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/edac.h>
15 #include <linux/bug.h>
17 #include "edac_core.h"
18 #include "edac_module.h"
21 /* MC EDAC Controls, setable by module parameter, and sysfs */
22 static int edac_mc_log_ue
= 1;
23 static int edac_mc_log_ce
= 1;
24 static int edac_mc_panic_on_ue
;
25 static int edac_mc_poll_msec
= 1000;
27 /* Getter functions for above */
28 int edac_mc_get_log_ue(void)
30 return edac_mc_log_ue
;
33 int edac_mc_get_log_ce(void)
35 return edac_mc_log_ce
;
38 int edac_mc_get_panic_on_ue(void)
40 return edac_mc_panic_on_ue
;
43 /* this is temporary */
44 int edac_mc_get_poll_msec(void)
46 return edac_mc_poll_msec
;
49 static int edac_set_poll_msec(const char *val
, struct kernel_param
*kp
)
57 ret
= strict_strtol(val
, 0, &l
);
58 if (ret
== -EINVAL
|| ((int)l
!= l
))
60 *((int *)kp
->arg
) = l
;
62 /* notify edac_mc engine to reset the poll period */
63 edac_mc_reset_delay_period(l
);
68 /* Parameter declarations for above */
69 module_param(edac_mc_panic_on_ue
, int, 0644);
70 MODULE_PARM_DESC(edac_mc_panic_on_ue
, "Panic on uncorrected error: 0=off 1=on");
71 module_param(edac_mc_log_ue
, int, 0644);
72 MODULE_PARM_DESC(edac_mc_log_ue
,
73 "Log uncorrectable error to console: 0=off 1=on");
74 module_param(edac_mc_log_ce
, int, 0644);
75 MODULE_PARM_DESC(edac_mc_log_ce
,
76 "Log correctable error to console: 0=off 1=on");
77 module_param_call(edac_mc_poll_msec
, edac_set_poll_msec
, param_get_int
,
78 &edac_mc_poll_msec
, 0644);
79 MODULE_PARM_DESC(edac_mc_poll_msec
, "Polling period in milliseconds");
82 * various constants for Memory Controllers
84 static const char *mem_types
[] = {
85 [MEM_EMPTY
] = "Empty",
86 [MEM_RESERVED
] = "Reserved",
87 [MEM_UNKNOWN
] = "Unknown",
91 [MEM_SDR
] = "Unbuffered-SDR",
92 [MEM_RDR
] = "Registered-SDR",
93 [MEM_DDR
] = "Unbuffered-DDR",
94 [MEM_RDDR
] = "Registered-DDR",
96 [MEM_DDR2
] = "Unbuffered-DDR2",
97 [MEM_FB_DDR2
] = "FullyBuffered-DDR2",
98 [MEM_RDDR2
] = "Registered-DDR2",
100 [MEM_DDR3
] = "Unbuffered-DDR3",
101 [MEM_RDDR3
] = "Registered-DDR3"
104 static const char *dev_types
[] = {
105 [DEV_UNKNOWN
] = "Unknown",
115 static const char *edac_caps
[] = {
116 [EDAC_UNKNOWN
] = "Unknown",
117 [EDAC_NONE
] = "None",
118 [EDAC_RESERVED
] = "Reserved",
119 [EDAC_PARITY
] = "PARITY",
121 [EDAC_SECDED
] = "SECDED",
122 [EDAC_S2ECD2ED
] = "S2ECD2ED",
123 [EDAC_S4ECD4ED
] = "S4ECD4ED",
124 [EDAC_S8ECD8ED
] = "S8ECD8ED",
125 [EDAC_S16ECD16ED
] = "S16ECD16ED"
128 /* EDAC sysfs CSROW data structures and methods
131 /* Set of more default csrow<id> attribute show/store functions */
132 static ssize_t
csrow_ue_count_show(struct csrow_info
*csrow
, char *data
,
135 return sprintf(data
, "%u\n", csrow
->ue_count
);
138 static ssize_t
csrow_ce_count_show(struct csrow_info
*csrow
, char *data
,
141 return sprintf(data
, "%u\n", csrow
->ce_count
);
144 static ssize_t
csrow_size_show(struct csrow_info
*csrow
, char *data
,
147 return sprintf(data
, "%u\n", PAGES_TO_MiB(csrow
->nr_pages
));
150 static ssize_t
csrow_mem_type_show(struct csrow_info
*csrow
, char *data
,
153 return sprintf(data
, "%s\n", mem_types
[csrow
->mtype
]);
156 static ssize_t
csrow_dev_type_show(struct csrow_info
*csrow
, char *data
,
159 return sprintf(data
, "%s\n", dev_types
[csrow
->dtype
]);
162 static ssize_t
csrow_edac_mode_show(struct csrow_info
*csrow
, char *data
,
165 return sprintf(data
, "%s\n", edac_caps
[csrow
->edac_mode
]);
168 /* show/store functions for DIMM Label attributes */
169 static ssize_t
channel_dimm_label_show(struct csrow_info
*csrow
,
170 char *data
, int channel
)
172 /* if field has not been initialized, there is nothing to send */
173 if (!csrow
->channels
[channel
].label
[0])
176 return snprintf(data
, EDAC_MC_LABEL_LEN
, "%s\n",
177 csrow
->channels
[channel
].label
);
180 static ssize_t
channel_dimm_label_store(struct csrow_info
*csrow
,
182 size_t count
, int channel
)
184 ssize_t max_size
= 0;
186 max_size
= min((ssize_t
) count
, (ssize_t
) EDAC_MC_LABEL_LEN
- 1);
187 strncpy(csrow
->channels
[channel
].label
, data
, max_size
);
188 csrow
->channels
[channel
].label
[max_size
] = '\0';
193 /* show function for dynamic chX_ce_count attribute */
194 static ssize_t
channel_ce_count_show(struct csrow_info
*csrow
,
195 char *data
, int channel
)
197 return sprintf(data
, "%u\n", csrow
->channels
[channel
].ce_count
);
200 /* csrow specific attribute structure */
201 struct csrowdev_attribute
{
202 struct attribute attr
;
203 ssize_t(*show
) (struct csrow_info
*, char *, int);
204 ssize_t(*store
) (struct csrow_info
*, const char *, size_t, int);
208 #define to_csrow(k) container_of(k, struct csrow_info, kobj)
209 #define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
211 /* Set of show/store higher level functions for default csrow attributes */
212 static ssize_t
csrowdev_show(struct kobject
*kobj
,
213 struct attribute
*attr
, char *buffer
)
215 struct csrow_info
*csrow
= to_csrow(kobj
);
216 struct csrowdev_attribute
*csrowdev_attr
= to_csrowdev_attr(attr
);
218 if (csrowdev_attr
->show
)
219 return csrowdev_attr
->show(csrow
,
220 buffer
, csrowdev_attr
->private);
224 static ssize_t
csrowdev_store(struct kobject
*kobj
, struct attribute
*attr
,
225 const char *buffer
, size_t count
)
227 struct csrow_info
*csrow
= to_csrow(kobj
);
228 struct csrowdev_attribute
*csrowdev_attr
= to_csrowdev_attr(attr
);
230 if (csrowdev_attr
->store
)
231 return csrowdev_attr
->store(csrow
,
233 count
, csrowdev_attr
->private);
237 static const struct sysfs_ops csrowfs_ops
= {
238 .show
= csrowdev_show
,
239 .store
= csrowdev_store
242 #define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \
243 static struct csrowdev_attribute attr_##_name = { \
244 .attr = {.name = __stringify(_name), .mode = _mode }, \
247 .private = _private, \
250 /* default cwrow<id>/attribute files */
251 CSROWDEV_ATTR(size_mb
, S_IRUGO
, csrow_size_show
, NULL
, 0);
252 CSROWDEV_ATTR(dev_type
, S_IRUGO
, csrow_dev_type_show
, NULL
, 0);
253 CSROWDEV_ATTR(mem_type
, S_IRUGO
, csrow_mem_type_show
, NULL
, 0);
254 CSROWDEV_ATTR(edac_mode
, S_IRUGO
, csrow_edac_mode_show
, NULL
, 0);
255 CSROWDEV_ATTR(ue_count
, S_IRUGO
, csrow_ue_count_show
, NULL
, 0);
256 CSROWDEV_ATTR(ce_count
, S_IRUGO
, csrow_ce_count_show
, NULL
, 0);
258 /* default attributes of the CSROW<id> object */
259 static struct csrowdev_attribute
*default_csrow_attr
[] = {
269 /* possible dynamic channel DIMM Label attribute files */
270 CSROWDEV_ATTR(ch0_dimm_label
, S_IRUGO
| S_IWUSR
,
271 channel_dimm_label_show
, channel_dimm_label_store
, 0);
272 CSROWDEV_ATTR(ch1_dimm_label
, S_IRUGO
| S_IWUSR
,
273 channel_dimm_label_show
, channel_dimm_label_store
, 1);
274 CSROWDEV_ATTR(ch2_dimm_label
, S_IRUGO
| S_IWUSR
,
275 channel_dimm_label_show
, channel_dimm_label_store
, 2);
276 CSROWDEV_ATTR(ch3_dimm_label
, S_IRUGO
| S_IWUSR
,
277 channel_dimm_label_show
, channel_dimm_label_store
, 3);
278 CSROWDEV_ATTR(ch4_dimm_label
, S_IRUGO
| S_IWUSR
,
279 channel_dimm_label_show
, channel_dimm_label_store
, 4);
280 CSROWDEV_ATTR(ch5_dimm_label
, S_IRUGO
| S_IWUSR
,
281 channel_dimm_label_show
, channel_dimm_label_store
, 5);
283 /* Total possible dynamic DIMM Label attribute file table */
284 static struct csrowdev_attribute
*dynamic_csrow_dimm_attr
[] = {
285 &attr_ch0_dimm_label
,
286 &attr_ch1_dimm_label
,
287 &attr_ch2_dimm_label
,
288 &attr_ch3_dimm_label
,
289 &attr_ch4_dimm_label
,
293 /* possible dynamic channel ce_count attribute files */
294 CSROWDEV_ATTR(ch0_ce_count
, S_IRUGO
| S_IWUSR
, channel_ce_count_show
, NULL
, 0);
295 CSROWDEV_ATTR(ch1_ce_count
, S_IRUGO
| S_IWUSR
, channel_ce_count_show
, NULL
, 1);
296 CSROWDEV_ATTR(ch2_ce_count
, S_IRUGO
| S_IWUSR
, channel_ce_count_show
, NULL
, 2);
297 CSROWDEV_ATTR(ch3_ce_count
, S_IRUGO
| S_IWUSR
, channel_ce_count_show
, NULL
, 3);
298 CSROWDEV_ATTR(ch4_ce_count
, S_IRUGO
| S_IWUSR
, channel_ce_count_show
, NULL
, 4);
299 CSROWDEV_ATTR(ch5_ce_count
, S_IRUGO
| S_IWUSR
, channel_ce_count_show
, NULL
, 5);
301 /* Total possible dynamic ce_count attribute file table */
302 static struct csrowdev_attribute
*dynamic_csrow_ce_count_attr
[] = {
311 #define EDAC_NR_CHANNELS 6
313 /* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */
314 static int edac_create_channel_files(struct kobject
*kobj
, int chan
)
318 if (chan
>= EDAC_NR_CHANNELS
)
321 /* create the DIMM label attribute file */
322 err
= sysfs_create_file(kobj
,
324 dynamic_csrow_dimm_attr
[chan
]);
327 /* create the CE Count attribute file */
328 err
= sysfs_create_file(kobj
,
330 dynamic_csrow_ce_count_attr
[chan
]);
332 debugf1("%s() dimm labels and ce_count files created",
339 /* No memory to release for this kobj */
340 static void edac_csrow_instance_release(struct kobject
*kobj
)
342 struct mem_ctl_info
*mci
;
343 struct csrow_info
*cs
;
345 debugf1("%s()\n", __func__
);
347 cs
= container_of(kobj
, struct csrow_info
, kobj
);
350 kobject_put(&mci
->edac_mci_kobj
);
353 /* the kobj_type instance for a CSROW */
354 static struct kobj_type ktype_csrow
= {
355 .release
= edac_csrow_instance_release
,
356 .sysfs_ops
= &csrowfs_ops
,
357 .default_attrs
= (struct attribute
**)default_csrow_attr
,
360 /* Create a CSROW object under specifed edac_mc_device */
361 static int edac_create_csrow_object(struct mem_ctl_info
*mci
,
362 struct csrow_info
*csrow
, int index
)
364 struct kobject
*kobj_mci
= &mci
->edac_mci_kobj
;
365 struct kobject
*kobj
;
369 /* generate ..../edac/mc/mc<id>/csrow<index> */
370 memset(&csrow
->kobj
, 0, sizeof(csrow
->kobj
));
371 csrow
->mci
= mci
; /* include container up link */
373 /* bump the mci instance's kobject's ref count */
374 kobj
= kobject_get(&mci
->edac_mci_kobj
);
380 /* Instanstiate the csrow object */
381 err
= kobject_init_and_add(&csrow
->kobj
, &ktype_csrow
, kobj_mci
,
384 goto err_release_top_kobj
;
386 /* At this point, to release a csrow kobj, one must
387 * call the kobject_put and allow that tear down
388 * to work the releasing
391 /* Create the dyanmic attribute files on this csrow,
392 * namely, the DIMM labels and the channel ce_count
394 for (chan
= 0; chan
< csrow
->nr_channels
; chan
++) {
395 err
= edac_create_channel_files(&csrow
->kobj
, chan
);
397 /* special case the unregister here */
398 kobject_put(&csrow
->kobj
);
402 kobject_uevent(&csrow
->kobj
, KOBJ_ADD
);
405 /* error unwind stack */
406 err_release_top_kobj
:
407 kobject_put(&mci
->edac_mci_kobj
);
413 /* default sysfs methods and data structures for the main MCI kobject */
415 static ssize_t
mci_reset_counters_store(struct mem_ctl_info
*mci
,
416 const char *data
, size_t count
)
420 mci
->ue_noinfo_count
= 0;
421 mci
->ce_noinfo_count
= 0;
425 for (row
= 0; row
< mci
->nr_csrows
; row
++) {
426 struct csrow_info
*ri
= &mci
->csrows
[row
];
431 for (chan
= 0; chan
< ri
->nr_channels
; chan
++)
432 ri
->channels
[chan
].ce_count
= 0;
435 mci
->start_time
= jiffies
;
439 /* memory scrubbing */
440 static ssize_t
mci_sdram_scrub_rate_store(struct mem_ctl_info
*mci
,
441 const char *data
, size_t count
)
443 unsigned long bandwidth
= 0;
446 if (!mci
->set_sdram_scrub_rate
) {
447 edac_printk(KERN_WARNING
, EDAC_MC
,
448 "Memory scrub rate setting not implemented!\n");
452 if (strict_strtoul(data
, 10, &bandwidth
) < 0)
455 err
= mci
->set_sdram_scrub_rate(mci
, (u32
)bandwidth
);
457 edac_printk(KERN_DEBUG
, EDAC_MC
,
458 "Failed setting scrub rate to %lu\n", bandwidth
);
462 edac_printk(KERN_DEBUG
, EDAC_MC
,
463 "Scrub rate set to: %lu\n", bandwidth
);
468 static ssize_t
mci_sdram_scrub_rate_show(struct mem_ctl_info
*mci
, char *data
)
473 if (!mci
->get_sdram_scrub_rate
) {
474 edac_printk(KERN_WARNING
, EDAC_MC
,
475 "Memory scrub rate reading not implemented\n");
479 err
= mci
->get_sdram_scrub_rate(mci
, &bandwidth
);
481 edac_printk(KERN_DEBUG
, EDAC_MC
, "Error reading scrub rate\n");
485 edac_printk(KERN_DEBUG
, EDAC_MC
,
486 "Read scrub rate: %d\n", bandwidth
);
487 return sprintf(data
, "%d\n", bandwidth
);
491 /* default attribute files for the MCI object */
492 static ssize_t
mci_ue_count_show(struct mem_ctl_info
*mci
, char *data
)
494 return sprintf(data
, "%d\n", mci
->ue_count
);
497 static ssize_t
mci_ce_count_show(struct mem_ctl_info
*mci
, char *data
)
499 return sprintf(data
, "%d\n", mci
->ce_count
);
502 static ssize_t
mci_ce_noinfo_show(struct mem_ctl_info
*mci
, char *data
)
504 return sprintf(data
, "%d\n", mci
->ce_noinfo_count
);
507 static ssize_t
mci_ue_noinfo_show(struct mem_ctl_info
*mci
, char *data
)
509 return sprintf(data
, "%d\n", mci
->ue_noinfo_count
);
512 static ssize_t
mci_seconds_show(struct mem_ctl_info
*mci
, char *data
)
514 return sprintf(data
, "%ld\n", (jiffies
- mci
->start_time
) / HZ
);
517 static ssize_t
mci_ctl_name_show(struct mem_ctl_info
*mci
, char *data
)
519 return sprintf(data
, "%s\n", mci
->ctl_name
);
522 static ssize_t
mci_size_mb_show(struct mem_ctl_info
*mci
, char *data
)
524 int total_pages
, csrow_idx
;
526 for (total_pages
= csrow_idx
= 0; csrow_idx
< mci
->nr_csrows
;
528 struct csrow_info
*csrow
= &mci
->csrows
[csrow_idx
];
530 if (!csrow
->nr_pages
)
533 total_pages
+= csrow
->nr_pages
;
536 return sprintf(data
, "%u\n", PAGES_TO_MiB(total_pages
));
539 #define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
540 #define to_mcidev_attr(a) container_of(a,struct mcidev_sysfs_attribute,attr)
542 /* MCI show/store functions for top most object */
543 static ssize_t
mcidev_show(struct kobject
*kobj
, struct attribute
*attr
,
546 struct mem_ctl_info
*mem_ctl_info
= to_mci(kobj
);
547 struct mcidev_sysfs_attribute
*mcidev_attr
= to_mcidev_attr(attr
);
549 debugf1("%s() mem_ctl_info %p\n", __func__
, mem_ctl_info
);
551 if (mcidev_attr
->show
)
552 return mcidev_attr
->show(mem_ctl_info
, buffer
);
557 static ssize_t
mcidev_store(struct kobject
*kobj
, struct attribute
*attr
,
558 const char *buffer
, size_t count
)
560 struct mem_ctl_info
*mem_ctl_info
= to_mci(kobj
);
561 struct mcidev_sysfs_attribute
*mcidev_attr
= to_mcidev_attr(attr
);
563 debugf1("%s() mem_ctl_info %p\n", __func__
, mem_ctl_info
);
565 if (mcidev_attr
->store
)
566 return mcidev_attr
->store(mem_ctl_info
, buffer
, count
);
571 /* Intermediate show/store table */
572 static const struct sysfs_ops mci_ops
= {
574 .store
= mcidev_store
577 #define MCIDEV_ATTR(_name,_mode,_show,_store) \
578 static struct mcidev_sysfs_attribute mci_attr_##_name = { \
579 .attr = {.name = __stringify(_name), .mode = _mode }, \
584 /* default Control file */
585 MCIDEV_ATTR(reset_counters
, S_IWUSR
, NULL
, mci_reset_counters_store
);
587 /* default Attribute files */
588 MCIDEV_ATTR(mc_name
, S_IRUGO
, mci_ctl_name_show
, NULL
);
589 MCIDEV_ATTR(size_mb
, S_IRUGO
, mci_size_mb_show
, NULL
);
590 MCIDEV_ATTR(seconds_since_reset
, S_IRUGO
, mci_seconds_show
, NULL
);
591 MCIDEV_ATTR(ue_noinfo_count
, S_IRUGO
, mci_ue_noinfo_show
, NULL
);
592 MCIDEV_ATTR(ce_noinfo_count
, S_IRUGO
, mci_ce_noinfo_show
, NULL
);
593 MCIDEV_ATTR(ue_count
, S_IRUGO
, mci_ue_count_show
, NULL
);
594 MCIDEV_ATTR(ce_count
, S_IRUGO
, mci_ce_count_show
, NULL
);
596 /* memory scrubber attribute file */
597 MCIDEV_ATTR(sdram_scrub_rate
, S_IRUGO
| S_IWUSR
, mci_sdram_scrub_rate_show
,
598 mci_sdram_scrub_rate_store
);
600 static struct mcidev_sysfs_attribute
*mci_attr
[] = {
601 &mci_attr_reset_counters
,
604 &mci_attr_seconds_since_reset
,
605 &mci_attr_ue_noinfo_count
,
606 &mci_attr_ce_noinfo_count
,
609 &mci_attr_sdram_scrub_rate
,
615 * Release of a MC controlling instance
617 * each MC control instance has the following resources upon entry:
618 * a) a ref count on the top memctl kobj
619 * b) a ref count on this module
621 * this function must decrement those ref counts and then
622 * issue a free on the instance's memory
624 static void edac_mci_control_release(struct kobject
*kobj
)
626 struct mem_ctl_info
*mci
;
630 debugf0("%s() mci instance idx=%d releasing\n", __func__
, mci
->mc_idx
);
632 /* decrement the module ref count */
633 module_put(mci
->owner
);
636 static struct kobj_type ktype_mci
= {
637 .release
= edac_mci_control_release
,
638 .sysfs_ops
= &mci_ops
,
639 .default_attrs
= (struct attribute
**)mci_attr
,
642 /* EDAC memory controller sysfs kset:
643 * /sys/devices/system/edac/mc
645 static struct kset
*mc_kset
;
648 * edac_mc_register_sysfs_main_kobj
650 * setups and registers the main kobject for each mci
652 int edac_mc_register_sysfs_main_kobj(struct mem_ctl_info
*mci
)
654 struct kobject
*kobj_mci
;
657 debugf1("%s()\n", __func__
);
659 kobj_mci
= &mci
->edac_mci_kobj
;
661 /* Init the mci's kobject */
662 memset(kobj_mci
, 0, sizeof(*kobj_mci
));
664 /* Record which module 'owns' this control structure
665 * and bump the ref count of the module
667 mci
->owner
= THIS_MODULE
;
669 /* bump ref count on this module */
670 if (!try_module_get(mci
->owner
)) {
675 /* this instance become part of the mc_kset */
676 kobj_mci
->kset
= mc_kset
;
678 /* register the mc<id> kobject to the mc_kset */
679 err
= kobject_init_and_add(kobj_mci
, &ktype_mci
, NULL
,
680 "mc%d", mci
->mc_idx
);
682 debugf1("%s()Failed to register '.../edac/mc%d'\n",
683 __func__
, mci
->mc_idx
);
686 kobject_uevent(kobj_mci
, KOBJ_ADD
);
688 /* At this point, to 'free' the control struct,
689 * edac_mc_unregister_sysfs_main_kobj() must be used
692 debugf1("%s() Registered '.../edac/mc%d' kobject\n",
693 __func__
, mci
->mc_idx
);
697 /* Error exit stack */
700 module_put(mci
->owner
);
707 * edac_mc_register_sysfs_main_kobj
709 * tears down and the main mci kobject from the mc_kset
711 void edac_mc_unregister_sysfs_main_kobj(struct mem_ctl_info
*mci
)
713 debugf1("%s()\n", __func__
);
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
,
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
);
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
);
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
);
764 /* Intermediate show/store table */
765 static struct sysfs_ops inst_grp_ops
= {
766 .show
= inst_grp_show
,
767 .store
= inst_grp_store
770 /* the kobj_type instance for a instance group */
771 static struct kobj_type ktype_inst_grp
= {
772 .release
= edac_inst_grp_release
,
773 .sysfs_ops
= &inst_grp_ops
,
778 * edac_create_mci_instance_attributes
779 * create MC driver specific attributes bellow an specified kobj
780 * This routine calls itself recursively, in order to create an entire
783 static int edac_create_mci_instance_attributes(struct mem_ctl_info
*mci
,
784 const struct mcidev_sysfs_attribute
*sysfs_attrib
,
785 struct kobject
*kobj
)
789 debugf1("%s()\n", __func__
);
791 while (sysfs_attrib
) {
792 debugf1("%s() sysfs_attrib = %p\n",__func__
, sysfs_attrib
);
793 if (sysfs_attrib
->grp
) {
794 struct mcidev_sysfs_group_kobj
*grp_kobj
;
796 grp_kobj
= kzalloc(sizeof(*grp_kobj
), GFP_KERNEL
);
800 grp_kobj
->grp
= sysfs_attrib
->grp
;
802 list_add_tail(&grp_kobj
->list
, &mci
->grp_kobj_list
);
804 debugf0("%s() grp %s, mci %p\n", __func__
,
805 sysfs_attrib
->grp
->name
, mci
);
807 err
= kobject_init_and_add(&grp_kobj
->kobj
,
810 sysfs_attrib
->grp
->name
);
812 printk(KERN_ERR
"kobject_init_and_add failed: %d\n", err
);
815 err
= edac_create_mci_instance_attributes(mci
,
816 grp_kobj
->grp
->mcidev_attr
,
821 } else if (sysfs_attrib
->attr
.name
) {
822 debugf0("%s() file %s\n", __func__
,
823 sysfs_attrib
->attr
.name
);
825 err
= sysfs_create_file(kobj
, &sysfs_attrib
->attr
);
827 printk(KERN_ERR
"sysfs_create_file failed: %d\n", err
);
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 const 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 debugf1("%s() sysfs_attrib = %p\n",__func__
, sysfs_attrib
);
858 if (sysfs_attrib
->grp
) {
859 debugf1("%s() seeking for group %s\n",
860 __func__
, sysfs_attrib
->grp
->name
);
861 list_for_each_entry(grp_kobj
,
862 &mci
->grp_kobj_list
, list
) {
863 debugf1("%s() grp_kobj->grp = %p\n",__func__
, grp_kobj
->grp
);
864 if (grp_kobj
->grp
== sysfs_attrib
->grp
) {
865 edac_remove_mci_instance_attributes(mci
,
866 grp_kobj
->grp
->mcidev_attr
,
867 &grp_kobj
->kobj
, count
+ 1);
868 debugf0("%s() group %s\n", __func__
,
869 sysfs_attrib
->grp
->name
);
870 kobject_put(&grp_kobj
->kobj
);
873 debugf1("%s() end of seeking for group %s\n",
874 __func__
, sysfs_attrib
->grp
->name
);
875 } else if (sysfs_attrib
->attr
.name
) {
876 debugf0("%s() file %s\n", __func__
,
877 sysfs_attrib
->attr
.name
);
878 sysfs_remove_file(kobj
, &sysfs_attrib
->attr
);
884 /* Remove the group objects */
887 list_for_each_entry_safe(grp_kobj
, tmp
,
888 &mci
->grp_kobj_list
, list
) {
889 list_del(&grp_kobj
->list
);
896 * Create a new Memory Controller kobject instance,
897 * mc<id> under the 'mc' directory
903 int edac_create_sysfs_mci_device(struct mem_ctl_info
*mci
)
907 struct csrow_info
*csrow
;
908 struct kobject
*kobj_mci
= &mci
->edac_mci_kobj
;
910 debugf0("%s() idx=%d\n", __func__
, mci
->mc_idx
);
912 INIT_LIST_HEAD(&mci
->grp_kobj_list
);
914 /* create a symlink for the device */
915 err
= sysfs_create_link(kobj_mci
, &mci
->dev
->kobj
,
916 EDAC_DEVICE_SYMLINK
);
918 debugf1("%s() failure to create symlink\n", __func__
);
922 /* If the low level driver desires some attributes,
923 * then create them now for the driver.
925 if (mci
->mc_driver_sysfs_attributes
) {
926 err
= edac_create_mci_instance_attributes(mci
,
927 mci
->mc_driver_sysfs_attributes
,
928 &mci
->edac_mci_kobj
);
930 debugf1("%s() failure to create mci attributes\n",
936 /* Make directories for each CSROW object under the mc<id> kobject
938 for (i
= 0; i
< mci
->nr_csrows
; i
++) {
939 csrow
= &mci
->csrows
[i
];
941 /* Only expose populated CSROWs */
942 if (csrow
->nr_pages
> 0) {
943 err
= edac_create_csrow_object(mci
, csrow
, i
);
945 debugf1("%s() failure: create csrow %d obj\n",
954 /* CSROW error: backout what has already been registered, */
956 for (i
--; i
>= 0; i
--) {
957 if (csrow
->nr_pages
> 0) {
958 kobject_put(&mci
->csrows
[i
].kobj
);
962 /* remove the mci instance's attributes, if any */
963 edac_remove_mci_instance_attributes(mci
,
964 mci
->mc_driver_sysfs_attributes
, &mci
->edac_mci_kobj
, 0);
966 /* remove the symlink */
967 sysfs_remove_link(kobj_mci
, EDAC_DEVICE_SYMLINK
);
974 * remove a Memory Controller instance
976 void edac_remove_sysfs_mci_device(struct mem_ctl_info
*mci
)
980 debugf0("%s()\n", __func__
);
982 /* remove all csrow kobjects */
983 debugf0("%s() unregister this mci kobj\n", __func__
);
984 for (i
= 0; i
< mci
->nr_csrows
; i
++) {
985 if (mci
->csrows
[i
].nr_pages
> 0) {
986 debugf0("%s() unreg csrow-%d\n", __func__
, i
);
987 kobject_put(&mci
->csrows
[i
].kobj
);
991 /* remove this mci instance's attribtes */
992 if (mci
->mc_driver_sysfs_attributes
) {
993 debugf0("%s() unregister mci private attributes\n", __func__
);
994 edac_remove_mci_instance_attributes(mci
,
995 mci
->mc_driver_sysfs_attributes
,
996 &mci
->edac_mci_kobj
, 0);
999 /* remove the symlink */
1000 debugf0("%s() remove_link\n", __func__
);
1001 sysfs_remove_link(&mci
->edac_mci_kobj
, EDAC_DEVICE_SYMLINK
);
1003 /* unregister this instance's kobject */
1004 debugf0("%s() remove_mci_instance\n", __func__
);
1005 kobject_put(&mci
->edac_mci_kobj
);
1012 * edac_setup_sysfs_mc_kset(void)
1014 * Initialize the mc_kset for the 'mc' entry
1015 * This requires creating the top 'mc' directory with a kset
1016 * and its controls/attributes.
1018 * To this 'mc' kset, instance 'mci' will be grouped as children.
1021 * !0 FAILURE error code
1023 int edac_sysfs_setup_mc_kset(void)
1026 struct sysdev_class
*edac_class
;
1028 debugf1("%s()\n", __func__
);
1030 /* get the /sys/devices/system/edac class reference */
1031 edac_class
= edac_get_sysfs_class();
1032 if (edac_class
== NULL
) {
1033 debugf1("%s() no edac_class error=%d\n", __func__
, err
);
1037 /* Init the MC's kobject */
1038 mc_kset
= kset_create_and_add("mc", NULL
, &edac_class
->kset
.kobj
);
1041 debugf1("%s() Failed to register '.../edac/mc'\n", __func__
);
1045 debugf1("%s() Registered '.../edac/mc' kobject\n", __func__
);
1050 edac_put_sysfs_class();
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
);
1064 edac_put_sysfs_class();