2 * edac_mc kernel module
3 * (C) 2005-2007 Linux Networx (http://lnxi.com)
5 * This file may be distributed under the terms of the
6 * GNU General Public License.
8 * Written Doug Thompson <norsk5@xmission.com> www.softwarebitmaker.com
10 * (c) 2012-2013 - Mauro Carvalho Chehab
11 * The entire API were re-written, and ported to use struct device
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>
23 #include "edac_module.h"
25 /* MC EDAC Controls, setable by module parameter, and sysfs */
26 static int edac_mc_log_ue = 1;
27 static int edac_mc_log_ce = 1;
28 static int edac_mc_panic_on_ue;
29 static unsigned int edac_mc_poll_msec = 1000;
31 /* Getter functions for above */
32 int edac_mc_get_log_ue(void)
34 return edac_mc_log_ue;
37 int edac_mc_get_log_ce(void)
39 return edac_mc_log_ce;
42 int edac_mc_get_panic_on_ue(void)
44 return edac_mc_panic_on_ue;
47 /* this is temporary */
48 unsigned int edac_mc_get_poll_msec(void)
50 return edac_mc_poll_msec;
53 static int edac_set_poll_msec(const char *val, const struct kernel_param *kp)
61 ret = kstrtouint(val, 0, &i);
68 *((unsigned int *)kp->arg) = i;
70 /* notify edac_mc engine to reset the poll period */
71 edac_mc_reset_delay_period(i);
76 /* Parameter declarations for above */
77 module_param(edac_mc_panic_on_ue, int, 0644);
78 MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
79 module_param(edac_mc_log_ue, int, 0644);
80 MODULE_PARM_DESC(edac_mc_log_ue,
81 "Log uncorrectable error to console: 0=off 1=on");
82 module_param(edac_mc_log_ce, int, 0644);
83 MODULE_PARM_DESC(edac_mc_log_ce,
84 "Log correctable error to console: 0=off 1=on");
85 module_param_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_uint,
86 &edac_mc_poll_msec, 0644);
87 MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
89 static struct device *mci_pdev;
92 * various constants for Memory Controllers
94 static const char * const dev_types[] = {
95 [DEV_UNKNOWN] = "Unknown",
105 static const char * const edac_caps[] = {
106 [EDAC_UNKNOWN] = "Unknown",
107 [EDAC_NONE] = "None",
108 [EDAC_RESERVED] = "Reserved",
109 [EDAC_PARITY] = "PARITY",
111 [EDAC_SECDED] = "SECDED",
112 [EDAC_S2ECD2ED] = "S2ECD2ED",
113 [EDAC_S4ECD4ED] = "S4ECD4ED",
114 [EDAC_S8ECD8ED] = "S8ECD8ED",
115 [EDAC_S16ECD16ED] = "S16ECD16ED"
118 #ifdef CONFIG_EDAC_LEGACY_SYSFS
120 * EDAC sysfs CSROW data structures and methods
123 #define to_csrow(k) container_of(k, struct csrow_info, dev)
126 * We need it to avoid namespace conflicts between the legacy API
127 * and the per-dimm/per-rank one
129 #define DEVICE_ATTR_LEGACY(_name, _mode, _show, _store) \
130 static struct device_attribute dev_attr_legacy_##_name = __ATTR(_name, _mode, _show, _store)
132 struct dev_ch_attribute {
133 struct device_attribute attr;
134 unsigned int channel;
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) }
141 #define to_channel(k) (container_of(k, struct dev_ch_attribute, attr)->channel)
143 /* Set of more default csrow<id> attribute show/store functions */
144 static ssize_t csrow_ue_count_show(struct device *dev,
145 struct device_attribute *mattr, char *data)
147 struct csrow_info *csrow = to_csrow(dev);
149 return sprintf(data, "%u\n", csrow->ue_count);
152 static ssize_t csrow_ce_count_show(struct device *dev,
153 struct device_attribute *mattr, char *data)
155 struct csrow_info *csrow = to_csrow(dev);
157 return sprintf(data, "%u\n", csrow->ce_count);
160 static ssize_t csrow_size_show(struct device *dev,
161 struct device_attribute *mattr, char *data)
163 struct csrow_info *csrow = to_csrow(dev);
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));
172 static ssize_t csrow_mem_type_show(struct device *dev,
173 struct device_attribute *mattr, char *data)
175 struct csrow_info *csrow = to_csrow(dev);
177 return sprintf(data, "%s\n", edac_mem_types[csrow->channels[0]->dimm->mtype]);
180 static ssize_t csrow_dev_type_show(struct device *dev,
181 struct device_attribute *mattr, char *data)
183 struct csrow_info *csrow = to_csrow(dev);
185 return sprintf(data, "%s\n", dev_types[csrow->channels[0]->dimm->dtype]);
188 static ssize_t csrow_edac_mode_show(struct device *dev,
189 struct device_attribute *mattr,
192 struct csrow_info *csrow = to_csrow(dev);
194 return sprintf(data, "%s\n", edac_caps[csrow->channels[0]->dimm->edac_mode]);
197 /* show/store functions for DIMM Label attributes */
198 static ssize_t channel_dimm_label_show(struct device *dev,
199 struct device_attribute *mattr,
202 struct csrow_info *csrow = to_csrow(dev);
203 unsigned int chan = to_channel(mattr);
204 struct rank_info *rank = csrow->channels[chan];
206 /* if field has not been initialized, there is nothing to send */
207 if (!rank->dimm->label[0])
210 return snprintf(data, sizeof(rank->dimm->label) + 1, "%s\n",
214 static ssize_t channel_dimm_label_store(struct device *dev,
215 struct device_attribute *mattr,
216 const char *data, size_t count)
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;
226 if (data[count - 1] == '\0' || data[count - 1] == '\n')
229 if (copy_count == 0 || copy_count >= sizeof(rank->dimm->label))
232 strncpy(rank->dimm->label, data, copy_count);
233 rank->dimm->label[copy_count] = '\0';
238 /* show function for dynamic chX_ce_count attribute */
239 static ssize_t channel_ce_count_show(struct device *dev,
240 struct device_attribute *mattr, char *data)
242 struct csrow_info *csrow = to_csrow(dev);
243 unsigned int chan = to_channel(mattr);
244 struct rank_info *rank = csrow->channels[chan];
246 return sprintf(data, "%u\n", rank->ce_count);
249 /* cwrow<id>/attribute files */
250 DEVICE_ATTR_LEGACY(size_mb, S_IRUGO, csrow_size_show, NULL);
251 DEVICE_ATTR_LEGACY(dev_type, S_IRUGO, csrow_dev_type_show, NULL);
252 DEVICE_ATTR_LEGACY(mem_type, S_IRUGO, csrow_mem_type_show, NULL);
253 DEVICE_ATTR_LEGACY(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL);
254 DEVICE_ATTR_LEGACY(ue_count, S_IRUGO, csrow_ue_count_show, NULL);
255 DEVICE_ATTR_LEGACY(ce_count, S_IRUGO, csrow_ce_count_show, NULL);
257 /* default attributes of the CSROW<id> object */
258 static 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,
268 static const struct attribute_group csrow_attr_grp = {
269 .attrs = csrow_attrs,
272 static const struct attribute_group *csrow_attr_groups[] = {
277 static void csrow_attr_release(struct device *dev)
279 struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);
281 edac_dbg(1, "device %s released\n", dev_name(dev));
285 static const struct device_type csrow_attr_type = {
286 .groups = csrow_attr_groups,
287 .release = csrow_attr_release,
291 * possible dynamic channel DIMM Label attribute files
294 DEVICE_CHANNEL(ch0_dimm_label, S_IRUGO | S_IWUSR,
295 channel_dimm_label_show, channel_dimm_label_store, 0);
296 DEVICE_CHANNEL(ch1_dimm_label, S_IRUGO | S_IWUSR,
297 channel_dimm_label_show, channel_dimm_label_store, 1);
298 DEVICE_CHANNEL(ch2_dimm_label, S_IRUGO | S_IWUSR,
299 channel_dimm_label_show, channel_dimm_label_store, 2);
300 DEVICE_CHANNEL(ch3_dimm_label, S_IRUGO | S_IWUSR,
301 channel_dimm_label_show, channel_dimm_label_store, 3);
302 DEVICE_CHANNEL(ch4_dimm_label, S_IRUGO | S_IWUSR,
303 channel_dimm_label_show, channel_dimm_label_store, 4);
304 DEVICE_CHANNEL(ch5_dimm_label, S_IRUGO | S_IWUSR,
305 channel_dimm_label_show, channel_dimm_label_store, 5);
306 DEVICE_CHANNEL(ch6_dimm_label, S_IRUGO | S_IWUSR,
307 channel_dimm_label_show, channel_dimm_label_store, 6);
308 DEVICE_CHANNEL(ch7_dimm_label, S_IRUGO | S_IWUSR,
309 channel_dimm_label_show, channel_dimm_label_store, 7);
311 /* Total possible dynamic DIMM Label attribute file table */
312 static 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,
324 /* possible dynamic channel ce_count attribute files */
325 DEVICE_CHANNEL(ch0_ce_count, S_IRUGO,
326 channel_ce_count_show, NULL, 0);
327 DEVICE_CHANNEL(ch1_ce_count, S_IRUGO,
328 channel_ce_count_show, NULL, 1);
329 DEVICE_CHANNEL(ch2_ce_count, S_IRUGO,
330 channel_ce_count_show, NULL, 2);
331 DEVICE_CHANNEL(ch3_ce_count, S_IRUGO,
332 channel_ce_count_show, NULL, 3);
333 DEVICE_CHANNEL(ch4_ce_count, S_IRUGO,
334 channel_ce_count_show, NULL, 4);
335 DEVICE_CHANNEL(ch5_ce_count, S_IRUGO,
336 channel_ce_count_show, NULL, 5);
337 DEVICE_CHANNEL(ch6_ce_count, S_IRUGO,
338 channel_ce_count_show, NULL, 6);
339 DEVICE_CHANNEL(ch7_ce_count, S_IRUGO,
340 channel_ce_count_show, NULL, 7);
342 /* Total possible dynamic ce_count attribute file table */
343 static 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,
355 static umode_t csrow_dev_is_visible(struct kobject *kobj,
356 struct attribute *attr, int idx)
358 struct device *dev = kobj_to_dev(kobj);
359 struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);
361 if (idx >= csrow->nr_channels)
364 if (idx >= ARRAY_SIZE(dynamic_csrow_ce_count_attr) - 1) {
365 WARN_ONCE(1, "idx: %d\n", idx);
369 /* Only expose populated DIMMs */
370 if (!csrow->channels[idx]->dimm->nr_pages)
377 static const struct attribute_group csrow_dev_dimm_group = {
378 .attrs = dynamic_csrow_dimm_attr,
379 .is_visible = csrow_dev_is_visible,
382 static const struct attribute_group csrow_dev_ce_count_group = {
383 .attrs = dynamic_csrow_ce_count_attr,
384 .is_visible = csrow_dev_is_visible,
387 static const struct attribute_group *csrow_dev_groups[] = {
388 &csrow_dev_dimm_group,
389 &csrow_dev_ce_count_group,
393 static inline int nr_pages_per_csrow(struct csrow_info *csrow)
395 int chan, nr_pages = 0;
397 for (chan = 0; chan < csrow->nr_channels; chan++)
398 nr_pages += csrow->channels[chan]->dimm->nr_pages;
403 /* Create a CSROW object under specifed edac_mc_device */
404 static int edac_create_csrow_object(struct mem_ctl_info *mci,
405 struct csrow_info *csrow, int index)
409 csrow->dev.type = &csrow_attr_type;
410 csrow->dev.groups = csrow_dev_groups;
411 device_initialize(&csrow->dev);
412 csrow->dev.parent = &mci->dev;
414 dev_set_name(&csrow->dev, "csrow%d", index);
415 dev_set_drvdata(&csrow->dev, csrow);
417 err = device_add(&csrow->dev);
419 edac_dbg(1, "failure: create device %s\n", dev_name(&csrow->dev));
420 put_device(&csrow->dev);
424 edac_dbg(0, "device %s created\n", dev_name(&csrow->dev));
429 /* Create a CSROW object under specifed edac_mc_device */
430 static int edac_create_csrow_objects(struct mem_ctl_info *mci)
433 struct csrow_info *csrow;
435 for (i = 0; i < mci->nr_csrows; i++) {
436 csrow = mci->csrows[i];
437 if (!nr_pages_per_csrow(csrow))
439 err = edac_create_csrow_object(mci, mci->csrows[i], i);
446 for (--i; i >= 0; i--) {
447 csrow = mci->csrows[i];
448 if (!nr_pages_per_csrow(csrow))
451 device_del(&mci->csrows[i]->dev);
457 static void edac_delete_csrow_objects(struct mem_ctl_info *mci)
460 struct csrow_info *csrow;
462 for (i = mci->nr_csrows - 1; i >= 0; i--) {
463 csrow = mci->csrows[i];
464 if (!nr_pages_per_csrow(csrow))
466 device_unregister(&mci->csrows[i]->dev);
472 * Per-dimm (or per-rank) devices
475 #define to_dimm(k) container_of(k, struct dimm_info, dev)
477 /* show/store functions for DIMM Label attributes */
478 static ssize_t dimmdev_location_show(struct device *dev,
479 struct device_attribute *mattr, char *data)
481 struct dimm_info *dimm = to_dimm(dev);
483 return edac_dimm_info_location(dimm, data, PAGE_SIZE);
486 static ssize_t dimmdev_label_show(struct device *dev,
487 struct device_attribute *mattr, char *data)
489 struct dimm_info *dimm = to_dimm(dev);
491 /* if field has not been initialized, there is nothing to send */
495 return snprintf(data, sizeof(dimm->label) + 1, "%s\n", dimm->label);
498 static ssize_t dimmdev_label_store(struct device *dev,
499 struct device_attribute *mattr,
503 struct dimm_info *dimm = to_dimm(dev);
504 size_t copy_count = count;
509 if (data[count - 1] == '\0' || data[count - 1] == '\n')
512 if (copy_count == 0 || copy_count >= sizeof(dimm->label))
515 strncpy(dimm->label, data, copy_count);
516 dimm->label[copy_count] = '\0';
521 static ssize_t dimmdev_size_show(struct device *dev,
522 struct device_attribute *mattr, char *data)
524 struct dimm_info *dimm = to_dimm(dev);
526 return sprintf(data, "%u\n", PAGES_TO_MiB(dimm->nr_pages));
529 static ssize_t dimmdev_mem_type_show(struct device *dev,
530 struct device_attribute *mattr, char *data)
532 struct dimm_info *dimm = to_dimm(dev);
534 return sprintf(data, "%s\n", edac_mem_types[dimm->mtype]);
537 static ssize_t dimmdev_dev_type_show(struct device *dev,
538 struct device_attribute *mattr, char *data)
540 struct dimm_info *dimm = to_dimm(dev);
542 return sprintf(data, "%s\n", dev_types[dimm->dtype]);
545 static ssize_t dimmdev_edac_mode_show(struct device *dev,
546 struct device_attribute *mattr,
549 struct dimm_info *dimm = to_dimm(dev);
551 return sprintf(data, "%s\n", edac_caps[dimm->edac_mode]);
554 static ssize_t dimmdev_ce_count_show(struct device *dev,
555 struct device_attribute *mattr,
558 struct dimm_info *dimm = to_dimm(dev);
562 off = EDAC_DIMM_OFF(dimm->mci->layers,
567 count = dimm->mci->ce_per_layer[dimm->mci->n_layers-1][off];
568 return sprintf(data, "%u\n", count);
571 static ssize_t dimmdev_ue_count_show(struct device *dev,
572 struct device_attribute *mattr,
575 struct dimm_info *dimm = to_dimm(dev);
579 off = EDAC_DIMM_OFF(dimm->mci->layers,
584 count = dimm->mci->ue_per_layer[dimm->mci->n_layers-1][off];
585 return sprintf(data, "%u\n", count);
588 /* dimm/rank attribute files */
589 static DEVICE_ATTR(dimm_label, S_IRUGO | S_IWUSR,
590 dimmdev_label_show, dimmdev_label_store);
591 static DEVICE_ATTR(dimm_location, S_IRUGO, dimmdev_location_show, NULL);
592 static DEVICE_ATTR(size, S_IRUGO, dimmdev_size_show, NULL);
593 static DEVICE_ATTR(dimm_mem_type, S_IRUGO, dimmdev_mem_type_show, NULL);
594 static DEVICE_ATTR(dimm_dev_type, S_IRUGO, dimmdev_dev_type_show, NULL);
595 static DEVICE_ATTR(dimm_edac_mode, S_IRUGO, dimmdev_edac_mode_show, NULL);
596 static DEVICE_ATTR(dimm_ce_count, S_IRUGO, dimmdev_ce_count_show, NULL);
597 static DEVICE_ATTR(dimm_ue_count, S_IRUGO, dimmdev_ue_count_show, NULL);
599 /* attributes of the dimm<id>/rank<id> object */
600 static struct attribute *dimm_attrs[] = {
601 &dev_attr_dimm_label.attr,
602 &dev_attr_dimm_location.attr,
604 &dev_attr_dimm_mem_type.attr,
605 &dev_attr_dimm_dev_type.attr,
606 &dev_attr_dimm_edac_mode.attr,
607 &dev_attr_dimm_ce_count.attr,
608 &dev_attr_dimm_ue_count.attr,
612 static const struct attribute_group dimm_attr_grp = {
616 static const struct attribute_group *dimm_attr_groups[] = {
621 static void dimm_attr_release(struct device *dev)
623 struct dimm_info *dimm = container_of(dev, struct dimm_info, dev);
625 edac_dbg(1, "device %s released\n", dev_name(dev));
629 static const struct device_type dimm_attr_type = {
630 .groups = dimm_attr_groups,
631 .release = dimm_attr_release,
634 /* Create a DIMM object under specifed memory controller device */
635 static int edac_create_dimm_object(struct mem_ctl_info *mci,
636 struct dimm_info *dimm,
642 dimm->dev.type = &dimm_attr_type;
643 device_initialize(&dimm->dev);
645 dimm->dev.parent = &mci->dev;
647 dev_set_name(&dimm->dev, "rank%d", index);
649 dev_set_name(&dimm->dev, "dimm%d", index);
650 dev_set_drvdata(&dimm->dev, dimm);
651 pm_runtime_forbid(&mci->dev);
653 err = device_add(&dimm->dev);
655 edac_dbg(1, "failure: create device %s\n", dev_name(&dimm->dev));
656 put_device(&dimm->dev);
660 if (IS_ENABLED(CONFIG_EDAC_DEBUG)) {
663 edac_dimm_info_location(dimm, location, sizeof(location));
664 edac_dbg(0, "device %s created at location %s\n",
665 dev_name(&dimm->dev), location);
672 * Memory controller device
675 #define to_mci(k) container_of(k, struct mem_ctl_info, dev)
677 static ssize_t mci_reset_counters_store(struct device *dev,
678 struct device_attribute *mattr,
679 const char *data, size_t count)
681 struct mem_ctl_info *mci = to_mci(dev);
682 int cnt, row, chan, i;
685 mci->ue_noinfo_count = 0;
686 mci->ce_noinfo_count = 0;
688 for (row = 0; row < mci->nr_csrows; row++) {
689 struct csrow_info *ri = mci->csrows[row];
694 for (chan = 0; chan < ri->nr_channels; chan++)
695 ri->channels[chan]->ce_count = 0;
699 for (i = 0; i < mci->n_layers; i++) {
700 cnt *= mci->layers[i].size;
701 memset(mci->ce_per_layer[i], 0, cnt * sizeof(u32));
702 memset(mci->ue_per_layer[i], 0, cnt * sizeof(u32));
705 mci->start_time = jiffies;
709 /* Memory scrubbing interface:
711 * A MC driver can limit the scrubbing bandwidth based on the CPU type.
712 * Therefore, ->set_sdram_scrub_rate should be made to return the actual
713 * bandwidth that is accepted or 0 when scrubbing is to be disabled.
715 * Negative value still means that an error has occurred while setting
718 static ssize_t mci_sdram_scrub_rate_store(struct device *dev,
719 struct device_attribute *mattr,
720 const char *data, size_t count)
722 struct mem_ctl_info *mci = to_mci(dev);
723 unsigned long bandwidth = 0;
726 if (kstrtoul(data, 10, &bandwidth) < 0)
729 new_bw = mci->set_sdram_scrub_rate(mci, bandwidth);
731 edac_printk(KERN_WARNING, EDAC_MC,
732 "Error setting scrub rate to: %lu\n", bandwidth);
740 * ->get_sdram_scrub_rate() return value semantics same as above.
742 static ssize_t mci_sdram_scrub_rate_show(struct device *dev,
743 struct device_attribute *mattr,
746 struct mem_ctl_info *mci = to_mci(dev);
749 bandwidth = mci->get_sdram_scrub_rate(mci);
751 edac_printk(KERN_DEBUG, EDAC_MC, "Error reading scrub rate\n");
755 return sprintf(data, "%d\n", bandwidth);
758 /* default attribute files for the MCI object */
759 static ssize_t mci_ue_count_show(struct device *dev,
760 struct device_attribute *mattr,
763 struct mem_ctl_info *mci = to_mci(dev);
765 return sprintf(data, "%d\n", mci->ue_mc);
768 static ssize_t mci_ce_count_show(struct device *dev,
769 struct device_attribute *mattr,
772 struct mem_ctl_info *mci = to_mci(dev);
774 return sprintf(data, "%d\n", mci->ce_mc);
777 static ssize_t mci_ce_noinfo_show(struct device *dev,
778 struct device_attribute *mattr,
781 struct mem_ctl_info *mci = to_mci(dev);
783 return sprintf(data, "%d\n", mci->ce_noinfo_count);
786 static ssize_t mci_ue_noinfo_show(struct device *dev,
787 struct device_attribute *mattr,
790 struct mem_ctl_info *mci = to_mci(dev);
792 return sprintf(data, "%d\n", mci->ue_noinfo_count);
795 static ssize_t mci_seconds_show(struct device *dev,
796 struct device_attribute *mattr,
799 struct mem_ctl_info *mci = to_mci(dev);
801 return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
804 static ssize_t mci_ctl_name_show(struct device *dev,
805 struct device_attribute *mattr,
808 struct mem_ctl_info *mci = to_mci(dev);
810 return sprintf(data, "%s\n", mci->ctl_name);
813 static ssize_t mci_size_mb_show(struct device *dev,
814 struct device_attribute *mattr,
817 struct mem_ctl_info *mci = to_mci(dev);
818 int total_pages = 0, csrow_idx, j;
820 for (csrow_idx = 0; csrow_idx < mci->nr_csrows; csrow_idx++) {
821 struct csrow_info *csrow = mci->csrows[csrow_idx];
823 for (j = 0; j < csrow->nr_channels; j++) {
824 struct dimm_info *dimm = csrow->channels[j]->dimm;
826 total_pages += dimm->nr_pages;
830 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
833 static ssize_t mci_max_location_show(struct device *dev,
834 struct device_attribute *mattr,
837 struct mem_ctl_info *mci = to_mci(dev);
841 for (i = 0; i < mci->n_layers; i++) {
842 p += sprintf(p, "%s %d ",
843 edac_layer_name[mci->layers[i].type],
844 mci->layers[i].size - 1);
850 /* default Control file */
851 static DEVICE_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
853 /* default Attribute files */
854 static DEVICE_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
855 static DEVICE_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
856 static DEVICE_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
857 static DEVICE_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
858 static DEVICE_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
859 static DEVICE_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
860 static DEVICE_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
861 static DEVICE_ATTR(max_location, S_IRUGO, mci_max_location_show, NULL);
863 /* memory scrubber attribute file */
864 static DEVICE_ATTR(sdram_scrub_rate, 0, mci_sdram_scrub_rate_show,
865 mci_sdram_scrub_rate_store); /* umode set later in is_visible */
867 static struct attribute *mci_attrs[] = {
868 &dev_attr_reset_counters.attr,
869 &dev_attr_mc_name.attr,
870 &dev_attr_size_mb.attr,
871 &dev_attr_seconds_since_reset.attr,
872 &dev_attr_ue_noinfo_count.attr,
873 &dev_attr_ce_noinfo_count.attr,
874 &dev_attr_ue_count.attr,
875 &dev_attr_ce_count.attr,
876 &dev_attr_max_location.attr,
877 &dev_attr_sdram_scrub_rate.attr,
881 static umode_t mci_attr_is_visible(struct kobject *kobj,
882 struct attribute *attr, int idx)
884 struct device *dev = kobj_to_dev(kobj);
885 struct mem_ctl_info *mci = to_mci(dev);
888 if (attr != &dev_attr_sdram_scrub_rate.attr)
890 if (mci->get_sdram_scrub_rate)
892 if (mci->set_sdram_scrub_rate)
897 static const struct attribute_group mci_attr_grp = {
899 .is_visible = mci_attr_is_visible,
902 static const struct attribute_group *mci_attr_groups[] = {
907 static void mci_attr_release(struct device *dev)
909 struct mem_ctl_info *mci = container_of(dev, struct mem_ctl_info, dev);
911 edac_dbg(1, "device %s released\n", dev_name(dev));
915 static const struct device_type mci_attr_type = {
916 .groups = mci_attr_groups,
917 .release = mci_attr_release,
921 * Create a new Memory Controller kobject instance,
922 * mc<id> under the 'mc' directory
928 int edac_create_sysfs_mci_device(struct mem_ctl_info *mci,
929 const struct attribute_group **groups)
933 /* get the /sys/devices/system/edac subsys reference */
934 mci->dev.type = &mci_attr_type;
935 device_initialize(&mci->dev);
937 mci->dev.parent = mci_pdev;
938 mci->dev.groups = groups;
939 dev_set_name(&mci->dev, "mc%d", mci->mc_idx);
940 dev_set_drvdata(&mci->dev, mci);
941 pm_runtime_forbid(&mci->dev);
943 err = device_add(&mci->dev);
945 edac_dbg(1, "failure: create device %s\n", dev_name(&mci->dev));
946 put_device(&mci->dev);
950 edac_dbg(0, "device %s created\n", dev_name(&mci->dev));
953 * Create the dimm/rank devices
955 for (i = 0; i < mci->tot_dimms; i++) {
956 struct dimm_info *dimm = mci->dimms[i];
957 /* Only expose populated DIMMs */
961 err = edac_create_dimm_object(mci, dimm, i);
963 goto fail_unregister_dimm;
966 #ifdef CONFIG_EDAC_LEGACY_SYSFS
967 err = edac_create_csrow_objects(mci);
969 goto fail_unregister_dimm;
972 edac_create_debugfs_nodes(mci);
975 fail_unregister_dimm:
976 for (i--; i >= 0; i--) {
977 struct dimm_info *dimm = mci->dimms[i];
981 device_unregister(&dimm->dev);
983 device_unregister(&mci->dev);
989 * remove a Memory Controller instance
991 void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
997 #ifdef CONFIG_EDAC_DEBUG
998 edac_debugfs_remove_recursive(mci->debugfs);
1000 #ifdef CONFIG_EDAC_LEGACY_SYSFS
1001 edac_delete_csrow_objects(mci);
1004 for (i = 0; i < mci->tot_dimms; i++) {
1005 struct dimm_info *dimm = mci->dimms[i];
1006 if (dimm->nr_pages == 0)
1008 edac_dbg(1, "unregistering device %s\n", dev_name(&dimm->dev));
1009 device_unregister(&dimm->dev);
1013 void edac_unregister_sysfs(struct mem_ctl_info *mci)
1015 edac_dbg(1, "unregistering device %s\n", dev_name(&mci->dev));
1016 device_unregister(&mci->dev);
1019 static void mc_attr_release(struct device *dev)
1022 * There's no container structure here, as this is just the mci
1023 * parent device, used to create the /sys/devices/mc sysfs node.
1024 * So, there are no attributes on it.
1026 edac_dbg(1, "device %s released\n", dev_name(dev));
1030 static const struct device_type mc_attr_type = {
1031 .release = mc_attr_release,
1034 * Init/exit code for the module. Basically, creates/removes /sys/class/rc
1036 int __init edac_mc_sysfs_init(void)
1040 mci_pdev = kzalloc(sizeof(*mci_pdev), GFP_KERNEL);
1044 mci_pdev->bus = edac_get_sysfs_subsys();
1045 mci_pdev->type = &mc_attr_type;
1046 device_initialize(mci_pdev);
1047 dev_set_name(mci_pdev, "mc");
1049 err = device_add(mci_pdev);
1051 edac_dbg(1, "failure: create device %s\n", dev_name(mci_pdev));
1052 put_device(mci_pdev);
1056 edac_dbg(0, "device %s created\n", dev_name(mci_pdev));
1061 void edac_mc_sysfs_exit(void)
1063 device_unregister(mci_pdev);