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;
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 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 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 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, "Releasing csrow device %s\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 edac_dbg(0, "creating (virtual) csrow node %s\n",
418 dev_name(&csrow->dev));
420 err = device_add(&csrow->dev);
422 put_device(&csrow->dev);
427 /* Create a CSROW object under specifed edac_mc_device */
428 static int edac_create_csrow_objects(struct mem_ctl_info *mci)
431 struct csrow_info *csrow;
433 for (i = 0; i < mci->nr_csrows; i++) {
434 csrow = mci->csrows[i];
435 if (!nr_pages_per_csrow(csrow))
437 err = edac_create_csrow_object(mci, mci->csrows[i], i);
440 "failure: create csrow objects for csrow %d\n",
448 for (--i; i >= 0; i--) {
449 csrow = mci->csrows[i];
450 if (!nr_pages_per_csrow(csrow))
453 device_del(&mci->csrows[i]->dev);
459 static void edac_delete_csrow_objects(struct mem_ctl_info *mci)
462 struct csrow_info *csrow;
464 for (i = mci->nr_csrows - 1; i >= 0; i--) {
465 csrow = mci->csrows[i];
466 if (!nr_pages_per_csrow(csrow))
468 device_unregister(&mci->csrows[i]->dev);
474 * Per-dimm (or per-rank) devices
477 #define to_dimm(k) container_of(k, struct dimm_info, dev)
479 /* show/store functions for DIMM Label attributes */
480 static ssize_t dimmdev_location_show(struct device *dev,
481 struct device_attribute *mattr, char *data)
483 struct dimm_info *dimm = to_dimm(dev);
485 return edac_dimm_info_location(dimm, data, PAGE_SIZE);
488 static ssize_t dimmdev_label_show(struct device *dev,
489 struct device_attribute *mattr, char *data)
491 struct dimm_info *dimm = to_dimm(dev);
493 /* if field has not been initialized, there is nothing to send */
497 return snprintf(data, sizeof(dimm->label) + 1, "%s\n", dimm->label);
500 static ssize_t dimmdev_label_store(struct device *dev,
501 struct device_attribute *mattr,
505 struct dimm_info *dimm = to_dimm(dev);
506 size_t copy_count = count;
511 if (data[count - 1] == '\0' || data[count - 1] == '\n')
514 if (copy_count == 0 || copy_count >= sizeof(dimm->label))
517 strncpy(dimm->label, data, copy_count);
518 dimm->label[copy_count] = '\0';
523 static ssize_t dimmdev_size_show(struct device *dev,
524 struct device_attribute *mattr, char *data)
526 struct dimm_info *dimm = to_dimm(dev);
528 return sprintf(data, "%u\n", PAGES_TO_MiB(dimm->nr_pages));
531 static ssize_t dimmdev_mem_type_show(struct device *dev,
532 struct device_attribute *mattr, char *data)
534 struct dimm_info *dimm = to_dimm(dev);
536 return sprintf(data, "%s\n", edac_mem_types[dimm->mtype]);
539 static ssize_t dimmdev_dev_type_show(struct device *dev,
540 struct device_attribute *mattr, char *data)
542 struct dimm_info *dimm = to_dimm(dev);
544 return sprintf(data, "%s\n", dev_types[dimm->dtype]);
547 static ssize_t dimmdev_edac_mode_show(struct device *dev,
548 struct device_attribute *mattr,
551 struct dimm_info *dimm = to_dimm(dev);
553 return sprintf(data, "%s\n", edac_caps[dimm->edac_mode]);
556 static ssize_t dimmdev_ce_count_show(struct device *dev,
557 struct device_attribute *mattr,
560 struct dimm_info *dimm = to_dimm(dev);
564 off = EDAC_DIMM_OFF(dimm->mci->layers,
569 count = dimm->mci->ce_per_layer[dimm->mci->n_layers-1][off];
570 return sprintf(data, "%u\n", count);
573 static ssize_t dimmdev_ue_count_show(struct device *dev,
574 struct device_attribute *mattr,
577 struct dimm_info *dimm = to_dimm(dev);
581 off = EDAC_DIMM_OFF(dimm->mci->layers,
586 count = dimm->mci->ue_per_layer[dimm->mci->n_layers-1][off];
587 return sprintf(data, "%u\n", count);
590 /* dimm/rank attribute files */
591 static DEVICE_ATTR(dimm_label, S_IRUGO | S_IWUSR,
592 dimmdev_label_show, dimmdev_label_store);
593 static DEVICE_ATTR(dimm_location, S_IRUGO, dimmdev_location_show, NULL);
594 static DEVICE_ATTR(size, S_IRUGO, dimmdev_size_show, NULL);
595 static DEVICE_ATTR(dimm_mem_type, S_IRUGO, dimmdev_mem_type_show, NULL);
596 static DEVICE_ATTR(dimm_dev_type, S_IRUGO, dimmdev_dev_type_show, NULL);
597 static DEVICE_ATTR(dimm_edac_mode, S_IRUGO, dimmdev_edac_mode_show, NULL);
598 static DEVICE_ATTR(dimm_ce_count, S_IRUGO, dimmdev_ce_count_show, NULL);
599 static DEVICE_ATTR(dimm_ue_count, S_IRUGO, dimmdev_ue_count_show, NULL);
601 /* attributes of the dimm<id>/rank<id> object */
602 static struct attribute *dimm_attrs[] = {
603 &dev_attr_dimm_label.attr,
604 &dev_attr_dimm_location.attr,
606 &dev_attr_dimm_mem_type.attr,
607 &dev_attr_dimm_dev_type.attr,
608 &dev_attr_dimm_edac_mode.attr,
609 &dev_attr_dimm_ce_count.attr,
610 &dev_attr_dimm_ue_count.attr,
614 static const struct attribute_group dimm_attr_grp = {
618 static const struct attribute_group *dimm_attr_groups[] = {
623 static void dimm_attr_release(struct device *dev)
625 struct dimm_info *dimm = container_of(dev, struct dimm_info, dev);
627 edac_dbg(1, "Releasing dimm device %s\n", dev_name(dev));
631 static const struct device_type dimm_attr_type = {
632 .groups = dimm_attr_groups,
633 .release = dimm_attr_release,
636 /* Create a DIMM object under specifed memory controller device */
637 static int edac_create_dimm_object(struct mem_ctl_info *mci,
638 struct dimm_info *dimm,
644 dimm->dev.type = &dimm_attr_type;
645 device_initialize(&dimm->dev);
647 dimm->dev.parent = &mci->dev;
649 dev_set_name(&dimm->dev, "rank%d", index);
651 dev_set_name(&dimm->dev, "dimm%d", index);
652 dev_set_drvdata(&dimm->dev, dimm);
653 pm_runtime_forbid(&mci->dev);
655 err = device_add(&dimm->dev);
657 put_device(&dimm->dev);
659 edac_dbg(0, "created rank/dimm device %s\n", dev_name(&dimm->dev));
665 * Memory controller device
668 #define to_mci(k) container_of(k, struct mem_ctl_info, dev)
670 static ssize_t mci_reset_counters_store(struct device *dev,
671 struct device_attribute *mattr,
672 const char *data, size_t count)
674 struct mem_ctl_info *mci = to_mci(dev);
675 int cnt, row, chan, i;
678 mci->ue_noinfo_count = 0;
679 mci->ce_noinfo_count = 0;
681 for (row = 0; row < mci->nr_csrows; row++) {
682 struct csrow_info *ri = mci->csrows[row];
687 for (chan = 0; chan < ri->nr_channels; chan++)
688 ri->channels[chan]->ce_count = 0;
692 for (i = 0; i < mci->n_layers; i++) {
693 cnt *= mci->layers[i].size;
694 memset(mci->ce_per_layer[i], 0, cnt * sizeof(u32));
695 memset(mci->ue_per_layer[i], 0, cnt * sizeof(u32));
698 mci->start_time = jiffies;
702 /* Memory scrubbing interface:
704 * A MC driver can limit the scrubbing bandwidth based on the CPU type.
705 * Therefore, ->set_sdram_scrub_rate should be made to return the actual
706 * bandwidth that is accepted or 0 when scrubbing is to be disabled.
708 * Negative value still means that an error has occurred while setting
711 static ssize_t mci_sdram_scrub_rate_store(struct device *dev,
712 struct device_attribute *mattr,
713 const char *data, size_t count)
715 struct mem_ctl_info *mci = to_mci(dev);
716 unsigned long bandwidth = 0;
719 if (kstrtoul(data, 10, &bandwidth) < 0)
722 new_bw = mci->set_sdram_scrub_rate(mci, bandwidth);
724 edac_printk(KERN_WARNING, EDAC_MC,
725 "Error setting scrub rate to: %lu\n", bandwidth);
733 * ->get_sdram_scrub_rate() return value semantics same as above.
735 static ssize_t mci_sdram_scrub_rate_show(struct device *dev,
736 struct device_attribute *mattr,
739 struct mem_ctl_info *mci = to_mci(dev);
742 bandwidth = mci->get_sdram_scrub_rate(mci);
744 edac_printk(KERN_DEBUG, EDAC_MC, "Error reading scrub rate\n");
748 return sprintf(data, "%d\n", bandwidth);
751 /* default attribute files for the MCI object */
752 static ssize_t mci_ue_count_show(struct device *dev,
753 struct device_attribute *mattr,
756 struct mem_ctl_info *mci = to_mci(dev);
758 return sprintf(data, "%d\n", mci->ue_mc);
761 static ssize_t mci_ce_count_show(struct device *dev,
762 struct device_attribute *mattr,
765 struct mem_ctl_info *mci = to_mci(dev);
767 return sprintf(data, "%d\n", mci->ce_mc);
770 static ssize_t mci_ce_noinfo_show(struct device *dev,
771 struct device_attribute *mattr,
774 struct mem_ctl_info *mci = to_mci(dev);
776 return sprintf(data, "%d\n", mci->ce_noinfo_count);
779 static ssize_t mci_ue_noinfo_show(struct device *dev,
780 struct device_attribute *mattr,
783 struct mem_ctl_info *mci = to_mci(dev);
785 return sprintf(data, "%d\n", mci->ue_noinfo_count);
788 static ssize_t mci_seconds_show(struct device *dev,
789 struct device_attribute *mattr,
792 struct mem_ctl_info *mci = to_mci(dev);
794 return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
797 static ssize_t mci_ctl_name_show(struct device *dev,
798 struct device_attribute *mattr,
801 struct mem_ctl_info *mci = to_mci(dev);
803 return sprintf(data, "%s\n", mci->ctl_name);
806 static ssize_t mci_size_mb_show(struct device *dev,
807 struct device_attribute *mattr,
810 struct mem_ctl_info *mci = to_mci(dev);
811 int total_pages = 0, csrow_idx, j;
813 for (csrow_idx = 0; csrow_idx < mci->nr_csrows; csrow_idx++) {
814 struct csrow_info *csrow = mci->csrows[csrow_idx];
816 for (j = 0; j < csrow->nr_channels; j++) {
817 struct dimm_info *dimm = csrow->channels[j]->dimm;
819 total_pages += dimm->nr_pages;
823 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
826 static ssize_t mci_max_location_show(struct device *dev,
827 struct device_attribute *mattr,
830 struct mem_ctl_info *mci = to_mci(dev);
834 for (i = 0; i < mci->n_layers; i++) {
835 p += sprintf(p, "%s %d ",
836 edac_layer_name[mci->layers[i].type],
837 mci->layers[i].size - 1);
843 /* default Control file */
844 static DEVICE_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
846 /* default Attribute files */
847 static DEVICE_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
848 static DEVICE_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
849 static DEVICE_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
850 static DEVICE_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
851 static DEVICE_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
852 static DEVICE_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
853 static DEVICE_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
854 static DEVICE_ATTR(max_location, S_IRUGO, mci_max_location_show, NULL);
856 /* memory scrubber attribute file */
857 static DEVICE_ATTR(sdram_scrub_rate, 0, mci_sdram_scrub_rate_show,
858 mci_sdram_scrub_rate_store); /* umode set later in is_visible */
860 static struct attribute *mci_attrs[] = {
861 &dev_attr_reset_counters.attr,
862 &dev_attr_mc_name.attr,
863 &dev_attr_size_mb.attr,
864 &dev_attr_seconds_since_reset.attr,
865 &dev_attr_ue_noinfo_count.attr,
866 &dev_attr_ce_noinfo_count.attr,
867 &dev_attr_ue_count.attr,
868 &dev_attr_ce_count.attr,
869 &dev_attr_max_location.attr,
870 &dev_attr_sdram_scrub_rate.attr,
874 static umode_t mci_attr_is_visible(struct kobject *kobj,
875 struct attribute *attr, int idx)
877 struct device *dev = kobj_to_dev(kobj);
878 struct mem_ctl_info *mci = to_mci(dev);
881 if (attr != &dev_attr_sdram_scrub_rate.attr)
883 if (mci->get_sdram_scrub_rate)
885 if (mci->set_sdram_scrub_rate)
890 static const struct attribute_group mci_attr_grp = {
892 .is_visible = mci_attr_is_visible,
895 static const struct attribute_group *mci_attr_groups[] = {
900 static void mci_attr_release(struct device *dev)
902 struct mem_ctl_info *mci = container_of(dev, struct mem_ctl_info, dev);
904 edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev));
908 static const struct device_type mci_attr_type = {
909 .groups = mci_attr_groups,
910 .release = mci_attr_release,
914 * Create a new Memory Controller kobject instance,
915 * mc<id> under the 'mc' directory
921 int edac_create_sysfs_mci_device(struct mem_ctl_info *mci,
922 const struct attribute_group **groups)
926 /* get the /sys/devices/system/edac subsys reference */
927 mci->dev.type = &mci_attr_type;
928 device_initialize(&mci->dev);
930 mci->dev.parent = mci_pdev;
931 mci->dev.groups = groups;
932 dev_set_name(&mci->dev, "mc%d", mci->mc_idx);
933 dev_set_drvdata(&mci->dev, mci);
934 pm_runtime_forbid(&mci->dev);
936 edac_dbg(0, "creating device %s\n", dev_name(&mci->dev));
937 err = device_add(&mci->dev);
939 edac_dbg(1, "failure: create device %s\n", dev_name(&mci->dev));
940 put_device(&mci->dev);
945 * Create the dimm/rank devices
947 for (i = 0; i < mci->tot_dimms; i++) {
948 struct dimm_info *dimm = mci->dimms[i];
949 /* Only expose populated DIMMs */
953 #ifdef CONFIG_EDAC_DEBUG
954 edac_dbg(1, "creating dimm%d, located at ", i);
955 if (edac_debug_level >= 1) {
957 for (lay = 0; lay < mci->n_layers; lay++)
958 printk(KERN_CONT "%s %d ",
959 edac_layer_name[mci->layers[lay].type],
960 dimm->location[lay]);
961 printk(KERN_CONT "\n");
964 err = edac_create_dimm_object(mci, dimm, i);
966 edac_dbg(1, "failure: create dimm %d obj\n", i);
967 goto fail_unregister_dimm;
971 #ifdef CONFIG_EDAC_LEGACY_SYSFS
972 err = edac_create_csrow_objects(mci);
974 goto fail_unregister_dimm;
977 edac_create_debugfs_nodes(mci);
980 fail_unregister_dimm:
981 for (i--; i >= 0; i--) {
982 struct dimm_info *dimm = mci->dimms[i];
986 device_unregister(&dimm->dev);
988 device_unregister(&mci->dev);
995 * remove a Memory Controller instance
997 void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
1003 #ifdef CONFIG_EDAC_DEBUG
1004 edac_debugfs_remove_recursive(mci->debugfs);
1006 #ifdef CONFIG_EDAC_LEGACY_SYSFS
1007 edac_delete_csrow_objects(mci);
1010 for (i = 0; i < mci->tot_dimms; i++) {
1011 struct dimm_info *dimm = mci->dimms[i];
1012 if (dimm->nr_pages == 0)
1014 edac_dbg(0, "removing device %s\n", dev_name(&dimm->dev));
1015 device_unregister(&dimm->dev);
1019 void edac_unregister_sysfs(struct mem_ctl_info *mci)
1021 edac_dbg(1, "Unregistering device %s\n", dev_name(&mci->dev));
1022 device_unregister(&mci->dev);
1025 static void mc_attr_release(struct device *dev)
1028 * There's no container structure here, as this is just the mci
1029 * parent device, used to create the /sys/devices/mc sysfs node.
1030 * So, there are no attributes on it.
1032 edac_dbg(1, "Releasing device %s\n", dev_name(dev));
1036 static const struct device_type mc_attr_type = {
1037 .release = mc_attr_release,
1040 * Init/exit code for the module. Basically, creates/removes /sys/class/rc
1042 int __init edac_mc_sysfs_init(void)
1046 mci_pdev = kzalloc(sizeof(*mci_pdev), GFP_KERNEL);
1052 mci_pdev->bus = edac_get_sysfs_subsys();
1053 mci_pdev->type = &mc_attr_type;
1054 device_initialize(mci_pdev);
1055 dev_set_name(mci_pdev, "mc");
1057 err = device_add(mci_pdev);
1059 goto out_put_device;
1061 edac_dbg(0, "device %s created\n", dev_name(mci_pdev));
1066 put_device(mci_pdev);
1071 void edac_mc_sysfs_exit(void)
1073 device_unregister(mci_pdev);