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
12 #include <linux/ctype.h>
13 #include <linux/bug.h>
15 #include "edac_core.h"
16 #include "edac_module.h"
19 /* MC EDAC Controls, setable by module parameter, and sysfs */
20 static int edac_mc_log_ue = 1;
21 static int edac_mc_log_ce = 1;
22 static int edac_mc_panic_on_ue;
23 static int edac_mc_poll_msec = 1000;
25 /* Getter functions for above */
26 int edac_mc_get_log_ue(void)
28 return edac_mc_log_ue;
31 int edac_mc_get_log_ce(void)
33 return edac_mc_log_ce;
36 int edac_mc_get_panic_on_ue(void)
38 return edac_mc_panic_on_ue;
41 /* this is temporary */
42 int edac_mc_get_poll_msec(void)
44 return edac_mc_poll_msec;
47 /* Parameter declarations for above */
48 module_param(edac_mc_panic_on_ue, int, 0644);
49 MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
50 module_param(edac_mc_log_ue, int, 0644);
51 MODULE_PARM_DESC(edac_mc_log_ue,
52 "Log uncorrectable error to console: 0=off 1=on");
53 module_param(edac_mc_log_ce, int, 0644);
54 MODULE_PARM_DESC(edac_mc_log_ce,
55 "Log correctable error to console: 0=off 1=on");
56 module_param(edac_mc_poll_msec, int, 0644);
57 MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
60 * various constants for Memory Controllers
62 static const char *mem_types[] = {
63 [MEM_EMPTY] = "Empty",
64 [MEM_RESERVED] = "Reserved",
65 [MEM_UNKNOWN] = "Unknown",
69 [MEM_SDR] = "Unbuffered-SDR",
70 [MEM_RDR] = "Registered-SDR",
71 [MEM_DDR] = "Unbuffered-DDR",
72 [MEM_RDDR] = "Registered-DDR",
74 [MEM_DDR2] = "Unbuffered-DDR2",
75 [MEM_FB_DDR2] = "FullyBuffered-DDR2",
76 [MEM_RDDR2] = "Registered-DDR2"
79 static const char *dev_types[] = {
80 [DEV_UNKNOWN] = "Unknown",
90 static const char *edac_caps[] = {
91 [EDAC_UNKNOWN] = "Unknown",
93 [EDAC_RESERVED] = "Reserved",
94 [EDAC_PARITY] = "PARITY",
96 [EDAC_SECDED] = "SECDED",
97 [EDAC_S2ECD2ED] = "S2ECD2ED",
98 [EDAC_S4ECD4ED] = "S4ECD4ED",
99 [EDAC_S8ECD8ED] = "S8ECD8ED",
100 [EDAC_S16ECD16ED] = "S16ECD16ED"
106 * /sys/devices/system/edac/mc;
107 * data structures and methods
109 static ssize_t memctrl_int_show(void *ptr, char *buffer)
111 int *value = (int *)ptr;
112 return sprintf(buffer, "%u\n", *value);
115 static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count)
117 int *value = (int *)ptr;
119 if (isdigit(*buffer))
120 *value = simple_strtoul(buffer, NULL, 0);
126 /* EDAC sysfs CSROW data structures and methods
129 /* Set of more default csrow<id> attribute show/store functions */
130 static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data,
133 return sprintf(data, "%u\n", csrow->ue_count);
136 static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data,
139 return sprintf(data, "%u\n", csrow->ce_count);
142 static ssize_t csrow_size_show(struct csrow_info *csrow, char *data,
145 return sprintf(data, "%u\n", PAGES_TO_MiB(csrow->nr_pages));
148 static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data,
151 return sprintf(data, "%s\n", mem_types[csrow->mtype]);
154 static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data,
157 return sprintf(data, "%s\n", dev_types[csrow->dtype]);
160 static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data,
163 return sprintf(data, "%s\n", edac_caps[csrow->edac_mode]);
166 /* show/store functions for DIMM Label attributes */
167 static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
168 char *data, int channel)
170 return snprintf(data, EDAC_MC_LABEL_LEN, "%s",
171 csrow->channels[channel].label);
174 static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
176 size_t count, int channel)
178 ssize_t max_size = 0;
180 max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
181 strncpy(csrow->channels[channel].label, data, max_size);
182 csrow->channels[channel].label[max_size] = '\0';
187 /* show function for dynamic chX_ce_count attribute */
188 static ssize_t channel_ce_count_show(struct csrow_info *csrow,
189 char *data, int channel)
191 return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
194 /* csrow specific attribute structure */
195 struct csrowdev_attribute {
196 struct attribute attr;
197 ssize_t(*show) (struct csrow_info *, char *, int);
198 ssize_t(*store) (struct csrow_info *, const char *, size_t, int);
202 #define to_csrow(k) container_of(k, struct csrow_info, kobj)
203 #define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
205 /* Set of show/store higher level functions for default csrow attributes */
206 static ssize_t csrowdev_show(struct kobject *kobj,
207 struct attribute *attr, char *buffer)
209 struct csrow_info *csrow = to_csrow(kobj);
210 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
212 if (csrowdev_attr->show)
213 return csrowdev_attr->show(csrow,
214 buffer, csrowdev_attr->private);
218 static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
219 const char *buffer, size_t count)
221 struct csrow_info *csrow = to_csrow(kobj);
222 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
224 if (csrowdev_attr->store)
225 return csrowdev_attr->store(csrow,
227 count, csrowdev_attr->private);
231 static struct sysfs_ops csrowfs_ops = {
232 .show = csrowdev_show,
233 .store = csrowdev_store
236 #define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \
237 static struct csrowdev_attribute attr_##_name = { \
238 .attr = {.name = __stringify(_name), .mode = _mode }, \
241 .private = _private, \
244 /* default cwrow<id>/attribute files */
245 CSROWDEV_ATTR(size_mb, S_IRUGO, csrow_size_show, NULL, 0);
246 CSROWDEV_ATTR(dev_type, S_IRUGO, csrow_dev_type_show, NULL, 0);
247 CSROWDEV_ATTR(mem_type, S_IRUGO, csrow_mem_type_show, NULL, 0);
248 CSROWDEV_ATTR(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL, 0);
249 CSROWDEV_ATTR(ue_count, S_IRUGO, csrow_ue_count_show, NULL, 0);
250 CSROWDEV_ATTR(ce_count, S_IRUGO, csrow_ce_count_show, NULL, 0);
252 /* default attributes of the CSROW<id> object */
253 static struct csrowdev_attribute *default_csrow_attr[] = {
263 /* possible dynamic channel DIMM Label attribute files */
264 CSROWDEV_ATTR(ch0_dimm_label, S_IRUGO | S_IWUSR,
265 channel_dimm_label_show, channel_dimm_label_store, 0);
266 CSROWDEV_ATTR(ch1_dimm_label, S_IRUGO | S_IWUSR,
267 channel_dimm_label_show, channel_dimm_label_store, 1);
268 CSROWDEV_ATTR(ch2_dimm_label, S_IRUGO | S_IWUSR,
269 channel_dimm_label_show, channel_dimm_label_store, 2);
270 CSROWDEV_ATTR(ch3_dimm_label, S_IRUGO | S_IWUSR,
271 channel_dimm_label_show, channel_dimm_label_store, 3);
272 CSROWDEV_ATTR(ch4_dimm_label, S_IRUGO | S_IWUSR,
273 channel_dimm_label_show, channel_dimm_label_store, 4);
274 CSROWDEV_ATTR(ch5_dimm_label, S_IRUGO | S_IWUSR,
275 channel_dimm_label_show, channel_dimm_label_store, 5);
277 /* Total possible dynamic DIMM Label attribute file table */
278 static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
279 &attr_ch0_dimm_label,
280 &attr_ch1_dimm_label,
281 &attr_ch2_dimm_label,
282 &attr_ch3_dimm_label,
283 &attr_ch4_dimm_label,
287 /* possible dynamic channel ce_count attribute files */
288 CSROWDEV_ATTR(ch0_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 0);
289 CSROWDEV_ATTR(ch1_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 1);
290 CSROWDEV_ATTR(ch2_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 2);
291 CSROWDEV_ATTR(ch3_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 3);
292 CSROWDEV_ATTR(ch4_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 4);
293 CSROWDEV_ATTR(ch5_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 5);
295 /* Total possible dynamic ce_count attribute file table */
296 static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
305 #define EDAC_NR_CHANNELS 6
307 /* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */
308 static int edac_create_channel_files(struct kobject *kobj, int chan)
312 if (chan >= EDAC_NR_CHANNELS)
315 /* create the DIMM label attribute file */
316 err = sysfs_create_file(kobj,
318 dynamic_csrow_dimm_attr[chan]);
321 /* create the CE Count attribute file */
322 err = sysfs_create_file(kobj,
324 dynamic_csrow_ce_count_attr[chan]);
326 debugf1("%s() dimm labels and ce_count files created",
333 /* No memory to release for this kobj */
334 static void edac_csrow_instance_release(struct kobject *kobj)
336 struct mem_ctl_info *mci;
337 struct csrow_info *cs;
339 debugf1("%s()\n", __func__);
341 cs = container_of(kobj, struct csrow_info, kobj);
344 kobject_put(&mci->edac_mci_kobj);
347 /* the kobj_type instance for a CSROW */
348 static struct kobj_type ktype_csrow = {
349 .release = edac_csrow_instance_release,
350 .sysfs_ops = &csrowfs_ops,
351 .default_attrs = (struct attribute **)default_csrow_attr,
354 /* Create a CSROW object under specifed edac_mc_device */
355 static int edac_create_csrow_object(struct mem_ctl_info *mci,
356 struct csrow_info *csrow, int index)
358 struct kobject *kobj_mci = &mci->edac_mci_kobj;
359 struct kobject *kobj;
363 /* generate ..../edac/mc/mc<id>/csrow<index> */
364 memset(&csrow->kobj, 0, sizeof(csrow->kobj));
365 csrow->mci = mci; /* include container up link */
366 csrow->kobj.parent = kobj_mci;
367 csrow->kobj.ktype = &ktype_csrow;
369 /* name this instance of csrow<id> */
370 err = kobject_set_name(&csrow->kobj, "csrow%d", index);
374 /* bump the mci instance's kobject's ref count */
375 kobj = kobject_get(&mci->edac_mci_kobj);
381 /* Instanstiate the csrow object */
382 err = kobject_register(&csrow->kobj);
384 goto err_release_top_kobj;
386 /* At this point, to release a csrow kobj, one must
387 * call the kobject_unregister and allow that tear down
388 * to work the releasing
391 /* Create the dyanmic attribute files on this csrow,
392 * namely, the DIMM labels and the channel ce_count
394 for (chan = 0; chan < csrow->nr_channels; chan++) {
395 err = edac_create_channel_files(&csrow->kobj, chan);
397 /* special case the unregister here */
398 kobject_unregister(&csrow->kobj);
405 /* error unwind stack */
406 err_release_top_kobj:
407 kobject_put(&mci->edac_mci_kobj);
413 /* default sysfs methods and data structures for the main MCI kobject */
415 static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
416 const char *data, size_t count)
420 mci->ue_noinfo_count = 0;
421 mci->ce_noinfo_count = 0;
425 for (row = 0; row < mci->nr_csrows; row++) {
426 struct csrow_info *ri = &mci->csrows[row];
431 for (chan = 0; chan < ri->nr_channels; chan++)
432 ri->channels[chan].ce_count = 0;
435 mci->start_time = jiffies;
439 /* memory scrubbing */
440 static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci,
441 const char *data, size_t count)
445 if (mci->set_sdram_scrub_rate) {
447 memctrl_int_store(&bandwidth, data, count);
449 if (!(*mci->set_sdram_scrub_rate) (mci, &bandwidth)) {
450 edac_printk(KERN_DEBUG, EDAC_MC,
451 "Scrub rate set successfully, applied: %d\n",
454 /* FIXME: error codes maybe? */
455 edac_printk(KERN_DEBUG, EDAC_MC,
456 "Scrub rate set FAILED, could not apply: %d\n",
460 /* FIXME: produce "not implemented" ERROR for user-side. */
461 edac_printk(KERN_WARNING, EDAC_MC,
462 "Memory scrubbing 'set'control is not implemented!\n");
467 static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data)
471 if (mci->get_sdram_scrub_rate) {
472 if (!(*mci->get_sdram_scrub_rate) (mci, &bandwidth)) {
473 edac_printk(KERN_DEBUG, EDAC_MC,
474 "Scrub rate successfully, fetched: %d\n",
477 /* FIXME: error codes maybe? */
478 edac_printk(KERN_DEBUG, EDAC_MC,
479 "Scrub rate fetch FAILED, got: %d\n",
483 /* FIXME: produce "not implemented" ERROR for user-side. */
484 edac_printk(KERN_WARNING, EDAC_MC,
485 "Memory scrubbing 'get' control is not implemented\n");
487 return sprintf(data, "%d\n", bandwidth);
490 /* default attribute files for the MCI object */
491 static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
493 return sprintf(data, "%d\n", mci->ue_count);
496 static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
498 return sprintf(data, "%d\n", mci->ce_count);
501 static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
503 return sprintf(data, "%d\n", mci->ce_noinfo_count);
506 static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
508 return sprintf(data, "%d\n", mci->ue_noinfo_count);
511 static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data)
513 return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
516 static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
518 return sprintf(data, "%s\n", mci->ctl_name);
521 static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data)
523 int total_pages, csrow_idx;
525 for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows;
527 struct csrow_info *csrow = &mci->csrows[csrow_idx];
529 if (!csrow->nr_pages)
532 total_pages += csrow->nr_pages;
535 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
538 #define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
539 #define to_mcidev_attr(a) container_of(a,struct mcidev_sysfs_attribute,attr)
541 /* MCI show/store functions for top most object */
542 static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
545 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
546 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
548 if (mcidev_attr->show)
549 return mcidev_attr->show(mem_ctl_info, buffer);
554 static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr,
555 const char *buffer, size_t count)
557 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
558 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
560 if (mcidev_attr->store)
561 return mcidev_attr->store(mem_ctl_info, buffer, count);
566 /* Intermediate show/store table */
567 static struct sysfs_ops mci_ops = {
569 .store = mcidev_store
572 #define MCIDEV_ATTR(_name,_mode,_show,_store) \
573 static struct mcidev_sysfs_attribute mci_attr_##_name = { \
574 .attr = {.name = __stringify(_name), .mode = _mode }, \
579 /* default Control file */
580 MCIDEV_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
582 /* default Attribute files */
583 MCIDEV_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
584 MCIDEV_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
585 MCIDEV_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
586 MCIDEV_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
587 MCIDEV_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
588 MCIDEV_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
589 MCIDEV_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
591 /* memory scrubber attribute file */
592 MCIDEV_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show,
593 mci_sdram_scrub_rate_store);
595 static struct mcidev_sysfs_attribute *mci_attr[] = {
596 &mci_attr_reset_counters,
599 &mci_attr_seconds_since_reset,
600 &mci_attr_ue_noinfo_count,
601 &mci_attr_ce_noinfo_count,
604 &mci_attr_sdram_scrub_rate,
610 * Release of a MC controlling instance
612 * each MC control instance has the following resources upon entry:
613 * a) a ref count on the top memctl kobj
614 * b) a ref count on this module
616 * this function must decrement those ref counts and then
617 * issue a free on the instance's memory
619 static void edac_mci_control_release(struct kobject *kobj)
621 struct mem_ctl_info *mci;
625 debugf0("%s() mci instance idx=%d releasing\n", __func__, mci->mc_idx);
627 /* decrement the module ref count */
628 module_put(mci->owner);
630 /* free the mci instance memory here */
634 static struct kobj_type ktype_mci = {
635 .release = edac_mci_control_release,
636 .sysfs_ops = &mci_ops,
637 .default_attrs = (struct attribute **)mci_attr,
640 /* show/store, tables, etc for the MC kset */
643 struct memctrl_dev_attribute {
644 struct attribute attr;
646 ssize_t(*show) (void *, char *);
647 ssize_t(*store) (void *, const char *, size_t);
650 /* Set of show/store abstract level functions for memory control object */
651 static ssize_t memctrl_dev_show(struct kobject *kobj,
652 struct attribute *attr, char *buffer)
654 struct memctrl_dev_attribute *memctrl_dev;
655 memctrl_dev = (struct memctrl_dev_attribute *)attr;
657 if (memctrl_dev->show)
658 return memctrl_dev->show(memctrl_dev->value, buffer);
663 static ssize_t memctrl_dev_store(struct kobject *kobj, struct attribute *attr,
664 const char *buffer, size_t count)
666 struct memctrl_dev_attribute *memctrl_dev;
667 memctrl_dev = (struct memctrl_dev_attribute *)attr;
669 if (memctrl_dev->store)
670 return memctrl_dev->store(memctrl_dev->value, buffer, count);
675 static struct sysfs_ops memctrlfs_ops = {
676 .show = memctrl_dev_show,
677 .store = memctrl_dev_store
680 #define MEMCTRL_ATTR(_name, _mode, _show, _store) \
681 static struct memctrl_dev_attribute attr_##_name = { \
682 .attr = {.name = __stringify(_name), .mode = _mode }, \
688 #define MEMCTRL_STRING_ATTR(_name, _data, _mode, _show, _store) \
689 static struct memctrl_dev_attribute attr_##_name = { \
690 .attr = {.name = __stringify(_name), .mode = _mode }, \
696 /* csrow<id> control files */
697 MEMCTRL_ATTR(edac_mc_panic_on_ue,
698 S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
700 MEMCTRL_ATTR(edac_mc_log_ue,
701 S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
703 MEMCTRL_ATTR(edac_mc_log_ce,
704 S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
706 MEMCTRL_ATTR(edac_mc_poll_msec,
707 S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
709 /* Base Attributes of the memory ECC object */
710 static struct memctrl_dev_attribute *memctrl_attr[] = {
711 &attr_edac_mc_panic_on_ue,
712 &attr_edac_mc_log_ue,
713 &attr_edac_mc_log_ce,
714 &attr_edac_mc_poll_msec,
719 /* the ktype for the mc_kset internal kobj */
720 static struct kobj_type ktype_mc_set_attribs = {
721 .sysfs_ops = &memctrlfs_ops,
722 .default_attrs = (struct attribute **)memctrl_attr,
725 /* EDAC memory controller sysfs kset:
726 * /sys/devices/system/edac/mc
728 static struct kset mc_kset = {
729 .kobj = {.name = "mc", .ktype = &ktype_mc_set_attribs },
735 * edac_mc_register_sysfs_main_kobj
737 * setups and registers the main kobject for each mci
739 int edac_mc_register_sysfs_main_kobj(struct mem_ctl_info *mci)
741 struct kobject *kobj_mci;
744 debugf1("%s()\n", __func__);
746 kobj_mci = &mci->edac_mci_kobj;
748 /* Init the mci's kobject */
749 memset(kobj_mci, 0, sizeof(*kobj_mci));
751 /* this instance become part of the mc_kset */
752 kobj_mci->kset = &mc_kset;
754 /* set the name of the mc<id> object */
755 err = kobject_set_name(kobj_mci, "mc%d", mci->mc_idx);
759 /* Record which module 'owns' this control structure
760 * and bump the ref count of the module
762 mci->owner = THIS_MODULE;
764 /* bump ref count on this module */
765 if (!try_module_get(mci->owner)) {
770 /* register the mc<id> kobject to the mc_kset */
771 err = kobject_register(kobj_mci);
773 debugf1("%s()Failed to register '.../edac/mc%d'\n",
774 __func__, mci->mc_idx);
778 /* At this point, to 'free' the control struct,
779 * edac_mc_unregister_sysfs_main_kobj() must be used
782 debugf1("%s() Registered '.../edac/mc%d' kobject\n",
783 __func__, mci->mc_idx);
787 /* Error exit stack */
790 module_put(mci->owner);
797 * edac_mc_register_sysfs_main_kobj
799 * tears down and the main mci kobject from the mc_kset
801 void edac_mc_unregister_sysfs_main_kobj(struct mem_ctl_info *mci)
803 /* delete the kobj from the mc_kset */
804 kobject_unregister(&mci->edac_mci_kobj);
807 #define EDAC_DEVICE_SYMLINK "device"
810 * edac_create_mci_instance_attributes
811 * create MC driver specific attributes at the topmost level
812 * directory of this mci instance.
814 static int edac_create_mci_instance_attributes(struct mem_ctl_info *mci)
817 struct mcidev_sysfs_attribute *sysfs_attrib;
819 /* point to the start of the array and iterate over it
820 * adding each attribute listed to this mci instance's kobject
822 sysfs_attrib = mci->mc_driver_sysfs_attributes;
824 while (sysfs_attrib && sysfs_attrib->attr.name) {
825 err = sysfs_create_file(&mci->edac_mci_kobj,
826 (struct attribute*) sysfs_attrib);
838 * edac_remove_mci_instance_attributes
839 * remove MC driver specific attributes at the topmost level
840 * directory of this mci instance.
842 static void edac_remove_mci_instance_attributes(struct mem_ctl_info *mci)
844 struct mcidev_sysfs_attribute *sysfs_attrib;
846 /* point to the start of the array and iterate over it
847 * adding each attribute listed to this mci instance's kobject
849 sysfs_attrib = mci->mc_driver_sysfs_attributes;
851 /* loop if there are attributes and until we hit a NULL entry */
852 while (sysfs_attrib && sysfs_attrib->attr.name) {
853 sysfs_remove_file(&mci->edac_mci_kobj,
854 (struct attribute *) sysfs_attrib);
861 * Create a new Memory Controller kobject instance,
862 * mc<id> under the 'mc' directory
868 int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
872 struct csrow_info *csrow;
873 struct kobject *kobj_mci = &mci->edac_mci_kobj;
875 debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
877 /* create a symlink for the device */
878 err = sysfs_create_link(kobj_mci, &mci->dev->kobj,
879 EDAC_DEVICE_SYMLINK);
881 debugf1("%s() failure to create symlink\n", __func__);
885 /* If the low level driver desires some attributes,
886 * then create them now for the driver.
888 if (mci->mc_driver_sysfs_attributes) {
889 err = edac_create_mci_instance_attributes(mci);
891 debugf1("%s() failure to create mci attributes\n",
897 /* Make directories for each CSROW object under the mc<id> kobject
899 for (i = 0; i < mci->nr_csrows; i++) {
900 csrow = &mci->csrows[i];
902 /* Only expose populated CSROWs */
903 if (csrow->nr_pages > 0) {
904 err = edac_create_csrow_object(mci, csrow, i);
906 debugf1("%s() failure: create csrow %d obj\n",
915 /* CSROW error: backout what has already been registered, */
917 for (i--; i >= 0; i--) {
918 if (csrow->nr_pages > 0) {
919 kobject_unregister(&mci->csrows[i].kobj);
923 /* remove the mci instance's attributes, if any */
924 edac_remove_mci_instance_attributes(mci);
926 /* remove the symlink */
927 sysfs_remove_link(kobj_mci, EDAC_DEVICE_SYMLINK);
934 * remove a Memory Controller instance
936 void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
940 debugf0("%s()\n", __func__);
942 /* remove all csrow kobjects */
943 for (i = 0; i < mci->nr_csrows; i++) {
944 if (mci->csrows[i].nr_pages > 0) {
945 debugf0("%s() unreg csrow-%d\n", __func__, i);
946 kobject_unregister(&mci->csrows[i].kobj);
950 debugf0("%s() remove_link\n", __func__);
952 /* remove the symlink */
953 sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
955 debugf0("%s() remove_mci_instance\n", __func__);
957 /* remove this mci instance's attribtes */
958 edac_remove_mci_instance_attributes(mci);
960 debugf0("%s() unregister this mci kobj\n", __func__);
962 /* unregister this instance's kobject */
963 kobject_unregister(&mci->edac_mci_kobj);
970 * edac_setup_sysfs_mc_kset(void)
972 * Initialize the mc_kset for the 'mc' entry
973 * This requires creating the top 'mc' directory with a kset
974 * and its controls/attributes.
976 * To this 'mc' kset, instance 'mci' will be grouped as children.
979 * !0 FAILURE error code
981 int edac_sysfs_setup_mc_kset(void)
984 struct sysdev_class *edac_class;
986 debugf1("%s()\n", __func__);
988 /* get the /sys/devices/system/edac class reference */
989 edac_class = edac_get_edac_class();
990 if (edac_class == NULL) {
991 debugf1("%s() no edac_class error=%d\n", __func__, err);
995 /* Init the MC's kobject */
996 mc_kset.kobj.parent = &edac_class->kset.kobj;
998 /* register the mc_kset */
999 err = kset_register(&mc_kset);
1001 debugf1("%s() Failed to register '.../edac/mc'\n", __func__);
1005 debugf1("%s() Registered '.../edac/mc' kobject\n", __func__);
1010 /* error unwind stack */
1016 * edac_sysfs_teardown_mc_kset
1018 * deconstruct the mc_ket for memory controllers
1020 void edac_sysfs_teardown_mc_kset(void)
1022 kset_unregister(&mc_kset);