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"
127 * /sys/devices/system/edac/mc;
128 * data structures and methods
130 static ssize_t memctrl_int_show(void *ptr, char *buffer)
132 int *value = (int *)ptr;
133 return sprintf(buffer, "%u\n", *value);
136 static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count)
138 int *value = (int *)ptr;
140 if (isdigit(*buffer))
141 *value = simple_strtoul(buffer, NULL, 0);
147 * mc poll_msec time value
149 static ssize_t poll_msec_int_store(void *ptr, const char *buffer, size_t count)
151 int *value = (int *)ptr;
153 if (isdigit(*buffer)) {
154 *value = simple_strtoul(buffer, NULL, 0);
156 /* notify edac_mc engine to reset the poll period */
157 edac_mc_reset_delay_period(*value);
164 /* EDAC sysfs CSROW data structures and methods
167 /* Set of more default csrow<id> attribute show/store functions */
168 static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data,
171 return sprintf(data, "%u\n", csrow->ue_count);
174 static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data,
177 return sprintf(data, "%u\n", csrow->ce_count);
180 static ssize_t csrow_size_show(struct csrow_info *csrow, char *data,
183 return sprintf(data, "%u\n", PAGES_TO_MiB(csrow->nr_pages));
186 static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data,
189 return sprintf(data, "%s\n", mem_types[csrow->mtype]);
192 static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data,
195 return sprintf(data, "%s\n", dev_types[csrow->dtype]);
198 static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data,
201 return sprintf(data, "%s\n", edac_caps[csrow->edac_mode]);
204 /* show/store functions for DIMM Label attributes */
205 static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
206 char *data, int channel)
208 return snprintf(data, EDAC_MC_LABEL_LEN, "%s",
209 csrow->channels[channel].label);
212 static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
214 size_t count, int channel)
216 ssize_t max_size = 0;
218 max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
219 strncpy(csrow->channels[channel].label, data, max_size);
220 csrow->channels[channel].label[max_size] = '\0';
225 /* show function for dynamic chX_ce_count attribute */
226 static ssize_t channel_ce_count_show(struct csrow_info *csrow,
227 char *data, int channel)
229 return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
232 /* csrow specific attribute structure */
233 struct csrowdev_attribute {
234 struct attribute attr;
235 ssize_t(*show) (struct csrow_info *, char *, int);
236 ssize_t(*store) (struct csrow_info *, const char *, size_t, int);
240 #define to_csrow(k) container_of(k, struct csrow_info, kobj)
241 #define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
243 /* Set of show/store higher level functions for default csrow attributes */
244 static ssize_t csrowdev_show(struct kobject *kobj,
245 struct attribute *attr, char *buffer)
247 struct csrow_info *csrow = to_csrow(kobj);
248 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
250 if (csrowdev_attr->show)
251 return csrowdev_attr->show(csrow,
252 buffer, csrowdev_attr->private);
256 static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
257 const char *buffer, size_t count)
259 struct csrow_info *csrow = to_csrow(kobj);
260 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
262 if (csrowdev_attr->store)
263 return csrowdev_attr->store(csrow,
265 count, csrowdev_attr->private);
269 static struct sysfs_ops csrowfs_ops = {
270 .show = csrowdev_show,
271 .store = csrowdev_store
274 #define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \
275 static struct csrowdev_attribute attr_##_name = { \
276 .attr = {.name = __stringify(_name), .mode = _mode }, \
279 .private = _private, \
282 /* default cwrow<id>/attribute files */
283 CSROWDEV_ATTR(size_mb, S_IRUGO, csrow_size_show, NULL, 0);
284 CSROWDEV_ATTR(dev_type, S_IRUGO, csrow_dev_type_show, NULL, 0);
285 CSROWDEV_ATTR(mem_type, S_IRUGO, csrow_mem_type_show, NULL, 0);
286 CSROWDEV_ATTR(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL, 0);
287 CSROWDEV_ATTR(ue_count, S_IRUGO, csrow_ue_count_show, NULL, 0);
288 CSROWDEV_ATTR(ce_count, S_IRUGO, csrow_ce_count_show, NULL, 0);
290 /* default attributes of the CSROW<id> object */
291 static struct csrowdev_attribute *default_csrow_attr[] = {
301 /* possible dynamic channel DIMM Label attribute files */
302 CSROWDEV_ATTR(ch0_dimm_label, S_IRUGO | S_IWUSR,
303 channel_dimm_label_show, channel_dimm_label_store, 0);
304 CSROWDEV_ATTR(ch1_dimm_label, S_IRUGO | S_IWUSR,
305 channel_dimm_label_show, channel_dimm_label_store, 1);
306 CSROWDEV_ATTR(ch2_dimm_label, S_IRUGO | S_IWUSR,
307 channel_dimm_label_show, channel_dimm_label_store, 2);
308 CSROWDEV_ATTR(ch3_dimm_label, S_IRUGO | S_IWUSR,
309 channel_dimm_label_show, channel_dimm_label_store, 3);
310 CSROWDEV_ATTR(ch4_dimm_label, S_IRUGO | S_IWUSR,
311 channel_dimm_label_show, channel_dimm_label_store, 4);
312 CSROWDEV_ATTR(ch5_dimm_label, S_IRUGO | S_IWUSR,
313 channel_dimm_label_show, channel_dimm_label_store, 5);
315 /* Total possible dynamic DIMM Label attribute file table */
316 static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
317 &attr_ch0_dimm_label,
318 &attr_ch1_dimm_label,
319 &attr_ch2_dimm_label,
320 &attr_ch3_dimm_label,
321 &attr_ch4_dimm_label,
325 /* possible dynamic channel ce_count attribute files */
326 CSROWDEV_ATTR(ch0_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 0);
327 CSROWDEV_ATTR(ch1_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 1);
328 CSROWDEV_ATTR(ch2_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 2);
329 CSROWDEV_ATTR(ch3_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 3);
330 CSROWDEV_ATTR(ch4_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 4);
331 CSROWDEV_ATTR(ch5_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 5);
333 /* Total possible dynamic ce_count attribute file table */
334 static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
343 #define EDAC_NR_CHANNELS 6
345 /* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */
346 static int edac_create_channel_files(struct kobject *kobj, int chan)
350 if (chan >= EDAC_NR_CHANNELS)
353 /* create the DIMM label attribute file */
354 err = sysfs_create_file(kobj,
356 dynamic_csrow_dimm_attr[chan]);
359 /* create the CE Count attribute file */
360 err = sysfs_create_file(kobj,
362 dynamic_csrow_ce_count_attr[chan]);
364 debugf1("%s() dimm labels and ce_count files created",
371 /* No memory to release for this kobj */
372 static void edac_csrow_instance_release(struct kobject *kobj)
374 struct mem_ctl_info *mci;
375 struct csrow_info *cs;
377 debugf1("%s()\n", __func__);
379 cs = container_of(kobj, struct csrow_info, kobj);
382 kobject_put(&mci->edac_mci_kobj);
385 /* the kobj_type instance for a CSROW */
386 static struct kobj_type ktype_csrow = {
387 .release = edac_csrow_instance_release,
388 .sysfs_ops = &csrowfs_ops,
389 .default_attrs = (struct attribute **)default_csrow_attr,
392 /* Create a CSROW object under specifed edac_mc_device */
393 static int edac_create_csrow_object(struct mem_ctl_info *mci,
394 struct csrow_info *csrow, int index)
396 struct kobject *kobj_mci = &mci->edac_mci_kobj;
397 struct kobject *kobj;
401 /* generate ..../edac/mc/mc<id>/csrow<index> */
402 memset(&csrow->kobj, 0, sizeof(csrow->kobj));
403 csrow->mci = mci; /* include container up link */
405 /* bump the mci instance's kobject's ref count */
406 kobj = kobject_get(&mci->edac_mci_kobj);
412 /* Instanstiate the csrow object */
413 err = kobject_init_and_add(&csrow->kobj, &ktype_csrow, kobj_mci,
416 goto err_release_top_kobj;
418 /* At this point, to release a csrow kobj, one must
419 * call the kobject_put and allow that tear down
420 * to work the releasing
423 /* Create the dyanmic attribute files on this csrow,
424 * namely, the DIMM labels and the channel ce_count
426 for (chan = 0; chan < csrow->nr_channels; chan++) {
427 err = edac_create_channel_files(&csrow->kobj, chan);
429 /* special case the unregister here */
430 kobject_put(&csrow->kobj);
434 kobject_uevent(&csrow->kobj, KOBJ_ADD);
437 /* error unwind stack */
438 err_release_top_kobj:
439 kobject_put(&mci->edac_mci_kobj);
445 /* default sysfs methods and data structures for the main MCI kobject */
447 static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
448 const char *data, size_t count)
452 mci->ue_noinfo_count = 0;
453 mci->ce_noinfo_count = 0;
457 for (row = 0; row < mci->nr_csrows; row++) {
458 struct csrow_info *ri = &mci->csrows[row];
463 for (chan = 0; chan < ri->nr_channels; chan++)
464 ri->channels[chan].ce_count = 0;
467 mci->start_time = jiffies;
471 /* memory scrubbing */
472 static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci,
473 const char *data, size_t count)
477 if (mci->set_sdram_scrub_rate) {
479 memctrl_int_store(&bandwidth, data, count);
481 if (!(*mci->set_sdram_scrub_rate) (mci, &bandwidth)) {
482 edac_printk(KERN_DEBUG, EDAC_MC,
483 "Scrub rate set successfully, applied: %d\n",
486 /* FIXME: error codes maybe? */
487 edac_printk(KERN_DEBUG, EDAC_MC,
488 "Scrub rate set FAILED, could not apply: %d\n",
492 /* FIXME: produce "not implemented" ERROR for user-side. */
493 edac_printk(KERN_WARNING, EDAC_MC,
494 "Memory scrubbing 'set'control is not implemented!\n");
499 static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data)
503 if (mci->get_sdram_scrub_rate) {
504 if (!(*mci->get_sdram_scrub_rate) (mci, &bandwidth)) {
505 edac_printk(KERN_DEBUG, EDAC_MC,
506 "Scrub rate successfully, fetched: %d\n",
509 /* FIXME: error codes maybe? */
510 edac_printk(KERN_DEBUG, EDAC_MC,
511 "Scrub rate fetch FAILED, got: %d\n",
515 /* FIXME: produce "not implemented" ERROR for user-side. */
516 edac_printk(KERN_WARNING, EDAC_MC,
517 "Memory scrubbing 'get' control is not implemented\n");
519 return sprintf(data, "%d\n", bandwidth);
522 /* default attribute files for the MCI object */
523 static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
525 return sprintf(data, "%d\n", mci->ue_count);
528 static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
530 return sprintf(data, "%d\n", mci->ce_count);
533 static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
535 return sprintf(data, "%d\n", mci->ce_noinfo_count);
538 static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
540 return sprintf(data, "%d\n", mci->ue_noinfo_count);
543 static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data)
545 return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
548 static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
550 return sprintf(data, "%s\n", mci->ctl_name);
553 static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data)
555 int total_pages, csrow_idx;
557 for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows;
559 struct csrow_info *csrow = &mci->csrows[csrow_idx];
561 if (!csrow->nr_pages)
564 total_pages += csrow->nr_pages;
567 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
570 #define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
571 #define to_mcidev_attr(a) container_of(a,struct mcidev_sysfs_attribute,attr)
573 /* MCI show/store functions for top most object */
574 static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
577 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
578 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
580 if (mcidev_attr->show)
581 return mcidev_attr->show(mem_ctl_info, buffer);
586 static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr,
587 const char *buffer, size_t count)
589 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
590 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
592 if (mcidev_attr->store)
593 return mcidev_attr->store(mem_ctl_info, buffer, count);
598 /* Intermediate show/store table */
599 static struct sysfs_ops mci_ops = {
601 .store = mcidev_store
604 #define MCIDEV_ATTR(_name,_mode,_show,_store) \
605 static struct mcidev_sysfs_attribute mci_attr_##_name = { \
606 .attr = {.name = __stringify(_name), .mode = _mode }, \
611 /* default Control file */
612 MCIDEV_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
614 /* default Attribute files */
615 MCIDEV_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
616 MCIDEV_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
617 MCIDEV_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
618 MCIDEV_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
619 MCIDEV_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
620 MCIDEV_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
621 MCIDEV_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
623 /* memory scrubber attribute file */
624 MCIDEV_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show,
625 mci_sdram_scrub_rate_store);
627 static struct mcidev_sysfs_attribute *mci_attr[] = {
628 &mci_attr_reset_counters,
631 &mci_attr_seconds_since_reset,
632 &mci_attr_ue_noinfo_count,
633 &mci_attr_ce_noinfo_count,
636 &mci_attr_sdram_scrub_rate,
642 * Release of a MC controlling instance
644 * each MC control instance has the following resources upon entry:
645 * a) a ref count on the top memctl kobj
646 * b) a ref count on this module
648 * this function must decrement those ref counts and then
649 * issue a free on the instance's memory
651 static void edac_mci_control_release(struct kobject *kobj)
653 struct mem_ctl_info *mci;
657 debugf0("%s() mci instance idx=%d releasing\n", __func__, mci->mc_idx);
659 /* decrement the module ref count */
660 module_put(mci->owner);
662 /* free the mci instance memory here */
666 static struct kobj_type ktype_mci = {
667 .release = edac_mci_control_release,
668 .sysfs_ops = &mci_ops,
669 .default_attrs = (struct attribute **)mci_attr,
672 /* show/store, tables, etc for the MC kset */
675 struct memctrl_dev_attribute {
676 struct attribute attr;
678 ssize_t(*show) (void *, char *);
679 ssize_t(*store) (void *, const char *, size_t);
682 /* Set of show/store abstract level functions for memory control object */
683 static ssize_t memctrl_dev_show(struct kobject *kobj,
684 struct attribute *attr, char *buffer)
686 struct memctrl_dev_attribute *memctrl_dev;
687 memctrl_dev = (struct memctrl_dev_attribute *)attr;
689 if (memctrl_dev->show)
690 return memctrl_dev->show(memctrl_dev->value, buffer);
695 static ssize_t memctrl_dev_store(struct kobject *kobj, struct attribute *attr,
696 const char *buffer, size_t count)
698 struct memctrl_dev_attribute *memctrl_dev;
699 memctrl_dev = (struct memctrl_dev_attribute *)attr;
701 if (memctrl_dev->store)
702 return memctrl_dev->store(memctrl_dev->value, buffer, count);
707 static struct sysfs_ops memctrlfs_ops = {
708 .show = memctrl_dev_show,
709 .store = memctrl_dev_store
712 #define MEMCTRL_ATTR(_name, _mode, _show, _store) \
713 static struct memctrl_dev_attribute attr_##_name = { \
714 .attr = {.name = __stringify(_name), .mode = _mode }, \
720 #define MEMCTRL_STRING_ATTR(_name, _data, _mode, _show, _store) \
721 static struct memctrl_dev_attribute attr_##_name = { \
722 .attr = {.name = __stringify(_name), .mode = _mode }, \
728 /* csrow<id> control files */
729 MEMCTRL_ATTR(edac_mc_panic_on_ue,
730 S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
732 MEMCTRL_ATTR(edac_mc_log_ue,
733 S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
735 MEMCTRL_ATTR(edac_mc_log_ce,
736 S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
738 MEMCTRL_ATTR(edac_mc_poll_msec,
739 S_IRUGO | S_IWUSR, memctrl_int_show, poll_msec_int_store);
741 /* Base Attributes of the memory ECC object */
742 static struct memctrl_dev_attribute *memctrl_attr[] = {
743 &attr_edac_mc_panic_on_ue,
744 &attr_edac_mc_log_ue,
745 &attr_edac_mc_log_ce,
746 &attr_edac_mc_poll_msec,
751 /* the ktype for the mc_kset internal kobj */
752 static struct kobj_type ktype_mc_set_attribs = {
753 .sysfs_ops = &memctrlfs_ops,
754 .default_attrs = (struct attribute **)memctrl_attr,
757 /* EDAC memory controller sysfs kset:
758 * /sys/devices/system/edac/mc
760 static struct kset mc_kset = {
761 .kobj = {.ktype = &ktype_mc_set_attribs },
766 * edac_mc_register_sysfs_main_kobj
768 * setups and registers the main kobject for each mci
770 int edac_mc_register_sysfs_main_kobj(struct mem_ctl_info *mci)
772 struct kobject *kobj_mci;
775 debugf1("%s()\n", __func__);
777 kobj_mci = &mci->edac_mci_kobj;
779 /* Init the mci's kobject */
780 memset(kobj_mci, 0, sizeof(*kobj_mci));
782 /* Record which module 'owns' this control structure
783 * and bump the ref count of the module
785 mci->owner = THIS_MODULE;
787 /* bump ref count on this module */
788 if (!try_module_get(mci->owner)) {
793 /* this instance become part of the mc_kset */
794 kobj_mci->kset = &mc_kset;
796 /* register the mc<id> kobject to the mc_kset */
797 err = kobject_init_and_add(kobj_mci, &ktype_mci, NULL,
798 "mc%d", mci->mc_idx);
800 debugf1("%s()Failed to register '.../edac/mc%d'\n",
801 __func__, mci->mc_idx);
804 kobject_uevent(kobj_mci, KOBJ_ADD);
806 /* At this point, to 'free' the control struct,
807 * edac_mc_unregister_sysfs_main_kobj() must be used
810 debugf1("%s() Registered '.../edac/mc%d' kobject\n",
811 __func__, mci->mc_idx);
815 /* Error exit stack */
818 module_put(mci->owner);
825 * edac_mc_register_sysfs_main_kobj
827 * tears down and the main mci kobject from the mc_kset
829 void edac_mc_unregister_sysfs_main_kobj(struct mem_ctl_info *mci)
831 /* delete the kobj from the mc_kset */
832 kobject_put(&mci->edac_mci_kobj);
835 #define EDAC_DEVICE_SYMLINK "device"
838 * edac_create_mci_instance_attributes
839 * create MC driver specific attributes at the topmost level
840 * directory of this mci instance.
842 static int edac_create_mci_instance_attributes(struct mem_ctl_info *mci)
845 struct mcidev_sysfs_attribute *sysfs_attrib;
847 /* point to the start of the array and iterate over it
848 * adding each attribute listed to this mci instance's kobject
850 sysfs_attrib = mci->mc_driver_sysfs_attributes;
852 while (sysfs_attrib && sysfs_attrib->attr.name) {
853 err = sysfs_create_file(&mci->edac_mci_kobj,
854 (struct attribute*) sysfs_attrib);
866 * edac_remove_mci_instance_attributes
867 * remove MC driver specific attributes at the topmost level
868 * directory of this mci instance.
870 static void edac_remove_mci_instance_attributes(struct mem_ctl_info *mci)
872 struct mcidev_sysfs_attribute *sysfs_attrib;
874 /* point to the start of the array and iterate over it
875 * adding each attribute listed to this mci instance's kobject
877 sysfs_attrib = mci->mc_driver_sysfs_attributes;
879 /* loop if there are attributes and until we hit a NULL entry */
880 while (sysfs_attrib && sysfs_attrib->attr.name) {
881 sysfs_remove_file(&mci->edac_mci_kobj,
882 (struct attribute *) sysfs_attrib);
889 * Create a new Memory Controller kobject instance,
890 * mc<id> under the 'mc' directory
896 int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
900 struct csrow_info *csrow;
901 struct kobject *kobj_mci = &mci->edac_mci_kobj;
903 debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
905 /* create a symlink for the device */
906 err = sysfs_create_link(kobj_mci, &mci->dev->kobj,
907 EDAC_DEVICE_SYMLINK);
909 debugf1("%s() failure to create symlink\n", __func__);
913 /* If the low level driver desires some attributes,
914 * then create them now for the driver.
916 if (mci->mc_driver_sysfs_attributes) {
917 err = edac_create_mci_instance_attributes(mci);
919 debugf1("%s() failure to create mci attributes\n",
925 /* Make directories for each CSROW object under the mc<id> kobject
927 for (i = 0; i < mci->nr_csrows; i++) {
928 csrow = &mci->csrows[i];
930 /* Only expose populated CSROWs */
931 if (csrow->nr_pages > 0) {
932 err = edac_create_csrow_object(mci, csrow, i);
934 debugf1("%s() failure: create csrow %d obj\n",
943 /* CSROW error: backout what has already been registered, */
945 for (i--; i >= 0; i--) {
946 if (csrow->nr_pages > 0) {
947 kobject_put(&mci->csrows[i].kobj);
951 /* remove the mci instance's attributes, if any */
952 edac_remove_mci_instance_attributes(mci);
954 /* remove the symlink */
955 sysfs_remove_link(kobj_mci, EDAC_DEVICE_SYMLINK);
962 * remove a Memory Controller instance
964 void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
968 debugf0("%s()\n", __func__);
970 /* remove all csrow kobjects */
971 for (i = 0; i < mci->nr_csrows; i++) {
972 if (mci->csrows[i].nr_pages > 0) {
973 debugf0("%s() unreg csrow-%d\n", __func__, i);
974 kobject_put(&mci->csrows[i].kobj);
978 debugf0("%s() remove_link\n", __func__);
980 /* remove the symlink */
981 sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
983 debugf0("%s() remove_mci_instance\n", __func__);
985 /* remove this mci instance's attribtes */
986 edac_remove_mci_instance_attributes(mci);
988 debugf0("%s() unregister this mci kobj\n", __func__);
990 /* unregister this instance's kobject */
991 kobject_put(&mci->edac_mci_kobj);
998 * edac_setup_sysfs_mc_kset(void)
1000 * Initialize the mc_kset for the 'mc' entry
1001 * This requires creating the top 'mc' directory with a kset
1002 * and its controls/attributes.
1004 * To this 'mc' kset, instance 'mci' will be grouped as children.
1007 * !0 FAILURE error code
1009 int edac_sysfs_setup_mc_kset(void)
1012 struct sysdev_class *edac_class;
1014 debugf1("%s()\n", __func__);
1016 /* get the /sys/devices/system/edac class reference */
1017 edac_class = edac_get_edac_class();
1018 if (edac_class == NULL) {
1019 debugf1("%s() no edac_class error=%d\n", __func__, err);
1023 /* Init the MC's kobject */
1024 kobject_set_name(&mc_kset.kobj, "mc");
1025 mc_kset.kobj.parent = &edac_class->kset.kobj;
1027 /* register the mc_kset */
1028 err = kset_register(&mc_kset);
1030 debugf1("%s() Failed to register '.../edac/mc'\n", __func__);
1034 debugf1("%s() Registered '.../edac/mc' kobject\n", __func__);
1039 /* error unwind stack */
1045 * edac_sysfs_teardown_mc_kset
1047 * deconstruct the mc_ket for memory controllers
1049 void edac_sysfs_teardown_mc_kset(void)
1051 kset_unregister(&mc_kset);