Kobject: convert drivers/* from kobject_unregister() to kobject_put()
[linux-2.6.git] / drivers / edac / edac_mc_sysfs.c
1 /*
2  * edac_mc kernel module
3  * (C) 2005-2007 Linux Networx (http://lnxi.com)
4  *
5  * This file may be distributed under the terms of the
6  * GNU General Public License.
7  *
8  * Written Doug Thompson <norsk5@xmission.com> www.softwarebitmaker.com
9  *
10  */
11
12 #include <linux/ctype.h>
13 #include <linux/bug.h>
14
15 #include "edac_core.h"
16 #include "edac_module.h"
17
18
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;
24
25 /* Getter functions for above */
26 int edac_mc_get_log_ue(void)
27 {
28         return edac_mc_log_ue;
29 }
30
31 int edac_mc_get_log_ce(void)
32 {
33         return edac_mc_log_ce;
34 }
35
36 int edac_mc_get_panic_on_ue(void)
37 {
38         return edac_mc_panic_on_ue;
39 }
40
41 /* this is temporary */
42 int edac_mc_get_poll_msec(void)
43 {
44         return edac_mc_poll_msec;
45 }
46
47 /* Parameter declarations for above */
48 module_param(edac_mc_panic_on_ue, int, 0644);
49 MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
50 module_param(edac_mc_log_ue, int, 0644);
51 MODULE_PARM_DESC(edac_mc_log_ue,
52                  "Log uncorrectable error to console: 0=off 1=on");
53 module_param(edac_mc_log_ce, int, 0644);
54 MODULE_PARM_DESC(edac_mc_log_ce,
55                  "Log correctable error to console: 0=off 1=on");
56 module_param(edac_mc_poll_msec, int, 0644);
57 MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
58
59 /*
60  * various constants for Memory Controllers
61  */
62 static const char *mem_types[] = {
63         [MEM_EMPTY] = "Empty",
64         [MEM_RESERVED] = "Reserved",
65         [MEM_UNKNOWN] = "Unknown",
66         [MEM_FPM] = "FPM",
67         [MEM_EDO] = "EDO",
68         [MEM_BEDO] = "BEDO",
69         [MEM_SDR] = "Unbuffered-SDR",
70         [MEM_RDR] = "Registered-SDR",
71         [MEM_DDR] = "Unbuffered-DDR",
72         [MEM_RDDR] = "Registered-DDR",
73         [MEM_RMBS] = "RMBS",
74         [MEM_DDR2] = "Unbuffered-DDR2",
75         [MEM_FB_DDR2] = "FullyBuffered-DDR2",
76         [MEM_RDDR2] = "Registered-DDR2"
77 };
78
79 static const char *dev_types[] = {
80         [DEV_UNKNOWN] = "Unknown",
81         [DEV_X1] = "x1",
82         [DEV_X2] = "x2",
83         [DEV_X4] = "x4",
84         [DEV_X8] = "x8",
85         [DEV_X16] = "x16",
86         [DEV_X32] = "x32",
87         [DEV_X64] = "x64"
88 };
89
90 static const char *edac_caps[] = {
91         [EDAC_UNKNOWN] = "Unknown",
92         [EDAC_NONE] = "None",
93         [EDAC_RESERVED] = "Reserved",
94         [EDAC_PARITY] = "PARITY",
95         [EDAC_EC] = "EC",
96         [EDAC_SECDED] = "SECDED",
97         [EDAC_S2ECD2ED] = "S2ECD2ED",
98         [EDAC_S4ECD4ED] = "S4ECD4ED",
99         [EDAC_S8ECD8ED] = "S8ECD8ED",
100         [EDAC_S16ECD16ED] = "S16ECD16ED"
101 };
102
103
104
105 /*
106  * /sys/devices/system/edac/mc;
107  *      data structures and methods
108  */
109 static ssize_t memctrl_int_show(void *ptr, char *buffer)
110 {
111         int *value = (int *)ptr;
112         return sprintf(buffer, "%u\n", *value);
113 }
114
115 static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count)
116 {
117         int *value = (int *)ptr;
118
119         if (isdigit(*buffer))
120                 *value = simple_strtoul(buffer, NULL, 0);
121
122         return count;
123 }
124
125 /*
126  * mc poll_msec time value
127  */
128 static ssize_t poll_msec_int_store(void *ptr, const char *buffer, size_t count)
129 {
130         int *value = (int *)ptr;
131
132         if (isdigit(*buffer)) {
133                 *value = simple_strtoul(buffer, NULL, 0);
134
135                 /* notify edac_mc engine to reset the poll period */
136                 edac_mc_reset_delay_period(*value);
137         }
138
139         return count;
140 }
141
142
143 /* EDAC sysfs CSROW data structures and methods
144  */
145
146 /* Set of more default csrow<id> attribute show/store functions */
147 static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data,
148                                 int private)
149 {
150         return sprintf(data, "%u\n", csrow->ue_count);
151 }
152
153 static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data,
154                                 int private)
155 {
156         return sprintf(data, "%u\n", csrow->ce_count);
157 }
158
159 static ssize_t csrow_size_show(struct csrow_info *csrow, char *data,
160                                 int private)
161 {
162         return sprintf(data, "%u\n", PAGES_TO_MiB(csrow->nr_pages));
163 }
164
165 static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data,
166                                 int private)
167 {
168         return sprintf(data, "%s\n", mem_types[csrow->mtype]);
169 }
170
171 static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data,
172                                 int private)
173 {
174         return sprintf(data, "%s\n", dev_types[csrow->dtype]);
175 }
176
177 static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data,
178                                 int private)
179 {
180         return sprintf(data, "%s\n", edac_caps[csrow->edac_mode]);
181 }
182
183 /* show/store functions for DIMM Label attributes */
184 static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
185                                 char *data, int channel)
186 {
187         return snprintf(data, EDAC_MC_LABEL_LEN, "%s",
188                         csrow->channels[channel].label);
189 }
190
191 static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
192                                         const char *data,
193                                         size_t count, int channel)
194 {
195         ssize_t max_size = 0;
196
197         max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
198         strncpy(csrow->channels[channel].label, data, max_size);
199         csrow->channels[channel].label[max_size] = '\0';
200
201         return max_size;
202 }
203
204 /* show function for dynamic chX_ce_count attribute */
205 static ssize_t channel_ce_count_show(struct csrow_info *csrow,
206                                 char *data, int channel)
207 {
208         return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
209 }
210
211 /* csrow specific attribute structure */
212 struct csrowdev_attribute {
213         struct attribute attr;
214          ssize_t(*show) (struct csrow_info *, char *, int);
215          ssize_t(*store) (struct csrow_info *, const char *, size_t, int);
216         int private;
217 };
218
219 #define to_csrow(k) container_of(k, struct csrow_info, kobj)
220 #define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
221
222 /* Set of show/store higher level functions for default csrow attributes */
223 static ssize_t csrowdev_show(struct kobject *kobj,
224                         struct attribute *attr, char *buffer)
225 {
226         struct csrow_info *csrow = to_csrow(kobj);
227         struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
228
229         if (csrowdev_attr->show)
230                 return csrowdev_attr->show(csrow,
231                                         buffer, csrowdev_attr->private);
232         return -EIO;
233 }
234
235 static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
236                         const char *buffer, size_t count)
237 {
238         struct csrow_info *csrow = to_csrow(kobj);
239         struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
240
241         if (csrowdev_attr->store)
242                 return csrowdev_attr->store(csrow,
243                                         buffer,
244                                         count, csrowdev_attr->private);
245         return -EIO;
246 }
247
248 static struct sysfs_ops csrowfs_ops = {
249         .show = csrowdev_show,
250         .store = csrowdev_store
251 };
252
253 #define CSROWDEV_ATTR(_name,_mode,_show,_store,_private)        \
254 static struct csrowdev_attribute attr_##_name = {                       \
255         .attr = {.name = __stringify(_name), .mode = _mode },   \
256         .show   = _show,                                        \
257         .store  = _store,                                       \
258         .private = _private,                                    \
259 };
260
261 /* default cwrow<id>/attribute files */
262 CSROWDEV_ATTR(size_mb, S_IRUGO, csrow_size_show, NULL, 0);
263 CSROWDEV_ATTR(dev_type, S_IRUGO, csrow_dev_type_show, NULL, 0);
264 CSROWDEV_ATTR(mem_type, S_IRUGO, csrow_mem_type_show, NULL, 0);
265 CSROWDEV_ATTR(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL, 0);
266 CSROWDEV_ATTR(ue_count, S_IRUGO, csrow_ue_count_show, NULL, 0);
267 CSROWDEV_ATTR(ce_count, S_IRUGO, csrow_ce_count_show, NULL, 0);
268
269 /* default attributes of the CSROW<id> object */
270 static struct csrowdev_attribute *default_csrow_attr[] = {
271         &attr_dev_type,
272         &attr_mem_type,
273         &attr_edac_mode,
274         &attr_size_mb,
275         &attr_ue_count,
276         &attr_ce_count,
277         NULL,
278 };
279
280 /* possible dynamic channel DIMM Label attribute files */
281 CSROWDEV_ATTR(ch0_dimm_label, S_IRUGO | S_IWUSR,
282         channel_dimm_label_show, channel_dimm_label_store, 0);
283 CSROWDEV_ATTR(ch1_dimm_label, S_IRUGO | S_IWUSR,
284         channel_dimm_label_show, channel_dimm_label_store, 1);
285 CSROWDEV_ATTR(ch2_dimm_label, S_IRUGO | S_IWUSR,
286         channel_dimm_label_show, channel_dimm_label_store, 2);
287 CSROWDEV_ATTR(ch3_dimm_label, S_IRUGO | S_IWUSR,
288         channel_dimm_label_show, channel_dimm_label_store, 3);
289 CSROWDEV_ATTR(ch4_dimm_label, S_IRUGO | S_IWUSR,
290         channel_dimm_label_show, channel_dimm_label_store, 4);
291 CSROWDEV_ATTR(ch5_dimm_label, S_IRUGO | S_IWUSR,
292         channel_dimm_label_show, channel_dimm_label_store, 5);
293
294 /* Total possible dynamic DIMM Label attribute file table */
295 static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
296         &attr_ch0_dimm_label,
297         &attr_ch1_dimm_label,
298         &attr_ch2_dimm_label,
299         &attr_ch3_dimm_label,
300         &attr_ch4_dimm_label,
301         &attr_ch5_dimm_label
302 };
303
304 /* possible dynamic channel ce_count attribute files */
305 CSROWDEV_ATTR(ch0_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 0);
306 CSROWDEV_ATTR(ch1_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 1);
307 CSROWDEV_ATTR(ch2_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 2);
308 CSROWDEV_ATTR(ch3_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 3);
309 CSROWDEV_ATTR(ch4_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 4);
310 CSROWDEV_ATTR(ch5_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 5);
311
312 /* Total possible dynamic ce_count attribute file table */
313 static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
314         &attr_ch0_ce_count,
315         &attr_ch1_ce_count,
316         &attr_ch2_ce_count,
317         &attr_ch3_ce_count,
318         &attr_ch4_ce_count,
319         &attr_ch5_ce_count
320 };
321
322 #define EDAC_NR_CHANNELS        6
323
324 /* Create dynamic CHANNEL files, indexed by 'chan',  under specifed CSROW */
325 static int edac_create_channel_files(struct kobject *kobj, int chan)
326 {
327         int err = -ENODEV;
328
329         if (chan >= EDAC_NR_CHANNELS)
330                 return err;
331
332         /* create the DIMM label attribute file */
333         err = sysfs_create_file(kobj,
334                                 (struct attribute *)
335                                 dynamic_csrow_dimm_attr[chan]);
336
337         if (!err) {
338                 /* create the CE Count attribute file */
339                 err = sysfs_create_file(kobj,
340                                         (struct attribute *)
341                                         dynamic_csrow_ce_count_attr[chan]);
342         } else {
343                 debugf1("%s()  dimm labels and ce_count files created",
344                         __func__);
345         }
346
347         return err;
348 }
349
350 /* No memory to release for this kobj */
351 static void edac_csrow_instance_release(struct kobject *kobj)
352 {
353         struct mem_ctl_info *mci;
354         struct csrow_info *cs;
355
356         debugf1("%s()\n", __func__);
357
358         cs = container_of(kobj, struct csrow_info, kobj);
359         mci = cs->mci;
360
361         kobject_put(&mci->edac_mci_kobj);
362 }
363
364 /* the kobj_type instance for a CSROW */
365 static struct kobj_type ktype_csrow = {
366         .release = edac_csrow_instance_release,
367         .sysfs_ops = &csrowfs_ops,
368         .default_attrs = (struct attribute **)default_csrow_attr,
369 };
370
371 /* Create a CSROW object under specifed edac_mc_device */
372 static int edac_create_csrow_object(struct mem_ctl_info *mci,
373                                         struct csrow_info *csrow, int index)
374 {
375         struct kobject *kobj_mci = &mci->edac_mci_kobj;
376         struct kobject *kobj;
377         int chan;
378         int err;
379
380         /* generate ..../edac/mc/mc<id>/csrow<index>   */
381         memset(&csrow->kobj, 0, sizeof(csrow->kobj));
382         csrow->mci = mci;       /* include container up link */
383
384         /* bump the mci instance's kobject's ref count */
385         kobj = kobject_get(&mci->edac_mci_kobj);
386         if (!kobj) {
387                 err = -ENODEV;
388                 goto err_out;
389         }
390
391         /* Instanstiate the csrow object */
392         err = kobject_init_and_add(&csrow->kobj, &ktype_csrow, kobj_mci,
393                                    "csrow%d", index);
394         if (err)
395                 goto err_release_top_kobj;
396
397         /* At this point, to release a csrow kobj, one must
398          * call the kobject_put and allow that tear down
399          * to work the releasing
400          */
401
402         /* Create the dyanmic attribute files on this csrow,
403          * namely, the DIMM labels and the channel ce_count
404          */
405         for (chan = 0; chan < csrow->nr_channels; chan++) {
406                 err = edac_create_channel_files(&csrow->kobj, chan);
407                 if (err) {
408                         /* special case the unregister here */
409                         kobject_put(&csrow->kobj);
410                         goto err_out;
411                 }
412         }
413         kobject_uevent(&csrow->kobj, KOBJ_ADD);
414         return 0;
415
416         /* error unwind stack */
417 err_release_top_kobj:
418         kobject_put(&mci->edac_mci_kobj);
419
420 err_out:
421         return err;
422 }
423
424 /* default sysfs methods and data structures for the main MCI kobject */
425
426 static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
427                                         const char *data, size_t count)
428 {
429         int row, chan;
430
431         mci->ue_noinfo_count = 0;
432         mci->ce_noinfo_count = 0;
433         mci->ue_count = 0;
434         mci->ce_count = 0;
435
436         for (row = 0; row < mci->nr_csrows; row++) {
437                 struct csrow_info *ri = &mci->csrows[row];
438
439                 ri->ue_count = 0;
440                 ri->ce_count = 0;
441
442                 for (chan = 0; chan < ri->nr_channels; chan++)
443                         ri->channels[chan].ce_count = 0;
444         }
445
446         mci->start_time = jiffies;
447         return count;
448 }
449
450 /* memory scrubbing */
451 static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci,
452                                         const char *data, size_t count)
453 {
454         u32 bandwidth = -1;
455
456         if (mci->set_sdram_scrub_rate) {
457
458                 memctrl_int_store(&bandwidth, data, count);
459
460                 if (!(*mci->set_sdram_scrub_rate) (mci, &bandwidth)) {
461                         edac_printk(KERN_DEBUG, EDAC_MC,
462                                 "Scrub rate set successfully, applied: %d\n",
463                                 bandwidth);
464                 } else {
465                         /* FIXME: error codes maybe? */
466                         edac_printk(KERN_DEBUG, EDAC_MC,
467                                 "Scrub rate set FAILED, could not apply: %d\n",
468                                 bandwidth);
469                 }
470         } else {
471                 /* FIXME: produce "not implemented" ERROR for user-side. */
472                 edac_printk(KERN_WARNING, EDAC_MC,
473                         "Memory scrubbing 'set'control is not implemented!\n");
474         }
475         return count;
476 }
477
478 static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data)
479 {
480         u32 bandwidth = -1;
481
482         if (mci->get_sdram_scrub_rate) {
483                 if (!(*mci->get_sdram_scrub_rate) (mci, &bandwidth)) {
484                         edac_printk(KERN_DEBUG, EDAC_MC,
485                                 "Scrub rate successfully, fetched: %d\n",
486                                 bandwidth);
487                 } else {
488                         /* FIXME: error codes maybe? */
489                         edac_printk(KERN_DEBUG, EDAC_MC,
490                                 "Scrub rate fetch FAILED, got: %d\n",
491                                 bandwidth);
492                 }
493         } else {
494                 /* FIXME: produce "not implemented" ERROR for user-side.  */
495                 edac_printk(KERN_WARNING, EDAC_MC,
496                         "Memory scrubbing 'get' control is not implemented\n");
497         }
498         return sprintf(data, "%d\n", bandwidth);
499 }
500
501 /* default attribute files for the MCI object */
502 static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
503 {
504         return sprintf(data, "%d\n", mci->ue_count);
505 }
506
507 static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
508 {
509         return sprintf(data, "%d\n", mci->ce_count);
510 }
511
512 static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
513 {
514         return sprintf(data, "%d\n", mci->ce_noinfo_count);
515 }
516
517 static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
518 {
519         return sprintf(data, "%d\n", mci->ue_noinfo_count);
520 }
521
522 static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data)
523 {
524         return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
525 }
526
527 static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
528 {
529         return sprintf(data, "%s\n", mci->ctl_name);
530 }
531
532 static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data)
533 {
534         int total_pages, csrow_idx;
535
536         for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows;
537                 csrow_idx++) {
538                 struct csrow_info *csrow = &mci->csrows[csrow_idx];
539
540                 if (!csrow->nr_pages)
541                         continue;
542
543                 total_pages += csrow->nr_pages;
544         }
545
546         return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
547 }
548
549 #define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
550 #define to_mcidev_attr(a) container_of(a,struct mcidev_sysfs_attribute,attr)
551
552 /* MCI show/store functions for top most object */
553 static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
554                         char *buffer)
555 {
556         struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
557         struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
558
559         if (mcidev_attr->show)
560                 return mcidev_attr->show(mem_ctl_info, buffer);
561
562         return -EIO;
563 }
564
565 static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr,
566                         const char *buffer, size_t count)
567 {
568         struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
569         struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
570
571         if (mcidev_attr->store)
572                 return mcidev_attr->store(mem_ctl_info, buffer, count);
573
574         return -EIO;
575 }
576
577 /* Intermediate show/store table */
578 static struct sysfs_ops mci_ops = {
579         .show = mcidev_show,
580         .store = mcidev_store
581 };
582
583 #define MCIDEV_ATTR(_name,_mode,_show,_store)                   \
584 static struct mcidev_sysfs_attribute mci_attr_##_name = {                       \
585         .attr = {.name = __stringify(_name), .mode = _mode },   \
586         .show   = _show,                                        \
587         .store  = _store,                                       \
588 };
589
590 /* default Control file */
591 MCIDEV_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
592
593 /* default Attribute files */
594 MCIDEV_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
595 MCIDEV_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
596 MCIDEV_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
597 MCIDEV_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
598 MCIDEV_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
599 MCIDEV_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
600 MCIDEV_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
601
602 /* memory scrubber attribute file */
603 MCIDEV_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show,
604         mci_sdram_scrub_rate_store);
605
606 static struct mcidev_sysfs_attribute *mci_attr[] = {
607         &mci_attr_reset_counters,
608         &mci_attr_mc_name,
609         &mci_attr_size_mb,
610         &mci_attr_seconds_since_reset,
611         &mci_attr_ue_noinfo_count,
612         &mci_attr_ce_noinfo_count,
613         &mci_attr_ue_count,
614         &mci_attr_ce_count,
615         &mci_attr_sdram_scrub_rate,
616         NULL
617 };
618
619
620 /*
621  * Release of a MC controlling instance
622  *
623  *      each MC control instance has the following resources upon entry:
624  *              a) a ref count on the top memctl kobj
625  *              b) a ref count on this module
626  *
627  *      this function must decrement those ref counts and then
628  *      issue a free on the instance's memory
629  */
630 static void edac_mci_control_release(struct kobject *kobj)
631 {
632         struct mem_ctl_info *mci;
633
634         mci = to_mci(kobj);
635
636         debugf0("%s() mci instance idx=%d releasing\n", __func__, mci->mc_idx);
637
638         /* decrement the module ref count */
639         module_put(mci->owner);
640
641         /* free the mci instance memory here */
642         kfree(mci);
643 }
644
645 static struct kobj_type ktype_mci = {
646         .release = edac_mci_control_release,
647         .sysfs_ops = &mci_ops,
648         .default_attrs = (struct attribute **)mci_attr,
649 };
650
651 /* show/store, tables, etc for the MC kset */
652
653
654 struct memctrl_dev_attribute {
655         struct attribute attr;
656         void *value;
657          ssize_t(*show) (void *, char *);
658          ssize_t(*store) (void *, const char *, size_t);
659 };
660
661 /* Set of show/store abstract level functions for memory control object */
662 static ssize_t memctrl_dev_show(struct kobject *kobj,
663                                 struct attribute *attr, char *buffer)
664 {
665         struct memctrl_dev_attribute *memctrl_dev;
666         memctrl_dev = (struct memctrl_dev_attribute *)attr;
667
668         if (memctrl_dev->show)
669                 return memctrl_dev->show(memctrl_dev->value, buffer);
670
671         return -EIO;
672 }
673
674 static ssize_t memctrl_dev_store(struct kobject *kobj, struct attribute *attr,
675                                  const char *buffer, size_t count)
676 {
677         struct memctrl_dev_attribute *memctrl_dev;
678         memctrl_dev = (struct memctrl_dev_attribute *)attr;
679
680         if (memctrl_dev->store)
681                 return memctrl_dev->store(memctrl_dev->value, buffer, count);
682
683         return -EIO;
684 }
685
686 static struct sysfs_ops memctrlfs_ops = {
687         .show = memctrl_dev_show,
688         .store = memctrl_dev_store
689 };
690
691 #define MEMCTRL_ATTR(_name, _mode, _show, _store)                       \
692 static struct memctrl_dev_attribute attr_##_name = {                    \
693         .attr = {.name = __stringify(_name), .mode = _mode },   \
694         .value  = &_name,                                       \
695         .show   = _show,                                        \
696         .store  = _store,                                       \
697 };
698
699 #define MEMCTRL_STRING_ATTR(_name, _data, _mode, _show, _store) \
700 static struct memctrl_dev_attribute attr_##_name = {                    \
701         .attr = {.name = __stringify(_name), .mode = _mode },   \
702         .value  = _data,                                        \
703         .show   = _show,                                        \
704         .store  = _store,                                       \
705 };
706
707 /* csrow<id> control files */
708 MEMCTRL_ATTR(edac_mc_panic_on_ue,
709         S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
710
711 MEMCTRL_ATTR(edac_mc_log_ue,
712         S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
713
714 MEMCTRL_ATTR(edac_mc_log_ce,
715         S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
716
717 MEMCTRL_ATTR(edac_mc_poll_msec,
718         S_IRUGO | S_IWUSR, memctrl_int_show, poll_msec_int_store);
719
720 /* Base Attributes of the memory ECC object */
721 static struct memctrl_dev_attribute *memctrl_attr[] = {
722         &attr_edac_mc_panic_on_ue,
723         &attr_edac_mc_log_ue,
724         &attr_edac_mc_log_ce,
725         &attr_edac_mc_poll_msec,
726         NULL,
727 };
728
729
730 /* the ktype for the mc_kset internal kobj */
731 static struct kobj_type ktype_mc_set_attribs = {
732         .sysfs_ops = &memctrlfs_ops,
733         .default_attrs = (struct attribute **)memctrl_attr,
734 };
735
736 /* EDAC memory controller sysfs kset:
737  *      /sys/devices/system/edac/mc
738  */
739 static struct kset mc_kset = {
740         .kobj = {.ktype = &ktype_mc_set_attribs },
741 };
742
743
744 /*
745  * edac_mc_register_sysfs_main_kobj
746  *
747  *      setups and registers the main kobject for each mci
748  */
749 int edac_mc_register_sysfs_main_kobj(struct mem_ctl_info *mci)
750 {
751         struct kobject *kobj_mci;
752         int err;
753
754         debugf1("%s()\n", __func__);
755
756         kobj_mci = &mci->edac_mci_kobj;
757
758         /* Init the mci's kobject */
759         memset(kobj_mci, 0, sizeof(*kobj_mci));
760
761         /* Record which module 'owns' this control structure
762          * and bump the ref count of the module
763          */
764         mci->owner = THIS_MODULE;
765
766         /* bump ref count on this module */
767         if (!try_module_get(mci->owner)) {
768                 err = -ENODEV;
769                 goto fail_out;
770         }
771
772         /* this instance become part of the mc_kset */
773         kobj_mci->kset = &mc_kset;
774
775         /* register the mc<id> kobject to the mc_kset */
776         err = kobject_init_and_add(kobj_mci, &ktype_mci, NULL,
777                                    "mc%d", mci->mc_idx);
778         if (err) {
779                 debugf1("%s()Failed to register '.../edac/mc%d'\n",
780                         __func__, mci->mc_idx);
781                 goto kobj_reg_fail;
782         }
783         kobject_uevent(kobj_mci, KOBJ_ADD);
784
785         /* At this point, to 'free' the control struct,
786          * edac_mc_unregister_sysfs_main_kobj() must be used
787          */
788
789         debugf1("%s() Registered '.../edac/mc%d' kobject\n",
790                 __func__, mci->mc_idx);
791
792         return 0;
793
794         /* Error exit stack */
795
796 kobj_reg_fail:
797         module_put(mci->owner);
798
799 fail_out:
800         return err;
801 }
802
803 /*
804  * edac_mc_register_sysfs_main_kobj
805  *
806  *      tears down and the main mci kobject from the mc_kset
807  */
808 void edac_mc_unregister_sysfs_main_kobj(struct mem_ctl_info *mci)
809 {
810         /* delete the kobj from the mc_kset */
811         kobject_put(&mci->edac_mci_kobj);
812 }
813
814 #define EDAC_DEVICE_SYMLINK     "device"
815
816 /*
817  * edac_create_mci_instance_attributes
818  *      create MC driver specific attributes at the topmost level
819  *      directory of this mci instance.
820  */
821 static int edac_create_mci_instance_attributes(struct mem_ctl_info *mci)
822 {
823         int err;
824         struct mcidev_sysfs_attribute *sysfs_attrib;
825
826         /* point to the start of the array and iterate over it
827          * adding each attribute listed to this mci instance's kobject
828          */
829         sysfs_attrib = mci->mc_driver_sysfs_attributes;
830
831         while (sysfs_attrib && sysfs_attrib->attr.name) {
832                 err = sysfs_create_file(&mci->edac_mci_kobj,
833                                         (struct attribute*) sysfs_attrib);
834                 if (err) {
835                         return err;
836                 }
837
838                 sysfs_attrib++;
839         }
840
841         return 0;
842 }
843
844 /*
845  * edac_remove_mci_instance_attributes
846  *      remove MC driver specific attributes at the topmost level
847  *      directory of this mci instance.
848  */
849 static void edac_remove_mci_instance_attributes(struct mem_ctl_info *mci)
850 {
851         struct mcidev_sysfs_attribute *sysfs_attrib;
852
853         /* point to the start of the array and iterate over it
854          * adding each attribute listed to this mci instance's kobject
855          */
856         sysfs_attrib = mci->mc_driver_sysfs_attributes;
857
858         /* loop if there are attributes and until we hit a NULL entry */
859         while (sysfs_attrib && sysfs_attrib->attr.name) {
860                 sysfs_remove_file(&mci->edac_mci_kobj,
861                                         (struct attribute *) sysfs_attrib);
862                 sysfs_attrib++;
863         }
864 }
865
866
867 /*
868  * Create a new Memory Controller kobject instance,
869  *      mc<id> under the 'mc' directory
870  *
871  * Return:
872  *      0       Success
873  *      !0      Failure
874  */
875 int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
876 {
877         int i;
878         int err;
879         struct csrow_info *csrow;
880         struct kobject *kobj_mci = &mci->edac_mci_kobj;
881
882         debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
883
884         /* create a symlink for the device */
885         err = sysfs_create_link(kobj_mci, &mci->dev->kobj,
886                                 EDAC_DEVICE_SYMLINK);
887         if (err) {
888                 debugf1("%s() failure to create symlink\n", __func__);
889                 goto fail0;
890         }
891
892         /* If the low level driver desires some attributes,
893          * then create them now for the driver.
894          */
895         if (mci->mc_driver_sysfs_attributes) {
896                 err = edac_create_mci_instance_attributes(mci);
897                 if (err) {
898                         debugf1("%s() failure to create mci attributes\n",
899                                 __func__);
900                         goto fail0;
901                 }
902         }
903
904         /* Make directories for each CSROW object under the mc<id> kobject
905          */
906         for (i = 0; i < mci->nr_csrows; i++) {
907                 csrow = &mci->csrows[i];
908
909                 /* Only expose populated CSROWs */
910                 if (csrow->nr_pages > 0) {
911                         err = edac_create_csrow_object(mci, csrow, i);
912                         if (err) {
913                                 debugf1("%s() failure: create csrow %d obj\n",
914                                         __func__, i);
915                                 goto fail1;
916                         }
917                 }
918         }
919
920         return 0;
921
922         /* CSROW error: backout what has already been registered,  */
923 fail1:
924         for (i--; i >= 0; i--) {
925                 if (csrow->nr_pages > 0) {
926                         kobject_put(&mci->csrows[i].kobj);
927                 }
928         }
929
930         /* remove the mci instance's attributes, if any */
931         edac_remove_mci_instance_attributes(mci);
932
933         /* remove the symlink */
934         sysfs_remove_link(kobj_mci, EDAC_DEVICE_SYMLINK);
935
936 fail0:
937         return err;
938 }
939
940 /*
941  * remove a Memory Controller instance
942  */
943 void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
944 {
945         int i;
946
947         debugf0("%s()\n", __func__);
948
949         /* remove all csrow kobjects */
950         for (i = 0; i < mci->nr_csrows; i++) {
951                 if (mci->csrows[i].nr_pages > 0) {
952                         debugf0("%s()  unreg csrow-%d\n", __func__, i);
953                         kobject_put(&mci->csrows[i].kobj);
954                 }
955         }
956
957         debugf0("%s()  remove_link\n", __func__);
958
959         /* remove the symlink */
960         sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
961
962         debugf0("%s()  remove_mci_instance\n", __func__);
963
964         /* remove this mci instance's attribtes */
965         edac_remove_mci_instance_attributes(mci);
966
967         debugf0("%s()  unregister this mci kobj\n", __func__);
968
969         /* unregister this instance's kobject */
970         kobject_put(&mci->edac_mci_kobj);
971 }
972
973
974
975
976 /*
977  * edac_setup_sysfs_mc_kset(void)
978  *
979  * Initialize the mc_kset for the 'mc' entry
980  *      This requires creating the top 'mc' directory with a kset
981  *      and its controls/attributes.
982  *
983  *      To this 'mc' kset, instance 'mci' will be grouped as children.
984  *
985  * Return:  0 SUCCESS
986  *         !0 FAILURE error code
987  */
988 int edac_sysfs_setup_mc_kset(void)
989 {
990         int err = 0;
991         struct sysdev_class *edac_class;
992
993         debugf1("%s()\n", __func__);
994
995         /* get the /sys/devices/system/edac class reference */
996         edac_class = edac_get_edac_class();
997         if (edac_class == NULL) {
998                 debugf1("%s() no edac_class error=%d\n", __func__, err);
999                 goto fail_out;
1000         }
1001
1002         /* Init the MC's kobject */
1003         kobject_set_name(&mc_kset.kobj, "mc");
1004         mc_kset.kobj.parent = &edac_class->kset.kobj;
1005
1006         /* register the mc_kset */
1007         err = kset_register(&mc_kset);
1008         if (err) {
1009                 debugf1("%s() Failed to register '.../edac/mc'\n", __func__);
1010                 goto fail_out;
1011         }
1012
1013         debugf1("%s() Registered '.../edac/mc' kobject\n", __func__);
1014
1015         return 0;
1016
1017
1018         /* error unwind stack */
1019 fail_out:
1020         return err;
1021 }
1022
1023 /*
1024  * edac_sysfs_teardown_mc_kset
1025  *
1026  *      deconstruct the mc_ket for memory controllers
1027  */
1028 void edac_sysfs_teardown_mc_kset(void)
1029 {
1030         kset_unregister(&mc_kset);
1031 }
1032