forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathedac_mc.c
2004 lines (1660 loc) · 50.9 KB
/
edac_mc.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* edac_mc kernel module
* (C) 2005, 2006 Linux Networx (http://lnxi.com)
* This file may be distributed under the terms of the
* GNU General Public License.
*
* Written by Thayne Harbaugh
* Based on work by Dan Hollis <goemon at anime dot net> and others.
* http://www.anime.net/~goemon/linux-ecc/
*
* Modified by Dave Peterson and Doug Thompson
*
*/
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/smp.h>
#include <linux/init.h>
#include <linux/sysctl.h>
#include <linux/highmem.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/sysdev.h>
#include <linux/ctype.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <asm/uaccess.h>
#include <asm/page.h>
#include <asm/edac.h>
#include "edac_mc.h"
#define EDAC_MC_VERSION "Ver: 2.0.1 " __DATE__
#ifdef CONFIG_EDAC_DEBUG
/* Values of 0 to 4 will generate output */
int edac_debug_level = 1;
EXPORT_SYMBOL_GPL(edac_debug_level);
#endif
/* EDAC Controls, setable by module parameter, and sysfs */
static int log_ue = 1;
static int log_ce = 1;
static int panic_on_ue;
static int poll_msec = 1000;
/* lock to memory controller's control array */
static DECLARE_MUTEX(mem_ctls_mutex);
static struct list_head mc_devices = LIST_HEAD_INIT(mc_devices);
static struct task_struct *edac_thread;
#ifdef CONFIG_PCI
static int check_pci_parity = 0; /* default YES check PCI parity */
static int panic_on_pci_parity; /* default no panic on PCI Parity */
static atomic_t pci_parity_count = ATOMIC_INIT(0);
static struct kobject edac_pci_kobj; /* /sys/devices/system/edac/pci */
static struct completion edac_pci_kobj_complete;
#endif /* CONFIG_PCI */
/* START sysfs data and methods */
static const char *mem_types[] = {
[MEM_EMPTY] = "Empty",
[MEM_RESERVED] = "Reserved",
[MEM_UNKNOWN] = "Unknown",
[MEM_FPM] = "FPM",
[MEM_EDO] = "EDO",
[MEM_BEDO] = "BEDO",
[MEM_SDR] = "Unbuffered-SDR",
[MEM_RDR] = "Registered-SDR",
[MEM_DDR] = "Unbuffered-DDR",
[MEM_RDDR] = "Registered-DDR",
[MEM_RMBS] = "RMBS"
};
static const char *dev_types[] = {
[DEV_UNKNOWN] = "Unknown",
[DEV_X1] = "x1",
[DEV_X2] = "x2",
[DEV_X4] = "x4",
[DEV_X8] = "x8",
[DEV_X16] = "x16",
[DEV_X32] = "x32",
[DEV_X64] = "x64"
};
static const char *edac_caps[] = {
[EDAC_UNKNOWN] = "Unknown",
[EDAC_NONE] = "None",
[EDAC_RESERVED] = "Reserved",
[EDAC_PARITY] = "PARITY",
[EDAC_EC] = "EC",
[EDAC_SECDED] = "SECDED",
[EDAC_S2ECD2ED] = "S2ECD2ED",
[EDAC_S4ECD4ED] = "S4ECD4ED",
[EDAC_S8ECD8ED] = "S8ECD8ED",
[EDAC_S16ECD16ED] = "S16ECD16ED"
};
/* sysfs object: /sys/devices/system/edac */
static struct sysdev_class edac_class = {
set_kset_name("edac"),
};
/* sysfs object:
* /sys/devices/system/edac/mc
*/
static struct kobject edac_memctrl_kobj;
/* We use these to wait for the reference counts on edac_memctrl_kobj and
* edac_pci_kobj to reach 0.
*/
static struct completion edac_memctrl_kobj_complete;
/*
* /sys/devices/system/edac/mc;
* data structures and methods
*/
static ssize_t memctrl_int_show(void *ptr, char *buffer)
{
int *value = (int*) ptr;
return sprintf(buffer, "%u\n", *value);
}
static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count)
{
int *value = (int*) ptr;
if (isdigit(*buffer))
*value = simple_strtoul(buffer, NULL, 0);
return count;
}
struct memctrl_dev_attribute {
struct attribute attr;
void *value;
ssize_t (*show)(void *,char *);
ssize_t (*store)(void *, const char *, size_t);
};
/* Set of show/store abstract level functions for memory control object */
static ssize_t memctrl_dev_show(struct kobject *kobj,
struct attribute *attr, char *buffer)
{
struct memctrl_dev_attribute *memctrl_dev;
memctrl_dev = (struct memctrl_dev_attribute*)attr;
if (memctrl_dev->show)
return memctrl_dev->show(memctrl_dev->value, buffer);
return -EIO;
}
static ssize_t memctrl_dev_store(struct kobject *kobj, struct attribute *attr,
const char *buffer, size_t count)
{
struct memctrl_dev_attribute *memctrl_dev;
memctrl_dev = (struct memctrl_dev_attribute*)attr;
if (memctrl_dev->store)
return memctrl_dev->store(memctrl_dev->value, buffer, count);
return -EIO;
}
static struct sysfs_ops memctrlfs_ops = {
.show = memctrl_dev_show,
.store = memctrl_dev_store
};
#define MEMCTRL_ATTR(_name,_mode,_show,_store) \
struct memctrl_dev_attribute attr_##_name = { \
.attr = {.name = __stringify(_name), .mode = _mode }, \
.value = &_name, \
.show = _show, \
.store = _store, \
};
#define MEMCTRL_STRING_ATTR(_name,_data,_mode,_show,_store) \
struct memctrl_dev_attribute attr_##_name = { \
.attr = {.name = __stringify(_name), .mode = _mode }, \
.value = _data, \
.show = _show, \
.store = _store, \
};
/* csrow<id> control files */
MEMCTRL_ATTR(panic_on_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
MEMCTRL_ATTR(log_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
MEMCTRL_ATTR(log_ce,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
MEMCTRL_ATTR(poll_msec,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
/* Base Attributes of the memory ECC object */
static struct memctrl_dev_attribute *memctrl_attr[] = {
&attr_panic_on_ue,
&attr_log_ue,
&attr_log_ce,
&attr_poll_msec,
NULL,
};
/* Main MC kobject release() function */
static void edac_memctrl_master_release(struct kobject *kobj)
{
debugf1("%s()\n", __func__);
complete(&edac_memctrl_kobj_complete);
}
static struct kobj_type ktype_memctrl = {
.release = edac_memctrl_master_release,
.sysfs_ops = &memctrlfs_ops,
.default_attrs = (struct attribute **) memctrl_attr,
};
/* Initialize the main sysfs entries for edac:
* /sys/devices/system/edac
*
* and children
*
* Return: 0 SUCCESS
* !0 FAILURE
*/
static int edac_sysfs_memctrl_setup(void)
{
int err = 0;
debugf1("%s()\n", __func__);
/* create the /sys/devices/system/edac directory */
err = sysdev_class_register(&edac_class);
if (err) {
debugf1("%s() error=%d\n", __func__, err);
return err;
}
/* Init the MC's kobject */
memset(&edac_memctrl_kobj, 0, sizeof (edac_memctrl_kobj));
edac_memctrl_kobj.parent = &edac_class.kset.kobj;
edac_memctrl_kobj.ktype = &ktype_memctrl;
/* generate sysfs "..../edac/mc" */
err = kobject_set_name(&edac_memctrl_kobj,"mc");
if (err)
goto fail;
/* FIXME: maybe new sysdev_create_subdir() */
err = kobject_register(&edac_memctrl_kobj);
if (err) {
debugf1("Failed to register '.../edac/mc'\n");
goto fail;
}
debugf1("Registered '.../edac/mc' kobject\n");
return 0;
fail:
sysdev_class_unregister(&edac_class);
return err;
}
/*
* MC teardown:
* the '..../edac/mc' kobject followed by '..../edac' itself
*/
static void edac_sysfs_memctrl_teardown(void)
{
debugf0("MC: " __FILE__ ": %s()\n", __func__);
/* Unregister the MC's kobject and wait for reference count to reach
* 0.
*/
init_completion(&edac_memctrl_kobj_complete);
kobject_unregister(&edac_memctrl_kobj);
wait_for_completion(&edac_memctrl_kobj_complete);
/* Unregister the 'edac' object */
sysdev_class_unregister(&edac_class);
}
#ifdef CONFIG_PCI
static ssize_t edac_pci_int_show(void *ptr, char *buffer)
{
int *value = ptr;
return sprintf(buffer,"%d\n",*value);
}
static ssize_t edac_pci_int_store(void *ptr, const char *buffer, size_t count)
{
int *value = ptr;
if (isdigit(*buffer))
*value = simple_strtoul(buffer,NULL,0);
return count;
}
struct edac_pci_dev_attribute {
struct attribute attr;
void *value;
ssize_t (*show)(void *,char *);
ssize_t (*store)(void *, const char *,size_t);
};
/* Set of show/store abstract level functions for PCI Parity object */
static ssize_t edac_pci_dev_show(struct kobject *kobj, struct attribute *attr,
char *buffer)
{
struct edac_pci_dev_attribute *edac_pci_dev;
edac_pci_dev= (struct edac_pci_dev_attribute*)attr;
if (edac_pci_dev->show)
return edac_pci_dev->show(edac_pci_dev->value, buffer);
return -EIO;
}
static ssize_t edac_pci_dev_store(struct kobject *kobj,
struct attribute *attr, const char *buffer, size_t count)
{
struct edac_pci_dev_attribute *edac_pci_dev;
edac_pci_dev= (struct edac_pci_dev_attribute*)attr;
if (edac_pci_dev->show)
return edac_pci_dev->store(edac_pci_dev->value, buffer, count);
return -EIO;
}
static struct sysfs_ops edac_pci_sysfs_ops = {
.show = edac_pci_dev_show,
.store = edac_pci_dev_store
};
#define EDAC_PCI_ATTR(_name,_mode,_show,_store) \
struct edac_pci_dev_attribute edac_pci_attr_##_name = { \
.attr = {.name = __stringify(_name), .mode = _mode }, \
.value = &_name, \
.show = _show, \
.store = _store, \
};
#define EDAC_PCI_STRING_ATTR(_name,_data,_mode,_show,_store) \
struct edac_pci_dev_attribute edac_pci_attr_##_name = { \
.attr = {.name = __stringify(_name), .mode = _mode }, \
.value = _data, \
.show = _show, \
.store = _store, \
};
/* PCI Parity control files */
EDAC_PCI_ATTR(check_pci_parity, S_IRUGO|S_IWUSR, edac_pci_int_show,
edac_pci_int_store);
EDAC_PCI_ATTR(panic_on_pci_parity, S_IRUGO|S_IWUSR, edac_pci_int_show,
edac_pci_int_store);
EDAC_PCI_ATTR(pci_parity_count, S_IRUGO, edac_pci_int_show, NULL);
/* Base Attributes of the memory ECC object */
static struct edac_pci_dev_attribute *edac_pci_attr[] = {
&edac_pci_attr_check_pci_parity,
&edac_pci_attr_panic_on_pci_parity,
&edac_pci_attr_pci_parity_count,
NULL,
};
/* No memory to release */
static void edac_pci_release(struct kobject *kobj)
{
debugf1("%s()\n", __func__);
complete(&edac_pci_kobj_complete);
}
static struct kobj_type ktype_edac_pci = {
.release = edac_pci_release,
.sysfs_ops = &edac_pci_sysfs_ops,
.default_attrs = (struct attribute **) edac_pci_attr,
};
/**
* edac_sysfs_pci_setup()
*
*/
static int edac_sysfs_pci_setup(void)
{
int err;
debugf1("%s()\n", __func__);
memset(&edac_pci_kobj, 0, sizeof(edac_pci_kobj));
edac_pci_kobj.parent = &edac_class.kset.kobj;
edac_pci_kobj.ktype = &ktype_edac_pci;
err = kobject_set_name(&edac_pci_kobj, "pci");
if (!err) {
/* Instanstiate the csrow object */
/* FIXME: maybe new sysdev_create_subdir() */
err = kobject_register(&edac_pci_kobj);
if (err)
debugf1("Failed to register '.../edac/pci'\n");
else
debugf1("Registered '.../edac/pci' kobject\n");
}
return err;
}
static void edac_sysfs_pci_teardown(void)
{
debugf0("%s()\n", __func__);
init_completion(&edac_pci_kobj_complete);
kobject_unregister(&edac_pci_kobj);
wait_for_completion(&edac_pci_kobj_complete);
}
static u16 get_pci_parity_status(struct pci_dev *dev, int secondary)
{
int where;
u16 status;
where = secondary ? PCI_SEC_STATUS : PCI_STATUS;
pci_read_config_word(dev, where, &status);
/* If we get back 0xFFFF then we must suspect that the card has been
* pulled but the Linux PCI layer has not yet finished cleaning up.
* We don't want to report on such devices
*/
if (status == 0xFFFF) {
u32 sanity;
pci_read_config_dword(dev, 0, &sanity);
if (sanity == 0xFFFFFFFF)
return 0;
}
status &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR |
PCI_STATUS_PARITY;
if (status)
/* reset only the bits we are interested in */
pci_write_config_word(dev, where, status);
return status;
}
typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev);
/* Clear any PCI parity errors logged by this device. */
static void edac_pci_dev_parity_clear(struct pci_dev *dev)
{
u8 header_type;
get_pci_parity_status(dev, 0);
/* read the device TYPE, looking for bridges */
pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE)
get_pci_parity_status(dev, 1);
}
/*
* PCI Parity polling
*
*/
static void edac_pci_dev_parity_test(struct pci_dev *dev)
{
u16 status;
u8 header_type;
/* read the STATUS register on this device
*/
status = get_pci_parity_status(dev, 0);
debugf2("PCI STATUS= 0x%04x %s\n", status, dev->dev.bus_id );
/* check the status reg for errors */
if (status) {
if (status & (PCI_STATUS_SIG_SYSTEM_ERROR))
edac_printk(KERN_CRIT, EDAC_PCI,
"Signaled System Error on %s\n",
pci_name(dev));
if (status & (PCI_STATUS_PARITY)) {
edac_printk(KERN_CRIT, EDAC_PCI,
"Master Data Parity Error on %s\n",
pci_name(dev));
atomic_inc(&pci_parity_count);
}
if (status & (PCI_STATUS_DETECTED_PARITY)) {
edac_printk(KERN_CRIT, EDAC_PCI,
"Detected Parity Error on %s\n",
pci_name(dev));
atomic_inc(&pci_parity_count);
}
}
/* read the device TYPE, looking for bridges */
pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
debugf2("PCI HEADER TYPE= 0x%02x %s\n", header_type, dev->dev.bus_id );
if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
/* On bridges, need to examine secondary status register */
status = get_pci_parity_status(dev, 1);
debugf2("PCI SEC_STATUS= 0x%04x %s\n",
status, dev->dev.bus_id );
/* check the secondary status reg for errors */
if (status) {
if (status & (PCI_STATUS_SIG_SYSTEM_ERROR))
edac_printk(KERN_CRIT, EDAC_PCI, "Bridge "
"Signaled System Error on %s\n",
pci_name(dev));
if (status & (PCI_STATUS_PARITY)) {
edac_printk(KERN_CRIT, EDAC_PCI, "Bridge "
"Master Data Parity Error on "
"%s\n", pci_name(dev));
atomic_inc(&pci_parity_count);
}
if (status & (PCI_STATUS_DETECTED_PARITY)) {
edac_printk(KERN_CRIT, EDAC_PCI, "Bridge "
"Detected Parity Error on %s\n",
pci_name(dev));
atomic_inc(&pci_parity_count);
}
}
}
}
/*
* pci_dev parity list iterator
* Scan the PCI device list for one iteration, looking for SERRORs
* Master Parity ERRORS or Parity ERRORs on primary or secondary devices
*/
static inline void edac_pci_dev_parity_iterator(pci_parity_check_fn_t fn)
{
struct pci_dev *dev = NULL;
/* request for kernel access to the next PCI device, if any,
* and while we are looking at it have its reference count
* bumped until we are done with it
*/
while((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
fn(dev);
}
}
static void do_pci_parity_check(void)
{
unsigned long flags;
int before_count;
debugf3("%s()\n", __func__);
if (!check_pci_parity)
return;
before_count = atomic_read(&pci_parity_count);
/* scan all PCI devices looking for a Parity Error on devices and
* bridges
*/
local_irq_save(flags);
edac_pci_dev_parity_iterator(edac_pci_dev_parity_test);
local_irq_restore(flags);
/* Only if operator has selected panic on PCI Error */
if (panic_on_pci_parity) {
/* If the count is different 'after' from 'before' */
if (before_count != atomic_read(&pci_parity_count))
panic("EDAC: PCI Parity Error");
}
}
static inline void clear_pci_parity_errors(void)
{
/* Clear any PCI bus parity errors that devices initially have logged
* in their registers.
*/
edac_pci_dev_parity_iterator(edac_pci_dev_parity_clear);
}
#else /* CONFIG_PCI */
/* pre-process these away */
#define do_pci_parity_check()
#define clear_pci_parity_errors()
#define edac_sysfs_pci_teardown()
#define edac_sysfs_pci_setup() (0)
#endif /* CONFIG_PCI */
/* EDAC sysfs CSROW data structures and methods
*/
/* Set of more default csrow<id> attribute show/store functions */
static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data, int private)
{
return sprintf(data,"%u\n", csrow->ue_count);
}
static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data, int private)
{
return sprintf(data,"%u\n", csrow->ce_count);
}
static ssize_t csrow_size_show(struct csrow_info *csrow, char *data, int private)
{
return sprintf(data,"%u\n", PAGES_TO_MiB(csrow->nr_pages));
}
static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data, int private)
{
return sprintf(data,"%s\n", mem_types[csrow->mtype]);
}
static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data, int private)
{
return sprintf(data,"%s\n", dev_types[csrow->dtype]);
}
static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data, int private)
{
return sprintf(data,"%s\n", edac_caps[csrow->edac_mode]);
}
/* show/store functions for DIMM Label attributes */
static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
char *data, int channel)
{
return snprintf(data, EDAC_MC_LABEL_LEN,"%s",
csrow->channels[channel].label);
}
static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
const char *data,
size_t count,
int channel)
{
ssize_t max_size = 0;
max_size = min((ssize_t)count,(ssize_t)EDAC_MC_LABEL_LEN-1);
strncpy(csrow->channels[channel].label, data, max_size);
csrow->channels[channel].label[max_size] = '\0';
return max_size;
}
/* show function for dynamic chX_ce_count attribute */
static ssize_t channel_ce_count_show(struct csrow_info *csrow,
char *data,
int channel)
{
return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
}
/* csrow specific attribute structure */
struct csrowdev_attribute {
struct attribute attr;
ssize_t (*show)(struct csrow_info *,char *,int);
ssize_t (*store)(struct csrow_info *, const char *,size_t,int);
int private;
};
#define to_csrow(k) container_of(k, struct csrow_info, kobj)
#define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
/* Set of show/store higher level functions for default csrow attributes */
static ssize_t csrowdev_show(struct kobject *kobj,
struct attribute *attr,
char *buffer)
{
struct csrow_info *csrow = to_csrow(kobj);
struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
if (csrowdev_attr->show)
return csrowdev_attr->show(csrow,
buffer,
csrowdev_attr->private);
return -EIO;
}
static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
const char *buffer, size_t count)
{
struct csrow_info *csrow = to_csrow(kobj);
struct csrowdev_attribute * csrowdev_attr = to_csrowdev_attr(attr);
if (csrowdev_attr->store)
return csrowdev_attr->store(csrow,
buffer,
count,
csrowdev_attr->private);
return -EIO;
}
static struct sysfs_ops csrowfs_ops = {
.show = csrowdev_show,
.store = csrowdev_store
};
#define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \
struct csrowdev_attribute attr_##_name = { \
.attr = {.name = __stringify(_name), .mode = _mode }, \
.show = _show, \
.store = _store, \
.private = _private, \
};
/* default cwrow<id>/attribute files */
CSROWDEV_ATTR(size_mb,S_IRUGO,csrow_size_show,NULL,0);
CSROWDEV_ATTR(dev_type,S_IRUGO,csrow_dev_type_show,NULL,0);
CSROWDEV_ATTR(mem_type,S_IRUGO,csrow_mem_type_show,NULL,0);
CSROWDEV_ATTR(edac_mode,S_IRUGO,csrow_edac_mode_show,NULL,0);
CSROWDEV_ATTR(ue_count,S_IRUGO,csrow_ue_count_show,NULL,0);
CSROWDEV_ATTR(ce_count,S_IRUGO,csrow_ce_count_show,NULL,0);
/* default attributes of the CSROW<id> object */
static struct csrowdev_attribute *default_csrow_attr[] = {
&attr_dev_type,
&attr_mem_type,
&attr_edac_mode,
&attr_size_mb,
&attr_ue_count,
&attr_ce_count,
NULL,
};
/* possible dynamic channel DIMM Label attribute files */
CSROWDEV_ATTR(ch0_dimm_label,S_IRUGO|S_IWUSR,
channel_dimm_label_show,
channel_dimm_label_store,
0 );
CSROWDEV_ATTR(ch1_dimm_label,S_IRUGO|S_IWUSR,
channel_dimm_label_show,
channel_dimm_label_store,
1 );
CSROWDEV_ATTR(ch2_dimm_label,S_IRUGO|S_IWUSR,
channel_dimm_label_show,
channel_dimm_label_store,
2 );
CSROWDEV_ATTR(ch3_dimm_label,S_IRUGO|S_IWUSR,
channel_dimm_label_show,
channel_dimm_label_store,
3 );
CSROWDEV_ATTR(ch4_dimm_label,S_IRUGO|S_IWUSR,
channel_dimm_label_show,
channel_dimm_label_store,
4 );
CSROWDEV_ATTR(ch5_dimm_label,S_IRUGO|S_IWUSR,
channel_dimm_label_show,
channel_dimm_label_store,
5 );
/* Total possible dynamic DIMM Label attribute file table */
static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
&attr_ch0_dimm_label,
&attr_ch1_dimm_label,
&attr_ch2_dimm_label,
&attr_ch3_dimm_label,
&attr_ch4_dimm_label,
&attr_ch5_dimm_label
};
/* possible dynamic channel ce_count attribute files */
CSROWDEV_ATTR(ch0_ce_count,S_IRUGO|S_IWUSR,
channel_ce_count_show,
NULL,
0 );
CSROWDEV_ATTR(ch1_ce_count,S_IRUGO|S_IWUSR,
channel_ce_count_show,
NULL,
1 );
CSROWDEV_ATTR(ch2_ce_count,S_IRUGO|S_IWUSR,
channel_ce_count_show,
NULL,
2 );
CSROWDEV_ATTR(ch3_ce_count,S_IRUGO|S_IWUSR,
channel_ce_count_show,
NULL,
3 );
CSROWDEV_ATTR(ch4_ce_count,S_IRUGO|S_IWUSR,
channel_ce_count_show,
NULL,
4 );
CSROWDEV_ATTR(ch5_ce_count,S_IRUGO|S_IWUSR,
channel_ce_count_show,
NULL,
5 );
/* Total possible dynamic ce_count attribute file table */
static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
&attr_ch0_ce_count,
&attr_ch1_ce_count,
&attr_ch2_ce_count,
&attr_ch3_ce_count,
&attr_ch4_ce_count,
&attr_ch5_ce_count
};
#define EDAC_NR_CHANNELS 6
/* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */
static int edac_create_channel_files(struct kobject *kobj, int chan)
{
int err=-ENODEV;
if (chan >= EDAC_NR_CHANNELS)
return err;
/* create the DIMM label attribute file */
err = sysfs_create_file(kobj,
(struct attribute *) dynamic_csrow_dimm_attr[chan]);
if (!err) {
/* create the CE Count attribute file */
err = sysfs_create_file(kobj,
(struct attribute *) dynamic_csrow_ce_count_attr[chan]);
} else {
debugf1("%s() dimm labels and ce_count files created", __func__);
}
return err;
}
/* No memory to release for this kobj */
static void edac_csrow_instance_release(struct kobject *kobj)
{
struct csrow_info *cs;
cs = container_of(kobj, struct csrow_info, kobj);
complete(&cs->kobj_complete);
}
/* the kobj_type instance for a CSROW */
static struct kobj_type ktype_csrow = {
.release = edac_csrow_instance_release,
.sysfs_ops = &csrowfs_ops,
.default_attrs = (struct attribute **) default_csrow_attr,
};
/* Create a CSROW object under specifed edac_mc_device */
static int edac_create_csrow_object(
struct kobject *edac_mci_kobj,
struct csrow_info *csrow,
int index)
{
int err = 0;
int chan;
memset(&csrow->kobj, 0, sizeof(csrow->kobj));
/* generate ..../edac/mc/mc<id>/csrow<index> */
csrow->kobj.parent = edac_mci_kobj;
csrow->kobj.ktype = &ktype_csrow;
/* name this instance of csrow<id> */
err = kobject_set_name(&csrow->kobj,"csrow%d",index);
if (err)
goto error_exit;
/* Instanstiate the csrow object */
err = kobject_register(&csrow->kobj);
if (!err) {
/* Create the dyanmic attribute files on this csrow,
* namely, the DIMM labels and the channel ce_count
*/
for (chan = 0; chan < csrow->nr_channels; chan++) {
err = edac_create_channel_files(&csrow->kobj,chan);
if (err)
break;
}
}
error_exit:
return err;
}
/* default sysfs methods and data structures for the main MCI kobject */
static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
const char *data, size_t count)
{
int row, chan;
mci->ue_noinfo_count = 0;
mci->ce_noinfo_count = 0;
mci->ue_count = 0;
mci->ce_count = 0;
for (row = 0; row < mci->nr_csrows; row++) {
struct csrow_info *ri = &mci->csrows[row];
ri->ue_count = 0;
ri->ce_count = 0;
for (chan = 0; chan < ri->nr_channels; chan++)
ri->channels[chan].ce_count = 0;
}
mci->start_time = jiffies;
return count;
}
/* memory scrubbing */
static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci,
const char *data, size_t count)
{
u32 bandwidth = -1;
if (mci->set_sdram_scrub_rate) {
memctrl_int_store(&bandwidth, data, count);
if (!(*mci->set_sdram_scrub_rate)(mci, &bandwidth)) {
edac_printk(KERN_DEBUG, EDAC_MC,
"Scrub rate set successfully, applied: %d\n",
bandwidth);
} else {
/* FIXME: error codes maybe? */
edac_printk(KERN_DEBUG, EDAC_MC,
"Scrub rate set FAILED, could not apply: %d\n",
bandwidth);
}
} else {
/* FIXME: produce "not implemented" ERROR for user-side. */
edac_printk(KERN_WARNING, EDAC_MC,
"Memory scrubbing 'set'control is not implemented!\n");
}
return count;
}
static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data)
{
u32 bandwidth = -1;
if (mci->get_sdram_scrub_rate) {
if (!(*mci->get_sdram_scrub_rate)(mci, &bandwidth)) {
edac_printk(KERN_DEBUG, EDAC_MC,
"Scrub rate successfully, fetched: %d\n",
bandwidth);
} else {
/* FIXME: error codes maybe? */
edac_printk(KERN_DEBUG, EDAC_MC,
"Scrub rate fetch FAILED, got: %d\n",
bandwidth);
}
} else {
/* FIXME: produce "not implemented" ERROR for user-side. */
edac_printk(KERN_WARNING, EDAC_MC,
"Memory scrubbing 'get' control is not implemented!\n");
}
return sprintf(data, "%d\n", bandwidth);
}
/* default attribute files for the MCI object */
static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
{
return sprintf(data,"%d\n", mci->ue_count);
}
static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
{
return sprintf(data,"%d\n", mci->ce_count);
}
static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
{
return sprintf(data,"%d\n", mci->ce_noinfo_count);
}
static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
{
return sprintf(data,"%d\n", mci->ue_noinfo_count);
}