac_device_alloc_ctl_info()
259 * function
260 */
261 void edac_device_free_ctl_info(struct edac_device_ctl_info *ctl_info)
262 {
263 edac_device_unregister_sysfs_main_kobj(ctl_info);
264 }
265 EXPORT_SYMBOL_GPL(edac_device_free_ctl_info);
266
267 /*
268 * find_edac_device_by_dev
269 * scans the edac_device list for a specific 'struct device *'
270 *
271 * lock to be held prior to call: device_ctls_mutex
272 *
273 * Return:
274 * pointer to control structure managing 'dev'
275 * NULL if not found on list
276 */
277 static struct edac_device_ctl_info *find_edac_device_by_dev(struct device *dev)
278 {
279 struct edac_device_ctl_info *edac_dev;
280 struct list_head *item;
281
282 debugf0("%s()\n", __func__);
283
284 list_for_each(item, &edac_device_list) {
285 edac_dev = list_entry(item, struct edac_device_ctl_info, link);
286
287 if (edac_dev->dev == dev)
288 return edac_dev;
289 }
290
291 return NULL;
292 }
293
294 /*
295 * add_edac_dev_to_global_list
296 * Before calling this function, caller must
297 * assign a unique value to edac_dev->dev_idx.
298 *
299 * lock to be held prior to call: device_ctls_mutex
300 *
301 * Return:
302 * 0 on success
303 * 1 on failure.
304 */
305 static int add_edac_dev_to_global_list(struct edac_device_ctl_info *edac_dev)
306 {
307 struct list_head *item, *insert_before;
308 struct edac_device_ctl_info *rover;
309
310 insert_before = &edac_device_list;
311
312 /* Determine if already on the list */
313 rover = find_edac_device_by_dev(edac_dev->dev);
314 if (unlikely(rover != NULL))
315 goto fail0;
316
317 /* Insert in ascending order by 'dev_idx', so find position */
318 list_for_each(item, &edac_device_list) {
319 rover = list_entry(item, struct edac_device_ctl_info, link);
320
321 if (rover->dev_idx >= edac_dev->dev_idx) {
322 if (unlikely(rover->dev_idx == edac_dev->dev_idx))
323 goto fail1;
324
325 insert_before = item;
326 break;
327 }
328 }
329
330 list_add_tail_rcu(&edac_dev->link, insert_before);
331 return 0;
332
333 fail0:
334 edac_printk(KERN_WARNING, EDAC_MC,
335 "%s (%s) %s %s already assigned %d\n",
336 dev_name(rover->dev), edac_dev_name(rover),
337 rover->mod_name, rover->ctl_name, rover->dev_idx);
338 return 1;
339
340 fail1:
341 edac_printk(KERN_WARNING, EDAC_MC,
342 "bug in low-level driver: attempt to assign\n"
343 " duplicate dev_idx %d in %s()\n", rover->dev_idx,
344 __func__);
345 return 1;
346 }
347
348 /*
349 * complete_edac_device_list_del
350 *
351 * callback function when reference count is zero
352 */
353 static void complete_edac_device_list_del(struct rcu_head *head)
354 {
355 struct edac_device_ctl_info *edac_dev;
356
357 edac_dev = container_of(head, struct edac_device_ctl_info, rcu);
358 INIT_LIST_HEAD(&edac_dev->link);
359 complete(&edac_dev->removal_complete);
360 }
361
362 /*
363 * del_edac_device_from_global_list
364 *
365 * remove the RCU, setup for a callback call,
366 * then wait for the callback to occur
367 */
368 static void del_edac_device_from_global_list(struct edac_device_ctl_info
369 *edac_device)
370 {
371 list_del_rcu(&edac_device->link);
372
373 init_completion(&edac_device->removal_complete);
374 call_rcu(&edac_device->rcu, complete_edac_device_list_del);
375 wait_for_completion(&edac_device->removal_complete);
376 }
377
378 /*
379 * edac_device_workq_function
380 * performs the operation scheduled by a workq request
381 *
382 * this workq is embedded within an edac_device_ctl_info
383 * structure, that needs to be polled for possible error events.
384 *
385 * This operation is to acquire the list mutex lock
386 * (thus preventing insertation or deletion)
387 * and then call the device's poll function IFF this device is
388 * running polled and there is a poll function defined.
389 */
390 static void edac_device_workq_function(struct work_struct *work_req)
391 {
392 struct delayed_work *d_work = to_delayed_work(work_req);
393 struct edac_device_ctl_info *edac_dev = to_edac_device_ctl_work(d_work);
394
395 mutex_lock(&device_ctls_mutex);
396
397 /* If we are being removed, bail out immediately */
398 if (edac_dev->op_state == OP_OFFLINE) {
399 mutex_unlock(&device_ctls_mutex);
400 return;
401 }
402
403 /* Only poll controllers that are running polled and have a check */
404 if ((edac_dev->op_state == OP_RUNNING_POLL) &&
405 (edac_dev->edac_check != NULL)) {
406 edac_dev->edac_check(edac_dev);
407 }
408
409 mutex_unlock(&device_ctls_mutex);
410
411 /* Reschedule the workq for the next time period to start again
412 * if the number of msec is for 1 sec, then adjust to the next
413 * whole one second to save timers fireing all over the period
414 * between integral seconds
415 */
416 if (edac_dev->poll_msec == 1000)
417 queue_delayed_work(edac_workqueue, &edac_dev->work,
418 round_jiffies_relative(edac_dev->delay));
419 else
420 queue_delayed_work(edac_workqueue, &edac_dev->work,
421 edac_dev->delay);
422 }
423
424 /*
425 * edac_device_workq_setup
426 * initialize a workq item for this edac_device instance
427 * passing in the new delay period in msec
428 */
429 void edac_device_workq_setup(struct edac_device_ctl_info *edac_dev,
430 unsigned msec)
431 {
432 debugf0("%s()\n", __func__);
433
434 /* take the arg 'msec' and set it into the control structure
435 * to used in the time period calculation
436 * then calc the number of jiffies that represents
437 */
438 edac_dev->poll_msec = msec;
439 edac_dev->delay = msecs_to_jiffies(msec);
440
441 INIT_DELAYED_WORK(&edac_dev->work, edac_device_workq_function);
442
443 /* optimize here for the 1 second case, which will be normal value, to
444 * fire ON the 1 second time event. This helps reduce all sorts of
445 * timers firing on sub-second basis, while they are happy
446 * to fire together on the 1 second exactly
447 */
448 if (edac_dev->poll_msec == 1000)
449 queue_delayed_work(edac_workqueue, &edac_dev->work,
450 round_jiffies_relative(edac_dev->delay));
451 else
452 queue_delayed_work(edac_workqueue, &edac_dev->work,
453 edac_dev->delay);
454 }
455
456 /*
457 * edac_device_workq_teardown
458 * stop the workq processing on this edac_dev
459 */
460 void edac_device_workq_teardown(struct edac_device_ctl_info *edac_dev)
461 {
462 int status;
463
464 status = cancel_delayed_work(&edac_dev->work);
465 if (status == 0) {
466 /* workq instance might be running, wait for it */
467 flush_workqueue(edac_workqueue);
468 }
469 }
470
471 /*
472 * edac_device_reset_delay_period
473 *
474 * need to stop any outstanding workq queued up at this time
475 * because we will be resetting the sleep time.
476 * Then restart the workq on the new delay
477 */
478 void edac_device_reset_delay_period(struct edac_device_ctl_info *edac_dev,
479 unsigned long value)
480 {
481 /* cancel the current workq request, without the mutex lock */
482 edac_device_workq_teardown(edac_dev);
483
484 /* acquire the mutex before doing the workq setup */
485 mutex_lock(&device_ctls_mutex);
486
487 /* restart the workq request, with new delay value */
488 edac_device_workq_setup(edac_dev, value);
489
490 mutex_unlock(&device_ctls_mutex);
491 }
492
493 /*
494 * edac_device_alloc_index: Allocate a unique device index number
495 *
496 * Return:
497 * allocated index number
498 */
499 int edac_device_alloc_index(void)
500 {
501 static atomic_t device_indexes = ATOMIC_INIT(0);
502
503 return atomic_inc_return(&device_indexes) - 1;
504 }
505 EXPORT_SYMBOL_GPL(edac_device_alloc_index);
506
507 /**
508 * edac_device_add_device: Insert the 'edac_dev' structure into the
509 * edac_device global list and create sysfs entries associated with
510 * edac_device structure.
511 * @edac_device: pointer to the edac_device structure to be added to the list
512 * 'edac_device' structure.
513 *
514 * Return:
515 * 0 Success
516 * !0 Failure
517 */
518 int edac_device_add_device(struct edac_device_ctl_info *edac_dev)
519 {
520 debugf0("%s()\n", __func__);
521
522 #ifdef CONFIG_EDAC_DEBUG
523 if (edac_debug_level >= 3)
524 edac_device_dump_device(edac_dev);
525 #endif
526 mutex_lock(&device_ctls_mutex);
527
528 if (add_edac_dev_to_global_list(edac_dev))
529 goto fail0;
530
531 /* set load time so that error rate can be tracked */
532 edac_dev->start_time = jiffies;
533
534 /* create this instance's sysfs entries */
535 if (edac_device_create_sysfs(edac_dev)) {
536 edac_device_printk(edac_dev, KERN_WARNING,
537 "failed to create sysfs device\n");
538 goto fail1;
539 }
540
541 /* If there IS a check routine, then we are running POLLED */
542 if (edac_dev->edac_check != NULL) {
543 /* This instance is NOW RUNNING */
544 edac_dev->op_state = OP_RUNNING_POLL;
545
546 /*
547 * enable workq processing on this instance,
548 * default = 1000 msec
549 */
550 edac_device_workq_setup(edac_dev, 1000);
551 } else {
552 edac_dev->op_state = OP_RUNNING_INTERRUPT;
553 }
554
555 /* Report action taken */
556 edac_device_printk(edac_dev, KERN_INFO,
557 "Giving out device to module '%s' controller "
558 "'%s': DEV '%s' (%s)\n",
559 edac_dev->mod_name,
560 edac_dev->ctl_name,
561 edac_dev_name(edac_dev),
562 edac_op_state_to_string(edac_dev->op_state));
563
564 mutex_unlock(&device_ctls_mutex);
565 return 0;
566
567 fail1:
568 /* Some error, so remove the entry from the lsit */
569 del_edac_device_from_global_list(edac_dev);
570
571 fail0:
572 mutex_unlock(&device_ctls_mutex);
573 return 1;
574 }
575 EXPORT_SYMBOL_GPL(edac_device_add_device);
576
577 /**
578 * edac_device_del_device:
579 * Remove sysfs entries for specified edac_device structure and
580 * then remove edac_device structure from global list
581 *
582 * @pdev:
583 * Pointer to 'struct device' representing edac_device
584 * structure to remove.
585 *
586 * Return:
587 * Pointer to removed edac_device structure,
588 * OR NULL if device not found.
589 */
590 struct edac_device_ctl_info *edac_device_del_device(struct device *dev)
591 {
592 struct edac_device_ctl_info *edac_dev;
593
594 debugf0("%s()\n", __func__);
595
596 mutex_lock(&device_ctls_mutex);
597
598 /* Find the structure on the list, if not there, then leave */
599 edac_dev = find_edac_device_by_dev(dev);
600 if (edac_dev == NULL) {
601 mutex_unlock(&device_ctls_mutex);
602 return NULL;
603 }
604
605 /* mark this instance as OFFLINE */
606 edac_dev->op_state = OP_OFFLINE;
607
608 /* deregister from global list */
609 del_edac_device_from_global_list(edac_dev);
610
611 mutex_unlock(&device_ctls_mutex);
612
613 /* clear workq processing on this instance */
614 edac_device_workq_teardown(edac_dev);
615
616 /* Tear down the sysfs entries for this instance */
617 edac_device_remove_sysfs(edac_dev);
618
619 edac_printk(KERN_INFO, EDAC_MC,
620 "Removed device %d for %s %s: DEV %s\n",
621 edac_dev->dev_idx,
622 edac_dev->mod_name, edac_dev->ctl_name, edac_dev_name(edac_dev));
623
624 return edac_dev;
625 }
626 EXPORT_SYMBOL_GPL(edac_device_del_device);
627
628 static inline int edac_device_get_log_ce(struct edac_device_ctl_info *edac_dev)
629 {
630 return edac_dev->log_ce;
631 }
632
633 static inline int edac_device_get_log_ue(struct edac_device_ctl_info *edac_dev)
634 {
635 return edac_dev->log_ue;
636 }
637
638 static inline int edac_device_get_panic_on_ue(struct edac_device_ctl_info
639 *edac_dev)
640 {
641 return edac_dev->panic_on_ue;
642 }
643
644 /*
645 * edac_device_handle_ce
646 * perform a common output and handling of an 'edac_dev' CE event
647 */
648 void edac_device_handle_ce(struct edac_device_ctl_info *edac_dev,
649 int inst_nr, int block_nr, const char *msg)
650 {
651 struct edac_device_instance *instance;
652 struct edac_device_block *block = NULL;
653
654 if ((inst_nr >= edac_dev->nr_instances) || (inst_nr < 0)) {
655 edac_device_printk(edac_dev, KERN_ERR,
656 "INTERNAL ERROR: 'instance' out of range "
657 "(%d >= %d)\n", inst_nr,
658 edac_dev->nr_instances);
659 return;
660 }
661
662 instance = edac_dev->instances + inst_nr;
663
664 if ((block_nr >= instance->nr_blocks) || (block_nr < 0)) {
665 edac_device_printk(edac_dev, KERN_ERR,
666 "INTERNAL ERROR: instance %d 'block' "
667 "out of range (%d >= %d)\n",
668 inst_nr, block_nr,
669 instance->nr_blocks);
670 return;
671 }
672
673 if (instance->nr_blocks > 0) {
674 block = instance->blocks + block_nr;
675 block->counters.ce_count++;
676 }
677
678 /* Propogate the count up the 'totals' tree */
679 instance->counters.ce_count++;
680 edac_dev->counters.ce_count++;
681
682 if (edac_device_get_log_ce(edac_dev))
683 edac_device_printk(edac_dev, KERN_WARNING,
684 "CE: %s instance: %s block: %s '%s'\n",
685 edac_dev->ctl_name, instance->name,
686 block ? block->name : "N/A", msg);
687 }
688 EXPORT_SYMBOL_GPL(edac_device_handle_ce);
689
690 /*
691 * edac_device_handle_ue
692 * perform a common output and handling of an 'edac_dev' UE event
693 */
694 void edac_device_handle_ue(struct edac_device_ctl_info *edac_dev,
695 int inst_nr, int block_nr, const char *msg)
696 {
697 struct edac_device_instance *instance;
698 struct edac_device_block *block = NULL;
699
700 if ((inst_nr >= edac_dev->nr_instances) || (inst_nr < 0)) {
701 edac_device_printk(edac_dev, KERN_ERR,
702 "INTERNAL ERROR: 'instance' out of range "
703 "(%d >= %d)\n", inst_nr,
704 edac_dev->nr_instances);
705 return;
706 }
707
708 instance = edac_dev->instances + inst_nr;
709
710 if ((block_nr >= instance->nr_blocks) || (block_nr < 0)) {
711 edac_device_printk(edac_dev, KERN_ERR,
712 "INTERNAL ERROR: instance %d 'block' "
713 "out of range (%d >= %d)\n",
714 inst_nr, block_nr,
715 instance->nr_blocks);
716 return;
717 }
718
719 if (instance->nr_blocks > 0) {
720 block = instance->blocks + block_nr;
721 block->counters.ue_count++;
722 }
723
724 /* Propogate the count up the 'totals' tree */
725 instance->counters.ue_count++;
726 edac_dev->counters.ue_count++;
727
728 if (edac_device_get_log_ue(edac_dev))
729 edac_device_printk(edac_dev, KERN_EMERG,
730 "UE: %s instance: %s block: %s '%s'\n",
731 edac_dev->ctl_name, instance->name,
732 block ? block->name : "N/A", msg);
733
734 if (edac_device_get_panic_on_ue(edac_dev))
735 panic("EDAC %s: UE instance: %s block %s '%s'\n",
736 edac_dev->ctl_name, instance->name,
737 block ? block->name : "N/A", msg);
738 }
739 EXPORT_SYMBOL_GPL(edac_device_handle_ue);
740
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