rmap: resurrect page_address_in_vma anon_vma check
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / edac / edac_mc_sysfs.c
blob8aad94d10c0cced51d10746f22b5086068c48d74
1 /*
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)
50 long l;
51 int ret;
53 if (!val)
54 return -EINVAL;
56 ret = strict_strtol(val, 0, &l);
57 if (ret == -EINVAL || ((int)l != l))
58 return -EINVAL;
59 *((int *)kp->arg) = l;
61 /* notify edac_mc engine to reset the poll period */
62 edac_mc_reset_delay_period(l);
64 return 0;
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",
87 [MEM_FPM] = "FPM",
88 [MEM_EDO] = "EDO",
89 [MEM_BEDO] = "BEDO",
90 [MEM_SDR] = "Unbuffered-SDR",
91 [MEM_RDR] = "Registered-SDR",
92 [MEM_DDR] = "Unbuffered-DDR",
93 [MEM_RDDR] = "Registered-DDR",
94 [MEM_RMBS] = "RMBS",
95 [MEM_DDR2] = "Unbuffered-DDR2",
96 [MEM_FB_DDR2] = "FullyBuffered-DDR2",
97 [MEM_RDDR2] = "Registered-DDR2",
98 [MEM_XDR] = "XDR",
99 [MEM_DDR3] = "Unbuffered-DDR3",
100 [MEM_RDDR3] = "Registered-DDR3"
103 static const char *dev_types[] = {
104 [DEV_UNKNOWN] = "Unknown",
105 [DEV_X1] = "x1",
106 [DEV_X2] = "x2",
107 [DEV_X4] = "x4",
108 [DEV_X8] = "x8",
109 [DEV_X16] = "x16",
110 [DEV_X32] = "x32",
111 [DEV_X64] = "x64"
114 static const char *edac_caps[] = {
115 [EDAC_UNKNOWN] = "Unknown",
116 [EDAC_NONE] = "None",
117 [EDAC_RESERVED] = "Reserved",
118 [EDAC_PARITY] = "PARITY",
119 [EDAC_EC] = "EC",
120 [EDAC_SECDED] = "SECDED",
121 [EDAC_S2ECD2ED] = "S2ECD2ED",
122 [EDAC_S4ECD4ED] = "S4ECD4ED",
123 [EDAC_S8ECD8ED] = "S8ECD8ED",
124 [EDAC_S16ECD16ED] = "S16ECD16ED"
127 /* EDAC sysfs CSROW data structures and methods
130 /* Set of more default csrow<id> attribute show/store functions */
131 static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data,
132 int private)
134 return sprintf(data, "%u\n", csrow->ue_count);
137 static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data,
138 int private)
140 return sprintf(data, "%u\n", csrow->ce_count);
143 static ssize_t csrow_size_show(struct csrow_info *csrow, char *data,
144 int private)
146 return sprintf(data, "%u\n", PAGES_TO_MiB(csrow->nr_pages));
149 static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data,
150 int private)
152 return sprintf(data, "%s\n", mem_types[csrow->mtype]);
155 static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data,
156 int private)
158 return sprintf(data, "%s\n", dev_types[csrow->dtype]);
161 static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data,
162 int private)
164 return sprintf(data, "%s\n", edac_caps[csrow->edac_mode]);
167 /* show/store functions for DIMM Label attributes */
168 static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
169 char *data, int channel)
171 /* if field has not been initialized, there is nothing to send */
172 if (!csrow->channels[channel].label[0])
173 return 0;
175 return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n",
176 csrow->channels[channel].label);
179 static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
180 const char *data,
181 size_t count, int channel)
183 ssize_t max_size = 0;
185 max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
186 strncpy(csrow->channels[channel].label, data, max_size);
187 csrow->channels[channel].label[max_size] = '\0';
189 return max_size;
192 /* show function for dynamic chX_ce_count attribute */
193 static ssize_t channel_ce_count_show(struct csrow_info *csrow,
194 char *data, int channel)
196 return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
199 /* csrow specific attribute structure */
200 struct csrowdev_attribute {
201 struct attribute attr;
202 ssize_t(*show) (struct csrow_info *, char *, int);
203 ssize_t(*store) (struct csrow_info *, const char *, size_t, int);
204 int private;
207 #define to_csrow(k) container_of(k, struct csrow_info, kobj)
208 #define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
210 /* Set of show/store higher level functions for default csrow attributes */
211 static ssize_t csrowdev_show(struct kobject *kobj,
212 struct attribute *attr, char *buffer)
214 struct csrow_info *csrow = to_csrow(kobj);
215 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
217 if (csrowdev_attr->show)
218 return csrowdev_attr->show(csrow,
219 buffer, csrowdev_attr->private);
220 return -EIO;
223 static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
224 const char *buffer, size_t count)
226 struct csrow_info *csrow = to_csrow(kobj);
227 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
229 if (csrowdev_attr->store)
230 return csrowdev_attr->store(csrow,
231 buffer,
232 count, csrowdev_attr->private);
233 return -EIO;
236 static const struct sysfs_ops csrowfs_ops = {
237 .show = csrowdev_show,
238 .store = csrowdev_store
241 #define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \
242 static struct csrowdev_attribute attr_##_name = { \
243 .attr = {.name = __stringify(_name), .mode = _mode }, \
244 .show = _show, \
245 .store = _store, \
246 .private = _private, \
249 /* default cwrow<id>/attribute files */
250 CSROWDEV_ATTR(size_mb, S_IRUGO, csrow_size_show, NULL, 0);
251 CSROWDEV_ATTR(dev_type, S_IRUGO, csrow_dev_type_show, NULL, 0);
252 CSROWDEV_ATTR(mem_type, S_IRUGO, csrow_mem_type_show, NULL, 0);
253 CSROWDEV_ATTR(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL, 0);
254 CSROWDEV_ATTR(ue_count, S_IRUGO, csrow_ue_count_show, NULL, 0);
255 CSROWDEV_ATTR(ce_count, S_IRUGO, csrow_ce_count_show, NULL, 0);
257 /* default attributes of the CSROW<id> object */
258 static struct csrowdev_attribute *default_csrow_attr[] = {
259 &attr_dev_type,
260 &attr_mem_type,
261 &attr_edac_mode,
262 &attr_size_mb,
263 &attr_ue_count,
264 &attr_ce_count,
265 NULL,
268 /* possible dynamic channel DIMM Label attribute files */
269 CSROWDEV_ATTR(ch0_dimm_label, S_IRUGO | S_IWUSR,
270 channel_dimm_label_show, channel_dimm_label_store, 0);
271 CSROWDEV_ATTR(ch1_dimm_label, S_IRUGO | S_IWUSR,
272 channel_dimm_label_show, channel_dimm_label_store, 1);
273 CSROWDEV_ATTR(ch2_dimm_label, S_IRUGO | S_IWUSR,
274 channel_dimm_label_show, channel_dimm_label_store, 2);
275 CSROWDEV_ATTR(ch3_dimm_label, S_IRUGO | S_IWUSR,
276 channel_dimm_label_show, channel_dimm_label_store, 3);
277 CSROWDEV_ATTR(ch4_dimm_label, S_IRUGO | S_IWUSR,
278 channel_dimm_label_show, channel_dimm_label_store, 4);
279 CSROWDEV_ATTR(ch5_dimm_label, S_IRUGO | S_IWUSR,
280 channel_dimm_label_show, channel_dimm_label_store, 5);
282 /* Total possible dynamic DIMM Label attribute file table */
283 static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
284 &attr_ch0_dimm_label,
285 &attr_ch1_dimm_label,
286 &attr_ch2_dimm_label,
287 &attr_ch3_dimm_label,
288 &attr_ch4_dimm_label,
289 &attr_ch5_dimm_label
292 /* possible dynamic channel ce_count attribute files */
293 CSROWDEV_ATTR(ch0_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 0);
294 CSROWDEV_ATTR(ch1_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 1);
295 CSROWDEV_ATTR(ch2_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 2);
296 CSROWDEV_ATTR(ch3_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 3);
297 CSROWDEV_ATTR(ch4_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 4);
298 CSROWDEV_ATTR(ch5_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 5);
300 /* Total possible dynamic ce_count attribute file table */
301 static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
302 &attr_ch0_ce_count,
303 &attr_ch1_ce_count,
304 &attr_ch2_ce_count,
305 &attr_ch3_ce_count,
306 &attr_ch4_ce_count,
307 &attr_ch5_ce_count
310 #define EDAC_NR_CHANNELS 6
312 /* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */
313 static int edac_create_channel_files(struct kobject *kobj, int chan)
315 int err = -ENODEV;
317 if (chan >= EDAC_NR_CHANNELS)
318 return err;
320 /* create the DIMM label attribute file */
321 err = sysfs_create_file(kobj,
322 (struct attribute *)
323 dynamic_csrow_dimm_attr[chan]);
325 if (!err) {
326 /* create the CE Count attribute file */
327 err = sysfs_create_file(kobj,
328 (struct attribute *)
329 dynamic_csrow_ce_count_attr[chan]);
330 } else {
331 debugf1("%s() dimm labels and ce_count files created",
332 __func__);
335 return err;
338 /* No memory to release for this kobj */
339 static void edac_csrow_instance_release(struct kobject *kobj)
341 struct mem_ctl_info *mci;
342 struct csrow_info *cs;
344 debugf1("%s()\n", __func__);
346 cs = container_of(kobj, struct csrow_info, kobj);
347 mci = cs->mci;
349 kobject_put(&mci->edac_mci_kobj);
352 /* the kobj_type instance for a CSROW */
353 static struct kobj_type ktype_csrow = {
354 .release = edac_csrow_instance_release,
355 .sysfs_ops = &csrowfs_ops,
356 .default_attrs = (struct attribute **)default_csrow_attr,
359 /* Create a CSROW object under specifed edac_mc_device */
360 static int edac_create_csrow_object(struct mem_ctl_info *mci,
361 struct csrow_info *csrow, int index)
363 struct kobject *kobj_mci = &mci->edac_mci_kobj;
364 struct kobject *kobj;
365 int chan;
366 int err;
368 /* generate ..../edac/mc/mc<id>/csrow<index> */
369 memset(&csrow->kobj, 0, sizeof(csrow->kobj));
370 csrow->mci = mci; /* include container up link */
372 /* bump the mci instance's kobject's ref count */
373 kobj = kobject_get(&mci->edac_mci_kobj);
374 if (!kobj) {
375 err = -ENODEV;
376 goto err_out;
379 /* Instanstiate the csrow object */
380 err = kobject_init_and_add(&csrow->kobj, &ktype_csrow, kobj_mci,
381 "csrow%d", index);
382 if (err)
383 goto err_release_top_kobj;
385 /* At this point, to release a csrow kobj, one must
386 * call the kobject_put and allow that tear down
387 * to work the releasing
390 /* Create the dyanmic attribute files on this csrow,
391 * namely, the DIMM labels and the channel ce_count
393 for (chan = 0; chan < csrow->nr_channels; chan++) {
394 err = edac_create_channel_files(&csrow->kobj, chan);
395 if (err) {
396 /* special case the unregister here */
397 kobject_put(&csrow->kobj);
398 goto err_out;
401 kobject_uevent(&csrow->kobj, KOBJ_ADD);
402 return 0;
404 /* error unwind stack */
405 err_release_top_kobj:
406 kobject_put(&mci->edac_mci_kobj);
408 err_out:
409 return err;
412 /* default sysfs methods and data structures for the main MCI kobject */
414 static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
415 const char *data, size_t count)
417 int row, chan;
419 mci->ue_noinfo_count = 0;
420 mci->ce_noinfo_count = 0;
421 mci->ue_count = 0;
422 mci->ce_count = 0;
424 for (row = 0; row < mci->nr_csrows; row++) {
425 struct csrow_info *ri = &mci->csrows[row];
427 ri->ue_count = 0;
428 ri->ce_count = 0;
430 for (chan = 0; chan < ri->nr_channels; chan++)
431 ri->channels[chan].ce_count = 0;
434 mci->start_time = jiffies;
435 return count;
438 /* memory scrubbing */
439 static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci,
440 const char *data, size_t count)
442 unsigned long bandwidth = 0;
443 int err;
445 if (!mci->set_sdram_scrub_rate) {
446 edac_printk(KERN_WARNING, EDAC_MC,
447 "Memory scrub rate setting not implemented!\n");
448 return -EINVAL;
451 if (strict_strtoul(data, 10, &bandwidth) < 0)
452 return -EINVAL;
454 err = mci->set_sdram_scrub_rate(mci, (u32)bandwidth);
455 if (err) {
456 edac_printk(KERN_DEBUG, EDAC_MC,
457 "Failed setting scrub rate to %lu\n", bandwidth);
458 return -EINVAL;
460 else {
461 edac_printk(KERN_DEBUG, EDAC_MC,
462 "Scrub rate set to: %lu\n", bandwidth);
463 return count;
467 static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data)
469 u32 bandwidth = 0;
470 int err;
472 if (!mci->get_sdram_scrub_rate) {
473 edac_printk(KERN_WARNING, EDAC_MC,
474 "Memory scrub rate reading not implemented\n");
475 return -EINVAL;
478 err = mci->get_sdram_scrub_rate(mci, &bandwidth);
479 if (err) {
480 edac_printk(KERN_DEBUG, EDAC_MC, "Error reading scrub rate\n");
481 return err;
483 else {
484 edac_printk(KERN_DEBUG, EDAC_MC,
485 "Read scrub rate: %d\n", bandwidth);
486 return sprintf(data, "%d\n", bandwidth);
490 /* default attribute files for the MCI object */
491 static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
493 return sprintf(data, "%d\n", mci->ue_count);
496 static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
498 return sprintf(data, "%d\n", mci->ce_count);
501 static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
503 return sprintf(data, "%d\n", mci->ce_noinfo_count);
506 static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
508 return sprintf(data, "%d\n", mci->ue_noinfo_count);
511 static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data)
513 return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
516 static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
518 return sprintf(data, "%s\n", mci->ctl_name);
521 static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data)
523 int total_pages, csrow_idx;
525 for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows;
526 csrow_idx++) {
527 struct csrow_info *csrow = &mci->csrows[csrow_idx];
529 if (!csrow->nr_pages)
530 continue;
532 total_pages += csrow->nr_pages;
535 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
538 #define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
539 #define to_mcidev_attr(a) container_of(a,struct mcidev_sysfs_attribute,attr)
541 /* MCI show/store functions for top most object */
542 static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
543 char *buffer)
545 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
546 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
548 debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
550 if (mcidev_attr->show)
551 return mcidev_attr->show(mem_ctl_info, buffer);
553 return -EIO;
556 static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr,
557 const char *buffer, size_t count)
559 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
560 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
562 debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
564 if (mcidev_attr->store)
565 return mcidev_attr->store(mem_ctl_info, buffer, count);
567 return -EIO;
570 /* Intermediate show/store table */
571 static const struct sysfs_ops mci_ops = {
572 .show = mcidev_show,
573 .store = mcidev_store
576 #define MCIDEV_ATTR(_name,_mode,_show,_store) \
577 static struct mcidev_sysfs_attribute mci_attr_##_name = { \
578 .attr = {.name = __stringify(_name), .mode = _mode }, \
579 .show = _show, \
580 .store = _store, \
583 /* default Control file */
584 MCIDEV_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
586 /* default Attribute files */
587 MCIDEV_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
588 MCIDEV_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
589 MCIDEV_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
590 MCIDEV_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
591 MCIDEV_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
592 MCIDEV_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
593 MCIDEV_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
595 /* memory scrubber attribute file */
596 MCIDEV_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show,
597 mci_sdram_scrub_rate_store);
599 static struct mcidev_sysfs_attribute *mci_attr[] = {
600 &mci_attr_reset_counters,
601 &mci_attr_mc_name,
602 &mci_attr_size_mb,
603 &mci_attr_seconds_since_reset,
604 &mci_attr_ue_noinfo_count,
605 &mci_attr_ce_noinfo_count,
606 &mci_attr_ue_count,
607 &mci_attr_ce_count,
608 &mci_attr_sdram_scrub_rate,
609 NULL
614 * Release of a MC controlling instance
616 * each MC control instance has the following resources upon entry:
617 * a) a ref count on the top memctl kobj
618 * b) a ref count on this module
620 * this function must decrement those ref counts and then
621 * issue a free on the instance's memory
623 static void edac_mci_control_release(struct kobject *kobj)
625 struct mem_ctl_info *mci;
627 mci = to_mci(kobj);
629 debugf0("%s() mci instance idx=%d releasing\n", __func__, mci->mc_idx);
631 /* decrement the module ref count */
632 module_put(mci->owner);
634 /* free the mci instance memory here */
635 kfree(mci);
638 static struct kobj_type ktype_mci = {
639 .release = edac_mci_control_release,
640 .sysfs_ops = &mci_ops,
641 .default_attrs = (struct attribute **)mci_attr,
644 /* EDAC memory controller sysfs kset:
645 * /sys/devices/system/edac/mc
647 static struct kset *mc_kset;
650 * edac_mc_register_sysfs_main_kobj
652 * setups and registers the main kobject for each mci
654 int edac_mc_register_sysfs_main_kobj(struct mem_ctl_info *mci)
656 struct kobject *kobj_mci;
657 int err;
659 debugf1("%s()\n", __func__);
661 kobj_mci = &mci->edac_mci_kobj;
663 /* Init the mci's kobject */
664 memset(kobj_mci, 0, sizeof(*kobj_mci));
666 /* Record which module 'owns' this control structure
667 * and bump the ref count of the module
669 mci->owner = THIS_MODULE;
671 /* bump ref count on this module */
672 if (!try_module_get(mci->owner)) {
673 err = -ENODEV;
674 goto fail_out;
677 /* this instance become part of the mc_kset */
678 kobj_mci->kset = mc_kset;
680 /* register the mc<id> kobject to the mc_kset */
681 err = kobject_init_and_add(kobj_mci, &ktype_mci, NULL,
682 "mc%d", mci->mc_idx);
683 if (err) {
684 debugf1("%s()Failed to register '.../edac/mc%d'\n",
685 __func__, mci->mc_idx);
686 goto kobj_reg_fail;
688 kobject_uevent(kobj_mci, KOBJ_ADD);
690 /* At this point, to 'free' the control struct,
691 * edac_mc_unregister_sysfs_main_kobj() must be used
694 debugf1("%s() Registered '.../edac/mc%d' kobject\n",
695 __func__, mci->mc_idx);
697 return 0;
699 /* Error exit stack */
701 kobj_reg_fail:
702 module_put(mci->owner);
704 fail_out:
705 return err;
709 * edac_mc_register_sysfs_main_kobj
711 * tears down and the main mci kobject from the mc_kset
713 void edac_mc_unregister_sysfs_main_kobj(struct mem_ctl_info *mci)
715 /* delete the kobj from the mc_kset */
716 kobject_put(&mci->edac_mci_kobj);
719 #define EDAC_DEVICE_SYMLINK "device"
721 #define grp_to_mci(k) (container_of(k, struct mcidev_sysfs_group_kobj, kobj)->mci)
723 /* MCI show/store functions for top most object */
724 static ssize_t inst_grp_show(struct kobject *kobj, struct attribute *attr,
725 char *buffer)
727 struct mem_ctl_info *mem_ctl_info = grp_to_mci(kobj);
728 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
730 debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
732 if (mcidev_attr->show)
733 return mcidev_attr->show(mem_ctl_info, buffer);
735 return -EIO;
738 static ssize_t inst_grp_store(struct kobject *kobj, struct attribute *attr,
739 const char *buffer, size_t count)
741 struct mem_ctl_info *mem_ctl_info = grp_to_mci(kobj);
742 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
744 debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
746 if (mcidev_attr->store)
747 return mcidev_attr->store(mem_ctl_info, buffer, count);
749 return -EIO;
752 /* No memory to release for this kobj */
753 static void edac_inst_grp_release(struct kobject *kobj)
755 struct mcidev_sysfs_group_kobj *grp;
756 struct mem_ctl_info *mci;
758 debugf1("%s()\n", __func__);
760 grp = container_of(kobj, struct mcidev_sysfs_group_kobj, kobj);
761 mci = grp->mci;
763 kobject_put(&mci->edac_mci_kobj);
766 /* Intermediate show/store table */
767 static struct sysfs_ops inst_grp_ops = {
768 .show = inst_grp_show,
769 .store = inst_grp_store
772 /* the kobj_type instance for a instance group */
773 static struct kobj_type ktype_inst_grp = {
774 .release = edac_inst_grp_release,
775 .sysfs_ops = &inst_grp_ops,
780 * edac_create_mci_instance_attributes
781 * create MC driver specific attributes bellow an specified kobj
782 * This routine calls itself recursively, in order to create an entire
783 * object tree.
785 static int edac_create_mci_instance_attributes(struct mem_ctl_info *mci,
786 struct mcidev_sysfs_attribute *sysfs_attrib,
787 struct kobject *kobj)
789 int err;
791 debugf1("%s()\n", __func__);
793 while (sysfs_attrib) {
794 if (sysfs_attrib->grp) {
795 struct mcidev_sysfs_group_kobj *grp_kobj;
797 grp_kobj = kzalloc(sizeof(*grp_kobj), GFP_KERNEL);
798 if (!grp_kobj)
799 return -ENOMEM;
801 list_add_tail(&grp_kobj->list, &mci->grp_kobj_list);
803 grp_kobj->grp = sysfs_attrib->grp;
804 grp_kobj->mci = mci;
806 debugf0("%s() grp %s, mci %p\n", __func__,
807 sysfs_attrib->grp->name, mci);
809 err = kobject_init_and_add(&grp_kobj->kobj,
810 &ktype_inst_grp,
811 &mci->edac_mci_kobj,
812 sysfs_attrib->grp->name);
813 if (err)
814 return err;
816 err = edac_create_mci_instance_attributes(mci,
817 grp_kobj->grp->mcidev_attr,
818 &grp_kobj->kobj);
820 if (err)
821 return err;
822 } else if (sysfs_attrib->attr.name) {
823 debugf0("%s() file %s\n", __func__,
824 sysfs_attrib->attr.name);
826 err = sysfs_create_file(kobj, &sysfs_attrib->attr);
827 } else
828 break;
830 if (err) {
831 return err;
833 sysfs_attrib++;
836 return 0;
840 * edac_remove_mci_instance_attributes
841 * remove MC driver specific attributes at the topmost level
842 * directory of this mci instance.
844 static void edac_remove_mci_instance_attributes(struct mem_ctl_info *mci,
845 struct mcidev_sysfs_attribute *sysfs_attrib,
846 struct kobject *kobj, int count)
848 struct mcidev_sysfs_group_kobj *grp_kobj, *tmp;
850 debugf1("%s()\n", __func__);
853 * loop if there are attributes and until we hit a NULL entry
854 * Remove first all the atributes
856 while (sysfs_attrib) {
857 if (sysfs_attrib->grp) {
858 list_for_each_entry(grp_kobj, &mci->grp_kobj_list,
859 list)
860 if (grp_kobj->grp == sysfs_attrib->grp)
861 edac_remove_mci_instance_attributes(mci,
862 grp_kobj->grp->mcidev_attr,
863 &grp_kobj->kobj, count + 1);
864 } else if (sysfs_attrib->attr.name) {
865 debugf0("%s() file %s\n", __func__,
866 sysfs_attrib->attr.name);
867 sysfs_remove_file(kobj, &sysfs_attrib->attr);
868 } else
869 break;
870 sysfs_attrib++;
874 * Now that all attributes got removed, it is save to remove all groups
876 if (!count)
877 list_for_each_entry_safe(grp_kobj, tmp, &mci->grp_kobj_list,
878 list) {
879 debugf0("%s() grp %s\n", __func__, grp_kobj->grp->name);
880 kobject_put(&grp_kobj->kobj);
886 * Create a new Memory Controller kobject instance,
887 * mc<id> under the 'mc' directory
889 * Return:
890 * 0 Success
891 * !0 Failure
893 int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
895 int i;
896 int err;
897 struct csrow_info *csrow;
898 struct kobject *kobj_mci = &mci->edac_mci_kobj;
900 debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
902 INIT_LIST_HEAD(&mci->grp_kobj_list);
904 /* create a symlink for the device */
905 err = sysfs_create_link(kobj_mci, &mci->dev->kobj,
906 EDAC_DEVICE_SYMLINK);
907 if (err) {
908 debugf1("%s() failure to create symlink\n", __func__);
909 goto fail0;
912 /* If the low level driver desires some attributes,
913 * then create them now for the driver.
915 if (mci->mc_driver_sysfs_attributes) {
916 err = edac_create_mci_instance_attributes(mci,
917 mci->mc_driver_sysfs_attributes,
918 &mci->edac_mci_kobj);
919 if (err) {
920 debugf1("%s() failure to create mci attributes\n",
921 __func__);
922 goto fail0;
926 /* Make directories for each CSROW object under the mc<id> kobject
928 for (i = 0; i < mci->nr_csrows; i++) {
929 csrow = &mci->csrows[i];
931 /* Only expose populated CSROWs */
932 if (csrow->nr_pages > 0) {
933 err = edac_create_csrow_object(mci, csrow, i);
934 if (err) {
935 debugf1("%s() failure: create csrow %d obj\n",
936 __func__, i);
937 goto fail1;
942 return 0;
944 /* CSROW error: backout what has already been registered, */
945 fail1:
946 for (i--; i >= 0; i--) {
947 if (csrow->nr_pages > 0) {
948 kobject_put(&mci->csrows[i].kobj);
952 /* remove the mci instance's attributes, if any */
953 edac_remove_mci_instance_attributes(mci,
954 mci->mc_driver_sysfs_attributes, &mci->edac_mci_kobj, 0);
956 /* remove the symlink */
957 sysfs_remove_link(kobj_mci, EDAC_DEVICE_SYMLINK);
959 fail0:
960 return err;
964 * remove a Memory Controller instance
966 void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
968 int i;
970 debugf0("%s()\n", __func__);
972 /* remove all csrow kobjects */
973 for (i = 0; i < mci->nr_csrows; i++) {
974 if (mci->csrows[i].nr_pages > 0) {
975 debugf0("%s() unreg csrow-%d\n", __func__, i);
976 kobject_put(&mci->csrows[i].kobj);
980 debugf0("%s() remove_link\n", __func__);
982 /* remove the symlink */
983 sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
985 debugf0("%s() remove_mci_instance\n", __func__);
987 /* remove this mci instance's attribtes */
988 edac_remove_mci_instance_attributes(mci,
989 mci->mc_driver_sysfs_attributes,
990 &mci->edac_mci_kobj, 0);
991 debugf0("%s() unregister this mci kobj\n", __func__);
993 /* unregister this instance's kobject */
994 kobject_put(&mci->edac_mci_kobj);
1001 * edac_setup_sysfs_mc_kset(void)
1003 * Initialize the mc_kset for the 'mc' entry
1004 * This requires creating the top 'mc' directory with a kset
1005 * and its controls/attributes.
1007 * To this 'mc' kset, instance 'mci' will be grouped as children.
1009 * Return: 0 SUCCESS
1010 * !0 FAILURE error code
1012 int edac_sysfs_setup_mc_kset(void)
1014 int err = 0;
1015 struct sysdev_class *edac_class;
1017 debugf1("%s()\n", __func__);
1019 /* get the /sys/devices/system/edac class reference */
1020 edac_class = edac_get_edac_class();
1021 if (edac_class == NULL) {
1022 debugf1("%s() no edac_class error=%d\n", __func__, err);
1023 goto fail_out;
1026 /* Init the MC's kobject */
1027 mc_kset = kset_create_and_add("mc", NULL, &edac_class->kset.kobj);
1028 if (!mc_kset) {
1029 err = -ENOMEM;
1030 debugf1("%s() Failed to register '.../edac/mc'\n", __func__);
1031 goto fail_out;
1034 debugf1("%s() Registered '.../edac/mc' kobject\n", __func__);
1036 return 0;
1039 /* error unwind stack */
1040 fail_out:
1041 return err;
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);