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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_core.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, 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 mem_types[] = {
95 [MEM_EMPTY] = "Empty",
96 [MEM_RESERVED] = "Reserved",
97 [MEM_UNKNOWN] = "Unknown",
98 [MEM_FPM] = "FPM",
99 [MEM_EDO] = "EDO",
100 [MEM_BEDO] = "BEDO",
101 [MEM_SDR] = "Unbuffered-SDR",
102 [MEM_RDR] = "Registered-SDR",
103 [MEM_DDR] = "Unbuffered-DDR",
104 [MEM_RDDR] = "Registered-DDR",
105 [MEM_RMBS] = "RMBS",
106 [MEM_DDR2] = "Unbuffered-DDR2",
107 [MEM_FB_DDR2] = "FullyBuffered-DDR2",
108 [MEM_RDDR2] = "Registered-DDR2",
109 [MEM_XDR] = "XDR",
110 [MEM_DDR3] = "Unbuffered-DDR3",
111 [MEM_RDDR3] = "Registered-DDR3",
112 [MEM_DDR4] = "Unbuffered-DDR4",
113 [MEM_RDDR4] = "Registered-DDR4"
114};
115
116static const char * const dev_types[] = {
117 [DEV_UNKNOWN] = "Unknown",
118 [DEV_X1] = "x1",
119 [DEV_X2] = "x2",
120 [DEV_X4] = "x4",
121 [DEV_X8] = "x8",
122 [DEV_X16] = "x16",
123 [DEV_X32] = "x32",
124 [DEV_X64] = "x64"
125};
126
127static const char * const edac_caps[] = {
128 [EDAC_UNKNOWN] = "Unknown",
129 [EDAC_NONE] = "None",
130 [EDAC_RESERVED] = "Reserved",
131 [EDAC_PARITY] = "PARITY",
132 [EDAC_EC] = "EC",
133 [EDAC_SECDED] = "SECDED",
134 [EDAC_S2ECD2ED] = "S2ECD2ED",
135 [EDAC_S4ECD4ED] = "S4ECD4ED",
136 [EDAC_S8ECD8ED] = "S8ECD8ED",
137 [EDAC_S16ECD16ED] = "S16ECD16ED"
138};
139
140#ifdef CONFIG_EDAC_LEGACY_SYSFS
141
142
143
144
145#define to_csrow(k) container_of(k, struct csrow_info, dev)
146
147
148
149
150
151#define DEVICE_ATTR_LEGACY(_name, _mode, _show, _store) \
152 static struct device_attribute dev_attr_legacy_##_name = __ATTR(_name, _mode, _show, _store)
153
154struct dev_ch_attribute {
155 struct device_attribute attr;
156 int channel;
157};
158
159#define DEVICE_CHANNEL(_name, _mode, _show, _store, _var) \
160 static struct dev_ch_attribute dev_attr_legacy_##_name = \
161 { __ATTR(_name, _mode, _show, _store), (_var) }
162
163#define to_channel(k) (container_of(k, struct dev_ch_attribute, attr)->channel)
164
165
166static ssize_t csrow_ue_count_show(struct device *dev,
167 struct device_attribute *mattr, char *data)
168{
169 struct csrow_info *csrow = to_csrow(dev);
170
171 return sprintf(data, "%u\n", csrow->ue_count);
172}
173
174static ssize_t csrow_ce_count_show(struct device *dev,
175 struct device_attribute *mattr, char *data)
176{
177 struct csrow_info *csrow = to_csrow(dev);
178
179 return sprintf(data, "%u\n", csrow->ce_count);
180}
181
182static ssize_t csrow_size_show(struct device *dev,
183 struct device_attribute *mattr, char *data)
184{
185 struct csrow_info *csrow = to_csrow(dev);
186 int i;
187 u32 nr_pages = 0;
188
189 for (i = 0; i < csrow->nr_channels; i++)
190 nr_pages += csrow->channels[i]->dimm->nr_pages;
191 return sprintf(data, "%u\n", PAGES_TO_MiB(nr_pages));
192}
193
194static ssize_t csrow_mem_type_show(struct device *dev,
195 struct device_attribute *mattr, char *data)
196{
197 struct csrow_info *csrow = to_csrow(dev);
198
199 return sprintf(data, "%s\n", mem_types[csrow->channels[0]->dimm->mtype]);
200}
201
202static ssize_t csrow_dev_type_show(struct device *dev,
203 struct device_attribute *mattr, char *data)
204{
205 struct csrow_info *csrow = to_csrow(dev);
206
207 return sprintf(data, "%s\n", dev_types[csrow->channels[0]->dimm->dtype]);
208}
209
210static ssize_t csrow_edac_mode_show(struct device *dev,
211 struct device_attribute *mattr,
212 char *data)
213{
214 struct csrow_info *csrow = to_csrow(dev);
215
216 return sprintf(data, "%s\n", edac_caps[csrow->channels[0]->dimm->edac_mode]);
217}
218
219
220static ssize_t channel_dimm_label_show(struct device *dev,
221 struct device_attribute *mattr,
222 char *data)
223{
224 struct csrow_info *csrow = to_csrow(dev);
225 unsigned chan = to_channel(mattr);
226 struct rank_info *rank = csrow->channels[chan];
227
228
229 if (!rank->dimm->label[0])
230 return 0;
231
232 return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n",
233 rank->dimm->label);
234}
235
236static ssize_t channel_dimm_label_store(struct device *dev,
237 struct device_attribute *mattr,
238 const char *data, size_t count)
239{
240 struct csrow_info *csrow = to_csrow(dev);
241 unsigned chan = to_channel(mattr);
242 struct rank_info *rank = csrow->channels[chan];
243
244 ssize_t max_size = 0;
245
246 max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
247 strncpy(rank->dimm->label, data, max_size);
248 rank->dimm->label[max_size] = '\0';
249
250 return max_size;
251}
252
253
254static ssize_t channel_ce_count_show(struct device *dev,
255 struct device_attribute *mattr, char *data)
256{
257 struct csrow_info *csrow = to_csrow(dev);
258 unsigned chan = to_channel(mattr);
259 struct rank_info *rank = csrow->channels[chan];
260
261 return sprintf(data, "%u\n", rank->ce_count);
262}
263
264
265DEVICE_ATTR_LEGACY(size_mb, S_IRUGO, csrow_size_show, NULL);
266DEVICE_ATTR_LEGACY(dev_type, S_IRUGO, csrow_dev_type_show, NULL);
267DEVICE_ATTR_LEGACY(mem_type, S_IRUGO, csrow_mem_type_show, NULL);
268DEVICE_ATTR_LEGACY(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL);
269DEVICE_ATTR_LEGACY(ue_count, S_IRUGO, csrow_ue_count_show, NULL);
270DEVICE_ATTR_LEGACY(ce_count, S_IRUGO, csrow_ce_count_show, NULL);
271
272
273static struct attribute *csrow_attrs[] = {
274 &dev_attr_legacy_dev_type.attr,
275 &dev_attr_legacy_mem_type.attr,
276 &dev_attr_legacy_edac_mode.attr,
277 &dev_attr_legacy_size_mb.attr,
278 &dev_attr_legacy_ue_count.attr,
279 &dev_attr_legacy_ce_count.attr,
280 NULL,
281};
282
283static struct attribute_group csrow_attr_grp = {
284 .attrs = csrow_attrs,
285};
286
287static const struct attribute_group *csrow_attr_groups[] = {
288 &csrow_attr_grp,
289 NULL
290};
291
292static void csrow_attr_release(struct device *dev)
293{
294 struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);
295
296 edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev));
297 kfree(csrow);
298}
299
300static struct device_type csrow_attr_type = {
301 .groups = csrow_attr_groups,
302 .release = csrow_attr_release,
303};
304
305
306
307
308
309
310#define EDAC_NR_CHANNELS 6
311
312DEVICE_CHANNEL(ch0_dimm_label, S_IRUGO | S_IWUSR,
313 channel_dimm_label_show, channel_dimm_label_store, 0);
314DEVICE_CHANNEL(ch1_dimm_label, S_IRUGO | S_IWUSR,
315 channel_dimm_label_show, channel_dimm_label_store, 1);
316DEVICE_CHANNEL(ch2_dimm_label, S_IRUGO | S_IWUSR,
317 channel_dimm_label_show, channel_dimm_label_store, 2);
318DEVICE_CHANNEL(ch3_dimm_label, S_IRUGO | S_IWUSR,
319 channel_dimm_label_show, channel_dimm_label_store, 3);
320DEVICE_CHANNEL(ch4_dimm_label, S_IRUGO | S_IWUSR,
321 channel_dimm_label_show, channel_dimm_label_store, 4);
322DEVICE_CHANNEL(ch5_dimm_label, S_IRUGO | S_IWUSR,
323 channel_dimm_label_show, channel_dimm_label_store, 5);
324
325
326static struct attribute *dynamic_csrow_dimm_attr[] = {
327 &dev_attr_legacy_ch0_dimm_label.attr.attr,
328 &dev_attr_legacy_ch1_dimm_label.attr.attr,
329 &dev_attr_legacy_ch2_dimm_label.attr.attr,
330 &dev_attr_legacy_ch3_dimm_label.attr.attr,
331 &dev_attr_legacy_ch4_dimm_label.attr.attr,
332 &dev_attr_legacy_ch5_dimm_label.attr.attr,
333 NULL
334};
335
336
337DEVICE_CHANNEL(ch0_ce_count, S_IRUGO,
338 channel_ce_count_show, NULL, 0);
339DEVICE_CHANNEL(ch1_ce_count, S_IRUGO,
340 channel_ce_count_show, NULL, 1);
341DEVICE_CHANNEL(ch2_ce_count, S_IRUGO,
342 channel_ce_count_show, NULL, 2);
343DEVICE_CHANNEL(ch3_ce_count, S_IRUGO,
344 channel_ce_count_show, NULL, 3);
345DEVICE_CHANNEL(ch4_ce_count, S_IRUGO,
346 channel_ce_count_show, NULL, 4);
347DEVICE_CHANNEL(ch5_ce_count, S_IRUGO,
348 channel_ce_count_show, NULL, 5);
349
350
351static struct attribute *dynamic_csrow_ce_count_attr[] = {
352 &dev_attr_legacy_ch0_ce_count.attr.attr,
353 &dev_attr_legacy_ch1_ce_count.attr.attr,
354 &dev_attr_legacy_ch2_ce_count.attr.attr,
355 &dev_attr_legacy_ch3_ce_count.attr.attr,
356 &dev_attr_legacy_ch4_ce_count.attr.attr,
357 &dev_attr_legacy_ch5_ce_count.attr.attr,
358 NULL
359};
360
361static umode_t csrow_dev_is_visible(struct kobject *kobj,
362 struct attribute *attr, int idx)
363{
364 struct device *dev = kobj_to_dev(kobj);
365 struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);
366
367 if (idx >= csrow->nr_channels)
368 return 0;
369
370 if (!csrow->channels[idx]->dimm->nr_pages)
371 return 0;
372 return attr->mode;
373}
374
375
376static const struct attribute_group csrow_dev_dimm_group = {
377 .attrs = dynamic_csrow_dimm_attr,
378 .is_visible = csrow_dev_is_visible,
379};
380
381static const struct attribute_group csrow_dev_ce_count_group = {
382 .attrs = dynamic_csrow_ce_count_attr,
383 .is_visible = csrow_dev_is_visible,
384};
385
386static const struct attribute_group *csrow_dev_groups[] = {
387 &csrow_dev_dimm_group,
388 &csrow_dev_ce_count_group,
389 NULL
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 if (csrow->nr_channels > EDAC_NR_CHANNELS)
407 return -ENODEV;
408
409 csrow->dev.type = &csrow_attr_type;
410 csrow->dev.bus = mci->bus;
411 csrow->dev.groups = csrow_dev_groups;
412 device_initialize(&csrow->dev);
413 csrow->dev.parent = &mci->dev;
414 csrow->mci = mci;
415 dev_set_name(&csrow->dev, "csrow%d", index);
416 dev_set_drvdata(&csrow->dev, csrow);
417
418 edac_dbg(0, "creating (virtual) csrow node %s\n",
419 dev_name(&csrow->dev));
420
421 return device_add(&csrow->dev);
422}
423
424
425static int edac_create_csrow_objects(struct mem_ctl_info *mci)
426{
427 int err, i;
428 struct csrow_info *csrow;
429
430 for (i = 0; i < mci->nr_csrows; i++) {
431 csrow = mci->csrows[i];
432 if (!nr_pages_per_csrow(csrow))
433 continue;
434 err = edac_create_csrow_object(mci, mci->csrows[i], i);
435 if (err < 0) {
436 edac_dbg(1,
437 "failure: create csrow objects for csrow %d\n",
438 i);
439 goto error;
440 }
441 }
442 return 0;
443
444error:
445 for (--i; i >= 0; i--) {
446 csrow = mci->csrows[i];
447 if (!nr_pages_per_csrow(csrow))
448 continue;
449 put_device(&mci->csrows[i]->dev);
450 }
451
452 return err;
453}
454
455static void edac_delete_csrow_objects(struct mem_ctl_info *mci)
456{
457 int i;
458 struct csrow_info *csrow;
459
460 for (i = mci->nr_csrows - 1; i >= 0; i--) {
461 csrow = mci->csrows[i];
462 if (!nr_pages_per_csrow(csrow))
463 continue;
464 device_unregister(&mci->csrows[i]->dev);
465 }
466}
467#endif
468
469
470
471
472
473#define to_dimm(k) container_of(k, struct dimm_info, dev)
474
475
476static ssize_t dimmdev_location_show(struct device *dev,
477 struct device_attribute *mattr, char *data)
478{
479 struct dimm_info *dimm = to_dimm(dev);
480
481 return edac_dimm_info_location(dimm, data, PAGE_SIZE);
482}
483
484static ssize_t dimmdev_label_show(struct device *dev,
485 struct device_attribute *mattr, char *data)
486{
487 struct dimm_info *dimm = to_dimm(dev);
488
489
490 if (!dimm->label[0])
491 return 0;
492
493 return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n", dimm->label);
494}
495
496static ssize_t dimmdev_label_store(struct device *dev,
497 struct device_attribute *mattr,
498 const char *data,
499 size_t count)
500{
501 struct dimm_info *dimm = to_dimm(dev);
502
503 ssize_t max_size = 0;
504
505 max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
506 strncpy(dimm->label, data, max_size);
507 dimm->label[max_size] = '\0';
508
509 return max_size;
510}
511
512static ssize_t dimmdev_size_show(struct device *dev,
513 struct device_attribute *mattr, char *data)
514{
515 struct dimm_info *dimm = to_dimm(dev);
516
517 return sprintf(data, "%u\n", PAGES_TO_MiB(dimm->nr_pages));
518}
519
520static ssize_t dimmdev_mem_type_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, "%s\n", mem_types[dimm->mtype]);
526}
527
528static ssize_t dimmdev_dev_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", dev_types[dimm->dtype]);
534}
535
536static ssize_t dimmdev_edac_mode_show(struct device *dev,
537 struct device_attribute *mattr,
538 char *data)
539{
540 struct dimm_info *dimm = to_dimm(dev);
541
542 return sprintf(data, "%s\n", edac_caps[dimm->edac_mode]);
543}
544
545
546static DEVICE_ATTR(dimm_label, S_IRUGO | S_IWUSR,
547 dimmdev_label_show, dimmdev_label_store);
548static DEVICE_ATTR(dimm_location, S_IRUGO, dimmdev_location_show, NULL);
549static DEVICE_ATTR(size, S_IRUGO, dimmdev_size_show, NULL);
550static DEVICE_ATTR(dimm_mem_type, S_IRUGO, dimmdev_mem_type_show, NULL);
551static DEVICE_ATTR(dimm_dev_type, S_IRUGO, dimmdev_dev_type_show, NULL);
552static DEVICE_ATTR(dimm_edac_mode, S_IRUGO, dimmdev_edac_mode_show, NULL);
553
554
555static struct attribute *dimm_attrs[] = {
556 &dev_attr_dimm_label.attr,
557 &dev_attr_dimm_location.attr,
558 &dev_attr_size.attr,
559 &dev_attr_dimm_mem_type.attr,
560 &dev_attr_dimm_dev_type.attr,
561 &dev_attr_dimm_edac_mode.attr,
562 NULL,
563};
564
565static struct attribute_group dimm_attr_grp = {
566 .attrs = dimm_attrs,
567};
568
569static const struct attribute_group *dimm_attr_groups[] = {
570 &dimm_attr_grp,
571 NULL
572};
573
574static void dimm_attr_release(struct device *dev)
575{
576 struct dimm_info *dimm = container_of(dev, struct dimm_info, dev);
577
578 edac_dbg(1, "Releasing dimm device %s\n", dev_name(dev));
579 kfree(dimm);
580}
581
582static struct device_type dimm_attr_type = {
583 .groups = dimm_attr_groups,
584 .release = dimm_attr_release,
585};
586
587
588static int edac_create_dimm_object(struct mem_ctl_info *mci,
589 struct dimm_info *dimm,
590 int index)
591{
592 int err;
593 dimm->mci = mci;
594
595 dimm->dev.type = &dimm_attr_type;
596 dimm->dev.bus = mci->bus;
597 device_initialize(&dimm->dev);
598
599 dimm->dev.parent = &mci->dev;
600 if (mci->csbased)
601 dev_set_name(&dimm->dev, "rank%d", index);
602 else
603 dev_set_name(&dimm->dev, "dimm%d", index);
604 dev_set_drvdata(&dimm->dev, dimm);
605 pm_runtime_forbid(&mci->dev);
606
607 err = device_add(&dimm->dev);
608
609 edac_dbg(0, "creating rank/dimm device %s\n", dev_name(&dimm->dev));
610
611 return err;
612}
613
614
615
616
617
618#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
619
620static ssize_t mci_reset_counters_store(struct device *dev,
621 struct device_attribute *mattr,
622 const char *data, size_t count)
623{
624 struct mem_ctl_info *mci = to_mci(dev);
625 int cnt, row, chan, i;
626 mci->ue_mc = 0;
627 mci->ce_mc = 0;
628 mci->ue_noinfo_count = 0;
629 mci->ce_noinfo_count = 0;
630
631 for (row = 0; row < mci->nr_csrows; row++) {
632 struct csrow_info *ri = mci->csrows[row];
633
634 ri->ue_count = 0;
635 ri->ce_count = 0;
636
637 for (chan = 0; chan < ri->nr_channels; chan++)
638 ri->channels[chan]->ce_count = 0;
639 }
640
641 cnt = 1;
642 for (i = 0; i < mci->n_layers; i++) {
643 cnt *= mci->layers[i].size;
644 memset(mci->ce_per_layer[i], 0, cnt * sizeof(u32));
645 memset(mci->ue_per_layer[i], 0, cnt * sizeof(u32));
646 }
647
648 mci->start_time = jiffies;
649 return count;
650}
651
652
653
654
655
656
657
658
659
660
661static ssize_t mci_sdram_scrub_rate_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 unsigned long bandwidth = 0;
667 int new_bw = 0;
668
669 if (kstrtoul(data, 10, &bandwidth) < 0)
670 return -EINVAL;
671
672 new_bw = mci->set_sdram_scrub_rate(mci, bandwidth);
673 if (new_bw < 0) {
674 edac_printk(KERN_WARNING, EDAC_MC,
675 "Error setting scrub rate to: %lu\n", bandwidth);
676 return -EINVAL;
677 }
678
679 return count;
680}
681
682
683
684
685static ssize_t mci_sdram_scrub_rate_show(struct device *dev,
686 struct device_attribute *mattr,
687 char *data)
688{
689 struct mem_ctl_info *mci = to_mci(dev);
690 int bandwidth = 0;
691
692 bandwidth = mci->get_sdram_scrub_rate(mci);
693 if (bandwidth < 0) {
694 edac_printk(KERN_DEBUG, EDAC_MC, "Error reading scrub rate\n");
695 return bandwidth;
696 }
697
698 return sprintf(data, "%d\n", bandwidth);
699}
700
701
702static ssize_t mci_ue_count_show(struct device *dev,
703 struct device_attribute *mattr,
704 char *data)
705{
706 struct mem_ctl_info *mci = to_mci(dev);
707
708 return sprintf(data, "%d\n", mci->ue_mc);
709}
710
711static ssize_t mci_ce_count_show(struct device *dev,
712 struct device_attribute *mattr,
713 char *data)
714{
715 struct mem_ctl_info *mci = to_mci(dev);
716
717 return sprintf(data, "%d\n", mci->ce_mc);
718}
719
720static ssize_t mci_ce_noinfo_show(struct device *dev,
721 struct device_attribute *mattr,
722 char *data)
723{
724 struct mem_ctl_info *mci = to_mci(dev);
725
726 return sprintf(data, "%d\n", mci->ce_noinfo_count);
727}
728
729static ssize_t mci_ue_noinfo_show(struct device *dev,
730 struct device_attribute *mattr,
731 char *data)
732{
733 struct mem_ctl_info *mci = to_mci(dev);
734
735 return sprintf(data, "%d\n", mci->ue_noinfo_count);
736}
737
738static ssize_t mci_seconds_show(struct device *dev,
739 struct device_attribute *mattr,
740 char *data)
741{
742 struct mem_ctl_info *mci = to_mci(dev);
743
744 return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
745}
746
747static ssize_t mci_ctl_name_show(struct device *dev,
748 struct device_attribute *mattr,
749 char *data)
750{
751 struct mem_ctl_info *mci = to_mci(dev);
752
753 return sprintf(data, "%s\n", mci->ctl_name);
754}
755
756static ssize_t mci_size_mb_show(struct device *dev,
757 struct device_attribute *mattr,
758 char *data)
759{
760 struct mem_ctl_info *mci = to_mci(dev);
761 int total_pages = 0, csrow_idx, j;
762
763 for (csrow_idx = 0; csrow_idx < mci->nr_csrows; csrow_idx++) {
764 struct csrow_info *csrow = mci->csrows[csrow_idx];
765
766 for (j = 0; j < csrow->nr_channels; j++) {
767 struct dimm_info *dimm = csrow->channels[j]->dimm;
768
769 total_pages += dimm->nr_pages;
770 }
771 }
772
773 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
774}
775
776static ssize_t mci_max_location_show(struct device *dev,
777 struct device_attribute *mattr,
778 char *data)
779{
780 struct mem_ctl_info *mci = to_mci(dev);
781 int i;
782 char *p = data;
783
784 for (i = 0; i < mci->n_layers; i++) {
785 p += sprintf(p, "%s %d ",
786 edac_layer_name[mci->layers[i].type],
787 mci->layers[i].size - 1);
788 }
789
790 return p - data;
791}
792
793#ifdef CONFIG_EDAC_DEBUG
794static ssize_t edac_fake_inject_write(struct file *file,
795 const char __user *data,
796 size_t count, loff_t *ppos)
797{
798 struct device *dev = file->private_data;
799 struct mem_ctl_info *mci = to_mci(dev);
800 static enum hw_event_mc_err_type type;
801 u16 errcount = mci->fake_inject_count;
802
803 if (!errcount)
804 errcount = 1;
805
806 type = mci->fake_inject_ue ? HW_EVENT_ERR_UNCORRECTED
807 : HW_EVENT_ERR_CORRECTED;
808
809 printk(KERN_DEBUG
810 "Generating %d %s fake error%s to %d.%d.%d to test core handling. NOTE: this won't test the driver-specific decoding logic.\n",
811 errcount,
812 (type == HW_EVENT_ERR_UNCORRECTED) ? "UE" : "CE",
813 errcount > 1 ? "s" : "",
814 mci->fake_inject_layer[0],
815 mci->fake_inject_layer[1],
816 mci->fake_inject_layer[2]
817 );
818 edac_mc_handle_error(type, mci, errcount, 0, 0, 0,
819 mci->fake_inject_layer[0],
820 mci->fake_inject_layer[1],
821 mci->fake_inject_layer[2],
822 "FAKE ERROR", "for EDAC testing only");
823
824 return count;
825}
826
827static const struct file_operations debug_fake_inject_fops = {
828 .open = simple_open,
829 .write = edac_fake_inject_write,
830 .llseek = generic_file_llseek,
831};
832#endif
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
848DEVICE_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 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 struct device_type mci_attr_type = {
900 .groups = mci_attr_groups,
901 .release = mci_attr_release,
902};
903
904#ifdef CONFIG_EDAC_DEBUG
905static struct dentry *edac_debugfs;
906
907int __init edac_debugfs_init(void)
908{
909 edac_debugfs = debugfs_create_dir("edac", NULL);
910 if (IS_ERR(edac_debugfs)) {
911 edac_debugfs = NULL;
912 return -ENOMEM;
913 }
914 return 0;
915}
916
917void edac_debugfs_exit(void)
918{
919 debugfs_remove(edac_debugfs);
920}
921
922static int edac_create_debug_nodes(struct mem_ctl_info *mci)
923{
924 struct dentry *d, *parent;
925 char name[80];
926 int i;
927
928 if (!edac_debugfs)
929 return -ENODEV;
930
931 d = debugfs_create_dir(mci->dev.kobj.name, edac_debugfs);
932 if (!d)
933 return -ENOMEM;
934 parent = d;
935
936 for (i = 0; i < mci->n_layers; i++) {
937 sprintf(name, "fake_inject_%s",
938 edac_layer_name[mci->layers[i].type]);
939 d = debugfs_create_u8(name, S_IRUGO | S_IWUSR, parent,
940 &mci->fake_inject_layer[i]);
941 if (!d)
942 goto nomem;
943 }
944
945 d = debugfs_create_bool("fake_inject_ue", S_IRUGO | S_IWUSR, parent,
946 &mci->fake_inject_ue);
947 if (!d)
948 goto nomem;
949
950 d = debugfs_create_u16("fake_inject_count", S_IRUGO | S_IWUSR, parent,
951 &mci->fake_inject_count);
952 if (!d)
953 goto nomem;
954
955 d = debugfs_create_file("fake_inject", S_IWUSR, parent,
956 &mci->dev,
957 &debug_fake_inject_fops);
958 if (!d)
959 goto nomem;
960
961 mci->debugfs = parent;
962 return 0;
963nomem:
964 debugfs_remove(mci->debugfs);
965 return -ENOMEM;
966}
967#endif
968
969
970
971
972
973
974
975
976
977int edac_create_sysfs_mci_device(struct mem_ctl_info *mci,
978 const struct attribute_group **groups)
979{
980 int i, err;
981
982
983
984
985
986 mci->bus->name = kasprintf(GFP_KERNEL, "mc%d", mci->mc_idx);
987 if (!mci->bus->name)
988 return -ENOMEM;
989
990 edac_dbg(0, "creating bus %s\n", mci->bus->name);
991
992 err = bus_register(mci->bus);
993 if (err < 0)
994 goto fail_free_name;
995
996
997 mci->dev.type = &mci_attr_type;
998 device_initialize(&mci->dev);
999
1000 mci->dev.parent = mci_pdev;
1001 mci->dev.bus = mci->bus;
1002 mci->dev.groups = groups;
1003 dev_set_name(&mci->dev, "mc%d", mci->mc_idx);
1004 dev_set_drvdata(&mci->dev, mci);
1005 pm_runtime_forbid(&mci->dev);
1006
1007 edac_dbg(0, "creating device %s\n", dev_name(&mci->dev));
1008 err = device_add(&mci->dev);
1009 if (err < 0) {
1010 edac_dbg(1, "failure: create device %s\n", dev_name(&mci->dev));
1011 goto fail_unregister_bus;
1012 }
1013
1014
1015
1016
1017 for (i = 0; i < mci->tot_dimms; i++) {
1018 struct dimm_info *dimm = mci->dimms[i];
1019
1020 if (!dimm->nr_pages)
1021 continue;
1022
1023#ifdef CONFIG_EDAC_DEBUG
1024 edac_dbg(1, "creating dimm%d, located at ", i);
1025 if (edac_debug_level >= 1) {
1026 int lay;
1027 for (lay = 0; lay < mci->n_layers; lay++)
1028 printk(KERN_CONT "%s %d ",
1029 edac_layer_name[mci->layers[lay].type],
1030 dimm->location[lay]);
1031 printk(KERN_CONT "\n");
1032 }
1033#endif
1034 err = edac_create_dimm_object(mci, dimm, i);
1035 if (err) {
1036 edac_dbg(1, "failure: create dimm %d obj\n", i);
1037 goto fail_unregister_dimm;
1038 }
1039 }
1040
1041#ifdef CONFIG_EDAC_LEGACY_SYSFS
1042 err = edac_create_csrow_objects(mci);
1043 if (err < 0)
1044 goto fail_unregister_dimm;
1045#endif
1046
1047#ifdef CONFIG_EDAC_DEBUG
1048 edac_create_debug_nodes(mci);
1049#endif
1050 return 0;
1051
1052fail_unregister_dimm:
1053 for (i--; i >= 0; i--) {
1054 struct dimm_info *dimm = mci->dimms[i];
1055 if (!dimm->nr_pages)
1056 continue;
1057
1058 device_unregister(&dimm->dev);
1059 }
1060 device_unregister(&mci->dev);
1061fail_unregister_bus:
1062 bus_unregister(mci->bus);
1063fail_free_name:
1064 kfree(mci->bus->name);
1065 return err;
1066}
1067
1068
1069
1070
1071void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
1072{
1073 int i;
1074
1075 edac_dbg(0, "\n");
1076
1077#ifdef CONFIG_EDAC_DEBUG
1078 debugfs_remove(mci->debugfs);
1079#endif
1080#ifdef CONFIG_EDAC_LEGACY_SYSFS
1081 edac_delete_csrow_objects(mci);
1082#endif
1083
1084 for (i = 0; i < mci->tot_dimms; i++) {
1085 struct dimm_info *dimm = mci->dimms[i];
1086 if (dimm->nr_pages == 0)
1087 continue;
1088 edac_dbg(0, "removing device %s\n", dev_name(&dimm->dev));
1089 device_unregister(&dimm->dev);
1090 }
1091}
1092
1093void edac_unregister_sysfs(struct mem_ctl_info *mci)
1094{
1095 edac_dbg(1, "Unregistering device %s\n", dev_name(&mci->dev));
1096 device_unregister(&mci->dev);
1097 bus_unregister(mci->bus);
1098 kfree(mci->bus->name);
1099}
1100
1101static void mc_attr_release(struct device *dev)
1102{
1103
1104
1105
1106
1107
1108 edac_dbg(1, "Releasing device %s\n", dev_name(dev));
1109 kfree(dev);
1110}
1111
1112static struct device_type mc_attr_type = {
1113 .release = mc_attr_release,
1114};
1115
1116
1117
1118int __init edac_mc_sysfs_init(void)
1119{
1120 struct bus_type *edac_subsys;
1121 int err;
1122
1123
1124 edac_subsys = edac_get_sysfs_subsys();
1125 if (edac_subsys == NULL) {
1126 edac_dbg(1, "no edac_subsys\n");
1127 err = -EINVAL;
1128 goto out;
1129 }
1130
1131 mci_pdev = kzalloc(sizeof(*mci_pdev), GFP_KERNEL);
1132 if (!mci_pdev) {
1133 err = -ENOMEM;
1134 goto out_put_sysfs;
1135 }
1136
1137 mci_pdev->bus = edac_subsys;
1138 mci_pdev->type = &mc_attr_type;
1139 device_initialize(mci_pdev);
1140 dev_set_name(mci_pdev, "mc");
1141
1142 err = device_add(mci_pdev);
1143 if (err < 0)
1144 goto out_dev_free;
1145
1146 edac_dbg(0, "device %s created\n", dev_name(mci_pdev));
1147
1148 return 0;
1149
1150 out_dev_free:
1151 kfree(mci_pdev);
1152 out_put_sysfs:
1153 edac_put_sysfs_subsys();
1154 out:
1155 return err;
1156}
1157
1158void edac_mc_sysfs_exit(void)
1159{
1160 device_unregister(mci_pdev);
1161 edac_put_sysfs_subsys();
1162}
1163