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 - 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 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 for (i
= 0; i
< csrow
->nr_channels
; i
++)
184 nr_pages
+= csrow
->channels
[i
]->dimm
->nr_pages
;
185 return sprintf(data
, "%u\n", PAGES_TO_MiB(nr_pages
));
188 static ssize_t
csrow_mem_type_show(struct device
*dev
,
189 struct device_attribute
*mattr
, char *data
)
191 struct csrow_info
*csrow
= to_csrow(dev
);
193 return sprintf(data
, "%s\n", mem_types
[csrow
->channels
[0]->dimm
->mtype
]);
196 static ssize_t
csrow_dev_type_show(struct device
*dev
,
197 struct device_attribute
*mattr
, char *data
)
199 struct csrow_info
*csrow
= to_csrow(dev
);
201 return sprintf(data
, "%s\n", dev_types
[csrow
->channels
[0]->dimm
->dtype
]);
204 static ssize_t
csrow_edac_mode_show(struct device
*dev
,
205 struct device_attribute
*mattr
,
208 struct csrow_info
*csrow
= to_csrow(dev
);
210 return sprintf(data
, "%s\n", edac_caps
[csrow
->channels
[0]->dimm
->edac_mode
]);
213 /* show/store functions for DIMM Label attributes */
214 static ssize_t
channel_dimm_label_show(struct device
*dev
,
215 struct device_attribute
*mattr
,
218 struct csrow_info
*csrow
= to_csrow(dev
);
219 unsigned chan
= to_channel(mattr
);
220 struct rank_info
*rank
= csrow
->channels
[chan
];
222 /* if field has not been initialized, there is nothing to send */
223 if (!rank
->dimm
->label
[0])
226 return snprintf(data
, EDAC_MC_LABEL_LEN
, "%s\n",
230 static ssize_t
channel_dimm_label_store(struct device
*dev
,
231 struct device_attribute
*mattr
,
232 const char *data
, size_t count
)
234 struct csrow_info
*csrow
= to_csrow(dev
);
235 unsigned chan
= to_channel(mattr
);
236 struct rank_info
*rank
= csrow
->channels
[chan
];
238 ssize_t max_size
= 0;
240 max_size
= min((ssize_t
) count
, (ssize_t
) EDAC_MC_LABEL_LEN
- 1);
241 strncpy(rank
->dimm
->label
, data
, max_size
);
242 rank
->dimm
->label
[max_size
] = '\0';
247 /* show function for dynamic chX_ce_count attribute */
248 static ssize_t
channel_ce_count_show(struct device
*dev
,
249 struct device_attribute
*mattr
, char *data
)
251 struct csrow_info
*csrow
= to_csrow(dev
);
252 unsigned chan
= to_channel(mattr
);
253 struct rank_info
*rank
= csrow
->channels
[chan
];
255 return sprintf(data
, "%u\n", rank
->ce_count
);
258 /* cwrow<id>/attribute files */
259 DEVICE_ATTR_LEGACY(size_mb
, S_IRUGO
, csrow_size_show
, NULL
);
260 DEVICE_ATTR_LEGACY(dev_type
, S_IRUGO
, csrow_dev_type_show
, NULL
);
261 DEVICE_ATTR_LEGACY(mem_type
, S_IRUGO
, csrow_mem_type_show
, NULL
);
262 DEVICE_ATTR_LEGACY(edac_mode
, S_IRUGO
, csrow_edac_mode_show
, NULL
);
263 DEVICE_ATTR_LEGACY(ue_count
, S_IRUGO
, csrow_ue_count_show
, NULL
);
264 DEVICE_ATTR_LEGACY(ce_count
, S_IRUGO
, csrow_ce_count_show
, NULL
);
266 /* default attributes of the CSROW<id> object */
267 static struct attribute
*csrow_attrs
[] = {
268 &dev_attr_legacy_dev_type
.attr
,
269 &dev_attr_legacy_mem_type
.attr
,
270 &dev_attr_legacy_edac_mode
.attr
,
271 &dev_attr_legacy_size_mb
.attr
,
272 &dev_attr_legacy_ue_count
.attr
,
273 &dev_attr_legacy_ce_count
.attr
,
277 static struct attribute_group csrow_attr_grp
= {
278 .attrs
= csrow_attrs
,
281 static const struct attribute_group
*csrow_attr_groups
[] = {
286 static void csrow_attr_release(struct device
*dev
)
288 struct csrow_info
*csrow
= container_of(dev
, struct csrow_info
, dev
);
290 debugf1("Releasing csrow device %s\n", dev_name(dev
));
294 static struct device_type csrow_attr_type
= {
295 .groups
= csrow_attr_groups
,
296 .release
= csrow_attr_release
,
300 * possible dynamic channel DIMM Label attribute files
304 #define EDAC_NR_CHANNELS 6
306 DEVICE_CHANNEL(ch0_dimm_label
, S_IRUGO
| S_IWUSR
,
307 channel_dimm_label_show
, channel_dimm_label_store
, 0);
308 DEVICE_CHANNEL(ch1_dimm_label
, S_IRUGO
| S_IWUSR
,
309 channel_dimm_label_show
, channel_dimm_label_store
, 1);
310 DEVICE_CHANNEL(ch2_dimm_label
, S_IRUGO
| S_IWUSR
,
311 channel_dimm_label_show
, channel_dimm_label_store
, 2);
312 DEVICE_CHANNEL(ch3_dimm_label
, S_IRUGO
| S_IWUSR
,
313 channel_dimm_label_show
, channel_dimm_label_store
, 3);
314 DEVICE_CHANNEL(ch4_dimm_label
, S_IRUGO
| S_IWUSR
,
315 channel_dimm_label_show
, channel_dimm_label_store
, 4);
316 DEVICE_CHANNEL(ch5_dimm_label
, S_IRUGO
| S_IWUSR
,
317 channel_dimm_label_show
, channel_dimm_label_store
, 5);
319 /* Total possible dynamic DIMM Label attribute file table */
320 static struct device_attribute
*dynamic_csrow_dimm_attr
[] = {
321 &dev_attr_legacy_ch0_dimm_label
.attr
,
322 &dev_attr_legacy_ch1_dimm_label
.attr
,
323 &dev_attr_legacy_ch2_dimm_label
.attr
,
324 &dev_attr_legacy_ch3_dimm_label
.attr
,
325 &dev_attr_legacy_ch4_dimm_label
.attr
,
326 &dev_attr_legacy_ch5_dimm_label
.attr
329 /* possible dynamic channel ce_count attribute files */
330 DEVICE_CHANNEL(ch0_ce_count
, S_IRUGO
| S_IWUSR
,
331 channel_ce_count_show
, NULL
, 0);
332 DEVICE_CHANNEL(ch1_ce_count
, S_IRUGO
| S_IWUSR
,
333 channel_ce_count_show
, NULL
, 1);
334 DEVICE_CHANNEL(ch2_ce_count
, S_IRUGO
| S_IWUSR
,
335 channel_ce_count_show
, NULL
, 2);
336 DEVICE_CHANNEL(ch3_ce_count
, S_IRUGO
| S_IWUSR
,
337 channel_ce_count_show
, NULL
, 3);
338 DEVICE_CHANNEL(ch4_ce_count
, S_IRUGO
| S_IWUSR
,
339 channel_ce_count_show
, NULL
, 4);
340 DEVICE_CHANNEL(ch5_ce_count
, S_IRUGO
| S_IWUSR
,
341 channel_ce_count_show
, NULL
, 5);
343 /* Total possible dynamic ce_count attribute file table */
344 static struct device_attribute
*dynamic_csrow_ce_count_attr
[] = {
345 &dev_attr_legacy_ch0_ce_count
.attr
,
346 &dev_attr_legacy_ch1_ce_count
.attr
,
347 &dev_attr_legacy_ch2_ce_count
.attr
,
348 &dev_attr_legacy_ch3_ce_count
.attr
,
349 &dev_attr_legacy_ch4_ce_count
.attr
,
350 &dev_attr_legacy_ch5_ce_count
.attr
353 static inline int nr_pages_per_csrow(struct csrow_info
*csrow
)
355 int chan
, nr_pages
= 0;
357 for (chan
= 0; chan
< csrow
->nr_channels
; chan
++)
358 nr_pages
+= csrow
->channels
[chan
]->dimm
->nr_pages
;
363 /* Create a CSROW object under specifed edac_mc_device */
364 static int edac_create_csrow_object(struct mem_ctl_info
*mci
,
365 struct csrow_info
*csrow
, int index
)
369 if (csrow
->nr_channels
>= EDAC_NR_CHANNELS
)
372 csrow
->dev
.type
= &csrow_attr_type
;
373 csrow
->dev
.bus
= &mci
->bus
;
374 device_initialize(&csrow
->dev
);
375 csrow
->dev
.parent
= &mci
->dev
;
376 dev_set_name(&csrow
->dev
, "csrow%d", index
);
377 dev_set_drvdata(&csrow
->dev
, csrow
);
379 debugf0("creating (virtual) csrow node %s\n", dev_name(&csrow
->dev
));
381 err
= device_add(&csrow
->dev
);
385 for (chan
= 0; chan
< csrow
->nr_channels
; chan
++) {
386 /* Only expose populated DIMMs */
387 if (!csrow
->channels
[chan
]->dimm
->nr_pages
)
389 err
= device_create_file(&csrow
->dev
,
390 dynamic_csrow_dimm_attr
[chan
]);
393 err
= device_create_file(&csrow
->dev
,
394 dynamic_csrow_ce_count_attr
[chan
]);
396 device_remove_file(&csrow
->dev
,
397 dynamic_csrow_dimm_attr
[chan
]);
405 for (--chan
; chan
>= 0; chan
--) {
406 device_remove_file(&csrow
->dev
,
407 dynamic_csrow_dimm_attr
[chan
]);
408 device_remove_file(&csrow
->dev
,
409 dynamic_csrow_ce_count_attr
[chan
]);
411 put_device(&csrow
->dev
);
416 /* Create a CSROW object under specifed edac_mc_device */
417 static int edac_create_csrow_objects(struct mem_ctl_info
*mci
)
420 struct csrow_info
*csrow
;
422 for (i
= 0; i
< mci
->nr_csrows
; i
++) {
423 csrow
= mci
->csrows
[i
];
424 if (!nr_pages_per_csrow(csrow
))
426 err
= edac_create_csrow_object(mci
, mci
->csrows
[i
], i
);
433 for (--i
; i
>= 0; i
--) {
434 csrow
= mci
->csrows
[i
];
435 if (!nr_pages_per_csrow(csrow
))
437 for (chan
= csrow
->nr_channels
- 1; chan
>= 0; chan
--) {
438 if (!csrow
->channels
[chan
]->dimm
->nr_pages
)
440 device_remove_file(&csrow
->dev
,
441 dynamic_csrow_dimm_attr
[chan
]);
442 device_remove_file(&csrow
->dev
,
443 dynamic_csrow_ce_count_attr
[chan
]);
445 put_device(&mci
->csrows
[i
]->dev
);
451 static void edac_delete_csrow_objects(struct mem_ctl_info
*mci
)
454 struct csrow_info
*csrow
;
456 for (i
= mci
->nr_csrows
- 1; i
>= 0; i
--) {
457 csrow
= mci
->csrows
[i
];
458 if (!nr_pages_per_csrow(csrow
))
460 for (chan
= csrow
->nr_channels
- 1; chan
>= 0; chan
--) {
461 if (!csrow
->channels
[chan
]->dimm
->nr_pages
)
463 debugf1("Removing csrow %d channel %d sysfs nodes\n",
465 device_remove_file(&csrow
->dev
,
466 dynamic_csrow_dimm_attr
[chan
]);
467 device_remove_file(&csrow
->dev
,
468 dynamic_csrow_ce_count_attr
[chan
]);
470 put_device(&mci
->csrows
[i
]->dev
);
471 device_del(&mci
->csrows
[i
]->dev
);
477 * Per-dimm (or per-rank) devices
480 #define to_dimm(k) container_of(k, struct dimm_info, dev)
482 /* show/store functions for DIMM Label attributes */
483 static ssize_t
dimmdev_location_show(struct device
*dev
,
484 struct device_attribute
*mattr
, char *data
)
486 struct dimm_info
*dimm
= to_dimm(dev
);
487 struct mem_ctl_info
*mci
= dimm
->mci
;
491 for (i
= 0; i
< mci
->n_layers
; i
++) {
492 p
+= sprintf(p
, "%s %d ",
493 edac_layer_name
[mci
->layers
[i
].type
],
500 static ssize_t
dimmdev_label_show(struct device
*dev
,
501 struct device_attribute
*mattr
, char *data
)
503 struct dimm_info
*dimm
= to_dimm(dev
);
505 /* if field has not been initialized, there is nothing to send */
509 return snprintf(data
, EDAC_MC_LABEL_LEN
, "%s\n", dimm
->label
);
512 static ssize_t
dimmdev_label_store(struct device
*dev
,
513 struct device_attribute
*mattr
,
517 struct dimm_info
*dimm
= to_dimm(dev
);
519 ssize_t max_size
= 0;
521 max_size
= min((ssize_t
) count
, (ssize_t
) EDAC_MC_LABEL_LEN
- 1);
522 strncpy(dimm
->label
, data
, max_size
);
523 dimm
->label
[max_size
] = '\0';
528 static ssize_t
dimmdev_size_show(struct device
*dev
,
529 struct device_attribute
*mattr
, char *data
)
531 struct dimm_info
*dimm
= to_dimm(dev
);
533 return sprintf(data
, "%u\n", PAGES_TO_MiB(dimm
->nr_pages
));
536 static ssize_t
dimmdev_mem_type_show(struct device
*dev
,
537 struct device_attribute
*mattr
, char *data
)
539 struct dimm_info
*dimm
= to_dimm(dev
);
541 return sprintf(data
, "%s\n", mem_types
[dimm
->mtype
]);
544 static ssize_t
dimmdev_dev_type_show(struct device
*dev
,
545 struct device_attribute
*mattr
, char *data
)
547 struct dimm_info
*dimm
= to_dimm(dev
);
549 return sprintf(data
, "%s\n", dev_types
[dimm
->dtype
]);
552 static ssize_t
dimmdev_edac_mode_show(struct device
*dev
,
553 struct device_attribute
*mattr
,
556 struct dimm_info
*dimm
= to_dimm(dev
);
558 return sprintf(data
, "%s\n", edac_caps
[dimm
->edac_mode
]);
561 /* dimm/rank attribute files */
562 static DEVICE_ATTR(dimm_label
, S_IRUGO
| S_IWUSR
,
563 dimmdev_label_show
, dimmdev_label_store
);
564 static DEVICE_ATTR(dimm_location
, S_IRUGO
, dimmdev_location_show
, NULL
);
565 static DEVICE_ATTR(size
, S_IRUGO
, dimmdev_size_show
, NULL
);
566 static DEVICE_ATTR(dimm_mem_type
, S_IRUGO
, dimmdev_mem_type_show
, NULL
);
567 static DEVICE_ATTR(dimm_dev_type
, S_IRUGO
, dimmdev_dev_type_show
, NULL
);
568 static DEVICE_ATTR(dimm_edac_mode
, S_IRUGO
, dimmdev_edac_mode_show
, NULL
);
570 /* attributes of the dimm<id>/rank<id> object */
571 static struct attribute
*dimm_attrs
[] = {
572 &dev_attr_dimm_label
.attr
,
573 &dev_attr_dimm_location
.attr
,
575 &dev_attr_dimm_mem_type
.attr
,
576 &dev_attr_dimm_dev_type
.attr
,
577 &dev_attr_dimm_edac_mode
.attr
,
581 static struct attribute_group dimm_attr_grp
= {
585 static const struct attribute_group
*dimm_attr_groups
[] = {
590 static void dimm_attr_release(struct device
*dev
)
592 struct dimm_info
*dimm
= container_of(dev
, struct dimm_info
, dev
);
594 debugf1("Releasing dimm device %s\n", dev_name(dev
));
598 static struct device_type dimm_attr_type
= {
599 .groups
= dimm_attr_groups
,
600 .release
= dimm_attr_release
,
603 /* Create a DIMM object under specifed memory controller device */
604 static int edac_create_dimm_object(struct mem_ctl_info
*mci
,
605 struct dimm_info
*dimm
,
611 dimm
->dev
.type
= &dimm_attr_type
;
612 dimm
->dev
.bus
= &mci
->bus
;
613 device_initialize(&dimm
->dev
);
615 dimm
->dev
.parent
= &mci
->dev
;
616 if (mci
->mem_is_per_rank
)
617 dev_set_name(&dimm
->dev
, "rank%d", index
);
619 dev_set_name(&dimm
->dev
, "dimm%d", index
);
620 dev_set_drvdata(&dimm
->dev
, dimm
);
621 pm_runtime_forbid(&mci
->dev
);
623 err
= device_add(&dimm
->dev
);
625 debugf0("creating rank/dimm device %s\n", dev_name(&dimm
->dev
));
631 * Memory controller device
634 #define to_mci(k) container_of(k, struct mem_ctl_info, dev)
636 static ssize_t
mci_reset_counters_store(struct device
*dev
,
637 struct device_attribute
*mattr
,
638 const char *data
, size_t count
)
640 struct mem_ctl_info
*mci
= to_mci(dev
);
641 int cnt
, row
, chan
, i
;
644 mci
->ue_noinfo_count
= 0;
645 mci
->ce_noinfo_count
= 0;
647 for (row
= 0; row
< mci
->nr_csrows
; row
++) {
648 struct csrow_info
*ri
= mci
->csrows
[row
];
653 for (chan
= 0; chan
< ri
->nr_channels
; chan
++)
654 ri
->channels
[chan
]->ce_count
= 0;
658 for (i
= 0; i
< mci
->n_layers
; i
++) {
659 cnt
*= mci
->layers
[i
].size
;
660 memset(mci
->ce_per_layer
[i
], 0, cnt
* sizeof(u32
));
661 memset(mci
->ue_per_layer
[i
], 0, cnt
* sizeof(u32
));
664 mci
->start_time
= jiffies
;
668 /* Memory scrubbing interface:
670 * A MC driver can limit the scrubbing bandwidth based on the CPU type.
671 * Therefore, ->set_sdram_scrub_rate should be made to return the actual
672 * bandwidth that is accepted or 0 when scrubbing is to be disabled.
674 * Negative value still means that an error has occurred while setting
677 static ssize_t
mci_sdram_scrub_rate_store(struct device
*dev
,
678 struct device_attribute
*mattr
,
679 const char *data
, size_t count
)
681 struct mem_ctl_info
*mci
= to_mci(dev
);
682 unsigned long bandwidth
= 0;
685 if (!mci
->set_sdram_scrub_rate
)
688 if (strict_strtoul(data
, 10, &bandwidth
) < 0)
691 new_bw
= mci
->set_sdram_scrub_rate(mci
, bandwidth
);
693 edac_printk(KERN_WARNING
, EDAC_MC
,
694 "Error setting scrub rate to: %lu\n", bandwidth
);
702 * ->get_sdram_scrub_rate() return value semantics same as above.
704 static ssize_t
mci_sdram_scrub_rate_show(struct device
*dev
,
705 struct device_attribute
*mattr
,
708 struct mem_ctl_info
*mci
= to_mci(dev
);
711 if (!mci
->get_sdram_scrub_rate
)
714 bandwidth
= mci
->get_sdram_scrub_rate(mci
);
716 edac_printk(KERN_DEBUG
, EDAC_MC
, "Error reading scrub rate\n");
720 return sprintf(data
, "%d\n", bandwidth
);
723 /* default attribute files for the MCI object */
724 static ssize_t
mci_ue_count_show(struct device
*dev
,
725 struct device_attribute
*mattr
,
728 struct mem_ctl_info
*mci
= to_mci(dev
);
730 return sprintf(data
, "%d\n", mci
->ue_mc
);
733 static ssize_t
mci_ce_count_show(struct device
*dev
,
734 struct device_attribute
*mattr
,
737 struct mem_ctl_info
*mci
= to_mci(dev
);
739 return sprintf(data
, "%d\n", mci
->ce_mc
);
742 static ssize_t
mci_ce_noinfo_show(struct device
*dev
,
743 struct device_attribute
*mattr
,
746 struct mem_ctl_info
*mci
= to_mci(dev
);
748 return sprintf(data
, "%d\n", mci
->ce_noinfo_count
);
751 static ssize_t
mci_ue_noinfo_show(struct device
*dev
,
752 struct device_attribute
*mattr
,
755 struct mem_ctl_info
*mci
= to_mci(dev
);
757 return sprintf(data
, "%d\n", mci
->ue_noinfo_count
);
760 static ssize_t
mci_seconds_show(struct device
*dev
,
761 struct device_attribute
*mattr
,
764 struct mem_ctl_info
*mci
= to_mci(dev
);
766 return sprintf(data
, "%ld\n", (jiffies
- mci
->start_time
) / HZ
);
769 static ssize_t
mci_ctl_name_show(struct device
*dev
,
770 struct device_attribute
*mattr
,
773 struct mem_ctl_info
*mci
= to_mci(dev
);
775 return sprintf(data
, "%s\n", mci
->ctl_name
);
778 static ssize_t
mci_size_mb_show(struct device
*dev
,
779 struct device_attribute
*mattr
,
782 struct mem_ctl_info
*mci
= to_mci(dev
);
783 int total_pages
= 0, csrow_idx
, j
;
785 for (csrow_idx
= 0; csrow_idx
< mci
->nr_csrows
; csrow_idx
++) {
786 struct csrow_info
*csrow
= mci
->csrows
[csrow_idx
];
788 for (j
= 0; j
< csrow
->nr_channels
; j
++) {
789 struct dimm_info
*dimm
= csrow
->channels
[j
]->dimm
;
791 total_pages
+= dimm
->nr_pages
;
795 return sprintf(data
, "%u\n", PAGES_TO_MiB(total_pages
));
798 static ssize_t
mci_max_location_show(struct device
*dev
,
799 struct device_attribute
*mattr
,
802 struct mem_ctl_info
*mci
= to_mci(dev
);
806 for (i
= 0; i
< mci
->n_layers
; i
++) {
807 p
+= sprintf(p
, "%s %d ",
808 edac_layer_name
[mci
->layers
[i
].type
],
809 mci
->layers
[i
].size
- 1);
815 #ifdef CONFIG_EDAC_DEBUG
816 static ssize_t
edac_fake_inject_write(struct file
*file
,
817 const char __user
*data
,
818 size_t count
, loff_t
*ppos
)
820 struct device
*dev
= file
->private_data
;
821 struct mem_ctl_info
*mci
= to_mci(dev
);
822 static enum hw_event_mc_err_type type
;
824 type
= mci
->fake_inject_ue
? HW_EVENT_ERR_UNCORRECTED
825 : HW_EVENT_ERR_CORRECTED
;
828 "Generating a %s fake error to %d.%d.%d to test core handling. NOTE: this won't test the driver-specific decoding logic.\n",
829 (type
== HW_EVENT_ERR_UNCORRECTED
) ? "UE" : "CE",
830 mci
->fake_inject_layer
[0],
831 mci
->fake_inject_layer
[1],
832 mci
->fake_inject_layer
[2]
834 edac_mc_handle_error(type
, mci
, 0, 0, 0,
835 mci
->fake_inject_layer
[0],
836 mci
->fake_inject_layer
[1],
837 mci
->fake_inject_layer
[2],
838 "FAKE ERROR", "for EDAC testing only", NULL
);
843 static int debugfs_open(struct inode
*inode
, struct file
*file
)
845 file
->private_data
= inode
->i_private
;
849 static const struct file_operations debug_fake_inject_fops
= {
850 .open
= debugfs_open
,
851 .write
= edac_fake_inject_write
,
852 .llseek
= generic_file_llseek
,
856 /* default Control file */
857 DEVICE_ATTR(reset_counters
, S_IWUSR
, NULL
, mci_reset_counters_store
);
859 /* default Attribute files */
860 DEVICE_ATTR(mc_name
, S_IRUGO
, mci_ctl_name_show
, NULL
);
861 DEVICE_ATTR(size_mb
, S_IRUGO
, mci_size_mb_show
, NULL
);
862 DEVICE_ATTR(seconds_since_reset
, S_IRUGO
, mci_seconds_show
, NULL
);
863 DEVICE_ATTR(ue_noinfo_count
, S_IRUGO
, mci_ue_noinfo_show
, NULL
);
864 DEVICE_ATTR(ce_noinfo_count
, S_IRUGO
, mci_ce_noinfo_show
, NULL
);
865 DEVICE_ATTR(ue_count
, S_IRUGO
, mci_ue_count_show
, NULL
);
866 DEVICE_ATTR(ce_count
, S_IRUGO
, mci_ce_count_show
, NULL
);
867 DEVICE_ATTR(max_location
, S_IRUGO
, mci_max_location_show
, NULL
);
869 /* memory scrubber attribute file */
870 DEVICE_ATTR(sdram_scrub_rate
, S_IRUGO
| S_IWUSR
, mci_sdram_scrub_rate_show
,
871 mci_sdram_scrub_rate_store
);
873 static struct attribute
*mci_attrs
[] = {
874 &dev_attr_reset_counters
.attr
,
875 &dev_attr_mc_name
.attr
,
876 &dev_attr_size_mb
.attr
,
877 &dev_attr_seconds_since_reset
.attr
,
878 &dev_attr_ue_noinfo_count
.attr
,
879 &dev_attr_ce_noinfo_count
.attr
,
880 &dev_attr_ue_count
.attr
,
881 &dev_attr_ce_count
.attr
,
882 &dev_attr_sdram_scrub_rate
.attr
,
883 &dev_attr_max_location
.attr
,
887 static struct attribute_group mci_attr_grp
= {
891 static const struct attribute_group
*mci_attr_groups
[] = {
896 static void mci_attr_release(struct device
*dev
)
898 struct mem_ctl_info
*mci
= container_of(dev
, struct mem_ctl_info
, dev
);
900 debugf1("Releasing csrow device %s\n", dev_name(dev
));
904 static struct device_type mci_attr_type
= {
905 .groups
= mci_attr_groups
,
906 .release
= mci_attr_release
,
909 #ifdef CONFIG_EDAC_DEBUG
910 int edac_create_debug_nodes(struct mem_ctl_info
*mci
)
912 struct dentry
*d
, *parent
;
916 d
= debugfs_create_dir(mci
->dev
.kobj
.name
, mci
->debugfs
);
921 for (i
= 0; i
< mci
->n_layers
; i
++) {
922 sprintf(name
, "fake_inject_%s",
923 edac_layer_name
[mci
->layers
[i
].type
]);
924 d
= debugfs_create_u8(name
, S_IRUGO
| S_IWUSR
, parent
,
925 &mci
->fake_inject_layer
[i
]);
930 d
= debugfs_create_bool("fake_inject_ue", S_IRUGO
| S_IWUSR
, parent
,
931 &mci
->fake_inject_ue
);
935 d
= debugfs_create_file("fake_inject", S_IWUSR
, parent
,
937 &debug_fake_inject_fops
);
943 debugfs_remove(mci
->debugfs
);
949 * Create a new Memory Controller kobject instance,
950 * mc<id> under the 'mc' directory
956 int edac_create_sysfs_mci_device(struct mem_ctl_info
*mci
)
961 * The memory controller needs its own bus, in order to avoid
962 * namespace conflicts at /sys/bus/edac.
964 mci
->bus
.name
= kasprintf(GFP_KERNEL
, "mc%d", mci
->mc_idx
);
967 debugf0("creating bus %s\n",mci
->bus
.name
);
968 err
= bus_register(&mci
->bus
);
972 /* get the /sys/devices/system/edac subsys reference */
973 mci
->dev
.type
= &mci_attr_type
;
974 device_initialize(&mci
->dev
);
976 mci
->dev
.parent
= mci_pdev
;
977 mci
->dev
.bus
= &mci
->bus
;
978 dev_set_name(&mci
->dev
, "mc%d", mci
->mc_idx
);
979 dev_set_drvdata(&mci
->dev
, mci
);
980 pm_runtime_forbid(&mci
->dev
);
982 debugf0("creating device %s\n", dev_name(&mci
->dev
));
983 err
= device_add(&mci
->dev
);
985 bus_unregister(&mci
->bus
);
986 kfree(mci
->bus
.name
);
991 * Create the dimm/rank devices
993 for (i
= 0; i
< mci
->tot_dimms
; i
++) {
994 struct dimm_info
*dimm
= mci
->dimms
[i
];
995 /* Only expose populated DIMMs */
996 if (dimm
->nr_pages
== 0)
998 #ifdef CONFIG_EDAC_DEBUG
999 debugf1("creating dimm%d, located at ",
1001 if (edac_debug_level
>= 1) {
1003 for (lay
= 0; lay
< mci
->n_layers
; lay
++)
1004 printk(KERN_CONT
"%s %d ",
1005 edac_layer_name
[mci
->layers
[lay
].type
],
1006 dimm
->location
[lay
]);
1007 printk(KERN_CONT
"\n");
1010 err
= edac_create_dimm_object(mci
, dimm
, i
);
1012 debugf1("failure: create dimm %d obj\n",
1018 #ifdef CONFIG_EDAC_LEGACY_SYSFS
1019 err
= edac_create_csrow_objects(mci
);
1024 #ifdef CONFIG_EDAC_DEBUG
1025 edac_create_debug_nodes(mci
);
1030 for (i
--; i
>= 0; i
--) {
1031 struct dimm_info
*dimm
= mci
->dimms
[i
];
1032 if (dimm
->nr_pages
== 0)
1034 put_device(&dimm
->dev
);
1035 device_del(&dimm
->dev
);
1037 put_device(&mci
->dev
);
1038 device_del(&mci
->dev
);
1039 bus_unregister(&mci
->bus
);
1040 kfree(mci
->bus
.name
);
1045 * remove a Memory Controller instance
1047 void edac_remove_sysfs_mci_device(struct mem_ctl_info
*mci
)
1053 #ifdef CONFIG_EDAC_DEBUG
1054 debugfs_remove(mci
->debugfs
);
1056 #ifdef CONFIG_EDAC_LEGACY_SYSFS
1057 edac_delete_csrow_objects(mci
);
1060 for (i
= 0; i
< mci
->tot_dimms
; i
++) {
1061 struct dimm_info
*dimm
= mci
->dimms
[i
];
1062 if (dimm
->nr_pages
== 0)
1064 debugf0("removing device %s\n", dev_name(&dimm
->dev
));
1065 put_device(&dimm
->dev
);
1066 device_del(&dimm
->dev
);
1070 void edac_unregister_sysfs(struct mem_ctl_info
*mci
)
1072 debugf1("Unregistering device %s\n", dev_name(&mci
->dev
));
1073 put_device(&mci
->dev
);
1074 device_del(&mci
->dev
);
1075 bus_unregister(&mci
->bus
);
1076 kfree(mci
->bus
.name
);
1079 static void mc_attr_release(struct device
*dev
)
1082 * There's no container structure here, as this is just the mci
1083 * parent device, used to create the /sys/devices/mc sysfs node.
1084 * So, there are no attributes on it.
1086 debugf1("Releasing device %s\n", dev_name(dev
));
1090 static struct device_type mc_attr_type
= {
1091 .release
= mc_attr_release
,
1094 * Init/exit code for the module. Basically, creates/removes /sys/class/rc
1096 int __init
edac_mc_sysfs_init(void)
1098 struct bus_type
*edac_subsys
;
1101 /* get the /sys/devices/system/edac subsys reference */
1102 edac_subsys
= edac_get_sysfs_subsys();
1103 if (edac_subsys
== NULL
) {
1104 debugf1("no edac_subsys\n");
1108 mci_pdev
= kzalloc(sizeof(*mci_pdev
), GFP_KERNEL
);
1110 mci_pdev
->bus
= edac_subsys
;
1111 mci_pdev
->type
= &mc_attr_type
;
1112 device_initialize(mci_pdev
);
1113 dev_set_name(mci_pdev
, "mc");
1115 err
= device_add(mci_pdev
);
1119 debugf0("device %s created\n", dev_name(mci_pdev
));
1124 void __exit
edac_mc_sysfs_exit(void)
1126 put_device(mci_pdev
);
1127 device_del(mci_pdev
);
1128 edac_put_sysfs_subsys();