1
2
3
4
5
6
7
8
9
10
11
12
13
14
15#include <linux/ctype.h>
16#include <linux/slab.h>
17#include <linux/edac.h>
18#include <linux/bug.h>
19#include <linux/pm_runtime.h>
20#include <linux/uaccess.h>
21
22#include "edac_mc.h"
23#include "edac_module.h"
24
25
26static int edac_mc_log_ue = 1;
27static int edac_mc_log_ce = 1;
28static int edac_mc_panic_on_ue;
29static unsigned int edac_mc_poll_msec = 1000;
30
31
32int edac_mc_get_log_ue(void)
33{
34 return edac_mc_log_ue;
35}
36
37int edac_mc_get_log_ce(void)
38{
39 return edac_mc_log_ce;
40}
41
42int edac_mc_get_panic_on_ue(void)
43{
44 return edac_mc_panic_on_ue;
45}
46
47
48unsigned int edac_mc_get_poll_msec(void)
49{
50 return edac_mc_poll_msec;
51}
52
53static int edac_set_poll_msec(const char *val, const struct kernel_param *kp)
54{
55 unsigned int i;
56 int ret;
57
58 if (!val)
59 return -EINVAL;
60
61 ret = kstrtouint(val, 0, &i);
62 if (ret)
63 return ret;
64
65 if (i < 1000)
66 return -EINVAL;
67
68 *((unsigned int *)kp->arg) = i;
69
70
71 edac_mc_reset_delay_period(i);
72
73 return 0;
74}
75
76
77module_param(edac_mc_panic_on_ue, int, 0644);
78MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
79module_param(edac_mc_log_ue, int, 0644);
80MODULE_PARM_DESC(edac_mc_log_ue,
81 "Log uncorrectable error to console: 0=off 1=on");
82module_param(edac_mc_log_ce, int, 0644);
83MODULE_PARM_DESC(edac_mc_log_ce,
84 "Log correctable error to console: 0=off 1=on");
85module_param_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_uint,
86 &edac_mc_poll_msec, 0644);
87MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
88
89static struct device *mci_pdev;
90
91
92
93
94static const char * const dev_types[] = {
95 [DEV_UNKNOWN] = "Unknown",
96 [DEV_X1] = "x1",
97 [DEV_X2] = "x2",
98 [DEV_X4] = "x4",
99 [DEV_X8] = "x8",
100 [DEV_X16] = "x16",
101 [DEV_X32] = "x32",
102 [DEV_X64] = "x64"
103};
104
105static const char * const edac_caps[] = {
106 [EDAC_UNKNOWN] = "Unknown",
107 [EDAC_NONE] = "None",
108 [EDAC_RESERVED] = "Reserved",
109 [EDAC_PARITY] = "PARITY",
110 [EDAC_EC] = "EC",
111 [EDAC_SECDED] = "SECDED",
112 [EDAC_S2ECD2ED] = "S2ECD2ED",
113 [EDAC_S4ECD4ED] = "S4ECD4ED",
114 [EDAC_S8ECD8ED] = "S8ECD8ED",
115 [EDAC_S16ECD16ED] = "S16ECD16ED"
116};
117
118#ifdef CONFIG_EDAC_LEGACY_SYSFS
119
120
121
122
123#define to_csrow(k) container_of(k, struct csrow_info, dev)
124
125
126
127
128
129#define DEVICE_ATTR_LEGACY(_name, _mode, _show, _store) \
130 static struct device_attribute dev_attr_legacy_##_name = __ATTR(_name, _mode, _show, _store)
131
132struct dev_ch_attribute {
133 struct device_attribute attr;
134 unsigned int channel;
135};
136
137#define DEVICE_CHANNEL(_name, _mode, _show, _store, _var) \
138 static struct dev_ch_attribute dev_attr_legacy_##_name = \
139 { __ATTR(_name, _mode, _show, _store), (_var) }
140
141#define to_channel(k) (container_of(k, struct dev_ch_attribute, attr)->channel)
142
143
144static ssize_t csrow_ue_count_show(struct device *dev,
145 struct device_attribute *mattr, char *data)
146{
147 struct csrow_info *csrow = to_csrow(dev);
148
149 return sprintf(data, "%u\n", csrow->ue_count);
150}
151
152static ssize_t csrow_ce_count_show(struct device *dev,
153 struct device_attribute *mattr, char *data)
154{
155 struct csrow_info *csrow = to_csrow(dev);
156
157 return sprintf(data, "%u\n", csrow->ce_count);
158}
159
160static ssize_t csrow_size_show(struct device *dev,
161 struct device_attribute *mattr, char *data)
162{
163 struct csrow_info *csrow = to_csrow(dev);
164 int i;
165 u32 nr_pages = 0;
166
167 for (i = 0; i < csrow->nr_channels; i++)
168 nr_pages += csrow->channels[i]->dimm->nr_pages;
169 return sprintf(data, "%u\n", PAGES_TO_MiB(nr_pages));
170}
171
172static ssize_t csrow_mem_type_show(struct device *dev,
173 struct device_attribute *mattr, char *data)
174{
175 struct csrow_info *csrow = to_csrow(dev);
176
177 return sprintf(data, "%s\n", edac_mem_types[csrow->channels[0]->dimm->mtype]);
178}
179
180static ssize_t csrow_dev_type_show(struct device *dev,
181 struct device_attribute *mattr, char *data)
182{
183 struct csrow_info *csrow = to_csrow(dev);
184
185 return sprintf(data, "%s\n", dev_types[csrow->channels[0]->dimm->dtype]);
186}
187
188static ssize_t csrow_edac_mode_show(struct device *dev,
189 struct device_attribute *mattr,
190 char *data)
191{
192 struct csrow_info *csrow = to_csrow(dev);
193
194 return sprintf(data, "%s\n", edac_caps[csrow->channels[0]->dimm->edac_mode]);
195}
196
197
198static ssize_t channel_dimm_label_show(struct device *dev,
199 struct device_attribute *mattr,
200 char *data)
201{
202 struct csrow_info *csrow = to_csrow(dev);
203 unsigned int chan = to_channel(mattr);
204 struct rank_info *rank = csrow->channels[chan];
205
206
207 if (!rank->dimm->label[0])
208 return 0;
209
210 return snprintf(data, sizeof(rank->dimm->label) + 1, "%s\n",
211 rank->dimm->label);
212}
213
214static ssize_t channel_dimm_label_store(struct device *dev,
215 struct device_attribute *mattr,
216 const char *data, size_t count)
217{
218 struct csrow_info *csrow = to_csrow(dev);
219 unsigned int chan = to_channel(mattr);
220 struct rank_info *rank = csrow->channels[chan];
221 size_t copy_count = count;
222
223 if (count == 0)
224 return -EINVAL;
225
226 if (data[count - 1] == '\0' || data[count - 1] == '\n')
227 copy_count -= 1;
228
229 if (copy_count == 0 || copy_count >= sizeof(rank->dimm->label))
230 return -EINVAL;
231
232 strncpy(rank->dimm->label, data, copy_count);
233 rank->dimm->label[copy_count] = '\0';
234
235 return count;
236}
237
238
239static ssize_t channel_ce_count_show(struct device *dev,
240 struct device_attribute *mattr, char *data)
241{
242 struct csrow_info *csrow = to_csrow(dev);
243 unsigned int chan = to_channel(mattr);
244 struct rank_info *rank = csrow->channels[chan];
245
246 return sprintf(data, "%u\n", rank->ce_count);
247}
248
249
250DEVICE_ATTR_LEGACY(size_mb, S_IRUGO, csrow_size_show, NULL);
251DEVICE_ATTR_LEGACY(dev_type, S_IRUGO, csrow_dev_type_show, NULL);
252DEVICE_ATTR_LEGACY(mem_type, S_IRUGO, csrow_mem_type_show, NULL);
253DEVICE_ATTR_LEGACY(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL);
254DEVICE_ATTR_LEGACY(ue_count, S_IRUGO, csrow_ue_count_show, NULL);
255DEVICE_ATTR_LEGACY(ce_count, S_IRUGO, csrow_ce_count_show, NULL);
256
257
258static struct attribute *csrow_attrs[] = {
259 &dev_attr_legacy_dev_type.attr,
260 &dev_attr_legacy_mem_type.attr,
261 &dev_attr_legacy_edac_mode.attr,
262 &dev_attr_legacy_size_mb.attr,
263 &dev_attr_legacy_ue_count.attr,
264 &dev_attr_legacy_ce_count.attr,
265 NULL,
266};
267
268static const struct attribute_group csrow_attr_grp = {
269 .attrs = csrow_attrs,
270};
271
272static const struct attribute_group *csrow_attr_groups[] = {
273 &csrow_attr_grp,
274 NULL
275};
276
277static const struct device_type csrow_attr_type = {
278 .groups = csrow_attr_groups,
279};
280
281
282
283
284
285DEVICE_CHANNEL(ch0_dimm_label, S_IRUGO | S_IWUSR,
286 channel_dimm_label_show, channel_dimm_label_store, 0);
287DEVICE_CHANNEL(ch1_dimm_label, S_IRUGO | S_IWUSR,
288 channel_dimm_label_show, channel_dimm_label_store, 1);
289DEVICE_CHANNEL(ch2_dimm_label, S_IRUGO | S_IWUSR,
290 channel_dimm_label_show, channel_dimm_label_store, 2);
291DEVICE_CHANNEL(ch3_dimm_label, S_IRUGO | S_IWUSR,
292 channel_dimm_label_show, channel_dimm_label_store, 3);
293DEVICE_CHANNEL(ch4_dimm_label, S_IRUGO | S_IWUSR,
294 channel_dimm_label_show, channel_dimm_label_store, 4);
295DEVICE_CHANNEL(ch5_dimm_label, S_IRUGO | S_IWUSR,
296 channel_dimm_label_show, channel_dimm_label_store, 5);
297DEVICE_CHANNEL(ch6_dimm_label, S_IRUGO | S_IWUSR,
298 channel_dimm_label_show, channel_dimm_label_store, 6);
299DEVICE_CHANNEL(ch7_dimm_label, S_IRUGO | S_IWUSR,
300 channel_dimm_label_show, channel_dimm_label_store, 7);
301
302
303static struct attribute *dynamic_csrow_dimm_attr[] = {
304 &dev_attr_legacy_ch0_dimm_label.attr.attr,
305 &dev_attr_legacy_ch1_dimm_label.attr.attr,
306 &dev_attr_legacy_ch2_dimm_label.attr.attr,
307 &dev_attr_legacy_ch3_dimm_label.attr.attr,
308 &dev_attr_legacy_ch4_dimm_label.attr.attr,
309 &dev_attr_legacy_ch5_dimm_label.attr.attr,
310 &dev_attr_legacy_ch6_dimm_label.attr.attr,
311 &dev_attr_legacy_ch7_dimm_label.attr.attr,
312 NULL
313};
314
315
316DEVICE_CHANNEL(ch0_ce_count, S_IRUGO,
317 channel_ce_count_show, NULL, 0);
318DEVICE_CHANNEL(ch1_ce_count, S_IRUGO,
319 channel_ce_count_show, NULL, 1);
320DEVICE_CHANNEL(ch2_ce_count, S_IRUGO,
321 channel_ce_count_show, NULL, 2);
322DEVICE_CHANNEL(ch3_ce_count, S_IRUGO,
323 channel_ce_count_show, NULL, 3);
324DEVICE_CHANNEL(ch4_ce_count, S_IRUGO,
325 channel_ce_count_show, NULL, 4);
326DEVICE_CHANNEL(ch5_ce_count, S_IRUGO,
327 channel_ce_count_show, NULL, 5);
328DEVICE_CHANNEL(ch6_ce_count, S_IRUGO,
329 channel_ce_count_show, NULL, 6);
330DEVICE_CHANNEL(ch7_ce_count, S_IRUGO,
331 channel_ce_count_show, NULL, 7);
332
333
334static struct attribute *dynamic_csrow_ce_count_attr[] = {
335 &dev_attr_legacy_ch0_ce_count.attr.attr,
336 &dev_attr_legacy_ch1_ce_count.attr.attr,
337 &dev_attr_legacy_ch2_ce_count.attr.attr,
338 &dev_attr_legacy_ch3_ce_count.attr.attr,
339 &dev_attr_legacy_ch4_ce_count.attr.attr,
340 &dev_attr_legacy_ch5_ce_count.attr.attr,
341 &dev_attr_legacy_ch6_ce_count.attr.attr,
342 &dev_attr_legacy_ch7_ce_count.attr.attr,
343 NULL
344};
345
346static umode_t csrow_dev_is_visible(struct kobject *kobj,
347 struct attribute *attr, int idx)
348{
349 struct device *dev = kobj_to_dev(kobj);
350 struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);
351
352 if (idx >= csrow->nr_channels)
353 return 0;
354
355 if (idx >= ARRAY_SIZE(dynamic_csrow_ce_count_attr) - 1) {
356 WARN_ONCE(1, "idx: %d\n", idx);
357 return 0;
358 }
359
360
361 if (!csrow->channels[idx]->dimm->nr_pages)
362 return 0;
363
364 return attr->mode;
365}
366
367
368static const struct attribute_group csrow_dev_dimm_group = {
369 .attrs = dynamic_csrow_dimm_attr,
370 .is_visible = csrow_dev_is_visible,
371};
372
373static const struct attribute_group csrow_dev_ce_count_group = {
374 .attrs = dynamic_csrow_ce_count_attr,
375 .is_visible = csrow_dev_is_visible,
376};
377
378static const struct attribute_group *csrow_dev_groups[] = {
379 &csrow_dev_dimm_group,
380 &csrow_dev_ce_count_group,
381 NULL
382};
383
384static void csrow_release(struct device *dev)
385{
386
387
388
389
390}
391
392static inline int nr_pages_per_csrow(struct csrow_info *csrow)
393{
394 int chan, nr_pages = 0;
395
396 for (chan = 0; chan < csrow->nr_channels; chan++)
397 nr_pages += csrow->channels[chan]->dimm->nr_pages;
398
399 return nr_pages;
400}
401
402
403static int edac_create_csrow_object(struct mem_ctl_info *mci,
404 struct csrow_info *csrow, int index)
405{
406 int err;
407
408 csrow->dev.type = &csrow_attr_type;
409 csrow->dev.groups = csrow_dev_groups;
410 csrow->dev.release = csrow_release;
411 device_initialize(&csrow->dev);
412 csrow->dev.parent = &mci->dev;
413 csrow->mci = mci;
414 dev_set_name(&csrow->dev, "csrow%d", index);
415 dev_set_drvdata(&csrow->dev, csrow);
416
417 err = device_add(&csrow->dev);
418 if (err) {
419 edac_dbg(1, "failure: create device %s\n", dev_name(&csrow->dev));
420 put_device(&csrow->dev);
421 return err;
422 }
423
424 edac_dbg(0, "device %s created\n", dev_name(&csrow->dev));
425
426 return 0;
427}
428
429
430static int edac_create_csrow_objects(struct mem_ctl_info *mci)
431{
432 int err, i;
433 struct csrow_info *csrow;
434
435 for (i = 0; i < mci->nr_csrows; i++) {
436 csrow = mci->csrows[i];
437 if (!nr_pages_per_csrow(csrow))
438 continue;
439 err = edac_create_csrow_object(mci, mci->csrows[i], i);
440 if (err < 0)
441 goto error;
442 }
443 return 0;
444
445error:
446 for (--i; i >= 0; i--) {
447 if (device_is_registered(&mci->csrows[i]->dev))
448 device_unregister(&mci->csrows[i]->dev);
449 }
450
451 return err;
452}
453
454static void edac_delete_csrow_objects(struct mem_ctl_info *mci)
455{
456 int i;
457
458 for (i = 0; i < mci->nr_csrows; i++) {
459 if (device_is_registered(&mci->csrows[i]->dev))
460 device_unregister(&mci->csrows[i]->dev);
461 }
462}
463
464#endif
465
466
467
468
469
470#define to_dimm(k) container_of(k, struct dimm_info, dev)
471
472
473static ssize_t dimmdev_location_show(struct device *dev,
474 struct device_attribute *mattr, char *data)
475{
476 struct dimm_info *dimm = to_dimm(dev);
477 ssize_t count;
478
479 count = edac_dimm_info_location(dimm, data, PAGE_SIZE);
480 count += scnprintf(data + count, PAGE_SIZE - count, "\n");
481
482 return count;
483}
484
485static ssize_t dimmdev_label_show(struct device *dev,
486 struct device_attribute *mattr, char *data)
487{
488 struct dimm_info *dimm = to_dimm(dev);
489
490
491 if (!dimm->label[0])
492 return 0;
493
494 return snprintf(data, sizeof(dimm->label) + 1, "%s\n", dimm->label);
495}
496
497static ssize_t dimmdev_label_store(struct device *dev,
498 struct device_attribute *mattr,
499 const char *data,
500 size_t count)
501{
502 struct dimm_info *dimm = to_dimm(dev);
503 size_t copy_count = count;
504
505 if (count == 0)
506 return -EINVAL;
507
508 if (data[count - 1] == '\0' || data[count - 1] == '\n')
509 copy_count -= 1;
510
511 if (copy_count == 0 || copy_count >= sizeof(dimm->label))
512 return -EINVAL;
513
514 strncpy(dimm->label, data, copy_count);
515 dimm->label[copy_count] = '\0';
516
517 return count;
518}
519
520static ssize_t dimmdev_size_show(struct device *dev,
521 struct device_attribute *mattr, char *data)
522{
523 struct dimm_info *dimm = to_dimm(dev);
524
525 return sprintf(data, "%u\n", PAGES_TO_MiB(dimm->nr_pages));
526}
527
528static ssize_t dimmdev_mem_type_show(struct device *dev,
529 struct device_attribute *mattr, char *data)
530{
531 struct dimm_info *dimm = to_dimm(dev);
532
533 return sprintf(data, "%s\n", edac_mem_types[dimm->mtype]);
534}
535
536static ssize_t dimmdev_dev_type_show(struct device *dev,
537 struct device_attribute *mattr, char *data)
538{
539 struct dimm_info *dimm = to_dimm(dev);
540
541 return sprintf(data, "%s\n", dev_types[dimm->dtype]);
542}
543
544static ssize_t dimmdev_edac_mode_show(struct device *dev,
545 struct device_attribute *mattr,
546 char *data)
547{
548 struct dimm_info *dimm = to_dimm(dev);
549
550 return sprintf(data, "%s\n", edac_caps[dimm->edac_mode]);
551}
552
553static ssize_t dimmdev_ce_count_show(struct device *dev,
554 struct device_attribute *mattr,
555 char *data)
556{
557 struct dimm_info *dimm = to_dimm(dev);
558
559 return sprintf(data, "%u\n", dimm->ce_count);
560}
561
562static ssize_t dimmdev_ue_count_show(struct device *dev,
563 struct device_attribute *mattr,
564 char *data)
565{
566 struct dimm_info *dimm = to_dimm(dev);
567
568 return sprintf(data, "%u\n", dimm->ue_count);
569}
570
571
572static DEVICE_ATTR(dimm_label, S_IRUGO | S_IWUSR,
573 dimmdev_label_show, dimmdev_label_store);
574static DEVICE_ATTR(dimm_location, S_IRUGO, dimmdev_location_show, NULL);
575static DEVICE_ATTR(size, S_IRUGO, dimmdev_size_show, NULL);
576static DEVICE_ATTR(dimm_mem_type, S_IRUGO, dimmdev_mem_type_show, NULL);
577static DEVICE_ATTR(dimm_dev_type, S_IRUGO, dimmdev_dev_type_show, NULL);
578static DEVICE_ATTR(dimm_edac_mode, S_IRUGO, dimmdev_edac_mode_show, NULL);
579static DEVICE_ATTR(dimm_ce_count, S_IRUGO, dimmdev_ce_count_show, NULL);
580static DEVICE_ATTR(dimm_ue_count, S_IRUGO, dimmdev_ue_count_show, NULL);
581
582
583static struct attribute *dimm_attrs[] = {
584 &dev_attr_dimm_label.attr,
585 &dev_attr_dimm_location.attr,
586 &dev_attr_size.attr,
587 &dev_attr_dimm_mem_type.attr,
588 &dev_attr_dimm_dev_type.attr,
589 &dev_attr_dimm_edac_mode.attr,
590 &dev_attr_dimm_ce_count.attr,
591 &dev_attr_dimm_ue_count.attr,
592 NULL,
593};
594
595static const struct attribute_group dimm_attr_grp = {
596 .attrs = dimm_attrs,
597};
598
599static const struct attribute_group *dimm_attr_groups[] = {
600 &dimm_attr_grp,
601 NULL
602};
603
604static const struct device_type dimm_attr_type = {
605 .groups = dimm_attr_groups,
606};
607
608static void dimm_release(struct device *dev)
609{
610
611
612
613
614}
615
616
617static int edac_create_dimm_object(struct mem_ctl_info *mci,
618 struct dimm_info *dimm)
619{
620 int err;
621 dimm->mci = mci;
622
623 dimm->dev.type = &dimm_attr_type;
624 dimm->dev.release = dimm_release;
625 device_initialize(&dimm->dev);
626
627 dimm->dev.parent = &mci->dev;
628 if (mci->csbased)
629 dev_set_name(&dimm->dev, "rank%d", dimm->idx);
630 else
631 dev_set_name(&dimm->dev, "dimm%d", dimm->idx);
632 dev_set_drvdata(&dimm->dev, dimm);
633 pm_runtime_forbid(&mci->dev);
634
635 err = device_add(&dimm->dev);
636 if (err) {
637 edac_dbg(1, "failure: create device %s\n", dev_name(&dimm->dev));
638 put_device(&dimm->dev);
639 return err;
640 }
641
642 if (IS_ENABLED(CONFIG_EDAC_DEBUG)) {
643 char location[80];
644
645 edac_dimm_info_location(dimm, location, sizeof(location));
646 edac_dbg(0, "device %s created at location %s\n",
647 dev_name(&dimm->dev), location);
648 }
649
650 return 0;
651}
652
653
654
655
656
657#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
658
659static ssize_t mci_reset_counters_store(struct device *dev,
660 struct device_attribute *mattr,
661 const char *data, size_t count)
662{
663 struct mem_ctl_info *mci = to_mci(dev);
664 struct dimm_info *dimm;
665 int row, chan;
666
667 mci->ue_mc = 0;
668 mci->ce_mc = 0;
669 mci->ue_noinfo_count = 0;
670 mci->ce_noinfo_count = 0;
671
672 for (row = 0; row < mci->nr_csrows; row++) {
673 struct csrow_info *ri = mci->csrows[row];
674
675 ri->ue_count = 0;
676 ri->ce_count = 0;
677
678 for (chan = 0; chan < ri->nr_channels; chan++)
679 ri->channels[chan]->ce_count = 0;
680 }
681
682 mci_for_each_dimm(mci, dimm) {
683 dimm->ue_count = 0;
684 dimm->ce_count = 0;
685 }
686
687 mci->start_time = jiffies;
688 return count;
689}
690
691
692
693
694
695
696
697
698
699
700static ssize_t mci_sdram_scrub_rate_store(struct device *dev,
701 struct device_attribute *mattr,
702 const char *data, size_t count)
703{
704 struct mem_ctl_info *mci = to_mci(dev);
705 unsigned long bandwidth = 0;
706 int new_bw = 0;
707
708 if (kstrtoul(data, 10, &bandwidth) < 0)
709 return -EINVAL;
710
711 new_bw = mci->set_sdram_scrub_rate(mci, bandwidth);
712 if (new_bw < 0) {
713 edac_printk(KERN_WARNING, EDAC_MC,
714 "Error setting scrub rate to: %lu\n", bandwidth);
715 return -EINVAL;
716 }
717
718 return count;
719}
720
721
722
723
724static ssize_t mci_sdram_scrub_rate_show(struct device *dev,
725 struct device_attribute *mattr,
726 char *data)
727{
728 struct mem_ctl_info *mci = to_mci(dev);
729 int bandwidth = 0;
730
731 bandwidth = mci->get_sdram_scrub_rate(mci);
732 if (bandwidth < 0) {
733 edac_printk(KERN_DEBUG, EDAC_MC, "Error reading scrub rate\n");
734 return bandwidth;
735 }
736
737 return sprintf(data, "%d\n", bandwidth);
738}
739
740
741static ssize_t mci_ue_count_show(struct device *dev,
742 struct device_attribute *mattr,
743 char *data)
744{
745 struct mem_ctl_info *mci = to_mci(dev);
746
747 return sprintf(data, "%u\n", mci->ue_mc);
748}
749
750static ssize_t mci_ce_count_show(struct device *dev,
751 struct device_attribute *mattr,
752 char *data)
753{
754 struct mem_ctl_info *mci = to_mci(dev);
755
756 return sprintf(data, "%u\n", mci->ce_mc);
757}
758
759static ssize_t mci_ce_noinfo_show(struct device *dev,
760 struct device_attribute *mattr,
761 char *data)
762{
763 struct mem_ctl_info *mci = to_mci(dev);
764
765 return sprintf(data, "%u\n", mci->ce_noinfo_count);
766}
767
768static ssize_t mci_ue_noinfo_show(struct device *dev,
769 struct device_attribute *mattr,
770 char *data)
771{
772 struct mem_ctl_info *mci = to_mci(dev);
773
774 return sprintf(data, "%u\n", mci->ue_noinfo_count);
775}
776
777static ssize_t mci_seconds_show(struct device *dev,
778 struct device_attribute *mattr,
779 char *data)
780{
781 struct mem_ctl_info *mci = to_mci(dev);
782
783 return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
784}
785
786static ssize_t mci_ctl_name_show(struct device *dev,
787 struct device_attribute *mattr,
788 char *data)
789{
790 struct mem_ctl_info *mci = to_mci(dev);
791
792 return sprintf(data, "%s\n", mci->ctl_name);
793}
794
795static ssize_t mci_size_mb_show(struct device *dev,
796 struct device_attribute *mattr,
797 char *data)
798{
799 struct mem_ctl_info *mci = to_mci(dev);
800 int total_pages = 0, csrow_idx, j;
801
802 for (csrow_idx = 0; csrow_idx < mci->nr_csrows; csrow_idx++) {
803 struct csrow_info *csrow = mci->csrows[csrow_idx];
804
805 for (j = 0; j < csrow->nr_channels; j++) {
806 struct dimm_info *dimm = csrow->channels[j]->dimm;
807
808 total_pages += dimm->nr_pages;
809 }
810 }
811
812 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
813}
814
815static ssize_t mci_max_location_show(struct device *dev,
816 struct device_attribute *mattr,
817 char *data)
818{
819 struct mem_ctl_info *mci = to_mci(dev);
820 int len = PAGE_SIZE;
821 char *p = data;
822 int i, n;
823
824 for (i = 0; i < mci->n_layers; i++) {
825 n = scnprintf(p, len, "%s %d ",
826 edac_layer_name[mci->layers[i].type],
827 mci->layers[i].size - 1);
828 len -= n;
829 if (len <= 0)
830 goto out;
831
832 p += n;
833 }
834
835 p += scnprintf(p, len, "\n");
836out:
837 return p - data;
838}
839
840
841static DEVICE_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
842
843
844static DEVICE_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
845static DEVICE_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
846static DEVICE_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
847static DEVICE_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
848static DEVICE_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
849static DEVICE_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
850static DEVICE_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
851static DEVICE_ATTR(max_location, S_IRUGO, mci_max_location_show, NULL);
852
853
854static DEVICE_ATTR(sdram_scrub_rate, 0, mci_sdram_scrub_rate_show,
855 mci_sdram_scrub_rate_store);
856
857static struct attribute *mci_attrs[] = {
858 &dev_attr_reset_counters.attr,
859 &dev_attr_mc_name.attr,
860 &dev_attr_size_mb.attr,
861 &dev_attr_seconds_since_reset.attr,
862 &dev_attr_ue_noinfo_count.attr,
863 &dev_attr_ce_noinfo_count.attr,
864 &dev_attr_ue_count.attr,
865 &dev_attr_ce_count.attr,
866 &dev_attr_max_location.attr,
867 &dev_attr_sdram_scrub_rate.attr,
868 NULL
869};
870
871static umode_t mci_attr_is_visible(struct kobject *kobj,
872 struct attribute *attr, int idx)
873{
874 struct device *dev = kobj_to_dev(kobj);
875 struct mem_ctl_info *mci = to_mci(dev);
876 umode_t mode = 0;
877
878 if (attr != &dev_attr_sdram_scrub_rate.attr)
879 return attr->mode;
880 if (mci->get_sdram_scrub_rate)
881 mode |= S_IRUGO;
882 if (mci->set_sdram_scrub_rate)
883 mode |= S_IWUSR;
884 return mode;
885}
886
887static const struct attribute_group mci_attr_grp = {
888 .attrs = mci_attrs,
889 .is_visible = mci_attr_is_visible,
890};
891
892static const struct attribute_group *mci_attr_groups[] = {
893 &mci_attr_grp,
894 NULL
895};
896
897static const struct device_type mci_attr_type = {
898 .groups = mci_attr_groups,
899};
900
901
902
903
904
905
906
907
908
909int edac_create_sysfs_mci_device(struct mem_ctl_info *mci,
910 const struct attribute_group **groups)
911{
912 struct dimm_info *dimm;
913 int err;
914
915
916 mci->dev.type = &mci_attr_type;
917 mci->dev.parent = mci_pdev;
918 mci->dev.groups = groups;
919 dev_set_name(&mci->dev, "mc%d", mci->mc_idx);
920 dev_set_drvdata(&mci->dev, mci);
921 pm_runtime_forbid(&mci->dev);
922
923 err = device_add(&mci->dev);
924 if (err < 0) {
925 edac_dbg(1, "failure: create device %s\n", dev_name(&mci->dev));
926
927 return err;
928 }
929
930 edac_dbg(0, "device %s created\n", dev_name(&mci->dev));
931
932
933
934
935 mci_for_each_dimm(mci, dimm) {
936
937 if (!dimm->nr_pages)
938 continue;
939
940 err = edac_create_dimm_object(mci, dimm);
941 if (err)
942 goto fail;
943 }
944
945#ifdef CONFIG_EDAC_LEGACY_SYSFS
946 err = edac_create_csrow_objects(mci);
947 if (err < 0)
948 goto fail;
949#endif
950
951 edac_create_debugfs_nodes(mci);
952 return 0;
953
954fail:
955 edac_remove_sysfs_mci_device(mci);
956
957 return err;
958}
959
960
961
962
963void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
964{
965 struct dimm_info *dimm;
966
967 if (!device_is_registered(&mci->dev))
968 return;
969
970 edac_dbg(0, "\n");
971
972#ifdef CONFIG_EDAC_DEBUG
973 edac_debugfs_remove_recursive(mci->debugfs);
974#endif
975#ifdef CONFIG_EDAC_LEGACY_SYSFS
976 edac_delete_csrow_objects(mci);
977#endif
978
979 mci_for_each_dimm(mci, dimm) {
980 if (!device_is_registered(&dimm->dev))
981 continue;
982 edac_dbg(1, "unregistering device %s\n", dev_name(&dimm->dev));
983 device_unregister(&dimm->dev);
984 }
985
986
987 device_del(&mci->dev);
988}
989
990static void mc_attr_release(struct device *dev)
991{
992
993
994
995
996
997 edac_dbg(1, "device %s released\n", dev_name(dev));
998 kfree(dev);
999}
1000
1001
1002
1003
1004int __init edac_mc_sysfs_init(void)
1005{
1006 int err;
1007
1008 mci_pdev = kzalloc(sizeof(*mci_pdev), GFP_KERNEL);
1009 if (!mci_pdev)
1010 return -ENOMEM;
1011
1012 mci_pdev->bus = edac_get_sysfs_subsys();
1013 mci_pdev->release = mc_attr_release;
1014 mci_pdev->init_name = "mc";
1015
1016 err = device_register(mci_pdev);
1017 if (err < 0) {
1018 edac_dbg(1, "failure: create device %s\n", dev_name(mci_pdev));
1019 put_device(mci_pdev);
1020 return err;
1021 }
1022
1023 edac_dbg(0, "device %s created\n", dev_name(mci_pdev));
1024
1025 return 0;
1026}
1027
1028void edac_mc_sysfs_exit(void)
1029{
1030 device_unregister(mci_pdev);
1031}
1032