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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 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
48int 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 long l;
56 int ret;
57
58 if (!val)
59 return -EINVAL;
60
61 ret = kstrtoul(val, 0, &l);
62 if (ret)
63 return ret;
64
65 if (l < 1000)
66 return -EINVAL;
67
68 *((unsigned long *)kp->arg) = l;
69
70
71 edac_mc_reset_delay_period(l);
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_int,
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 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 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 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 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 void csrow_attr_release(struct device *dev)
278{
279 struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);
280
281 edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev));
282 kfree(csrow);
283}
284
285static const struct device_type csrow_attr_type = {
286 .groups = csrow_attr_groups,
287 .release = csrow_attr_release,
288};
289
290
291
292
293
294DEVICE_CHANNEL(ch0_dimm_label, S_IRUGO | S_IWUSR,
295 channel_dimm_label_show, channel_dimm_label_store, 0);
296DEVICE_CHANNEL(ch1_dimm_label, S_IRUGO | S_IWUSR,
297 channel_dimm_label_show, channel_dimm_label_store, 1);
298DEVICE_CHANNEL(ch2_dimm_label, S_IRUGO | S_IWUSR,
299 channel_dimm_label_show, channel_dimm_label_store, 2);
300DEVICE_CHANNEL(ch3_dimm_label, S_IRUGO | S_IWUSR,
301 channel_dimm_label_show, channel_dimm_label_store, 3);
302DEVICE_CHANNEL(ch4_dimm_label, S_IRUGO | S_IWUSR,
303 channel_dimm_label_show, channel_dimm_label_store, 4);
304DEVICE_CHANNEL(ch5_dimm_label, S_IRUGO | S_IWUSR,
305 channel_dimm_label_show, channel_dimm_label_store, 5);
306DEVICE_CHANNEL(ch6_dimm_label, S_IRUGO | S_IWUSR,
307 channel_dimm_label_show, channel_dimm_label_store, 6);
308DEVICE_CHANNEL(ch7_dimm_label, S_IRUGO | S_IWUSR,
309 channel_dimm_label_show, channel_dimm_label_store, 7);
310
311
312static struct attribute *dynamic_csrow_dimm_attr[] = {
313 &dev_attr_legacy_ch0_dimm_label.attr.attr,
314 &dev_attr_legacy_ch1_dimm_label.attr.attr,
315 &dev_attr_legacy_ch2_dimm_label.attr.attr,
316 &dev_attr_legacy_ch3_dimm_label.attr.attr,
317 &dev_attr_legacy_ch4_dimm_label.attr.attr,
318 &dev_attr_legacy_ch5_dimm_label.attr.attr,
319 &dev_attr_legacy_ch6_dimm_label.attr.attr,
320 &dev_attr_legacy_ch7_dimm_label.attr.attr,
321 NULL
322};
323
324
325DEVICE_CHANNEL(ch0_ce_count, S_IRUGO,
326 channel_ce_count_show, NULL, 0);
327DEVICE_CHANNEL(ch1_ce_count, S_IRUGO,
328 channel_ce_count_show, NULL, 1);
329DEVICE_CHANNEL(ch2_ce_count, S_IRUGO,
330 channel_ce_count_show, NULL, 2);
331DEVICE_CHANNEL(ch3_ce_count, S_IRUGO,
332 channel_ce_count_show, NULL, 3);
333DEVICE_CHANNEL(ch4_ce_count, S_IRUGO,
334 channel_ce_count_show, NULL, 4);
335DEVICE_CHANNEL(ch5_ce_count, S_IRUGO,
336 channel_ce_count_show, NULL, 5);
337DEVICE_CHANNEL(ch6_ce_count, S_IRUGO,
338 channel_ce_count_show, NULL, 6);
339DEVICE_CHANNEL(ch7_ce_count, S_IRUGO,
340 channel_ce_count_show, NULL, 7);
341
342
343static struct attribute *dynamic_csrow_ce_count_attr[] = {
344 &dev_attr_legacy_ch0_ce_count.attr.attr,
345 &dev_attr_legacy_ch1_ce_count.attr.attr,
346 &dev_attr_legacy_ch2_ce_count.attr.attr,
347 &dev_attr_legacy_ch3_ce_count.attr.attr,
348 &dev_attr_legacy_ch4_ce_count.attr.attr,
349 &dev_attr_legacy_ch5_ce_count.attr.attr,
350 &dev_attr_legacy_ch6_ce_count.attr.attr,
351 &dev_attr_legacy_ch7_ce_count.attr.attr,
352 NULL
353};
354
355static umode_t csrow_dev_is_visible(struct kobject *kobj,
356 struct attribute *attr, int idx)
357{
358 struct device *dev = kobj_to_dev(kobj);
359 struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);
360
361 if (idx >= csrow->nr_channels)
362 return 0;
363
364 if (idx >= ARRAY_SIZE(dynamic_csrow_ce_count_attr) - 1) {
365 WARN_ONCE(1, "idx: %d\n", idx);
366 return 0;
367 }
368
369
370 if (!csrow->channels[idx]->dimm->nr_pages)
371 return 0;
372
373 return attr->mode;
374}
375
376
377static const struct attribute_group csrow_dev_dimm_group = {
378 .attrs = dynamic_csrow_dimm_attr,
379 .is_visible = csrow_dev_is_visible,
380};
381
382static const struct attribute_group csrow_dev_ce_count_group = {
383 .attrs = dynamic_csrow_ce_count_attr,
384 .is_visible = csrow_dev_is_visible,
385};
386
387static const struct attribute_group *csrow_dev_groups[] = {
388 &csrow_dev_dimm_group,
389 &csrow_dev_ce_count_group,
390 NULL
391};
392
393static inline int nr_pages_per_csrow(struct csrow_info *csrow)
394{
395 int chan, nr_pages = 0;
396
397 for (chan = 0; chan < csrow->nr_channels; chan++)
398 nr_pages += csrow->channels[chan]->dimm->nr_pages;
399
400 return nr_pages;
401}
402
403
404static int edac_create_csrow_object(struct mem_ctl_info *mci,
405 struct csrow_info *csrow, int index)
406{
407 csrow->dev.type = &csrow_attr_type;
408 csrow->dev.groups = csrow_dev_groups;
409 device_initialize(&csrow->dev);
410 csrow->dev.parent = &mci->dev;
411 csrow->mci = mci;
412 dev_set_name(&csrow->dev, "csrow%d", index);
413 dev_set_drvdata(&csrow->dev, csrow);
414
415 edac_dbg(0, "creating (virtual) csrow node %s\n",
416 dev_name(&csrow->dev));
417
418 return device_add(&csrow->dev);
419}
420
421
422static int edac_create_csrow_objects(struct mem_ctl_info *mci)
423{
424 int err, i;
425 struct csrow_info *csrow;
426
427 for (i = 0; i < mci->nr_csrows; i++) {
428 csrow = mci->csrows[i];
429 if (!nr_pages_per_csrow(csrow))
430 continue;
431 err = edac_create_csrow_object(mci, mci->csrows[i], i);
432 if (err < 0) {
433 edac_dbg(1,
434 "failure: create csrow objects for csrow %d\n",
435 i);
436 goto error;
437 }
438 }
439 return 0;
440
441error:
442 for (--i; i >= 0; i--) {
443 csrow = mci->csrows[i];
444 if (!nr_pages_per_csrow(csrow))
445 continue;
446 put_device(&mci->csrows[i]->dev);
447 }
448
449 return err;
450}
451
452static void edac_delete_csrow_objects(struct mem_ctl_info *mci)
453{
454 int i;
455 struct csrow_info *csrow;
456
457 for (i = mci->nr_csrows - 1; i >= 0; i--) {
458 csrow = mci->csrows[i];
459 if (!nr_pages_per_csrow(csrow))
460 continue;
461 device_unregister(&mci->csrows[i]->dev);
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
478 return edac_dimm_info_location(dimm, data, PAGE_SIZE);
479}
480
481static ssize_t dimmdev_label_show(struct device *dev,
482 struct device_attribute *mattr, char *data)
483{
484 struct dimm_info *dimm = to_dimm(dev);
485
486
487 if (!dimm->label[0])
488 return 0;
489
490 return snprintf(data, sizeof(dimm->label) + 1, "%s\n", dimm->label);
491}
492
493static ssize_t dimmdev_label_store(struct device *dev,
494 struct device_attribute *mattr,
495 const char *data,
496 size_t count)
497{
498 struct dimm_info *dimm = to_dimm(dev);
499 size_t copy_count = count;
500
501 if (count == 0)
502 return -EINVAL;
503
504 if (data[count - 1] == '\0' || data[count - 1] == '\n')
505 copy_count -= 1;
506
507 if (copy_count == 0 || copy_count >= sizeof(dimm->label))
508 return -EINVAL;
509
510 strncpy(dimm->label, data, copy_count);
511 dimm->label[copy_count] = '\0';
512
513 return count;
514}
515
516static ssize_t dimmdev_size_show(struct device *dev,
517 struct device_attribute *mattr, char *data)
518{
519 struct dimm_info *dimm = to_dimm(dev);
520
521 return sprintf(data, "%u\n", PAGES_TO_MiB(dimm->nr_pages));
522}
523
524static ssize_t dimmdev_mem_type_show(struct device *dev,
525 struct device_attribute *mattr, char *data)
526{
527 struct dimm_info *dimm = to_dimm(dev);
528
529 return sprintf(data, "%s\n", edac_mem_types[dimm->mtype]);
530}
531
532static ssize_t dimmdev_dev_type_show(struct device *dev,
533 struct device_attribute *mattr, char *data)
534{
535 struct dimm_info *dimm = to_dimm(dev);
536
537 return sprintf(data, "%s\n", dev_types[dimm->dtype]);
538}
539
540static ssize_t dimmdev_edac_mode_show(struct device *dev,
541 struct device_attribute *mattr,
542 char *data)
543{
544 struct dimm_info *dimm = to_dimm(dev);
545
546 return sprintf(data, "%s\n", edac_caps[dimm->edac_mode]);
547}
548
549static ssize_t dimmdev_ce_count_show(struct device *dev,
550 struct device_attribute *mattr,
551 char *data)
552{
553 struct dimm_info *dimm = to_dimm(dev);
554 u32 count;
555 int off;
556
557 off = EDAC_DIMM_OFF(dimm->mci->layers,
558 dimm->mci->n_layers,
559 dimm->location[0],
560 dimm->location[1],
561 dimm->location[2]);
562 count = dimm->mci->ce_per_layer[dimm->mci->n_layers-1][off];
563 return sprintf(data, "%u\n", count);
564}
565
566static ssize_t dimmdev_ue_count_show(struct device *dev,
567 struct device_attribute *mattr,
568 char *data)
569{
570 struct dimm_info *dimm = to_dimm(dev);
571 u32 count;
572 int off;
573
574 off = EDAC_DIMM_OFF(dimm->mci->layers,
575 dimm->mci->n_layers,
576 dimm->location[0],
577 dimm->location[1],
578 dimm->location[2]);
579 count = dimm->mci->ue_per_layer[dimm->mci->n_layers-1][off];
580 return sprintf(data, "%u\n", count);
581}
582
583
584static DEVICE_ATTR(dimm_label, S_IRUGO | S_IWUSR,
585 dimmdev_label_show, dimmdev_label_store);
586static DEVICE_ATTR(dimm_location, S_IRUGO, dimmdev_location_show, NULL);
587static DEVICE_ATTR(size, S_IRUGO, dimmdev_size_show, NULL);
588static DEVICE_ATTR(dimm_mem_type, S_IRUGO, dimmdev_mem_type_show, NULL);
589static DEVICE_ATTR(dimm_dev_type, S_IRUGO, dimmdev_dev_type_show, NULL);
590static DEVICE_ATTR(dimm_edac_mode, S_IRUGO, dimmdev_edac_mode_show, NULL);
591static DEVICE_ATTR(dimm_ce_count, S_IRUGO, dimmdev_ce_count_show, NULL);
592static DEVICE_ATTR(dimm_ue_count, S_IRUGO, dimmdev_ue_count_show, NULL);
593
594
595static struct attribute *dimm_attrs[] = {
596 &dev_attr_dimm_label.attr,
597 &dev_attr_dimm_location.attr,
598 &dev_attr_size.attr,
599 &dev_attr_dimm_mem_type.attr,
600 &dev_attr_dimm_dev_type.attr,
601 &dev_attr_dimm_edac_mode.attr,
602 &dev_attr_dimm_ce_count.attr,
603 &dev_attr_dimm_ue_count.attr,
604 NULL,
605};
606
607static const struct attribute_group dimm_attr_grp = {
608 .attrs = dimm_attrs,
609};
610
611static const struct attribute_group *dimm_attr_groups[] = {
612 &dimm_attr_grp,
613 NULL
614};
615
616static void dimm_attr_release(struct device *dev)
617{
618 struct dimm_info *dimm = container_of(dev, struct dimm_info, dev);
619
620 edac_dbg(1, "Releasing dimm device %s\n", dev_name(dev));
621 kfree(dimm);
622}
623
624static const struct device_type dimm_attr_type = {
625 .groups = dimm_attr_groups,
626 .release = dimm_attr_release,
627};
628
629
630static int edac_create_dimm_object(struct mem_ctl_info *mci,
631 struct dimm_info *dimm,
632 int index)
633{
634 int err;
635 dimm->mci = mci;
636
637 dimm->dev.type = &dimm_attr_type;
638 device_initialize(&dimm->dev);
639
640 dimm->dev.parent = &mci->dev;
641 if (mci->csbased)
642 dev_set_name(&dimm->dev, "rank%d", index);
643 else
644 dev_set_name(&dimm->dev, "dimm%d", index);
645 dev_set_drvdata(&dimm->dev, dimm);
646 pm_runtime_forbid(&mci->dev);
647
648 err = device_add(&dimm->dev);
649
650 edac_dbg(0, "creating rank/dimm device %s\n", dev_name(&dimm->dev));
651
652 return err;
653}
654
655
656
657
658
659#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
660
661static ssize_t mci_reset_counters_store(struct device *dev,
662 struct device_attribute *mattr,
663 const char *data, size_t count)
664{
665 struct mem_ctl_info *mci = to_mci(dev);
666 int cnt, row, chan, i;
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 cnt = 1;
683 for (i = 0; i < mci->n_layers; i++) {
684 cnt *= mci->layers[i].size;
685 memset(mci->ce_per_layer[i], 0, cnt * sizeof(u32));
686 memset(mci->ue_per_layer[i], 0, cnt * sizeof(u32));
687 }
688
689 mci->start_time = jiffies;
690 return count;
691}
692
693
694
695
696
697
698
699
700
701
702static ssize_t mci_sdram_scrub_rate_store(struct device *dev,
703 struct device_attribute *mattr,
704 const char *data, size_t count)
705{
706 struct mem_ctl_info *mci = to_mci(dev);
707 unsigned long bandwidth = 0;
708 int new_bw = 0;
709
710 if (kstrtoul(data, 10, &bandwidth) < 0)
711 return -EINVAL;
712
713 new_bw = mci->set_sdram_scrub_rate(mci, bandwidth);
714 if (new_bw < 0) {
715 edac_printk(KERN_WARNING, EDAC_MC,
716 "Error setting scrub rate to: %lu\n", bandwidth);
717 return -EINVAL;
718 }
719
720 return count;
721}
722
723
724
725
726static ssize_t mci_sdram_scrub_rate_show(struct device *dev,
727 struct device_attribute *mattr,
728 char *data)
729{
730 struct mem_ctl_info *mci = to_mci(dev);
731 int bandwidth = 0;
732
733 bandwidth = mci->get_sdram_scrub_rate(mci);
734 if (bandwidth < 0) {
735 edac_printk(KERN_DEBUG, EDAC_MC, "Error reading scrub rate\n");
736 return bandwidth;
737 }
738
739 return sprintf(data, "%d\n", bandwidth);
740}
741
742
743static ssize_t mci_ue_count_show(struct device *dev,
744 struct device_attribute *mattr,
745 char *data)
746{
747 struct mem_ctl_info *mci = to_mci(dev);
748
749 return sprintf(data, "%d\n", mci->ue_mc);
750}
751
752static ssize_t mci_ce_count_show(struct device *dev,
753 struct device_attribute *mattr,
754 char *data)
755{
756 struct mem_ctl_info *mci = to_mci(dev);
757
758 return sprintf(data, "%d\n", mci->ce_mc);
759}
760
761static ssize_t mci_ce_noinfo_show(struct device *dev,
762 struct device_attribute *mattr,
763 char *data)
764{
765 struct mem_ctl_info *mci = to_mci(dev);
766
767 return sprintf(data, "%d\n", mci->ce_noinfo_count);
768}
769
770static ssize_t mci_ue_noinfo_show(struct device *dev,
771 struct device_attribute *mattr,
772 char *data)
773{
774 struct mem_ctl_info *mci = to_mci(dev);
775
776 return sprintf(data, "%d\n", mci->ue_noinfo_count);
777}
778
779static ssize_t mci_seconds_show(struct device *dev,
780 struct device_attribute *mattr,
781 char *data)
782{
783 struct mem_ctl_info *mci = to_mci(dev);
784
785 return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
786}
787
788static ssize_t mci_ctl_name_show(struct device *dev,
789 struct device_attribute *mattr,
790 char *data)
791{
792 struct mem_ctl_info *mci = to_mci(dev);
793
794 return sprintf(data, "%s\n", mci->ctl_name);
795}
796
797static ssize_t mci_size_mb_show(struct device *dev,
798 struct device_attribute *mattr,
799 char *data)
800{
801 struct mem_ctl_info *mci = to_mci(dev);
802 int total_pages = 0, csrow_idx, j;
803
804 for (csrow_idx = 0; csrow_idx < mci->nr_csrows; csrow_idx++) {
805 struct csrow_info *csrow = mci->csrows[csrow_idx];
806
807 for (j = 0; j < csrow->nr_channels; j++) {
808 struct dimm_info *dimm = csrow->channels[j]->dimm;
809
810 total_pages += dimm->nr_pages;
811 }
812 }
813
814 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
815}
816
817static ssize_t mci_max_location_show(struct device *dev,
818 struct device_attribute *mattr,
819 char *data)
820{
821 struct mem_ctl_info *mci = to_mci(dev);
822 int i;
823 char *p = data;
824
825 for (i = 0; i < mci->n_layers; i++) {
826 p += sprintf(p, "%s %d ",
827 edac_layer_name[mci->layers[i].type],
828 mci->layers[i].size - 1);
829 }
830
831 return p - data;
832}
833
834
835static DEVICE_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
836
837
838static DEVICE_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
839static DEVICE_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
840static DEVICE_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
841static DEVICE_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
842static DEVICE_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
843static DEVICE_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
844static DEVICE_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
845static DEVICE_ATTR(max_location, S_IRUGO, mci_max_location_show, NULL);
846
847
848static DEVICE_ATTR(sdram_scrub_rate, 0, mci_sdram_scrub_rate_show,
849 mci_sdram_scrub_rate_store);
850
851static struct attribute *mci_attrs[] = {
852 &dev_attr_reset_counters.attr,
853 &dev_attr_mc_name.attr,
854 &dev_attr_size_mb.attr,
855 &dev_attr_seconds_since_reset.attr,
856 &dev_attr_ue_noinfo_count.attr,
857 &dev_attr_ce_noinfo_count.attr,
858 &dev_attr_ue_count.attr,
859 &dev_attr_ce_count.attr,
860 &dev_attr_max_location.attr,
861 &dev_attr_sdram_scrub_rate.attr,
862 NULL
863};
864
865static umode_t mci_attr_is_visible(struct kobject *kobj,
866 struct attribute *attr, int idx)
867{
868 struct device *dev = kobj_to_dev(kobj);
869 struct mem_ctl_info *mci = to_mci(dev);
870 umode_t mode = 0;
871
872 if (attr != &dev_attr_sdram_scrub_rate.attr)
873 return attr->mode;
874 if (mci->get_sdram_scrub_rate)
875 mode |= S_IRUGO;
876 if (mci->set_sdram_scrub_rate)
877 mode |= S_IWUSR;
878 return mode;
879}
880
881static const struct attribute_group mci_attr_grp = {
882 .attrs = mci_attrs,
883 .is_visible = mci_attr_is_visible,
884};
885
886static const struct attribute_group *mci_attr_groups[] = {
887 &mci_attr_grp,
888 NULL
889};
890
891static void mci_attr_release(struct device *dev)
892{
893 struct mem_ctl_info *mci = container_of(dev, struct mem_ctl_info, dev);
894
895 edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev));
896 kfree(mci);
897}
898
899static const struct device_type mci_attr_type = {
900 .groups = mci_attr_groups,
901 .release = mci_attr_release,
902};
903
904
905
906
907
908
909
910
911
912int edac_create_sysfs_mci_device(struct mem_ctl_info *mci,
913 const struct attribute_group **groups)
914{
915 int i, err;
916
917
918 mci->dev.type = &mci_attr_type;
919 device_initialize(&mci->dev);
920
921 mci->dev.parent = mci_pdev;
922 mci->dev.groups = groups;
923 dev_set_name(&mci->dev, "mc%d", mci->mc_idx);
924 dev_set_drvdata(&mci->dev, mci);
925 pm_runtime_forbid(&mci->dev);
926
927 edac_dbg(0, "creating device %s\n", dev_name(&mci->dev));
928 err = device_add(&mci->dev);
929 if (err < 0) {
930 edac_dbg(1, "failure: create device %s\n", dev_name(&mci->dev));
931 goto out;
932 }
933
934
935
936
937 for (i = 0; i < mci->tot_dimms; i++) {
938 struct dimm_info *dimm = mci->dimms[i];
939
940 if (!dimm->nr_pages)
941 continue;
942
943#ifdef CONFIG_EDAC_DEBUG
944 edac_dbg(1, "creating dimm%d, located at ", i);
945 if (edac_debug_level >= 1) {
946 int lay;
947 for (lay = 0; lay < mci->n_layers; lay++)
948 printk(KERN_CONT "%s %d ",
949 edac_layer_name[mci->layers[lay].type],
950 dimm->location[lay]);
951 printk(KERN_CONT "\n");
952 }
953#endif
954 err = edac_create_dimm_object(mci, dimm, i);
955 if (err) {
956 edac_dbg(1, "failure: create dimm %d obj\n", i);
957 goto fail_unregister_dimm;
958 }
959 }
960
961#ifdef CONFIG_EDAC_LEGACY_SYSFS
962 err = edac_create_csrow_objects(mci);
963 if (err < 0)
964 goto fail_unregister_dimm;
965#endif
966
967 edac_create_debugfs_nodes(mci);
968 return 0;
969
970fail_unregister_dimm:
971 for (i--; i >= 0; i--) {
972 struct dimm_info *dimm = mci->dimms[i];
973 if (!dimm->nr_pages)
974 continue;
975
976 device_unregister(&dimm->dev);
977 }
978 device_unregister(&mci->dev);
979
980out:
981 return err;
982}
983
984
985
986
987void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
988{
989 int i;
990
991 edac_dbg(0, "\n");
992
993#ifdef CONFIG_EDAC_DEBUG
994 edac_debugfs_remove_recursive(mci->debugfs);
995#endif
996#ifdef CONFIG_EDAC_LEGACY_SYSFS
997 edac_delete_csrow_objects(mci);
998#endif
999
1000 for (i = 0; i < mci->tot_dimms; i++) {
1001 struct dimm_info *dimm = mci->dimms[i];
1002 if (dimm->nr_pages == 0)
1003 continue;
1004 edac_dbg(0, "removing device %s\n", dev_name(&dimm->dev));
1005 device_unregister(&dimm->dev);
1006 }
1007}
1008
1009void edac_unregister_sysfs(struct mem_ctl_info *mci)
1010{
1011 edac_dbg(1, "Unregistering device %s\n", dev_name(&mci->dev));
1012 device_unregister(&mci->dev);
1013}
1014
1015static void mc_attr_release(struct device *dev)
1016{
1017
1018
1019
1020
1021
1022 edac_dbg(1, "Releasing device %s\n", dev_name(dev));
1023 kfree(dev);
1024}
1025
1026static const struct device_type mc_attr_type = {
1027 .release = mc_attr_release,
1028};
1029
1030
1031
1032int __init edac_mc_sysfs_init(void)
1033{
1034 int err;
1035
1036 mci_pdev = kzalloc(sizeof(*mci_pdev), GFP_KERNEL);
1037 if (!mci_pdev) {
1038 err = -ENOMEM;
1039 goto out;
1040 }
1041
1042 mci_pdev->bus = edac_get_sysfs_subsys();
1043 mci_pdev->type = &mc_attr_type;
1044 device_initialize(mci_pdev);
1045 dev_set_name(mci_pdev, "mc");
1046
1047 err = device_add(mci_pdev);
1048 if (err < 0)
1049 goto out_put_device;
1050
1051 edac_dbg(0, "device %s created\n", dev_name(mci_pdev));
1052
1053 return 0;
1054
1055 out_put_device:
1056 put_device(mci_pdev);
1057 out:
1058 return err;
1059}
1060
1061void edac_mc_sysfs_exit(void)
1062{
1063 device_unregister(mci_pdev);
1064}
1065