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
10 * (c) 2012-2013 - Mauro Carvalho Chehab <mchehab@redhat.com>
11 * The entire API were re-written, and ported to use struct device
15 #include <linux/ctype.h>
16 #include <linux/slab.h>
17 #include <linux/edac.h>
18 #include <linux/bug.h>
19 #include <linux/pm_runtime.h>
20 #include <linux/uaccess.h>
22 #include "edac_core.h"
23 #include "edac_module.h"
25 /* MC EDAC Controls, setable by module parameter, and sysfs */
26 static int edac_mc_log_ue
= 1;
27 static int edac_mc_log_ce
= 1;
28 static int edac_mc_panic_on_ue
;
29 static int edac_mc_poll_msec
= 1000;
31 /* Getter functions for above */
32 int edac_mc_get_log_ue(void)
34 return edac_mc_log_ue
;
37 int edac_mc_get_log_ce(void)
39 return edac_mc_log_ce
;
42 int edac_mc_get_panic_on_ue(void)
44 return edac_mc_panic_on_ue
;
47 /* this is temporary */
48 int edac_mc_get_poll_msec(void)
50 return edac_mc_poll_msec
;
53 static int edac_set_poll_msec(const char *val
, struct kernel_param
*kp
)
61 ret
= strict_strtol(val
, 0, &l
);
62 if (ret
== -EINVAL
|| ((int)l
!= l
))
64 *((int *)kp
->arg
) = l
;
66 /* notify edac_mc engine to reset the poll period */
67 edac_mc_reset_delay_period(l
);
72 /* Parameter declarations for above */
73 module_param(edac_mc_panic_on_ue
, int, 0644);
74 MODULE_PARM_DESC(edac_mc_panic_on_ue
, "Panic on uncorrected error: 0=off 1=on");
75 module_param(edac_mc_log_ue
, int, 0644);
76 MODULE_PARM_DESC(edac_mc_log_ue
,
77 "Log uncorrectable error to console: 0=off 1=on");
78 module_param(edac_mc_log_ce
, int, 0644);
79 MODULE_PARM_DESC(edac_mc_log_ce
,
80 "Log correctable error to console: 0=off 1=on");
81 module_param_call(edac_mc_poll_msec
, edac_set_poll_msec
, param_get_int
,
82 &edac_mc_poll_msec
, 0644);
83 MODULE_PARM_DESC(edac_mc_poll_msec
, "Polling period in milliseconds");
85 static struct device
*mci_pdev
;
88 * various constants for Memory Controllers
90 static const char *mem_types
[] = {
91 [MEM_EMPTY
] = "Empty",
92 [MEM_RESERVED
] = "Reserved",
93 [MEM_UNKNOWN
] = "Unknown",
97 [MEM_SDR
] = "Unbuffered-SDR",
98 [MEM_RDR
] = "Registered-SDR",
99 [MEM_DDR
] = "Unbuffered-DDR",
100 [MEM_RDDR
] = "Registered-DDR",
102 [MEM_DDR2
] = "Unbuffered-DDR2",
103 [MEM_FB_DDR2
] = "FullyBuffered-DDR2",
104 [MEM_RDDR2
] = "Registered-DDR2",
106 [MEM_DDR3
] = "Unbuffered-DDR3",
107 [MEM_RDDR3
] = "Registered-DDR3"
110 static const char *dev_types
[] = {
111 [DEV_UNKNOWN
] = "Unknown",
121 static const char *edac_caps
[] = {
122 [EDAC_UNKNOWN
] = "Unknown",
123 [EDAC_NONE
] = "None",
124 [EDAC_RESERVED
] = "Reserved",
125 [EDAC_PARITY
] = "PARITY",
127 [EDAC_SECDED
] = "SECDED",
128 [EDAC_S2ECD2ED
] = "S2ECD2ED",
129 [EDAC_S4ECD4ED
] = "S4ECD4ED",
130 [EDAC_S8ECD8ED
] = "S8ECD8ED",
131 [EDAC_S16ECD16ED
] = "S16ECD16ED"
134 #ifdef CONFIG_EDAC_LEGACY_SYSFS
136 * EDAC sysfs CSROW data structures and methods
139 #define to_csrow(k) container_of(k, struct csrow_info, dev)
142 * We need it to avoid namespace conflicts between the legacy API
143 * and the per-dimm/per-rank one
145 #define DEVICE_ATTR_LEGACY(_name, _mode, _show, _store) \
146 static struct device_attribute dev_attr_legacy_##_name = __ATTR(_name, _mode, _show, _store)
148 struct dev_ch_attribute
{
149 struct device_attribute attr
;
153 #define DEVICE_CHANNEL(_name, _mode, _show, _store, _var) \
154 struct dev_ch_attribute dev_attr_legacy_##_name = \
155 { __ATTR(_name, _mode, _show, _store), (_var) }
157 #define to_channel(k) (container_of(k, struct dev_ch_attribute, attr)->channel)
159 /* Set of more default csrow<id> attribute show/store functions */
160 static ssize_t
csrow_ue_count_show(struct device
*dev
,
161 struct device_attribute
*mattr
, char *data
)
163 struct csrow_info
*csrow
= to_csrow(dev
);
165 return sprintf(data
, "%u\n", csrow
->ue_count
);
168 static ssize_t
csrow_ce_count_show(struct device
*dev
,
169 struct device_attribute
*mattr
, char *data
)
171 struct csrow_info
*csrow
= to_csrow(dev
);
173 return sprintf(data
, "%u\n", csrow
->ce_count
);
176 static ssize_t
csrow_size_show(struct device
*dev
,
177 struct device_attribute
*mattr
, char *data
)
179 struct csrow_info
*csrow
= to_csrow(dev
);
183 if (csrow
->mci
->csbased
)
184 return sprintf(data
, "%u\n", PAGES_TO_MiB(csrow
->nr_pages
));
186 for (i
= 0; i
< csrow
->nr_channels
; i
++)
187 nr_pages
+= csrow
->channels
[i
]->dimm
->nr_pages
;
188 return sprintf(data
, "%u\n", PAGES_TO_MiB(nr_pages
));
191 static ssize_t
csrow_mem_type_show(struct device
*dev
,
192 struct device_attribute
*mattr
, char *data
)
194 struct csrow_info
*csrow
= to_csrow(dev
);
196 return sprintf(data
, "%s\n", mem_types
[csrow
->channels
[0]->dimm
->mtype
]);
199 static ssize_t
csrow_dev_type_show(struct device
*dev
,
200 struct device_attribute
*mattr
, char *data
)
202 struct csrow_info
*csrow
= to_csrow(dev
);
204 return sprintf(data
, "%s\n", dev_types
[csrow
->channels
[0]->dimm
->dtype
]);
207 static ssize_t
csrow_edac_mode_show(struct device
*dev
,
208 struct device_attribute
*mattr
,
211 struct csrow_info
*csrow
= to_csrow(dev
);
213 return sprintf(data
, "%s\n", edac_caps
[csrow
->channels
[0]->dimm
->edac_mode
]);
216 /* show/store functions for DIMM Label attributes */
217 static ssize_t
channel_dimm_label_show(struct device
*dev
,
218 struct device_attribute
*mattr
,
221 struct csrow_info
*csrow
= to_csrow(dev
);
222 unsigned chan
= to_channel(mattr
);
223 struct rank_info
*rank
= csrow
->channels
[chan
];
225 /* if field has not been initialized, there is nothing to send */
226 if (!rank
->dimm
->label
[0])
229 return snprintf(data
, EDAC_MC_LABEL_LEN
, "%s\n",
233 static ssize_t
channel_dimm_label_store(struct device
*dev
,
234 struct device_attribute
*mattr
,
235 const char *data
, size_t count
)
237 struct csrow_info
*csrow
= to_csrow(dev
);
238 unsigned chan
= to_channel(mattr
);
239 struct rank_info
*rank
= csrow
->channels
[chan
];
241 ssize_t max_size
= 0;
243 max_size
= min((ssize_t
) count
, (ssize_t
) EDAC_MC_LABEL_LEN
- 1);
244 strncpy(rank
->dimm
->label
, data
, max_size
);
245 rank
->dimm
->label
[max_size
] = '\0';
250 /* show function for dynamic chX_ce_count attribute */
251 static ssize_t
channel_ce_count_show(struct device
*dev
,
252 struct device_attribute
*mattr
, char *data
)
254 struct csrow_info
*csrow
= to_csrow(dev
);
255 unsigned chan
= to_channel(mattr
);
256 struct rank_info
*rank
= csrow
->channels
[chan
];
258 return sprintf(data
, "%u\n", rank
->ce_count
);
261 /* cwrow<id>/attribute files */
262 DEVICE_ATTR_LEGACY(size_mb
, S_IRUGO
, csrow_size_show
, NULL
);
263 DEVICE_ATTR_LEGACY(dev_type
, S_IRUGO
, csrow_dev_type_show
, NULL
);
264 DEVICE_ATTR_LEGACY(mem_type
, S_IRUGO
, csrow_mem_type_show
, NULL
);
265 DEVICE_ATTR_LEGACY(edac_mode
, S_IRUGO
, csrow_edac_mode_show
, NULL
);
266 DEVICE_ATTR_LEGACY(ue_count
, S_IRUGO
, csrow_ue_count_show
, NULL
);
267 DEVICE_ATTR_LEGACY(ce_count
, S_IRUGO
, csrow_ce_count_show
, NULL
);
269 /* default attributes of the CSROW<id> object */
270 static struct attribute
*csrow_attrs
[] = {
271 &dev_attr_legacy_dev_type
.attr
,
272 &dev_attr_legacy_mem_type
.attr
,
273 &dev_attr_legacy_edac_mode
.attr
,
274 &dev_attr_legacy_size_mb
.attr
,
275 &dev_attr_legacy_ue_count
.attr
,
276 &dev_attr_legacy_ce_count
.attr
,
280 static struct attribute_group csrow_attr_grp
= {
281 .attrs
= csrow_attrs
,
284 static const struct attribute_group
*csrow_attr_groups
[] = {
289 static void csrow_attr_release(struct device
*dev
)
291 struct csrow_info
*csrow
= container_of(dev
, struct csrow_info
, dev
);
293 edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev
));
297 static struct device_type csrow_attr_type
= {
298 .groups
= csrow_attr_groups
,
299 .release
= csrow_attr_release
,
303 * possible dynamic channel DIMM Label attribute files
307 #define EDAC_NR_CHANNELS 6
309 DEVICE_CHANNEL(ch0_dimm_label
, S_IRUGO
| S_IWUSR
,
310 channel_dimm_label_show
, channel_dimm_label_store
, 0);
311 DEVICE_CHANNEL(ch1_dimm_label
, S_IRUGO
| S_IWUSR
,
312 channel_dimm_label_show
, channel_dimm_label_store
, 1);
313 DEVICE_CHANNEL(ch2_dimm_label
, S_IRUGO
| S_IWUSR
,
314 channel_dimm_label_show
, channel_dimm_label_store
, 2);
315 DEVICE_CHANNEL(ch3_dimm_label
, S_IRUGO
| S_IWUSR
,
316 channel_dimm_label_show
, channel_dimm_label_store
, 3);
317 DEVICE_CHANNEL(ch4_dimm_label
, S_IRUGO
| S_IWUSR
,
318 channel_dimm_label_show
, channel_dimm_label_store
, 4);
319 DEVICE_CHANNEL(ch5_dimm_label
, S_IRUGO
| S_IWUSR
,
320 channel_dimm_label_show
, channel_dimm_label_store
, 5);
322 /* Total possible dynamic DIMM Label attribute file table */
323 static struct device_attribute
*dynamic_csrow_dimm_attr
[] = {
324 &dev_attr_legacy_ch0_dimm_label
.attr
,
325 &dev_attr_legacy_ch1_dimm_label
.attr
,
326 &dev_attr_legacy_ch2_dimm_label
.attr
,
327 &dev_attr_legacy_ch3_dimm_label
.attr
,
328 &dev_attr_legacy_ch4_dimm_label
.attr
,
329 &dev_attr_legacy_ch5_dimm_label
.attr
332 /* possible dynamic channel ce_count attribute files */
333 DEVICE_CHANNEL(ch0_ce_count
, S_IRUGO
| S_IWUSR
,
334 channel_ce_count_show
, NULL
, 0);
335 DEVICE_CHANNEL(ch1_ce_count
, S_IRUGO
| S_IWUSR
,
336 channel_ce_count_show
, NULL
, 1);
337 DEVICE_CHANNEL(ch2_ce_count
, S_IRUGO
| S_IWUSR
,
338 channel_ce_count_show
, NULL
, 2);
339 DEVICE_CHANNEL(ch3_ce_count
, S_IRUGO
| S_IWUSR
,
340 channel_ce_count_show
, NULL
, 3);
341 DEVICE_CHANNEL(ch4_ce_count
, S_IRUGO
| S_IWUSR
,
342 channel_ce_count_show
, NULL
, 4);
343 DEVICE_CHANNEL(ch5_ce_count
, S_IRUGO
| S_IWUSR
,
344 channel_ce_count_show
, NULL
, 5);
346 /* Total possible dynamic ce_count attribute file table */
347 static struct device_attribute
*dynamic_csrow_ce_count_attr
[] = {
348 &dev_attr_legacy_ch0_ce_count
.attr
,
349 &dev_attr_legacy_ch1_ce_count
.attr
,
350 &dev_attr_legacy_ch2_ce_count
.attr
,
351 &dev_attr_legacy_ch3_ce_count
.attr
,
352 &dev_attr_legacy_ch4_ce_count
.attr
,
353 &dev_attr_legacy_ch5_ce_count
.attr
356 static inline int nr_pages_per_csrow(struct csrow_info
*csrow
)
358 int chan
, nr_pages
= 0;
360 for (chan
= 0; chan
< csrow
->nr_channels
; chan
++)
361 nr_pages
+= csrow
->channels
[chan
]->dimm
->nr_pages
;
366 /* Create a CSROW object under specifed edac_mc_device */
367 static int edac_create_csrow_object(struct mem_ctl_info
*mci
,
368 struct csrow_info
*csrow
, int index
)
372 if (csrow
->nr_channels
>= EDAC_NR_CHANNELS
)
375 csrow
->dev
.type
= &csrow_attr_type
;
376 csrow
->dev
.bus
= &mci
->bus
;
377 device_initialize(&csrow
->dev
);
378 csrow
->dev
.parent
= &mci
->dev
;
380 dev_set_name(&csrow
->dev
, "csrow%d", index
);
381 dev_set_drvdata(&csrow
->dev
, csrow
);
383 edac_dbg(0, "creating (virtual) csrow node %s\n",
384 dev_name(&csrow
->dev
));
386 err
= device_add(&csrow
->dev
);
390 for (chan
= 0; chan
< csrow
->nr_channels
; chan
++) {
391 /* Only expose populated DIMMs */
392 if (!csrow
->channels
[chan
]->dimm
->nr_pages
)
394 err
= device_create_file(&csrow
->dev
,
395 dynamic_csrow_dimm_attr
[chan
]);
398 err
= device_create_file(&csrow
->dev
,
399 dynamic_csrow_ce_count_attr
[chan
]);
401 device_remove_file(&csrow
->dev
,
402 dynamic_csrow_dimm_attr
[chan
]);
410 for (--chan
; chan
>= 0; chan
--) {
411 device_remove_file(&csrow
->dev
,
412 dynamic_csrow_dimm_attr
[chan
]);
413 device_remove_file(&csrow
->dev
,
414 dynamic_csrow_ce_count_attr
[chan
]);
416 put_device(&csrow
->dev
);
421 /* Create a CSROW object under specifed edac_mc_device */
422 static int edac_create_csrow_objects(struct mem_ctl_info
*mci
)
425 struct csrow_info
*csrow
;
427 for (i
= 0; i
< mci
->nr_csrows
; i
++) {
428 csrow
= mci
->csrows
[i
];
429 if (!nr_pages_per_csrow(csrow
))
431 err
= edac_create_csrow_object(mci
, mci
->csrows
[i
], i
);
434 "failure: create csrow objects for csrow %d\n",
442 for (--i
; i
>= 0; i
--) {
443 csrow
= mci
->csrows
[i
];
444 if (!nr_pages_per_csrow(csrow
))
446 for (chan
= csrow
->nr_channels
- 1; chan
>= 0; chan
--) {
447 if (!csrow
->channels
[chan
]->dimm
->nr_pages
)
449 device_remove_file(&csrow
->dev
,
450 dynamic_csrow_dimm_attr
[chan
]);
451 device_remove_file(&csrow
->dev
,
452 dynamic_csrow_ce_count_attr
[chan
]);
454 put_device(&mci
->csrows
[i
]->dev
);
460 static void edac_delete_csrow_objects(struct mem_ctl_info
*mci
)
463 struct csrow_info
*csrow
;
465 for (i
= mci
->nr_csrows
- 1; i
>= 0; i
--) {
466 csrow
= mci
->csrows
[i
];
467 if (!nr_pages_per_csrow(csrow
))
469 for (chan
= csrow
->nr_channels
- 1; chan
>= 0; chan
--) {
470 if (!csrow
->channels
[chan
]->dimm
->nr_pages
)
472 edac_dbg(1, "Removing csrow %d channel %d sysfs nodes\n",
474 device_remove_file(&csrow
->dev
,
475 dynamic_csrow_dimm_attr
[chan
]);
476 device_remove_file(&csrow
->dev
,
477 dynamic_csrow_ce_count_attr
[chan
]);
479 device_unregister(&mci
->csrows
[i
]->dev
);
485 * Per-dimm (or per-rank) devices
488 #define to_dimm(k) container_of(k, struct dimm_info, dev)
490 /* show/store functions for DIMM Label attributes */
491 static ssize_t
dimmdev_location_show(struct device
*dev
,
492 struct device_attribute
*mattr
, char *data
)
494 struct dimm_info
*dimm
= to_dimm(dev
);
496 return edac_dimm_info_location(dimm
, data
, PAGE_SIZE
);
499 static ssize_t
dimmdev_label_show(struct device
*dev
,
500 struct device_attribute
*mattr
, char *data
)
502 struct dimm_info
*dimm
= to_dimm(dev
);
504 /* if field has not been initialized, there is nothing to send */
508 return snprintf(data
, EDAC_MC_LABEL_LEN
, "%s\n", dimm
->label
);
511 static ssize_t
dimmdev_label_store(struct device
*dev
,
512 struct device_attribute
*mattr
,
516 struct dimm_info
*dimm
= to_dimm(dev
);
518 ssize_t max_size
= 0;
520 max_size
= min((ssize_t
) count
, (ssize_t
) EDAC_MC_LABEL_LEN
- 1);
521 strncpy(dimm
->label
, data
, max_size
);
522 dimm
->label
[max_size
] = '\0';
527 static ssize_t
dimmdev_size_show(struct device
*dev
,
528 struct device_attribute
*mattr
, char *data
)
530 struct dimm_info
*dimm
= to_dimm(dev
);
532 return sprintf(data
, "%u\n", PAGES_TO_MiB(dimm
->nr_pages
));
535 static ssize_t
dimmdev_mem_type_show(struct device
*dev
,
536 struct device_attribute
*mattr
, char *data
)
538 struct dimm_info
*dimm
= to_dimm(dev
);
540 return sprintf(data
, "%s\n", mem_types
[dimm
->mtype
]);
543 static ssize_t
dimmdev_dev_type_show(struct device
*dev
,
544 struct device_attribute
*mattr
, char *data
)
546 struct dimm_info
*dimm
= to_dimm(dev
);
548 return sprintf(data
, "%s\n", dev_types
[dimm
->dtype
]);
551 static ssize_t
dimmdev_edac_mode_show(struct device
*dev
,
552 struct device_attribute
*mattr
,
555 struct dimm_info
*dimm
= to_dimm(dev
);
557 return sprintf(data
, "%s\n", edac_caps
[dimm
->edac_mode
]);
560 /* dimm/rank attribute files */
561 static DEVICE_ATTR(dimm_label
, S_IRUGO
| S_IWUSR
,
562 dimmdev_label_show
, dimmdev_label_store
);
563 static DEVICE_ATTR(dimm_location
, S_IRUGO
, dimmdev_location_show
, NULL
);
564 static DEVICE_ATTR(size
, S_IRUGO
, dimmdev_size_show
, NULL
);
565 static DEVICE_ATTR(dimm_mem_type
, S_IRUGO
, dimmdev_mem_type_show
, NULL
);
566 static DEVICE_ATTR(dimm_dev_type
, S_IRUGO
, dimmdev_dev_type_show
, NULL
);
567 static DEVICE_ATTR(dimm_edac_mode
, S_IRUGO
, dimmdev_edac_mode_show
, NULL
);
569 /* attributes of the dimm<id>/rank<id> object */
570 static struct attribute
*dimm_attrs
[] = {
571 &dev_attr_dimm_label
.attr
,
572 &dev_attr_dimm_location
.attr
,
574 &dev_attr_dimm_mem_type
.attr
,
575 &dev_attr_dimm_dev_type
.attr
,
576 &dev_attr_dimm_edac_mode
.attr
,
580 static struct attribute_group dimm_attr_grp
= {
584 static const struct attribute_group
*dimm_attr_groups
[] = {
589 static void dimm_attr_release(struct device
*dev
)
591 struct dimm_info
*dimm
= container_of(dev
, struct dimm_info
, dev
);
593 edac_dbg(1, "Releasing dimm device %s\n", dev_name(dev
));
597 static struct device_type dimm_attr_type
= {
598 .groups
= dimm_attr_groups
,
599 .release
= dimm_attr_release
,
602 /* Create a DIMM object under specifed memory controller device */
603 static int edac_create_dimm_object(struct mem_ctl_info
*mci
,
604 struct dimm_info
*dimm
,
610 dimm
->dev
.type
= &dimm_attr_type
;
611 dimm
->dev
.bus
= &mci
->bus
;
612 device_initialize(&dimm
->dev
);
614 dimm
->dev
.parent
= &mci
->dev
;
615 if (mci
->mem_is_per_rank
)
616 dev_set_name(&dimm
->dev
, "rank%d", index
);
618 dev_set_name(&dimm
->dev
, "dimm%d", index
);
619 dev_set_drvdata(&dimm
->dev
, dimm
);
620 pm_runtime_forbid(&mci
->dev
);
622 err
= device_add(&dimm
->dev
);
624 edac_dbg(0, "creating rank/dimm device %s\n", dev_name(&dimm
->dev
));
630 * Memory controller device
633 #define to_mci(k) container_of(k, struct mem_ctl_info, dev)
635 static ssize_t
mci_reset_counters_store(struct device
*dev
,
636 struct device_attribute
*mattr
,
637 const char *data
, size_t count
)
639 struct mem_ctl_info
*mci
= to_mci(dev
);
640 int cnt
, row
, chan
, i
;
643 mci
->ue_noinfo_count
= 0;
644 mci
->ce_noinfo_count
= 0;
646 for (row
= 0; row
< mci
->nr_csrows
; row
++) {
647 struct csrow_info
*ri
= mci
->csrows
[row
];
652 for (chan
= 0; chan
< ri
->nr_channels
; chan
++)
653 ri
->channels
[chan
]->ce_count
= 0;
657 for (i
= 0; i
< mci
->n_layers
; i
++) {
658 cnt
*= mci
->layers
[i
].size
;
659 memset(mci
->ce_per_layer
[i
], 0, cnt
* sizeof(u32
));
660 memset(mci
->ue_per_layer
[i
], 0, cnt
* sizeof(u32
));
663 mci
->start_time
= jiffies
;
667 /* Memory scrubbing interface:
669 * A MC driver can limit the scrubbing bandwidth based on the CPU type.
670 * Therefore, ->set_sdram_scrub_rate should be made to return the actual
671 * bandwidth that is accepted or 0 when scrubbing is to be disabled.
673 * Negative value still means that an error has occurred while setting
676 static ssize_t
mci_sdram_scrub_rate_store(struct device
*dev
,
677 struct device_attribute
*mattr
,
678 const char *data
, size_t count
)
680 struct mem_ctl_info
*mci
= to_mci(dev
);
681 unsigned long bandwidth
= 0;
684 if (strict_strtoul(data
, 10, &bandwidth
) < 0)
687 new_bw
= mci
->set_sdram_scrub_rate(mci
, bandwidth
);
689 edac_printk(KERN_WARNING
, EDAC_MC
,
690 "Error setting scrub rate to: %lu\n", bandwidth
);
698 * ->get_sdram_scrub_rate() return value semantics same as above.
700 static ssize_t
mci_sdram_scrub_rate_show(struct device
*dev
,
701 struct device_attribute
*mattr
,
704 struct mem_ctl_info
*mci
= to_mci(dev
);
707 bandwidth
= mci
->get_sdram_scrub_rate(mci
);
709 edac_printk(KERN_DEBUG
, EDAC_MC
, "Error reading scrub rate\n");
713 return sprintf(data
, "%d\n", bandwidth
);
716 /* default attribute files for the MCI object */
717 static ssize_t
mci_ue_count_show(struct device
*dev
,
718 struct device_attribute
*mattr
,
721 struct mem_ctl_info
*mci
= to_mci(dev
);
723 return sprintf(data
, "%d\n", mci
->ue_mc
);
726 static ssize_t
mci_ce_count_show(struct device
*dev
,
727 struct device_attribute
*mattr
,
730 struct mem_ctl_info
*mci
= to_mci(dev
);
732 return sprintf(data
, "%d\n", mci
->ce_mc
);
735 static ssize_t
mci_ce_noinfo_show(struct device
*dev
,
736 struct device_attribute
*mattr
,
739 struct mem_ctl_info
*mci
= to_mci(dev
);
741 return sprintf(data
, "%d\n", mci
->ce_noinfo_count
);
744 static ssize_t
mci_ue_noinfo_show(struct device
*dev
,
745 struct device_attribute
*mattr
,
748 struct mem_ctl_info
*mci
= to_mci(dev
);
750 return sprintf(data
, "%d\n", mci
->ue_noinfo_count
);
753 static ssize_t
mci_seconds_show(struct device
*dev
,
754 struct device_attribute
*mattr
,
757 struct mem_ctl_info
*mci
= to_mci(dev
);
759 return sprintf(data
, "%ld\n", (jiffies
- mci
->start_time
) / HZ
);
762 static ssize_t
mci_ctl_name_show(struct device
*dev
,
763 struct device_attribute
*mattr
,
766 struct mem_ctl_info
*mci
= to_mci(dev
);
768 return sprintf(data
, "%s\n", mci
->ctl_name
);
771 static ssize_t
mci_size_mb_show(struct device
*dev
,
772 struct device_attribute
*mattr
,
775 struct mem_ctl_info
*mci
= to_mci(dev
);
776 int total_pages
= 0, csrow_idx
, j
;
778 for (csrow_idx
= 0; csrow_idx
< mci
->nr_csrows
; csrow_idx
++) {
779 struct csrow_info
*csrow
= mci
->csrows
[csrow_idx
];
781 if (csrow
->mci
->csbased
) {
782 total_pages
+= csrow
->nr_pages
;
784 for (j
= 0; j
< csrow
->nr_channels
; j
++) {
785 struct dimm_info
*dimm
= csrow
->channels
[j
]->dimm
;
787 total_pages
+= dimm
->nr_pages
;
792 return sprintf(data
, "%u\n", PAGES_TO_MiB(total_pages
));
795 static ssize_t
mci_max_location_show(struct device
*dev
,
796 struct device_attribute
*mattr
,
799 struct mem_ctl_info
*mci
= to_mci(dev
);
803 for (i
= 0; i
< mci
->n_layers
; i
++) {
804 p
+= sprintf(p
, "%s %d ",
805 edac_layer_name
[mci
->layers
[i
].type
],
806 mci
->layers
[i
].size
- 1);
812 #ifdef CONFIG_EDAC_DEBUG
813 static ssize_t
edac_fake_inject_write(struct file
*file
,
814 const char __user
*data
,
815 size_t count
, loff_t
*ppos
)
817 struct device
*dev
= file
->private_data
;
818 struct mem_ctl_info
*mci
= to_mci(dev
);
819 static enum hw_event_mc_err_type type
;
820 u16 errcount
= mci
->fake_inject_count
;
825 type
= mci
->fake_inject_ue
? HW_EVENT_ERR_UNCORRECTED
826 : HW_EVENT_ERR_CORRECTED
;
829 "Generating %d %s fake error%s to %d.%d.%d to test core handling. NOTE: this won't test the driver-specific decoding logic.\n",
831 (type
== HW_EVENT_ERR_UNCORRECTED
) ? "UE" : "CE",
832 errcount
> 1 ? "s" : "",
833 mci
->fake_inject_layer
[0],
834 mci
->fake_inject_layer
[1],
835 mci
->fake_inject_layer
[2]
837 edac_mc_handle_error(type
, mci
, errcount
, 0, 0, 0,
838 mci
->fake_inject_layer
[0],
839 mci
->fake_inject_layer
[1],
840 mci
->fake_inject_layer
[2],
841 "FAKE ERROR", "for EDAC testing only");
846 static const struct file_operations debug_fake_inject_fops
= {
848 .write
= edac_fake_inject_write
,
849 .llseek
= generic_file_llseek
,
853 /* default Control file */
854 DEVICE_ATTR(reset_counters
, S_IWUSR
, NULL
, mci_reset_counters_store
);
856 /* default Attribute files */
857 DEVICE_ATTR(mc_name
, S_IRUGO
, mci_ctl_name_show
, NULL
);
858 DEVICE_ATTR(size_mb
, S_IRUGO
, mci_size_mb_show
, NULL
);
859 DEVICE_ATTR(seconds_since_reset
, S_IRUGO
, mci_seconds_show
, NULL
);
860 DEVICE_ATTR(ue_noinfo_count
, S_IRUGO
, mci_ue_noinfo_show
, NULL
);
861 DEVICE_ATTR(ce_noinfo_count
, S_IRUGO
, mci_ce_noinfo_show
, NULL
);
862 DEVICE_ATTR(ue_count
, S_IRUGO
, mci_ue_count_show
, NULL
);
863 DEVICE_ATTR(ce_count
, S_IRUGO
, mci_ce_count_show
, NULL
);
864 DEVICE_ATTR(max_location
, S_IRUGO
, mci_max_location_show
, NULL
);
866 /* memory scrubber attribute file */
867 DEVICE_ATTR(sdram_scrub_rate
, 0, NULL
, NULL
);
869 static struct attribute
*mci_attrs
[] = {
870 &dev_attr_reset_counters
.attr
,
871 &dev_attr_mc_name
.attr
,
872 &dev_attr_size_mb
.attr
,
873 &dev_attr_seconds_since_reset
.attr
,
874 &dev_attr_ue_noinfo_count
.attr
,
875 &dev_attr_ce_noinfo_count
.attr
,
876 &dev_attr_ue_count
.attr
,
877 &dev_attr_ce_count
.attr
,
878 &dev_attr_max_location
.attr
,
882 static struct attribute_group mci_attr_grp
= {
886 static const struct attribute_group
*mci_attr_groups
[] = {
891 static void mci_attr_release(struct device
*dev
)
893 struct mem_ctl_info
*mci
= container_of(dev
, struct mem_ctl_info
, dev
);
895 edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev
));
899 static struct device_type mci_attr_type
= {
900 .groups
= mci_attr_groups
,
901 .release
= mci_attr_release
,
904 #ifdef CONFIG_EDAC_DEBUG
905 static struct dentry
*edac_debugfs
;
907 int __init
edac_debugfs_init(void)
909 edac_debugfs
= debugfs_create_dir("edac", NULL
);
910 if (IS_ERR(edac_debugfs
)) {
917 void __exit
edac_debugfs_exit(void)
919 debugfs_remove(edac_debugfs
);
922 int edac_create_debug_nodes(struct mem_ctl_info
*mci
)
924 struct dentry
*d
, *parent
;
931 d
= debugfs_create_dir(mci
->dev
.kobj
.name
, edac_debugfs
);
936 for (i
= 0; i
< mci
->n_layers
; i
++) {
937 sprintf(name
, "fake_inject_%s",
938 edac_layer_name
[mci
->layers
[i
].type
]);
939 d
= debugfs_create_u8(name
, S_IRUGO
| S_IWUSR
, parent
,
940 &mci
->fake_inject_layer
[i
]);
945 d
= debugfs_create_bool("fake_inject_ue", S_IRUGO
| S_IWUSR
, parent
,
946 &mci
->fake_inject_ue
);
950 d
= debugfs_create_u16("fake_inject_count", S_IRUGO
| S_IWUSR
, parent
,
951 &mci
->fake_inject_count
);
955 d
= debugfs_create_file("fake_inject", S_IWUSR
, parent
,
957 &debug_fake_inject_fops
);
961 mci
->debugfs
= parent
;
964 debugfs_remove(mci
->debugfs
);
970 * Create a new Memory Controller kobject instance,
971 * mc<id> under the 'mc' directory
977 int edac_create_sysfs_mci_device(struct mem_ctl_info
*mci
)
982 * The memory controller needs its own bus, in order to avoid
983 * namespace conflicts at /sys/bus/edac.
985 mci
->bus
.name
= kasprintf(GFP_KERNEL
, "mc%d", mci
->mc_idx
);
988 edac_dbg(0, "creating bus %s\n", mci
->bus
.name
);
989 err
= bus_register(&mci
->bus
);
993 /* get the /sys/devices/system/edac subsys reference */
994 mci
->dev
.type
= &mci_attr_type
;
995 device_initialize(&mci
->dev
);
997 mci
->dev
.parent
= mci_pdev
;
998 mci
->dev
.bus
= &mci
->bus
;
999 dev_set_name(&mci
->dev
, "mc%d", mci
->mc_idx
);
1000 dev_set_drvdata(&mci
->dev
, mci
);
1001 pm_runtime_forbid(&mci
->dev
);
1003 edac_dbg(0, "creating device %s\n", dev_name(&mci
->dev
));
1004 err
= device_add(&mci
->dev
);
1006 edac_dbg(1, "failure: create device %s\n", dev_name(&mci
->dev
));
1007 bus_unregister(&mci
->bus
);
1008 kfree(mci
->bus
.name
);
1012 if (mci
->set_sdram_scrub_rate
|| mci
->get_sdram_scrub_rate
) {
1013 if (mci
->get_sdram_scrub_rate
) {
1014 dev_attr_sdram_scrub_rate
.attr
.mode
|= S_IRUGO
;
1015 dev_attr_sdram_scrub_rate
.show
= &mci_sdram_scrub_rate_show
;
1017 if (mci
->set_sdram_scrub_rate
) {
1018 dev_attr_sdram_scrub_rate
.attr
.mode
|= S_IWUSR
;
1019 dev_attr_sdram_scrub_rate
.store
= &mci_sdram_scrub_rate_store
;
1021 err
= device_create_file(&mci
->dev
,
1022 &dev_attr_sdram_scrub_rate
);
1024 edac_dbg(1, "failure: create sdram_scrub_rate\n");
1029 * Create the dimm/rank devices
1031 for (i
= 0; i
< mci
->tot_dimms
; i
++) {
1032 struct dimm_info
*dimm
= mci
->dimms
[i
];
1033 /* Only expose populated DIMMs */
1034 if (dimm
->nr_pages
== 0)
1036 #ifdef CONFIG_EDAC_DEBUG
1037 edac_dbg(1, "creating dimm%d, located at ", i
);
1038 if (edac_debug_level
>= 1) {
1040 for (lay
= 0; lay
< mci
->n_layers
; lay
++)
1041 printk(KERN_CONT
"%s %d ",
1042 edac_layer_name
[mci
->layers
[lay
].type
],
1043 dimm
->location
[lay
]);
1044 printk(KERN_CONT
"\n");
1047 err
= edac_create_dimm_object(mci
, dimm
, i
);
1049 edac_dbg(1, "failure: create dimm %d obj\n", i
);
1054 #ifdef CONFIG_EDAC_LEGACY_SYSFS
1055 err
= edac_create_csrow_objects(mci
);
1060 #ifdef CONFIG_EDAC_DEBUG
1061 edac_create_debug_nodes(mci
);
1066 for (i
--; i
>= 0; i
--) {
1067 struct dimm_info
*dimm
= mci
->dimms
[i
];
1068 if (dimm
->nr_pages
== 0)
1070 device_unregister(&dimm
->dev
);
1073 device_unregister(&mci
->dev
);
1074 bus_unregister(&mci
->bus
);
1075 kfree(mci
->bus
.name
);
1080 * remove a Memory Controller instance
1082 void edac_remove_sysfs_mci_device(struct mem_ctl_info
*mci
)
1088 #ifdef CONFIG_EDAC_DEBUG
1089 debugfs_remove(mci
->debugfs
);
1091 #ifdef CONFIG_EDAC_LEGACY_SYSFS
1092 edac_delete_csrow_objects(mci
);
1095 for (i
= 0; i
< mci
->tot_dimms
; i
++) {
1096 struct dimm_info
*dimm
= mci
->dimms
[i
];
1097 if (dimm
->nr_pages
== 0)
1099 edac_dbg(0, "removing device %s\n", dev_name(&dimm
->dev
));
1100 device_unregister(&dimm
->dev
);
1104 void edac_unregister_sysfs(struct mem_ctl_info
*mci
)
1106 edac_dbg(1, "Unregistering device %s\n", dev_name(&mci
->dev
));
1107 device_unregister(&mci
->dev
);
1108 bus_unregister(&mci
->bus
);
1109 kfree(mci
->bus
.name
);
1112 static void mc_attr_release(struct device
*dev
)
1115 * There's no container structure here, as this is just the mci
1116 * parent device, used to create the /sys/devices/mc sysfs node.
1117 * So, there are no attributes on it.
1119 edac_dbg(1, "Releasing device %s\n", dev_name(dev
));
1123 static struct device_type mc_attr_type
= {
1124 .release
= mc_attr_release
,
1127 * Init/exit code for the module. Basically, creates/removes /sys/class/rc
1129 int __init
edac_mc_sysfs_init(void)
1131 struct bus_type
*edac_subsys
;
1134 /* get the /sys/devices/system/edac subsys reference */
1135 edac_subsys
= edac_get_sysfs_subsys();
1136 if (edac_subsys
== NULL
) {
1137 edac_dbg(1, "no edac_subsys\n");
1142 mci_pdev
= kzalloc(sizeof(*mci_pdev
), GFP_KERNEL
);
1148 mci_pdev
->bus
= edac_subsys
;
1149 mci_pdev
->type
= &mc_attr_type
;
1150 device_initialize(mci_pdev
);
1151 dev_set_name(mci_pdev
, "mc");
1153 err
= device_add(mci_pdev
);
1157 edac_dbg(0, "device %s created\n", dev_name(mci_pdev
));
1164 edac_put_sysfs_subsys();
1169 void __exit
edac_mc_sysfs_exit(void)
1171 device_unregister(mci_pdev
);
1172 edac_put_sysfs_subsys();