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 static int edac_set_poll_msec(const char *val, struct kernel_param *kp)
55 ret = strict_strtol(val, 0, &l);
56 if (ret == -EINVAL || ((int)l != l))
58 *((int *)kp->arg) = l;
60 /* notify edac_mc engine to reset the poll period */
61 edac_mc_reset_delay_period(l);
66 /* Parameter declarations for above */
67 module_param(edac_mc_panic_on_ue, int, 0644);
68 MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
69 module_param(edac_mc_log_ue, int, 0644);
70 MODULE_PARM_DESC(edac_mc_log_ue,
71 "Log uncorrectable error to console: 0=off 1=on");
72 module_param(edac_mc_log_ce, int, 0644);
73 MODULE_PARM_DESC(edac_mc_log_ce,
74 "Log correctable error to console: 0=off 1=on");
75 module_param_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_int,
76 &edac_mc_poll_msec, 0644);
77 MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
80 * various constants for Memory Controllers
82 static const char *mem_types[] = {
83 [MEM_EMPTY] = "Empty",
84 [MEM_RESERVED] = "Reserved",
85 [MEM_UNKNOWN] = "Unknown",
89 [MEM_SDR] = "Unbuffered-SDR",
90 [MEM_RDR] = "Registered-SDR",
91 [MEM_DDR] = "Unbuffered-DDR",
92 [MEM_RDDR] = "Registered-DDR",
94 [MEM_DDR2] = "Unbuffered-DDR2",
95 [MEM_FB_DDR2] = "FullyBuffered-DDR2",
96 [MEM_RDDR2] = "Registered-DDR2",
100 static const char *dev_types[] = {
101 [DEV_UNKNOWN] = "Unknown",
111 static const char *edac_caps[] = {
112 [EDAC_UNKNOWN] = "Unknown",
113 [EDAC_NONE] = "None",
114 [EDAC_RESERVED] = "Reserved",
115 [EDAC_PARITY] = "PARITY",
117 [EDAC_SECDED] = "SECDED",
118 [EDAC_S2ECD2ED] = "S2ECD2ED",
119 [EDAC_S4ECD4ED] = "S4ECD4ED",
120 [EDAC_S8ECD8ED] = "S8ECD8ED",
121 [EDAC_S16ECD16ED] = "S16ECD16ED"
126 static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count)
128 int *value = (int *)ptr;
130 if (isdigit(*buffer))
131 *value = simple_strtoul(buffer, NULL, 0);
137 /* EDAC sysfs CSROW data structures and methods
140 /* Set of more default csrow<id> attribute show/store functions */
141 static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data,
144 return sprintf(data, "%u\n", csrow->ue_count);
147 static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data,
150 return sprintf(data, "%u\n", csrow->ce_count);
153 static ssize_t csrow_size_show(struct csrow_info *csrow, char *data,
156 return sprintf(data, "%u\n", PAGES_TO_MiB(csrow->nr_pages));
159 static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data,
162 return sprintf(data, "%s\n", mem_types[csrow->mtype]);
165 static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data,
168 return sprintf(data, "%s\n", dev_types[csrow->dtype]);
171 static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data,
174 return sprintf(data, "%s\n", edac_caps[csrow->edac_mode]);
177 /* show/store functions for DIMM Label attributes */
178 static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
179 char *data, int channel)
181 return snprintf(data, EDAC_MC_LABEL_LEN, "%s",
182 csrow->channels[channel].label);
185 static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
187 size_t count, int channel)
189 ssize_t max_size = 0;
191 max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
192 strncpy(csrow->channels[channel].label, data, max_size);
193 csrow->channels[channel].label[max_size] = '\0';
198 /* show function for dynamic chX_ce_count attribute */
199 static ssize_t channel_ce_count_show(struct csrow_info *csrow,
200 char *data, int channel)
202 return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
205 /* csrow specific attribute structure */
206 struct csrowdev_attribute {
207 struct attribute attr;
208 ssize_t(*show) (struct csrow_info *, char *, int);
209 ssize_t(*store) (struct csrow_info *, const char *, size_t, int);
213 #define to_csrow(k) container_of(k, struct csrow_info, kobj)
214 #define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
216 /* Set of show/store higher level functions for default csrow attributes */
217 static ssize_t csrowdev_show(struct kobject *kobj,
218 struct attribute *attr, char *buffer)
220 struct csrow_info *csrow = to_csrow(kobj);
221 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
223 if (csrowdev_attr->show)
224 return csrowdev_attr->show(csrow,
225 buffer, csrowdev_attr->private);
229 static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
230 const char *buffer, size_t count)
232 struct csrow_info *csrow = to_csrow(kobj);
233 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
235 if (csrowdev_attr->store)
236 return csrowdev_attr->store(csrow,
238 count, csrowdev_attr->private);
242 static struct sysfs_ops csrowfs_ops = {
243 .show = csrowdev_show,
244 .store = csrowdev_store
247 #define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \
248 static struct csrowdev_attribute attr_##_name = { \
249 .attr = {.name = __stringify(_name), .mode = _mode }, \
252 .private = _private, \
255 /* default cwrow<id>/attribute files */
256 CSROWDEV_ATTR(size_mb, S_IRUGO, csrow_size_show, NULL, 0);
257 CSROWDEV_ATTR(dev_type, S_IRUGO, csrow_dev_type_show, NULL, 0);
258 CSROWDEV_ATTR(mem_type, S_IRUGO, csrow_mem_type_show, NULL, 0);
259 CSROWDEV_ATTR(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL, 0);
260 CSROWDEV_ATTR(ue_count, S_IRUGO, csrow_ue_count_show, NULL, 0);
261 CSROWDEV_ATTR(ce_count, S_IRUGO, csrow_ce_count_show, NULL, 0);
263 /* default attributes of the CSROW<id> object */
264 static struct csrowdev_attribute *default_csrow_attr[] = {
274 /* possible dynamic channel DIMM Label attribute files */
275 CSROWDEV_ATTR(ch0_dimm_label, S_IRUGO | S_IWUSR,
276 channel_dimm_label_show, channel_dimm_label_store, 0);
277 CSROWDEV_ATTR(ch1_dimm_label, S_IRUGO | S_IWUSR,
278 channel_dimm_label_show, channel_dimm_label_store, 1);
279 CSROWDEV_ATTR(ch2_dimm_label, S_IRUGO | S_IWUSR,
280 channel_dimm_label_show, channel_dimm_label_store, 2);
281 CSROWDEV_ATTR(ch3_dimm_label, S_IRUGO | S_IWUSR,
282 channel_dimm_label_show, channel_dimm_label_store, 3);
283 CSROWDEV_ATTR(ch4_dimm_label, S_IRUGO | S_IWUSR,
284 channel_dimm_label_show, channel_dimm_label_store, 4);
285 CSROWDEV_ATTR(ch5_dimm_label, S_IRUGO | S_IWUSR,
286 channel_dimm_label_show, channel_dimm_label_store, 5);
288 /* Total possible dynamic DIMM Label attribute file table */
289 static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
290 &attr_ch0_dimm_label,
291 &attr_ch1_dimm_label,
292 &attr_ch2_dimm_label,
293 &attr_ch3_dimm_label,
294 &attr_ch4_dimm_label,
298 /* possible dynamic channel ce_count attribute files */
299 CSROWDEV_ATTR(ch0_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 0);
300 CSROWDEV_ATTR(ch1_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 1);
301 CSROWDEV_ATTR(ch2_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 2);
302 CSROWDEV_ATTR(ch3_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 3);
303 CSROWDEV_ATTR(ch4_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 4);
304 CSROWDEV_ATTR(ch5_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 5);
306 /* Total possible dynamic ce_count attribute file table */
307 static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
316 #define EDAC_NR_CHANNELS 6
318 /* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */
319 static int edac_create_channel_files(struct kobject *kobj, int chan)
323 if (chan >= EDAC_NR_CHANNELS)
326 /* create the DIMM label attribute file */
327 err = sysfs_create_file(kobj,
329 dynamic_csrow_dimm_attr[chan]);
332 /* create the CE Count attribute file */
333 err = sysfs_create_file(kobj,
335 dynamic_csrow_ce_count_attr[chan]);
337 debugf1("%s() dimm labels and ce_count files created",
344 /* No memory to release for this kobj */
345 static void edac_csrow_instance_release(struct kobject *kobj)
347 struct mem_ctl_info *mci;
348 struct csrow_info *cs;
350 debugf1("%s()\n", __func__);
352 cs = container_of(kobj, struct csrow_info, kobj);
355 kobject_put(&mci->edac_mci_kobj);
358 /* the kobj_type instance for a CSROW */
359 static struct kobj_type ktype_csrow = {
360 .release = edac_csrow_instance_release,
361 .sysfs_ops = &csrowfs_ops,
362 .default_attrs = (struct attribute **)default_csrow_attr,
365 /* Create a CSROW object under specifed edac_mc_device */
366 static int edac_create_csrow_object(struct mem_ctl_info *mci,
367 struct csrow_info *csrow, int index)
369 struct kobject *kobj_mci = &mci->edac_mci_kobj;
370 struct kobject *kobj;
374 /* generate ..../edac/mc/mc<id>/csrow<index> */
375 memset(&csrow->kobj, 0, sizeof(csrow->kobj));
376 csrow->mci = mci; /* include container up link */
378 /* bump the mci instance's kobject's ref count */
379 kobj = kobject_get(&mci->edac_mci_kobj);
385 /* Instanstiate the csrow object */
386 err = kobject_init_and_add(&csrow->kobj, &ktype_csrow, kobj_mci,
389 goto err_release_top_kobj;
391 /* At this point, to release a csrow kobj, one must
392 * call the kobject_put and allow that tear down
393 * to work the releasing
396 /* Create the dyanmic attribute files on this csrow,
397 * namely, the DIMM labels and the channel ce_count
399 for (chan = 0; chan < csrow->nr_channels; chan++) {
400 err = edac_create_channel_files(&csrow->kobj, chan);
402 /* special case the unregister here */
403 kobject_put(&csrow->kobj);
407 kobject_uevent(&csrow->kobj, KOBJ_ADD);
410 /* error unwind stack */
411 err_release_top_kobj:
412 kobject_put(&mci->edac_mci_kobj);
418 /* default sysfs methods and data structures for the main MCI kobject */
420 static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
421 const char *data, size_t count)
425 mci->ue_noinfo_count = 0;
426 mci->ce_noinfo_count = 0;
430 for (row = 0; row < mci->nr_csrows; row++) {
431 struct csrow_info *ri = &mci->csrows[row];
436 for (chan = 0; chan < ri->nr_channels; chan++)
437 ri->channels[chan].ce_count = 0;
440 mci->start_time = jiffies;
444 /* memory scrubbing */
445 static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci,
446 const char *data, size_t count)
450 if (mci->set_sdram_scrub_rate) {
452 memctrl_int_store(&bandwidth, data, count);
454 if (!(*mci->set_sdram_scrub_rate) (mci, &bandwidth)) {
455 edac_printk(KERN_DEBUG, EDAC_MC,
456 "Scrub rate set successfully, applied: %d\n",
459 /* FIXME: error codes maybe? */
460 edac_printk(KERN_DEBUG, EDAC_MC,
461 "Scrub rate set FAILED, could not apply: %d\n",
465 /* FIXME: produce "not implemented" ERROR for user-side. */
466 edac_printk(KERN_WARNING, EDAC_MC,
467 "Memory scrubbing 'set'control is not implemented!\n");
472 static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data)
476 if (mci->get_sdram_scrub_rate) {
477 if (!(*mci->get_sdram_scrub_rate) (mci, &bandwidth)) {
478 edac_printk(KERN_DEBUG, EDAC_MC,
479 "Scrub rate successfully, fetched: %d\n",
482 /* FIXME: error codes maybe? */
483 edac_printk(KERN_DEBUG, EDAC_MC,
484 "Scrub rate fetch FAILED, got: %d\n",
488 /* FIXME: produce "not implemented" ERROR for user-side. */
489 edac_printk(KERN_WARNING, EDAC_MC,
490 "Memory scrubbing 'get' control is not implemented\n");
492 return sprintf(data, "%d\n", bandwidth);
495 /* default attribute files for the MCI object */
496 static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
498 return sprintf(data, "%d\n", mci->ue_count);
501 static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
503 return sprintf(data, "%d\n", mci->ce_count);
506 static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
508 return sprintf(data, "%d\n", mci->ce_noinfo_count);
511 static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
513 return sprintf(data, "%d\n", mci->ue_noinfo_count);
516 static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data)
518 return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
521 static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
523 return sprintf(data, "%s\n", mci->ctl_name);
526 static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data)
528 int total_pages, csrow_idx;
530 for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows;
532 struct csrow_info *csrow = &mci->csrows[csrow_idx];
534 if (!csrow->nr_pages)
537 total_pages += csrow->nr_pages;
540 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
543 #define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
544 #define to_mcidev_attr(a) container_of(a,struct mcidev_sysfs_attribute,attr)
546 /* MCI show/store functions for top most object */
547 static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
550 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
551 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
553 if (mcidev_attr->show)
554 return mcidev_attr->show(mem_ctl_info, buffer);
559 static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr,
560 const char *buffer, size_t count)
562 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
563 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
565 if (mcidev_attr->store)
566 return mcidev_attr->store(mem_ctl_info, buffer, count);
571 /* Intermediate show/store table */
572 static struct sysfs_ops mci_ops = {
574 .store = mcidev_store
577 #define MCIDEV_ATTR(_name,_mode,_show,_store) \
578 static struct mcidev_sysfs_attribute mci_attr_##_name = { \
579 .attr = {.name = __stringify(_name), .mode = _mode }, \
584 /* default Control file */
585 MCIDEV_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
587 /* default Attribute files */
588 MCIDEV_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
589 MCIDEV_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
590 MCIDEV_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
591 MCIDEV_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
592 MCIDEV_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
593 MCIDEV_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
594 MCIDEV_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
596 /* memory scrubber attribute file */
597 MCIDEV_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show,
598 mci_sdram_scrub_rate_store);
600 static struct mcidev_sysfs_attribute *mci_attr[] = {
601 &mci_attr_reset_counters,
604 &mci_attr_seconds_since_reset,
605 &mci_attr_ue_noinfo_count,
606 &mci_attr_ce_noinfo_count,
609 &mci_attr_sdram_scrub_rate,
615 * Release of a MC controlling instance
617 * each MC control instance has the following resources upon entry:
618 * a) a ref count on the top memctl kobj
619 * b) a ref count on this module
621 * this function must decrement those ref counts and then
622 * issue a free on the instance's memory
624 static void edac_mci_control_release(struct kobject *kobj)
626 struct mem_ctl_info *mci;
630 debugf0("%s() mci instance idx=%d releasing\n", __func__, mci->mc_idx);
632 /* decrement the module ref count */
633 module_put(mci->owner);
635 /* free the mci instance memory here */
639 static struct kobj_type ktype_mci = {
640 .release = edac_mci_control_release,
641 .sysfs_ops = &mci_ops,
642 .default_attrs = (struct attribute **)mci_attr,
645 /* EDAC memory controller sysfs kset:
646 * /sys/devices/system/edac/mc
648 static struct kset mc_kset;
651 * edac_mc_register_sysfs_main_kobj
653 * setups and registers the main kobject for each mci
655 int edac_mc_register_sysfs_main_kobj(struct mem_ctl_info *mci)
657 struct kobject *kobj_mci;
660 debugf1("%s()\n", __func__);
662 kobj_mci = &mci->edac_mci_kobj;
664 /* Init the mci's kobject */
665 memset(kobj_mci, 0, sizeof(*kobj_mci));
667 /* Record which module 'owns' this control structure
668 * and bump the ref count of the module
670 mci->owner = THIS_MODULE;
672 /* bump ref count on this module */
673 if (!try_module_get(mci->owner)) {
678 /* this instance become part of the mc_kset */
679 kobj_mci->kset = &mc_kset;
681 /* register the mc<id> kobject to the mc_kset */
682 err = kobject_init_and_add(kobj_mci, &ktype_mci, NULL,
683 "mc%d", mci->mc_idx);
685 debugf1("%s()Failed to register '.../edac/mc%d'\n",
686 __func__, mci->mc_idx);
689 kobject_uevent(kobj_mci, KOBJ_ADD);
691 /* At this point, to 'free' the control struct,
692 * edac_mc_unregister_sysfs_main_kobj() must be used
695 debugf1("%s() Registered '.../edac/mc%d' kobject\n",
696 __func__, mci->mc_idx);
700 /* Error exit stack */
703 module_put(mci->owner);
710 * edac_mc_register_sysfs_main_kobj
712 * tears down and the main mci kobject from the mc_kset
714 void edac_mc_unregister_sysfs_main_kobj(struct mem_ctl_info *mci)
716 /* delete the kobj from the mc_kset */
717 kobject_put(&mci->edac_mci_kobj);
720 #define EDAC_DEVICE_SYMLINK "device"
723 * edac_create_mci_instance_attributes
724 * create MC driver specific attributes at the topmost level
725 * directory of this mci instance.
727 static int edac_create_mci_instance_attributes(struct mem_ctl_info *mci)
730 struct mcidev_sysfs_attribute *sysfs_attrib;
732 /* point to the start of the array and iterate over it
733 * adding each attribute listed to this mci instance's kobject
735 sysfs_attrib = mci->mc_driver_sysfs_attributes;
737 while (sysfs_attrib && sysfs_attrib->attr.name) {
738 err = sysfs_create_file(&mci->edac_mci_kobj,
739 (struct attribute*) sysfs_attrib);
751 * edac_remove_mci_instance_attributes
752 * remove MC driver specific attributes at the topmost level
753 * directory of this mci instance.
755 static void edac_remove_mci_instance_attributes(struct mem_ctl_info *mci)
757 struct mcidev_sysfs_attribute *sysfs_attrib;
759 /* point to the start of the array and iterate over it
760 * adding each attribute listed to this mci instance's kobject
762 sysfs_attrib = mci->mc_driver_sysfs_attributes;
764 /* loop if there are attributes and until we hit a NULL entry */
765 while (sysfs_attrib && sysfs_attrib->attr.name) {
766 sysfs_remove_file(&mci->edac_mci_kobj,
767 (struct attribute *) sysfs_attrib);
774 * Create a new Memory Controller kobject instance,
775 * mc<id> under the 'mc' directory
781 int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
785 struct csrow_info *csrow;
786 struct kobject *kobj_mci = &mci->edac_mci_kobj;
788 debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
790 /* create a symlink for the device */
791 err = sysfs_create_link(kobj_mci, &mci->dev->kobj,
792 EDAC_DEVICE_SYMLINK);
794 debugf1("%s() failure to create symlink\n", __func__);
798 /* If the low level driver desires some attributes,
799 * then create them now for the driver.
801 if (mci->mc_driver_sysfs_attributes) {
802 err = edac_create_mci_instance_attributes(mci);
804 debugf1("%s() failure to create mci attributes\n",
810 /* Make directories for each CSROW object under the mc<id> kobject
812 for (i = 0; i < mci->nr_csrows; i++) {
813 csrow = &mci->csrows[i];
815 /* Only expose populated CSROWs */
816 if (csrow->nr_pages > 0) {
817 err = edac_create_csrow_object(mci, csrow, i);
819 debugf1("%s() failure: create csrow %d obj\n",
828 /* CSROW error: backout what has already been registered, */
830 for (i--; i >= 0; i--) {
831 if (csrow->nr_pages > 0) {
832 kobject_put(&mci->csrows[i].kobj);
836 /* remove the mci instance's attributes, if any */
837 edac_remove_mci_instance_attributes(mci);
839 /* remove the symlink */
840 sysfs_remove_link(kobj_mci, EDAC_DEVICE_SYMLINK);
847 * remove a Memory Controller instance
849 void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
853 debugf0("%s()\n", __func__);
855 /* remove all csrow kobjects */
856 for (i = 0; i < mci->nr_csrows; i++) {
857 if (mci->csrows[i].nr_pages > 0) {
858 debugf0("%s() unreg csrow-%d\n", __func__, i);
859 kobject_put(&mci->csrows[i].kobj);
863 debugf0("%s() remove_link\n", __func__);
865 /* remove the symlink */
866 sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
868 debugf0("%s() remove_mci_instance\n", __func__);
870 /* remove this mci instance's attribtes */
871 edac_remove_mci_instance_attributes(mci);
873 debugf0("%s() unregister this mci kobj\n", __func__);
875 /* unregister this instance's kobject */
876 kobject_put(&mci->edac_mci_kobj);
883 * edac_setup_sysfs_mc_kset(void)
885 * Initialize the mc_kset for the 'mc' entry
886 * This requires creating the top 'mc' directory with a kset
887 * and its controls/attributes.
889 * To this 'mc' kset, instance 'mci' will be grouped as children.
892 * !0 FAILURE error code
894 int edac_sysfs_setup_mc_kset(void)
897 struct sysdev_class *edac_class;
899 debugf1("%s()\n", __func__);
901 /* get the /sys/devices/system/edac class reference */
902 edac_class = edac_get_edac_class();
903 if (edac_class == NULL) {
904 debugf1("%s() no edac_class error=%d\n", __func__, err);
908 /* Init the MC's kobject */
909 kobject_set_name(&mc_kset.kobj, "mc");
910 mc_kset.kobj.parent = &edac_class->kset.kobj;
912 /* register the mc_kset */
913 err = kset_register(&mc_kset);
915 debugf1("%s() Failed to register '.../edac/mc'\n", __func__);
919 debugf1("%s() Registered '.../edac/mc' kobject\n", __func__);
924 /* error unwind stack */
930 * edac_sysfs_teardown_mc_kset
932 * deconstruct the mc_ket for memory controllers
934 void edac_sysfs_teardown_mc_kset(void)
936 kset_unregister(&mc_kset);