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/slab.h>
14 #include <linux/bug.h>
16 #include "edac_core.h"
17 #include "edac_module.h"
20 /* MC EDAC Controls, setable by module parameter, and sysfs */
21 static int edac_mc_log_ue = 1;
22 static int edac_mc_log_ce = 1;
23 static int edac_mc_panic_on_ue;
24 static int edac_mc_poll_msec = 1000;
26 /* Getter functions for above */
27 int edac_mc_get_log_ue(void)
29 return edac_mc_log_ue;
32 int edac_mc_get_log_ce(void)
34 return edac_mc_log_ce;
37 int edac_mc_get_panic_on_ue(void)
39 return edac_mc_panic_on_ue;
42 /* this is temporary */
43 int edac_mc_get_poll_msec(void)
45 return edac_mc_poll_msec;
48 static int edac_set_poll_msec(const char *val, struct kernel_param *kp)
56 ret = strict_strtol(val, 0, &l);
57 if (ret == -EINVAL || ((int)l != l))
59 *((int *)kp->arg) = l;
61 /* notify edac_mc engine to reset the poll period */
62 edac_mc_reset_delay_period(l);
67 /* Parameter declarations for above */
68 module_param(edac_mc_panic_on_ue, int, 0644);
69 MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
70 module_param(edac_mc_log_ue, int, 0644);
71 MODULE_PARM_DESC(edac_mc_log_ue,
72 "Log uncorrectable error to console: 0=off 1=on");
73 module_param(edac_mc_log_ce, int, 0644);
74 MODULE_PARM_DESC(edac_mc_log_ce,
75 "Log correctable error to console: 0=off 1=on");
76 module_param_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_int,
77 &edac_mc_poll_msec, 0644);
78 MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
81 * various constants for Memory Controllers
83 static const char *mem_types[] = {
84 [MEM_EMPTY] = "Empty",
85 [MEM_RESERVED] = "Reserved",
86 [MEM_UNKNOWN] = "Unknown",
90 [MEM_SDR] = "Unbuffered-SDR",
91 [MEM_RDR] = "Registered-SDR",
92 [MEM_DDR] = "Unbuffered-DDR",
93 [MEM_RDDR] = "Registered-DDR",
95 [MEM_DDR2] = "Unbuffered-DDR2",
96 [MEM_FB_DDR2] = "FullyBuffered-DDR2",
97 [MEM_RDDR2] = "Registered-DDR2",
99 [MEM_DDR3] = "Unbuffered-DDR3",
100 [MEM_RDDR3] = "Registered-DDR3"
103 static const char *dev_types[] = {
104 [DEV_UNKNOWN] = "Unknown",
114 static const char *edac_caps[] = {
115 [EDAC_UNKNOWN] = "Unknown",
116 [EDAC_NONE] = "None",
117 [EDAC_RESERVED] = "Reserved",
118 [EDAC_PARITY] = "PARITY",
120 [EDAC_SECDED] = "SECDED",
121 [EDAC_S2ECD2ED] = "S2ECD2ED",
122 [EDAC_S4ECD4ED] = "S4ECD4ED",
123 [EDAC_S8ECD8ED] = "S8ECD8ED",
124 [EDAC_S16ECD16ED] = "S16ECD16ED"
129 static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count)
131 int *value = (int *)ptr;
133 if (isdigit(*buffer))
134 *value = simple_strtoul(buffer, NULL, 0);
140 /* EDAC sysfs CSROW data structures and methods
143 /* Set of more default csrow<id> attribute show/store functions */
144 static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data,
147 return sprintf(data, "%u\n", csrow->ue_count);
150 static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data,
153 return sprintf(data, "%u\n", csrow->ce_count);
156 static ssize_t csrow_size_show(struct csrow_info *csrow, char *data,
159 return sprintf(data, "%u\n", PAGES_TO_MiB(csrow->nr_pages));
162 static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data,
165 return sprintf(data, "%s\n", mem_types[csrow->mtype]);
168 static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data,
171 return sprintf(data, "%s\n", dev_types[csrow->dtype]);
174 static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data,
177 return sprintf(data, "%s\n", edac_caps[csrow->edac_mode]);
180 /* show/store functions for DIMM Label attributes */
181 static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
182 char *data, int channel)
184 /* if field has not been initialized, there is nothing to send */
185 if (!csrow->channels[channel].label[0])
188 return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n",
189 csrow->channels[channel].label);
192 static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
194 size_t count, int channel)
196 ssize_t max_size = 0;
198 max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
199 strncpy(csrow->channels[channel].label, data, max_size);
200 csrow->channels[channel].label[max_size] = '\0';
205 /* show function for dynamic chX_ce_count attribute */
206 static ssize_t channel_ce_count_show(struct csrow_info *csrow,
207 char *data, int channel)
209 return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
212 /* csrow specific attribute structure */
213 struct csrowdev_attribute {
214 struct attribute attr;
215 ssize_t(*show) (struct csrow_info *, char *, int);
216 ssize_t(*store) (struct csrow_info *, const char *, size_t, int);
220 #define to_csrow(k) container_of(k, struct csrow_info, kobj)
221 #define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
223 /* Set of show/store higher level functions for default csrow attributes */
224 static ssize_t csrowdev_show(struct kobject *kobj,
225 struct attribute *attr, char *buffer)
227 struct csrow_info *csrow = to_csrow(kobj);
228 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
230 if (csrowdev_attr->show)
231 return csrowdev_attr->show(csrow,
232 buffer, csrowdev_attr->private);
236 static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
237 const char *buffer, size_t count)
239 struct csrow_info *csrow = to_csrow(kobj);
240 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
242 if (csrowdev_attr->store)
243 return csrowdev_attr->store(csrow,
245 count, csrowdev_attr->private);
249 static const struct sysfs_ops csrowfs_ops = {
250 .show = csrowdev_show,
251 .store = csrowdev_store
254 #define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \
255 static struct csrowdev_attribute attr_##_name = { \
256 .attr = {.name = __stringify(_name), .mode = _mode }, \
259 .private = _private, \
262 /* default cwrow<id>/attribute files */
263 CSROWDEV_ATTR(size_mb, S_IRUGO, csrow_size_show, NULL, 0);
264 CSROWDEV_ATTR(dev_type, S_IRUGO, csrow_dev_type_show, NULL, 0);
265 CSROWDEV_ATTR(mem_type, S_IRUGO, csrow_mem_type_show, NULL, 0);
266 CSROWDEV_ATTR(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL, 0);
267 CSROWDEV_ATTR(ue_count, S_IRUGO, csrow_ue_count_show, NULL, 0);
268 CSROWDEV_ATTR(ce_count, S_IRUGO, csrow_ce_count_show, NULL, 0);
270 /* default attributes of the CSROW<id> object */
271 static struct csrowdev_attribute *default_csrow_attr[] = {
281 /* possible dynamic channel DIMM Label attribute files */
282 CSROWDEV_ATTR(ch0_dimm_label, S_IRUGO | S_IWUSR,
283 channel_dimm_label_show, channel_dimm_label_store, 0);
284 CSROWDEV_ATTR(ch1_dimm_label, S_IRUGO | S_IWUSR,
285 channel_dimm_label_show, channel_dimm_label_store, 1);
286 CSROWDEV_ATTR(ch2_dimm_label, S_IRUGO | S_IWUSR,
287 channel_dimm_label_show, channel_dimm_label_store, 2);
288 CSROWDEV_ATTR(ch3_dimm_label, S_IRUGO | S_IWUSR,
289 channel_dimm_label_show, channel_dimm_label_store, 3);
290 CSROWDEV_ATTR(ch4_dimm_label, S_IRUGO | S_IWUSR,
291 channel_dimm_label_show, channel_dimm_label_store, 4);
292 CSROWDEV_ATTR(ch5_dimm_label, S_IRUGO | S_IWUSR,
293 channel_dimm_label_show, channel_dimm_label_store, 5);
295 /* Total possible dynamic DIMM Label attribute file table */
296 static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
297 &attr_ch0_dimm_label,
298 &attr_ch1_dimm_label,
299 &attr_ch2_dimm_label,
300 &attr_ch3_dimm_label,
301 &attr_ch4_dimm_label,
305 /* possible dynamic channel ce_count attribute files */
306 CSROWDEV_ATTR(ch0_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 0);
307 CSROWDEV_ATTR(ch1_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 1);
308 CSROWDEV_ATTR(ch2_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 2);
309 CSROWDEV_ATTR(ch3_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 3);
310 CSROWDEV_ATTR(ch4_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 4);
311 CSROWDEV_ATTR(ch5_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 5);
313 /* Total possible dynamic ce_count attribute file table */
314 static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
323 #define EDAC_NR_CHANNELS 6
325 /* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */
326 static int edac_create_channel_files(struct kobject *kobj, int chan)
330 if (chan >= EDAC_NR_CHANNELS)
333 /* create the DIMM label attribute file */
334 err = sysfs_create_file(kobj,
336 dynamic_csrow_dimm_attr[chan]);
339 /* create the CE Count attribute file */
340 err = sysfs_create_file(kobj,
342 dynamic_csrow_ce_count_attr[chan]);
344 debugf1("%s() dimm labels and ce_count files created",
351 /* No memory to release for this kobj */
352 static void edac_csrow_instance_release(struct kobject *kobj)
354 struct mem_ctl_info *mci;
355 struct csrow_info *cs;
357 debugf1("%s()\n", __func__);
359 cs = container_of(kobj, struct csrow_info, kobj);
362 kobject_put(&mci->edac_mci_kobj);
365 /* the kobj_type instance for a CSROW */
366 static struct kobj_type ktype_csrow = {
367 .release = edac_csrow_instance_release,
368 .sysfs_ops = &csrowfs_ops,
369 .default_attrs = (struct attribute **)default_csrow_attr,
372 /* Create a CSROW object under specifed edac_mc_device */
373 static int edac_create_csrow_object(struct mem_ctl_info *mci,
374 struct csrow_info *csrow, int index)
376 struct kobject *kobj_mci = &mci->edac_mci_kobj;
377 struct kobject *kobj;
381 /* generate ..../edac/mc/mc<id>/csrow<index> */
382 memset(&csrow->kobj, 0, sizeof(csrow->kobj));
383 csrow->mci = mci; /* include container up link */
385 /* bump the mci instance's kobject's ref count */
386 kobj = kobject_get(&mci->edac_mci_kobj);
392 /* Instanstiate the csrow object */
393 err = kobject_init_and_add(&csrow->kobj, &ktype_csrow, kobj_mci,
396 goto err_release_top_kobj;
398 /* At this point, to release a csrow kobj, one must
399 * call the kobject_put and allow that tear down
400 * to work the releasing
403 /* Create the dyanmic attribute files on this csrow,
404 * namely, the DIMM labels and the channel ce_count
406 for (chan = 0; chan < csrow->nr_channels; chan++) {
407 err = edac_create_channel_files(&csrow->kobj, chan);
409 /* special case the unregister here */
410 kobject_put(&csrow->kobj);
414 kobject_uevent(&csrow->kobj, KOBJ_ADD);
417 /* error unwind stack */
418 err_release_top_kobj:
419 kobject_put(&mci->edac_mci_kobj);
425 /* default sysfs methods and data structures for the main MCI kobject */
427 static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
428 const char *data, size_t count)
432 mci->ue_noinfo_count = 0;
433 mci->ce_noinfo_count = 0;
437 for (row = 0; row < mci->nr_csrows; row++) {
438 struct csrow_info *ri = &mci->csrows[row];
443 for (chan = 0; chan < ri->nr_channels; chan++)
444 ri->channels[chan].ce_count = 0;
447 mci->start_time = jiffies;
451 /* memory scrubbing */
452 static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci,
453 const char *data, size_t count)
457 if (mci->set_sdram_scrub_rate) {
459 memctrl_int_store(&bandwidth, data, count);
461 if (!(*mci->set_sdram_scrub_rate) (mci, &bandwidth)) {
462 edac_printk(KERN_DEBUG, EDAC_MC,
463 "Scrub rate set successfully, applied: %d\n",
466 /* FIXME: error codes maybe? */
467 edac_printk(KERN_DEBUG, EDAC_MC,
468 "Scrub rate set FAILED, could not apply: %d\n",
472 /* FIXME: produce "not implemented" ERROR for user-side. */
473 edac_printk(KERN_WARNING, EDAC_MC,
474 "Memory scrubbing 'set'control is not implemented!\n");
479 static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data)
483 if (mci->get_sdram_scrub_rate) {
484 if (!(*mci->get_sdram_scrub_rate) (mci, &bandwidth)) {
485 edac_printk(KERN_DEBUG, EDAC_MC,
486 "Scrub rate successfully, fetched: %d\n",
489 /* FIXME: error codes maybe? */
490 edac_printk(KERN_DEBUG, EDAC_MC,
491 "Scrub rate fetch FAILED, got: %d\n",
495 /* FIXME: produce "not implemented" ERROR for user-side. */
496 edac_printk(KERN_WARNING, EDAC_MC,
497 "Memory scrubbing 'get' control is not implemented\n");
499 return sprintf(data, "%d\n", bandwidth);
502 /* default attribute files for the MCI object */
503 static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
505 return sprintf(data, "%d\n", mci->ue_count);
508 static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
510 return sprintf(data, "%d\n", mci->ce_count);
513 static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
515 return sprintf(data, "%d\n", mci->ce_noinfo_count);
518 static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
520 return sprintf(data, "%d\n", mci->ue_noinfo_count);
523 static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data)
525 return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
528 static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
530 return sprintf(data, "%s\n", mci->ctl_name);
533 static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data)
535 int total_pages, csrow_idx;
537 for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows;
539 struct csrow_info *csrow = &mci->csrows[csrow_idx];
541 if (!csrow->nr_pages)
544 total_pages += csrow->nr_pages;
547 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
550 #define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
551 #define to_mcidev_attr(a) container_of(a,struct mcidev_sysfs_attribute,attr)
553 /* MCI show/store functions for top most object */
554 static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
557 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
558 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
560 debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
562 if (mcidev_attr->show)
563 return mcidev_attr->show(mem_ctl_info, buffer);
568 static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr,
569 const char *buffer, size_t count)
571 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
572 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
574 debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
576 if (mcidev_attr->store)
577 return mcidev_attr->store(mem_ctl_info, buffer, count);
582 /* Intermediate show/store table */
583 static const struct sysfs_ops mci_ops = {
585 .store = mcidev_store
588 #define MCIDEV_ATTR(_name,_mode,_show,_store) \
589 static struct mcidev_sysfs_attribute mci_attr_##_name = { \
590 .attr = {.name = __stringify(_name), .mode = _mode }, \
595 /* default Control file */
596 MCIDEV_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
598 /* default Attribute files */
599 MCIDEV_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
600 MCIDEV_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
601 MCIDEV_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
602 MCIDEV_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
603 MCIDEV_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
604 MCIDEV_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
605 MCIDEV_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
607 /* memory scrubber attribute file */
608 MCIDEV_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show,
609 mci_sdram_scrub_rate_store);
611 static struct mcidev_sysfs_attribute *mci_attr[] = {
612 &mci_attr_reset_counters,
615 &mci_attr_seconds_since_reset,
616 &mci_attr_ue_noinfo_count,
617 &mci_attr_ce_noinfo_count,
620 &mci_attr_sdram_scrub_rate,
626 * Release of a MC controlling instance
628 * each MC control instance has the following resources upon entry:
629 * a) a ref count on the top memctl kobj
630 * b) a ref count on this module
632 * this function must decrement those ref counts and then
633 * issue a free on the instance's memory
635 static void edac_mci_control_release(struct kobject *kobj)
637 struct mem_ctl_info *mci;
641 debugf0("%s() mci instance idx=%d releasing\n", __func__, mci->mc_idx);
643 /* decrement the module ref count */
644 module_put(mci->owner);
646 /* free the mci instance memory here */
650 static struct kobj_type ktype_mci = {
651 .release = edac_mci_control_release,
652 .sysfs_ops = &mci_ops,
653 .default_attrs = (struct attribute **)mci_attr,
656 /* EDAC memory controller sysfs kset:
657 * /sys/devices/system/edac/mc
659 static struct kset *mc_kset;
662 * edac_mc_register_sysfs_main_kobj
664 * setups and registers the main kobject for each mci
666 int edac_mc_register_sysfs_main_kobj(struct mem_ctl_info *mci)
668 struct kobject *kobj_mci;
671 debugf1("%s()\n", __func__);
673 kobj_mci = &mci->edac_mci_kobj;
675 /* Init the mci's kobject */
676 memset(kobj_mci, 0, sizeof(*kobj_mci));
678 /* Record which module 'owns' this control structure
679 * and bump the ref count of the module
681 mci->owner = THIS_MODULE;
683 /* bump ref count on this module */
684 if (!try_module_get(mci->owner)) {
689 /* this instance become part of the mc_kset */
690 kobj_mci->kset = mc_kset;
692 /* register the mc<id> kobject to the mc_kset */
693 err = kobject_init_and_add(kobj_mci, &ktype_mci, NULL,
694 "mc%d", mci->mc_idx);
696 debugf1("%s()Failed to register '.../edac/mc%d'\n",
697 __func__, mci->mc_idx);
700 kobject_uevent(kobj_mci, KOBJ_ADD);
702 /* At this point, to 'free' the control struct,
703 * edac_mc_unregister_sysfs_main_kobj() must be used
706 debugf1("%s() Registered '.../edac/mc%d' kobject\n",
707 __func__, mci->mc_idx);
711 /* Error exit stack */
714 module_put(mci->owner);
721 * edac_mc_register_sysfs_main_kobj
723 * tears down and the main mci kobject from the mc_kset
725 void edac_mc_unregister_sysfs_main_kobj(struct mem_ctl_info *mci)
727 /* delete the kobj from the mc_kset */
728 kobject_put(&mci->edac_mci_kobj);
731 #define EDAC_DEVICE_SYMLINK "device"
733 #define grp_to_mci(k) (container_of(k, struct mcidev_sysfs_group_kobj, kobj)->mci)
735 /* MCI show/store functions for top most object */
736 static ssize_t inst_grp_show(struct kobject *kobj, struct attribute *attr,
739 struct mem_ctl_info *mem_ctl_info = grp_to_mci(kobj);
740 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
742 debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
744 if (mcidev_attr->show)
745 return mcidev_attr->show(mem_ctl_info, buffer);
750 static ssize_t inst_grp_store(struct kobject *kobj, struct attribute *attr,
751 const char *buffer, size_t count)
753 struct mem_ctl_info *mem_ctl_info = grp_to_mci(kobj);
754 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
756 debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
758 if (mcidev_attr->store)
759 return mcidev_attr->store(mem_ctl_info, buffer, count);
764 /* No memory to release for this kobj */
765 static void edac_inst_grp_release(struct kobject *kobj)
767 struct mcidev_sysfs_group_kobj *grp;
768 struct mem_ctl_info *mci;
770 debugf1("%s()\n", __func__);
772 grp = container_of(kobj, struct mcidev_sysfs_group_kobj, kobj);
775 kobject_put(&mci->edac_mci_kobj);
778 /* Intermediate show/store table */
779 static struct sysfs_ops inst_grp_ops = {
780 .show = inst_grp_show,
781 .store = inst_grp_store
784 /* the kobj_type instance for a instance group */
785 static struct kobj_type ktype_inst_grp = {
786 .release = edac_inst_grp_release,
787 .sysfs_ops = &inst_grp_ops,
792 * edac_create_mci_instance_attributes
793 * create MC driver specific attributes bellow an specified kobj
794 * This routine calls itself recursively, in order to create an entire
797 static int edac_create_mci_instance_attributes(struct mem_ctl_info *mci,
798 struct mcidev_sysfs_attribute *sysfs_attrib,
799 struct kobject *kobj)
803 debugf1("%s()\n", __func__);
805 while (sysfs_attrib) {
806 if (sysfs_attrib->grp) {
807 struct mcidev_sysfs_group_kobj *grp_kobj;
809 grp_kobj = kzalloc(sizeof(*grp_kobj), GFP_KERNEL);
813 list_add_tail(&grp_kobj->list, &mci->grp_kobj_list);
815 grp_kobj->grp = sysfs_attrib->grp;
818 debugf0("%s() grp %s, mci %p\n", __func__,
819 sysfs_attrib->grp->name, mci);
821 err = kobject_init_and_add(&grp_kobj->kobj,
824 sysfs_attrib->grp->name);
828 err = edac_create_mci_instance_attributes(mci,
829 grp_kobj->grp->mcidev_attr,
834 } else if (sysfs_attrib->attr.name) {
835 debugf0("%s() file %s\n", __func__,
836 sysfs_attrib->attr.name);
838 err = sysfs_create_file(kobj, &sysfs_attrib->attr);
852 * edac_remove_mci_instance_attributes
853 * remove MC driver specific attributes at the topmost level
854 * directory of this mci instance.
856 static void edac_remove_mci_instance_attributes(struct mem_ctl_info *mci,
857 struct mcidev_sysfs_attribute *sysfs_attrib,
858 struct kobject *kobj, int count)
860 struct mcidev_sysfs_group_kobj *grp_kobj, *tmp;
862 debugf1("%s()\n", __func__);
865 * loop if there are attributes and until we hit a NULL entry
866 * Remove first all the atributes
868 while (sysfs_attrib) {
869 if (sysfs_attrib->grp) {
870 list_for_each_entry(grp_kobj, &mci->grp_kobj_list,
872 if (grp_kobj->grp == sysfs_attrib->grp)
873 edac_remove_mci_instance_attributes(mci,
874 grp_kobj->grp->mcidev_attr,
875 &grp_kobj->kobj, count + 1);
876 } else if (sysfs_attrib->attr.name) {
877 debugf0("%s() file %s\n", __func__,
878 sysfs_attrib->attr.name);
879 sysfs_remove_file(kobj, &sysfs_attrib->attr);
886 * Now that all attributes got removed, it is save to remove all groups
889 list_for_each_entry_safe(grp_kobj, tmp, &mci->grp_kobj_list,
891 debugf0("%s() grp %s\n", __func__, grp_kobj->grp->name);
892 kobject_put(&grp_kobj->kobj);
898 * Create a new Memory Controller kobject instance,
899 * mc<id> under the 'mc' directory
905 int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
909 struct csrow_info *csrow;
910 struct kobject *kobj_mci = &mci->edac_mci_kobj;
912 debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
914 INIT_LIST_HEAD(&mci->grp_kobj_list);
916 /* create a symlink for the device */
917 err = sysfs_create_link(kobj_mci, &mci->dev->kobj,
918 EDAC_DEVICE_SYMLINK);
920 debugf1("%s() failure to create symlink\n", __func__);
924 /* If the low level driver desires some attributes,
925 * then create them now for the driver.
927 if (mci->mc_driver_sysfs_attributes) {
928 err = edac_create_mci_instance_attributes(mci,
929 mci->mc_driver_sysfs_attributes,
930 &mci->edac_mci_kobj);
932 debugf1("%s() failure to create mci attributes\n",
938 /* Make directories for each CSROW object under the mc<id> kobject
940 for (i = 0; i < mci->nr_csrows; i++) {
941 csrow = &mci->csrows[i];
943 /* Only expose populated CSROWs */
944 if (csrow->nr_pages > 0) {
945 err = edac_create_csrow_object(mci, csrow, i);
947 debugf1("%s() failure: create csrow %d obj\n",
956 /* CSROW error: backout what has already been registered, */
958 for (i--; i >= 0; i--) {
959 if (csrow->nr_pages > 0) {
960 kobject_put(&mci->csrows[i].kobj);
964 /* remove the mci instance's attributes, if any */
965 edac_remove_mci_instance_attributes(mci,
966 mci->mc_driver_sysfs_attributes, &mci->edac_mci_kobj, 0);
968 /* remove the symlink */
969 sysfs_remove_link(kobj_mci, EDAC_DEVICE_SYMLINK);
976 * remove a Memory Controller instance
978 void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
982 debugf0("%s()\n", __func__);
984 /* remove all csrow kobjects */
985 for (i = 0; i < mci->nr_csrows; i++) {
986 if (mci->csrows[i].nr_pages > 0) {
987 debugf0("%s() unreg csrow-%d\n", __func__, i);
988 kobject_put(&mci->csrows[i].kobj);
992 debugf0("%s() remove_link\n", __func__);
994 /* remove the symlink */
995 sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
997 debugf0("%s() remove_mci_instance\n", __func__);
999 /* remove this mci instance's attribtes */
1000 edac_remove_mci_instance_attributes(mci,
1001 mci->mc_driver_sysfs_attributes,
1002 &mci->edac_mci_kobj, 0);
1003 debugf0("%s() unregister this mci kobj\n", __func__);
1005 /* unregister this instance's kobject */
1006 kobject_put(&mci->edac_mci_kobj);
1013 * edac_setup_sysfs_mc_kset(void)
1015 * Initialize the mc_kset for the 'mc' entry
1016 * This requires creating the top 'mc' directory with a kset
1017 * and its controls/attributes.
1019 * To this 'mc' kset, instance 'mci' will be grouped as children.
1022 * !0 FAILURE error code
1024 int edac_sysfs_setup_mc_kset(void)
1027 struct sysdev_class *edac_class;
1029 debugf1("%s()\n", __func__);
1031 /* get the /sys/devices/system/edac class reference */
1032 edac_class = edac_get_edac_class();
1033 if (edac_class == NULL) {
1034 debugf1("%s() no edac_class error=%d\n", __func__, err);
1038 /* Init the MC's kobject */
1039 mc_kset = kset_create_and_add("mc", NULL, &edac_class->kset.kobj);
1042 debugf1("%s() Failed to register '.../edac/mc'\n", __func__);
1046 debugf1("%s() Registered '.../edac/mc' kobject\n", __func__);
1051 /* error unwind stack */
1057 * edac_sysfs_teardown_mc_kset
1059 * deconstruct the mc_ket for memory controllers
1061 void edac_sysfs_teardown_mc_kset(void)
1063 kset_unregister(mc_kset);