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 * mc poll_msec time value
128 static ssize_t poll_msec_int_store(void *ptr, const char *buffer, size_t count)
130 int *value = (int *)ptr;
132 if (isdigit(*buffer)) {
133 *value = simple_strtoul(buffer, NULL, 0);
135 /* notify edac_mc engine to reset the poll period */
136 edac_mc_reset_delay_period(*value);
143 /* EDAC sysfs CSROW data structures and methods
146 /* Set of more default csrow<id> attribute show/store functions */
147 static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data,
150 return sprintf(data, "%u\n", csrow->ue_count);
153 static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data,
156 return sprintf(data, "%u\n", csrow->ce_count);
159 static ssize_t csrow_size_show(struct csrow_info *csrow, char *data,
162 return sprintf(data, "%u\n", PAGES_TO_MiB(csrow->nr_pages));
165 static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data,
168 return sprintf(data, "%s\n", mem_types[csrow->mtype]);
171 static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data,
174 return sprintf(data, "%s\n", dev_types[csrow->dtype]);
177 static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data,
180 return sprintf(data, "%s\n", edac_caps[csrow->edac_mode]);
183 /* show/store functions for DIMM Label attributes */
184 static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
185 char *data, int channel)
187 return snprintf(data, EDAC_MC_LABEL_LEN, "%s",
188 csrow->channels[channel].label);
191 static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
193 size_t count, int channel)
195 ssize_t max_size = 0;
197 max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
198 strncpy(csrow->channels[channel].label, data, max_size);
199 csrow->channels[channel].label[max_size] = '\0';
204 /* show function for dynamic chX_ce_count attribute */
205 static ssize_t channel_ce_count_show(struct csrow_info *csrow,
206 char *data, int channel)
208 return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
211 /* csrow specific attribute structure */
212 struct csrowdev_attribute {
213 struct attribute attr;
214 ssize_t(*show) (struct csrow_info *, char *, int);
215 ssize_t(*store) (struct csrow_info *, const char *, size_t, int);
219 #define to_csrow(k) container_of(k, struct csrow_info, kobj)
220 #define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
222 /* Set of show/store higher level functions for default csrow attributes */
223 static ssize_t csrowdev_show(struct kobject *kobj,
224 struct attribute *attr, char *buffer)
226 struct csrow_info *csrow = to_csrow(kobj);
227 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
229 if (csrowdev_attr->show)
230 return csrowdev_attr->show(csrow,
231 buffer, csrowdev_attr->private);
235 static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
236 const char *buffer, size_t count)
238 struct csrow_info *csrow = to_csrow(kobj);
239 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
241 if (csrowdev_attr->store)
242 return csrowdev_attr->store(csrow,
244 count, csrowdev_attr->private);
248 static struct sysfs_ops csrowfs_ops = {
249 .show = csrowdev_show,
250 .store = csrowdev_store
253 #define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \
254 static struct csrowdev_attribute attr_##_name = { \
255 .attr = {.name = __stringify(_name), .mode = _mode }, \
258 .private = _private, \
261 /* default cwrow<id>/attribute files */
262 CSROWDEV_ATTR(size_mb, S_IRUGO, csrow_size_show, NULL, 0);
263 CSROWDEV_ATTR(dev_type, S_IRUGO, csrow_dev_type_show, NULL, 0);
264 CSROWDEV_ATTR(mem_type, S_IRUGO, csrow_mem_type_show, NULL, 0);
265 CSROWDEV_ATTR(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL, 0);
266 CSROWDEV_ATTR(ue_count, S_IRUGO, csrow_ue_count_show, NULL, 0);
267 CSROWDEV_ATTR(ce_count, S_IRUGO, csrow_ce_count_show, NULL, 0);
269 /* default attributes of the CSROW<id> object */
270 static struct csrowdev_attribute *default_csrow_attr[] = {
280 /* possible dynamic channel DIMM Label attribute files */
281 CSROWDEV_ATTR(ch0_dimm_label, S_IRUGO | S_IWUSR,
282 channel_dimm_label_show, channel_dimm_label_store, 0);
283 CSROWDEV_ATTR(ch1_dimm_label, S_IRUGO | S_IWUSR,
284 channel_dimm_label_show, channel_dimm_label_store, 1);
285 CSROWDEV_ATTR(ch2_dimm_label, S_IRUGO | S_IWUSR,
286 channel_dimm_label_show, channel_dimm_label_store, 2);
287 CSROWDEV_ATTR(ch3_dimm_label, S_IRUGO | S_IWUSR,
288 channel_dimm_label_show, channel_dimm_label_store, 3);
289 CSROWDEV_ATTR(ch4_dimm_label, S_IRUGO | S_IWUSR,
290 channel_dimm_label_show, channel_dimm_label_store, 4);
291 CSROWDEV_ATTR(ch5_dimm_label, S_IRUGO | S_IWUSR,
292 channel_dimm_label_show, channel_dimm_label_store, 5);
294 /* Total possible dynamic DIMM Label attribute file table */
295 static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
296 &attr_ch0_dimm_label,
297 &attr_ch1_dimm_label,
298 &attr_ch2_dimm_label,
299 &attr_ch3_dimm_label,
300 &attr_ch4_dimm_label,
304 /* possible dynamic channel ce_count attribute files */
305 CSROWDEV_ATTR(ch0_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 0);
306 CSROWDEV_ATTR(ch1_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 1);
307 CSROWDEV_ATTR(ch2_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 2);
308 CSROWDEV_ATTR(ch3_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 3);
309 CSROWDEV_ATTR(ch4_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 4);
310 CSROWDEV_ATTR(ch5_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 5);
312 /* Total possible dynamic ce_count attribute file table */
313 static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
322 #define EDAC_NR_CHANNELS 6
324 /* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */
325 static int edac_create_channel_files(struct kobject *kobj, int chan)
329 if (chan >= EDAC_NR_CHANNELS)
332 /* create the DIMM label attribute file */
333 err = sysfs_create_file(kobj,
335 dynamic_csrow_dimm_attr[chan]);
338 /* create the CE Count attribute file */
339 err = sysfs_create_file(kobj,
341 dynamic_csrow_ce_count_attr[chan]);
343 debugf1("%s() dimm labels and ce_count files created",
350 /* No memory to release for this kobj */
351 static void edac_csrow_instance_release(struct kobject *kobj)
353 struct mem_ctl_info *mci;
354 struct csrow_info *cs;
356 debugf1("%s()\n", __func__);
358 cs = container_of(kobj, struct csrow_info, kobj);
361 kobject_put(&mci->edac_mci_kobj);
364 /* the kobj_type instance for a CSROW */
365 static struct kobj_type ktype_csrow = {
366 .release = edac_csrow_instance_release,
367 .sysfs_ops = &csrowfs_ops,
368 .default_attrs = (struct attribute **)default_csrow_attr,
371 /* Create a CSROW object under specifed edac_mc_device */
372 static int edac_create_csrow_object(struct mem_ctl_info *mci,
373 struct csrow_info *csrow, int index)
375 struct kobject *kobj_mci = &mci->edac_mci_kobj;
376 struct kobject *kobj;
380 /* generate ..../edac/mc/mc<id>/csrow<index> */
381 memset(&csrow->kobj, 0, sizeof(csrow->kobj));
382 csrow->mci = mci; /* include container up link */
384 /* bump the mci instance's kobject's ref count */
385 kobj = kobject_get(&mci->edac_mci_kobj);
391 /* Instanstiate the csrow object */
392 err = kobject_init_and_add(&csrow->kobj, &ktype_csrow, kobj_mci,
395 goto err_release_top_kobj;
397 /* At this point, to release a csrow kobj, one must
398 * call the kobject_put and allow that tear down
399 * to work the releasing
402 /* Create the dyanmic attribute files on this csrow,
403 * namely, the DIMM labels and the channel ce_count
405 for (chan = 0; chan < csrow->nr_channels; chan++) {
406 err = edac_create_channel_files(&csrow->kobj, chan);
408 /* special case the unregister here */
409 kobject_put(&csrow->kobj);
413 kobject_uevent(&csrow->kobj, KOBJ_ADD);
416 /* error unwind stack */
417 err_release_top_kobj:
418 kobject_put(&mci->edac_mci_kobj);
424 /* default sysfs methods and data structures for the main MCI kobject */
426 static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
427 const char *data, size_t count)
431 mci->ue_noinfo_count = 0;
432 mci->ce_noinfo_count = 0;
436 for (row = 0; row < mci->nr_csrows; row++) {
437 struct csrow_info *ri = &mci->csrows[row];
442 for (chan = 0; chan < ri->nr_channels; chan++)
443 ri->channels[chan].ce_count = 0;
446 mci->start_time = jiffies;
450 /* memory scrubbing */
451 static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci,
452 const char *data, size_t count)
456 if (mci->set_sdram_scrub_rate) {
458 memctrl_int_store(&bandwidth, data, count);
460 if (!(*mci->set_sdram_scrub_rate) (mci, &bandwidth)) {
461 edac_printk(KERN_DEBUG, EDAC_MC,
462 "Scrub rate set successfully, applied: %d\n",
465 /* FIXME: error codes maybe? */
466 edac_printk(KERN_DEBUG, EDAC_MC,
467 "Scrub rate set FAILED, could not apply: %d\n",
471 /* FIXME: produce "not implemented" ERROR for user-side. */
472 edac_printk(KERN_WARNING, EDAC_MC,
473 "Memory scrubbing 'set'control is not implemented!\n");
478 static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data)
482 if (mci->get_sdram_scrub_rate) {
483 if (!(*mci->get_sdram_scrub_rate) (mci, &bandwidth)) {
484 edac_printk(KERN_DEBUG, EDAC_MC,
485 "Scrub rate successfully, fetched: %d\n",
488 /* FIXME: error codes maybe? */
489 edac_printk(KERN_DEBUG, EDAC_MC,
490 "Scrub rate fetch FAILED, got: %d\n",
494 /* FIXME: produce "not implemented" ERROR for user-side. */
495 edac_printk(KERN_WARNING, EDAC_MC,
496 "Memory scrubbing 'get' control is not implemented\n");
498 return sprintf(data, "%d\n", bandwidth);
501 /* default attribute files for the MCI object */
502 static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
504 return sprintf(data, "%d\n", mci->ue_count);
507 static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
509 return sprintf(data, "%d\n", mci->ce_count);
512 static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
514 return sprintf(data, "%d\n", mci->ce_noinfo_count);
517 static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
519 return sprintf(data, "%d\n", mci->ue_noinfo_count);
522 static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data)
524 return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
527 static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
529 return sprintf(data, "%s\n", mci->ctl_name);
532 static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data)
534 int total_pages, csrow_idx;
536 for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows;
538 struct csrow_info *csrow = &mci->csrows[csrow_idx];
540 if (!csrow->nr_pages)
543 total_pages += csrow->nr_pages;
546 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
549 #define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
550 #define to_mcidev_attr(a) container_of(a,struct mcidev_sysfs_attribute,attr)
552 /* MCI show/store functions for top most object */
553 static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
556 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
557 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
559 if (mcidev_attr->show)
560 return mcidev_attr->show(mem_ctl_info, buffer);
565 static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr,
566 const char *buffer, size_t count)
568 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
569 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
571 if (mcidev_attr->store)
572 return mcidev_attr->store(mem_ctl_info, buffer, count);
577 /* Intermediate show/store table */
578 static struct sysfs_ops mci_ops = {
580 .store = mcidev_store
583 #define MCIDEV_ATTR(_name,_mode,_show,_store) \
584 static struct mcidev_sysfs_attribute mci_attr_##_name = { \
585 .attr = {.name = __stringify(_name), .mode = _mode }, \
590 /* default Control file */
591 MCIDEV_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
593 /* default Attribute files */
594 MCIDEV_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
595 MCIDEV_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
596 MCIDEV_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
597 MCIDEV_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
598 MCIDEV_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
599 MCIDEV_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
600 MCIDEV_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
602 /* memory scrubber attribute file */
603 MCIDEV_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show,
604 mci_sdram_scrub_rate_store);
606 static struct mcidev_sysfs_attribute *mci_attr[] = {
607 &mci_attr_reset_counters,
610 &mci_attr_seconds_since_reset,
611 &mci_attr_ue_noinfo_count,
612 &mci_attr_ce_noinfo_count,
615 &mci_attr_sdram_scrub_rate,
621 * Release of a MC controlling instance
623 * each MC control instance has the following resources upon entry:
624 * a) a ref count on the top memctl kobj
625 * b) a ref count on this module
627 * this function must decrement those ref counts and then
628 * issue a free on the instance's memory
630 static void edac_mci_control_release(struct kobject *kobj)
632 struct mem_ctl_info *mci;
636 debugf0("%s() mci instance idx=%d releasing\n", __func__, mci->mc_idx);
638 /* decrement the module ref count */
639 module_put(mci->owner);
641 /* free the mci instance memory here */
645 static struct kobj_type ktype_mci = {
646 .release = edac_mci_control_release,
647 .sysfs_ops = &mci_ops,
648 .default_attrs = (struct attribute **)mci_attr,
651 /* show/store, tables, etc for the MC kset */
654 struct memctrl_dev_attribute {
655 struct attribute attr;
657 ssize_t(*show) (void *, char *);
658 ssize_t(*store) (void *, const char *, size_t);
661 /* Set of show/store abstract level functions for memory control object */
662 static ssize_t memctrl_dev_show(struct kobject *kobj,
663 struct attribute *attr, char *buffer)
665 struct memctrl_dev_attribute *memctrl_dev;
666 memctrl_dev = (struct memctrl_dev_attribute *)attr;
668 if (memctrl_dev->show)
669 return memctrl_dev->show(memctrl_dev->value, buffer);
674 static ssize_t memctrl_dev_store(struct kobject *kobj, struct attribute *attr,
675 const char *buffer, size_t count)
677 struct memctrl_dev_attribute *memctrl_dev;
678 memctrl_dev = (struct memctrl_dev_attribute *)attr;
680 if (memctrl_dev->store)
681 return memctrl_dev->store(memctrl_dev->value, buffer, count);
686 static struct sysfs_ops memctrlfs_ops = {
687 .show = memctrl_dev_show,
688 .store = memctrl_dev_store
691 #define MEMCTRL_ATTR(_name, _mode, _show, _store) \
692 static struct memctrl_dev_attribute attr_##_name = { \
693 .attr = {.name = __stringify(_name), .mode = _mode }, \
699 #define MEMCTRL_STRING_ATTR(_name, _data, _mode, _show, _store) \
700 static struct memctrl_dev_attribute attr_##_name = { \
701 .attr = {.name = __stringify(_name), .mode = _mode }, \
707 /* csrow<id> control files */
708 MEMCTRL_ATTR(edac_mc_panic_on_ue,
709 S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
711 MEMCTRL_ATTR(edac_mc_log_ue,
712 S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
714 MEMCTRL_ATTR(edac_mc_log_ce,
715 S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
717 MEMCTRL_ATTR(edac_mc_poll_msec,
718 S_IRUGO | S_IWUSR, memctrl_int_show, poll_msec_int_store);
720 /* Base Attributes of the memory ECC object */
721 static struct memctrl_dev_attribute *memctrl_attr[] = {
722 &attr_edac_mc_panic_on_ue,
723 &attr_edac_mc_log_ue,
724 &attr_edac_mc_log_ce,
725 &attr_edac_mc_poll_msec,
730 /* the ktype for the mc_kset internal kobj */
731 static struct kobj_type ktype_mc_set_attribs = {
732 .sysfs_ops = &memctrlfs_ops,
733 .default_attrs = (struct attribute **)memctrl_attr,
736 /* EDAC memory controller sysfs kset:
737 * /sys/devices/system/edac/mc
739 static struct kset mc_kset = {
740 .kobj = {.ktype = &ktype_mc_set_attribs },
745 * edac_mc_register_sysfs_main_kobj
747 * setups and registers the main kobject for each mci
749 int edac_mc_register_sysfs_main_kobj(struct mem_ctl_info *mci)
751 struct kobject *kobj_mci;
754 debugf1("%s()\n", __func__);
756 kobj_mci = &mci->edac_mci_kobj;
758 /* Init the mci's kobject */
759 memset(kobj_mci, 0, sizeof(*kobj_mci));
761 /* Record which module 'owns' this control structure
762 * and bump the ref count of the module
764 mci->owner = THIS_MODULE;
766 /* bump ref count on this module */
767 if (!try_module_get(mci->owner)) {
772 /* this instance become part of the mc_kset */
773 kobj_mci->kset = &mc_kset;
775 /* register the mc<id> kobject to the mc_kset */
776 err = kobject_init_and_add(kobj_mci, &ktype_mci, NULL,
777 "mc%d", mci->mc_idx);
779 debugf1("%s()Failed to register '.../edac/mc%d'\n",
780 __func__, mci->mc_idx);
783 kobject_uevent(kobj_mci, KOBJ_ADD);
785 /* At this point, to 'free' the control struct,
786 * edac_mc_unregister_sysfs_main_kobj() must be used
789 debugf1("%s() Registered '.../edac/mc%d' kobject\n",
790 __func__, mci->mc_idx);
794 /* Error exit stack */
797 module_put(mci->owner);
804 * edac_mc_register_sysfs_main_kobj
806 * tears down and the main mci kobject from the mc_kset
808 void edac_mc_unregister_sysfs_main_kobj(struct mem_ctl_info *mci)
810 /* delete the kobj from the mc_kset */
811 kobject_put(&mci->edac_mci_kobj);
814 #define EDAC_DEVICE_SYMLINK "device"
817 * edac_create_mci_instance_attributes
818 * create MC driver specific attributes at the topmost level
819 * directory of this mci instance.
821 static int edac_create_mci_instance_attributes(struct mem_ctl_info *mci)
824 struct mcidev_sysfs_attribute *sysfs_attrib;
826 /* point to the start of the array and iterate over it
827 * adding each attribute listed to this mci instance's kobject
829 sysfs_attrib = mci->mc_driver_sysfs_attributes;
831 while (sysfs_attrib && sysfs_attrib->attr.name) {
832 err = sysfs_create_file(&mci->edac_mci_kobj,
833 (struct attribute*) sysfs_attrib);
845 * edac_remove_mci_instance_attributes
846 * remove MC driver specific attributes at the topmost level
847 * directory of this mci instance.
849 static void edac_remove_mci_instance_attributes(struct mem_ctl_info *mci)
851 struct mcidev_sysfs_attribute *sysfs_attrib;
853 /* point to the start of the array and iterate over it
854 * adding each attribute listed to this mci instance's kobject
856 sysfs_attrib = mci->mc_driver_sysfs_attributes;
858 /* loop if there are attributes and until we hit a NULL entry */
859 while (sysfs_attrib && sysfs_attrib->attr.name) {
860 sysfs_remove_file(&mci->edac_mci_kobj,
861 (struct attribute *) sysfs_attrib);
868 * Create a new Memory Controller kobject instance,
869 * mc<id> under the 'mc' directory
875 int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
879 struct csrow_info *csrow;
880 struct kobject *kobj_mci = &mci->edac_mci_kobj;
882 debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
884 /* create a symlink for the device */
885 err = sysfs_create_link(kobj_mci, &mci->dev->kobj,
886 EDAC_DEVICE_SYMLINK);
888 debugf1("%s() failure to create symlink\n", __func__);
892 /* If the low level driver desires some attributes,
893 * then create them now for the driver.
895 if (mci->mc_driver_sysfs_attributes) {
896 err = edac_create_mci_instance_attributes(mci);
898 debugf1("%s() failure to create mci attributes\n",
904 /* Make directories for each CSROW object under the mc<id> kobject
906 for (i = 0; i < mci->nr_csrows; i++) {
907 csrow = &mci->csrows[i];
909 /* Only expose populated CSROWs */
910 if (csrow->nr_pages > 0) {
911 err = edac_create_csrow_object(mci, csrow, i);
913 debugf1("%s() failure: create csrow %d obj\n",
922 /* CSROW error: backout what has already been registered, */
924 for (i--; i >= 0; i--) {
925 if (csrow->nr_pages > 0) {
926 kobject_put(&mci->csrows[i].kobj);
930 /* remove the mci instance's attributes, if any */
931 edac_remove_mci_instance_attributes(mci);
933 /* remove the symlink */
934 sysfs_remove_link(kobj_mci, EDAC_DEVICE_SYMLINK);
941 * remove a Memory Controller instance
943 void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
947 debugf0("%s()\n", __func__);
949 /* remove all csrow kobjects */
950 for (i = 0; i < mci->nr_csrows; i++) {
951 if (mci->csrows[i].nr_pages > 0) {
952 debugf0("%s() unreg csrow-%d\n", __func__, i);
953 kobject_put(&mci->csrows[i].kobj);
957 debugf0("%s() remove_link\n", __func__);
959 /* remove the symlink */
960 sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
962 debugf0("%s() remove_mci_instance\n", __func__);
964 /* remove this mci instance's attribtes */
965 edac_remove_mci_instance_attributes(mci);
967 debugf0("%s() unregister this mci kobj\n", __func__);
969 /* unregister this instance's kobject */
970 kobject_put(&mci->edac_mci_kobj);
977 * edac_setup_sysfs_mc_kset(void)
979 * Initialize the mc_kset for the 'mc' entry
980 * This requires creating the top 'mc' directory with a kset
981 * and its controls/attributes.
983 * To this 'mc' kset, instance 'mci' will be grouped as children.
986 * !0 FAILURE error code
988 int edac_sysfs_setup_mc_kset(void)
991 struct sysdev_class *edac_class;
993 debugf1("%s()\n", __func__);
995 /* get the /sys/devices/system/edac class reference */
996 edac_class = edac_get_edac_class();
997 if (edac_class == NULL) {
998 debugf1("%s() no edac_class error=%d\n", __func__, err);
1002 /* Init the MC's kobject */
1003 kobject_set_name(&mc_kset.kobj, "mc");
1004 mc_kset.kobj.parent = &edac_class->kset.kobj;
1006 /* register the mc_kset */
1007 err = kset_register(&mc_kset);
1009 debugf1("%s() Failed to register '.../edac/mc'\n", __func__);
1013 debugf1("%s() Registered '.../edac/mc' kobject\n", __func__);
1018 /* error unwind stack */
1024 * edac_sysfs_teardown_mc_kset
1026 * deconstruct the mc_ket for memory controllers
1028 void edac_sysfs_teardown_mc_kset(void)
1030 kset_unregister(&mc_kset);