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 edac_dbg(1, "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 edac_dbg(0, "creating (virtual) csrow node %s\n",
380 dev_name(&csrow
->dev
));
382 err
= device_add(&csrow
->dev
);
386 for (chan
= 0; chan
< csrow
->nr_channels
; chan
++) {
387 /* Only expose populated DIMMs */
388 if (!csrow
->channels
[chan
]->dimm
->nr_pages
)
390 err
= device_create_file(&csrow
->dev
,
391 dynamic_csrow_dimm_attr
[chan
]);
394 err
= device_create_file(&csrow
->dev
,
395 dynamic_csrow_ce_count_attr
[chan
]);
397 device_remove_file(&csrow
->dev
,
398 dynamic_csrow_dimm_attr
[chan
]);
406 for (--chan
; chan
>= 0; chan
--) {
407 device_remove_file(&csrow
->dev
,
408 dynamic_csrow_dimm_attr
[chan
]);
409 device_remove_file(&csrow
->dev
,
410 dynamic_csrow_ce_count_attr
[chan
]);
412 put_device(&csrow
->dev
);
417 /* Create a CSROW object under specifed edac_mc_device */
418 static int edac_create_csrow_objects(struct mem_ctl_info
*mci
)
421 struct csrow_info
*csrow
;
423 for (i
= 0; i
< mci
->nr_csrows
; i
++) {
424 csrow
= mci
->csrows
[i
];
425 if (!nr_pages_per_csrow(csrow
))
427 err
= edac_create_csrow_object(mci
, mci
->csrows
[i
], i
);
434 for (--i
; i
>= 0; i
--) {
435 csrow
= mci
->csrows
[i
];
436 if (!nr_pages_per_csrow(csrow
))
438 for (chan
= csrow
->nr_channels
- 1; chan
>= 0; chan
--) {
439 if (!csrow
->channels
[chan
]->dimm
->nr_pages
)
441 device_remove_file(&csrow
->dev
,
442 dynamic_csrow_dimm_attr
[chan
]);
443 device_remove_file(&csrow
->dev
,
444 dynamic_csrow_ce_count_attr
[chan
]);
446 put_device(&mci
->csrows
[i
]->dev
);
452 static void edac_delete_csrow_objects(struct mem_ctl_info
*mci
)
455 struct csrow_info
*csrow
;
457 for (i
= mci
->nr_csrows
- 1; i
>= 0; i
--) {
458 csrow
= mci
->csrows
[i
];
459 if (!nr_pages_per_csrow(csrow
))
461 for (chan
= csrow
->nr_channels
- 1; chan
>= 0; chan
--) {
462 if (!csrow
->channels
[chan
]->dimm
->nr_pages
)
464 edac_dbg(1, "Removing csrow %d channel %d sysfs nodes\n",
466 device_remove_file(&csrow
->dev
,
467 dynamic_csrow_dimm_attr
[chan
]);
468 device_remove_file(&csrow
->dev
,
469 dynamic_csrow_ce_count_attr
[chan
]);
471 put_device(&mci
->csrows
[i
]->dev
);
472 device_del(&mci
->csrows
[i
]->dev
);
478 * Per-dimm (or per-rank) devices
481 #define to_dimm(k) container_of(k, struct dimm_info, dev)
483 /* show/store functions for DIMM Label attributes */
484 static ssize_t
dimmdev_location_show(struct device
*dev
,
485 struct device_attribute
*mattr
, char *data
)
487 struct dimm_info
*dimm
= to_dimm(dev
);
489 return edac_dimm_info_location(dimm
, data
, PAGE_SIZE
);
492 static ssize_t
dimmdev_label_show(struct device
*dev
,
493 struct device_attribute
*mattr
, char *data
)
495 struct dimm_info
*dimm
= to_dimm(dev
);
497 /* if field has not been initialized, there is nothing to send */
501 return snprintf(data
, EDAC_MC_LABEL_LEN
, "%s\n", dimm
->label
);
504 static ssize_t
dimmdev_label_store(struct device
*dev
,
505 struct device_attribute
*mattr
,
509 struct dimm_info
*dimm
= to_dimm(dev
);
511 ssize_t max_size
= 0;
513 max_size
= min((ssize_t
) count
, (ssize_t
) EDAC_MC_LABEL_LEN
- 1);
514 strncpy(dimm
->label
, data
, max_size
);
515 dimm
->label
[max_size
] = '\0';
520 static ssize_t
dimmdev_size_show(struct device
*dev
,
521 struct device_attribute
*mattr
, char *data
)
523 struct dimm_info
*dimm
= to_dimm(dev
);
525 return sprintf(data
, "%u\n", PAGES_TO_MiB(dimm
->nr_pages
));
528 static ssize_t
dimmdev_mem_type_show(struct device
*dev
,
529 struct device_attribute
*mattr
, char *data
)
531 struct dimm_info
*dimm
= to_dimm(dev
);
533 return sprintf(data
, "%s\n", mem_types
[dimm
->mtype
]);
536 static ssize_t
dimmdev_dev_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", dev_types
[dimm
->dtype
]);
544 static ssize_t
dimmdev_edac_mode_show(struct device
*dev
,
545 struct device_attribute
*mattr
,
548 struct dimm_info
*dimm
= to_dimm(dev
);
550 return sprintf(data
, "%s\n", edac_caps
[dimm
->edac_mode
]);
553 /* dimm/rank attribute files */
554 static DEVICE_ATTR(dimm_label
, S_IRUGO
| S_IWUSR
,
555 dimmdev_label_show
, dimmdev_label_store
);
556 static DEVICE_ATTR(dimm_location
, S_IRUGO
, dimmdev_location_show
, NULL
);
557 static DEVICE_ATTR(size
, S_IRUGO
, dimmdev_size_show
, NULL
);
558 static DEVICE_ATTR(dimm_mem_type
, S_IRUGO
, dimmdev_mem_type_show
, NULL
);
559 static DEVICE_ATTR(dimm_dev_type
, S_IRUGO
, dimmdev_dev_type_show
, NULL
);
560 static DEVICE_ATTR(dimm_edac_mode
, S_IRUGO
, dimmdev_edac_mode_show
, NULL
);
562 /* attributes of the dimm<id>/rank<id> object */
563 static struct attribute
*dimm_attrs
[] = {
564 &dev_attr_dimm_label
.attr
,
565 &dev_attr_dimm_location
.attr
,
567 &dev_attr_dimm_mem_type
.attr
,
568 &dev_attr_dimm_dev_type
.attr
,
569 &dev_attr_dimm_edac_mode
.attr
,
573 static struct attribute_group dimm_attr_grp
= {
577 static const struct attribute_group
*dimm_attr_groups
[] = {
582 static void dimm_attr_release(struct device
*dev
)
584 struct dimm_info
*dimm
= container_of(dev
, struct dimm_info
, dev
);
586 edac_dbg(1, "Releasing dimm device %s\n", dev_name(dev
));
590 static struct device_type dimm_attr_type
= {
591 .groups
= dimm_attr_groups
,
592 .release
= dimm_attr_release
,
595 /* Create a DIMM object under specifed memory controller device */
596 static int edac_create_dimm_object(struct mem_ctl_info
*mci
,
597 struct dimm_info
*dimm
,
603 dimm
->dev
.type
= &dimm_attr_type
;
604 dimm
->dev
.bus
= &mci
->bus
;
605 device_initialize(&dimm
->dev
);
607 dimm
->dev
.parent
= &mci
->dev
;
608 if (mci
->mem_is_per_rank
)
609 dev_set_name(&dimm
->dev
, "rank%d", index
);
611 dev_set_name(&dimm
->dev
, "dimm%d", index
);
612 dev_set_drvdata(&dimm
->dev
, dimm
);
613 pm_runtime_forbid(&mci
->dev
);
615 err
= device_add(&dimm
->dev
);
617 edac_dbg(0, "creating rank/dimm device %s\n", dev_name(&dimm
->dev
));
623 * Memory controller device
626 #define to_mci(k) container_of(k, struct mem_ctl_info, dev)
628 static ssize_t
mci_reset_counters_store(struct device
*dev
,
629 struct device_attribute
*mattr
,
630 const char *data
, size_t count
)
632 struct mem_ctl_info
*mci
= to_mci(dev
);
633 int cnt
, row
, chan
, i
;
636 mci
->ue_noinfo_count
= 0;
637 mci
->ce_noinfo_count
= 0;
639 for (row
= 0; row
< mci
->nr_csrows
; row
++) {
640 struct csrow_info
*ri
= mci
->csrows
[row
];
645 for (chan
= 0; chan
< ri
->nr_channels
; chan
++)
646 ri
->channels
[chan
]->ce_count
= 0;
650 for (i
= 0; i
< mci
->n_layers
; i
++) {
651 cnt
*= mci
->layers
[i
].size
;
652 memset(mci
->ce_per_layer
[i
], 0, cnt
* sizeof(u32
));
653 memset(mci
->ue_per_layer
[i
], 0, cnt
* sizeof(u32
));
656 mci
->start_time
= jiffies
;
660 /* Memory scrubbing interface:
662 * A MC driver can limit the scrubbing bandwidth based on the CPU type.
663 * Therefore, ->set_sdram_scrub_rate should be made to return the actual
664 * bandwidth that is accepted or 0 when scrubbing is to be disabled.
666 * Negative value still means that an error has occurred while setting
669 static ssize_t
mci_sdram_scrub_rate_store(struct device
*dev
,
670 struct device_attribute
*mattr
,
671 const char *data
, size_t count
)
673 struct mem_ctl_info
*mci
= to_mci(dev
);
674 unsigned long bandwidth
= 0;
677 if (!mci
->set_sdram_scrub_rate
)
680 if (strict_strtoul(data
, 10, &bandwidth
) < 0)
683 new_bw
= mci
->set_sdram_scrub_rate(mci
, bandwidth
);
685 edac_printk(KERN_WARNING
, EDAC_MC
,
686 "Error setting scrub rate to: %lu\n", bandwidth
);
694 * ->get_sdram_scrub_rate() return value semantics same as above.
696 static ssize_t
mci_sdram_scrub_rate_show(struct device
*dev
,
697 struct device_attribute
*mattr
,
700 struct mem_ctl_info
*mci
= to_mci(dev
);
703 if (!mci
->get_sdram_scrub_rate
)
706 bandwidth
= mci
->get_sdram_scrub_rate(mci
);
708 edac_printk(KERN_DEBUG
, EDAC_MC
, "Error reading scrub rate\n");
712 return sprintf(data
, "%d\n", bandwidth
);
715 /* default attribute files for the MCI object */
716 static ssize_t
mci_ue_count_show(struct device
*dev
,
717 struct device_attribute
*mattr
,
720 struct mem_ctl_info
*mci
= to_mci(dev
);
722 return sprintf(data
, "%d\n", mci
->ue_mc
);
725 static ssize_t
mci_ce_count_show(struct device
*dev
,
726 struct device_attribute
*mattr
,
729 struct mem_ctl_info
*mci
= to_mci(dev
);
731 return sprintf(data
, "%d\n", mci
->ce_mc
);
734 static ssize_t
mci_ce_noinfo_show(struct device
*dev
,
735 struct device_attribute
*mattr
,
738 struct mem_ctl_info
*mci
= to_mci(dev
);
740 return sprintf(data
, "%d\n", mci
->ce_noinfo_count
);
743 static ssize_t
mci_ue_noinfo_show(struct device
*dev
,
744 struct device_attribute
*mattr
,
747 struct mem_ctl_info
*mci
= to_mci(dev
);
749 return sprintf(data
, "%d\n", mci
->ue_noinfo_count
);
752 static ssize_t
mci_seconds_show(struct device
*dev
,
753 struct device_attribute
*mattr
,
756 struct mem_ctl_info
*mci
= to_mci(dev
);
758 return sprintf(data
, "%ld\n", (jiffies
- mci
->start_time
) / HZ
);
761 static ssize_t
mci_ctl_name_show(struct device
*dev
,
762 struct device_attribute
*mattr
,
765 struct mem_ctl_info
*mci
= to_mci(dev
);
767 return sprintf(data
, "%s\n", mci
->ctl_name
);
770 static ssize_t
mci_size_mb_show(struct device
*dev
,
771 struct device_attribute
*mattr
,
774 struct mem_ctl_info
*mci
= to_mci(dev
);
775 int total_pages
= 0, csrow_idx
, j
;
777 for (csrow_idx
= 0; csrow_idx
< mci
->nr_csrows
; csrow_idx
++) {
778 struct csrow_info
*csrow
= mci
->csrows
[csrow_idx
];
780 for (j
= 0; j
< csrow
->nr_channels
; j
++) {
781 struct dimm_info
*dimm
= csrow
->channels
[j
]->dimm
;
783 total_pages
+= dimm
->nr_pages
;
787 return sprintf(data
, "%u\n", PAGES_TO_MiB(total_pages
));
790 static ssize_t
mci_max_location_show(struct device
*dev
,
791 struct device_attribute
*mattr
,
794 struct mem_ctl_info
*mci
= to_mci(dev
);
798 for (i
= 0; i
< mci
->n_layers
; i
++) {
799 p
+= sprintf(p
, "%s %d ",
800 edac_layer_name
[mci
->layers
[i
].type
],
801 mci
->layers
[i
].size
- 1);
807 #ifdef CONFIG_EDAC_DEBUG
808 static ssize_t
edac_fake_inject_write(struct file
*file
,
809 const char __user
*data
,
810 size_t count
, loff_t
*ppos
)
812 struct device
*dev
= file
->private_data
;
813 struct mem_ctl_info
*mci
= to_mci(dev
);
814 static enum hw_event_mc_err_type type
;
816 type
= mci
->fake_inject_ue
? HW_EVENT_ERR_UNCORRECTED
817 : HW_EVENT_ERR_CORRECTED
;
820 "Generating a %s fake error to %d.%d.%d to test core handling. NOTE: this won't test the driver-specific decoding logic.\n",
821 (type
== HW_EVENT_ERR_UNCORRECTED
) ? "UE" : "CE",
822 mci
->fake_inject_layer
[0],
823 mci
->fake_inject_layer
[1],
824 mci
->fake_inject_layer
[2]
826 edac_mc_handle_error(type
, mci
, 0, 0, 0,
827 mci
->fake_inject_layer
[0],
828 mci
->fake_inject_layer
[1],
829 mci
->fake_inject_layer
[2],
830 "FAKE ERROR", "for EDAC testing only");
835 static int debugfs_open(struct inode
*inode
, struct file
*file
)
837 file
->private_data
= inode
->i_private
;
841 static const struct file_operations debug_fake_inject_fops
= {
842 .open
= debugfs_open
,
843 .write
= edac_fake_inject_write
,
844 .llseek
= generic_file_llseek
,
848 /* default Control file */
849 DEVICE_ATTR(reset_counters
, S_IWUSR
, NULL
, mci_reset_counters_store
);
851 /* default Attribute files */
852 DEVICE_ATTR(mc_name
, S_IRUGO
, mci_ctl_name_show
, NULL
);
853 DEVICE_ATTR(size_mb
, S_IRUGO
, mci_size_mb_show
, NULL
);
854 DEVICE_ATTR(seconds_since_reset
, S_IRUGO
, mci_seconds_show
, NULL
);
855 DEVICE_ATTR(ue_noinfo_count
, S_IRUGO
, mci_ue_noinfo_show
, NULL
);
856 DEVICE_ATTR(ce_noinfo_count
, S_IRUGO
, mci_ce_noinfo_show
, NULL
);
857 DEVICE_ATTR(ue_count
, S_IRUGO
, mci_ue_count_show
, NULL
);
858 DEVICE_ATTR(ce_count
, S_IRUGO
, mci_ce_count_show
, NULL
);
859 DEVICE_ATTR(max_location
, S_IRUGO
, mci_max_location_show
, NULL
);
861 /* memory scrubber attribute file */
862 DEVICE_ATTR(sdram_scrub_rate
, S_IRUGO
| S_IWUSR
, mci_sdram_scrub_rate_show
,
863 mci_sdram_scrub_rate_store
);
865 static struct attribute
*mci_attrs
[] = {
866 &dev_attr_reset_counters
.attr
,
867 &dev_attr_mc_name
.attr
,
868 &dev_attr_size_mb
.attr
,
869 &dev_attr_seconds_since_reset
.attr
,
870 &dev_attr_ue_noinfo_count
.attr
,
871 &dev_attr_ce_noinfo_count
.attr
,
872 &dev_attr_ue_count
.attr
,
873 &dev_attr_ce_count
.attr
,
874 &dev_attr_sdram_scrub_rate
.attr
,
875 &dev_attr_max_location
.attr
,
879 static struct attribute_group mci_attr_grp
= {
883 static const struct attribute_group
*mci_attr_groups
[] = {
888 static void mci_attr_release(struct device
*dev
)
890 struct mem_ctl_info
*mci
= container_of(dev
, struct mem_ctl_info
, dev
);
892 edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev
));
896 static struct device_type mci_attr_type
= {
897 .groups
= mci_attr_groups
,
898 .release
= mci_attr_release
,
901 #ifdef CONFIG_EDAC_DEBUG
902 int edac_create_debug_nodes(struct mem_ctl_info
*mci
)
904 struct dentry
*d
, *parent
;
908 d
= debugfs_create_dir(mci
->dev
.kobj
.name
, mci
->debugfs
);
913 for (i
= 0; i
< mci
->n_layers
; i
++) {
914 sprintf(name
, "fake_inject_%s",
915 edac_layer_name
[mci
->layers
[i
].type
]);
916 d
= debugfs_create_u8(name
, S_IRUGO
| S_IWUSR
, parent
,
917 &mci
->fake_inject_layer
[i
]);
922 d
= debugfs_create_bool("fake_inject_ue", S_IRUGO
| S_IWUSR
, parent
,
923 &mci
->fake_inject_ue
);
927 d
= debugfs_create_file("fake_inject", S_IWUSR
, parent
,
929 &debug_fake_inject_fops
);
935 debugfs_remove(mci
->debugfs
);
941 * Create a new Memory Controller kobject instance,
942 * mc<id> under the 'mc' directory
948 int edac_create_sysfs_mci_device(struct mem_ctl_info
*mci
)
953 * The memory controller needs its own bus, in order to avoid
954 * namespace conflicts at /sys/bus/edac.
956 mci
->bus
.name
= kasprintf(GFP_KERNEL
, "mc%d", mci
->mc_idx
);
959 edac_dbg(0, "creating bus %s\n", mci
->bus
.name
);
960 err
= bus_register(&mci
->bus
);
964 /* get the /sys/devices/system/edac subsys reference */
965 mci
->dev
.type
= &mci_attr_type
;
966 device_initialize(&mci
->dev
);
968 mci
->dev
.parent
= mci_pdev
;
969 mci
->dev
.bus
= &mci
->bus
;
970 dev_set_name(&mci
->dev
, "mc%d", mci
->mc_idx
);
971 dev_set_drvdata(&mci
->dev
, mci
);
972 pm_runtime_forbid(&mci
->dev
);
974 edac_dbg(0, "creating device %s\n", dev_name(&mci
->dev
));
975 err
= device_add(&mci
->dev
);
977 bus_unregister(&mci
->bus
);
978 kfree(mci
->bus
.name
);
983 * Create the dimm/rank devices
985 for (i
= 0; i
< mci
->tot_dimms
; i
++) {
986 struct dimm_info
*dimm
= mci
->dimms
[i
];
987 /* Only expose populated DIMMs */
988 if (dimm
->nr_pages
== 0)
990 #ifdef CONFIG_EDAC_DEBUG
991 edac_dbg(1, "creating dimm%d, located at ", i
);
992 if (edac_debug_level
>= 1) {
994 for (lay
= 0; lay
< mci
->n_layers
; lay
++)
995 printk(KERN_CONT
"%s %d ",
996 edac_layer_name
[mci
->layers
[lay
].type
],
997 dimm
->location
[lay
]);
998 printk(KERN_CONT
"\n");
1001 err
= edac_create_dimm_object(mci
, dimm
, i
);
1003 edac_dbg(1, "failure: create dimm %d obj\n", i
);
1008 #ifdef CONFIG_EDAC_LEGACY_SYSFS
1009 err
= edac_create_csrow_objects(mci
);
1014 #ifdef CONFIG_EDAC_DEBUG
1015 edac_create_debug_nodes(mci
);
1020 for (i
--; i
>= 0; i
--) {
1021 struct dimm_info
*dimm
= mci
->dimms
[i
];
1022 if (dimm
->nr_pages
== 0)
1024 put_device(&dimm
->dev
);
1025 device_del(&dimm
->dev
);
1027 put_device(&mci
->dev
);
1028 device_del(&mci
->dev
);
1029 bus_unregister(&mci
->bus
);
1030 kfree(mci
->bus
.name
);
1035 * remove a Memory Controller instance
1037 void edac_remove_sysfs_mci_device(struct mem_ctl_info
*mci
)
1043 #ifdef CONFIG_EDAC_DEBUG
1044 debugfs_remove(mci
->debugfs
);
1046 #ifdef CONFIG_EDAC_LEGACY_SYSFS
1047 edac_delete_csrow_objects(mci
);
1050 for (i
= 0; i
< mci
->tot_dimms
; i
++) {
1051 struct dimm_info
*dimm
= mci
->dimms
[i
];
1052 if (dimm
->nr_pages
== 0)
1054 edac_dbg(0, "removing device %s\n", dev_name(&dimm
->dev
));
1055 put_device(&dimm
->dev
);
1056 device_del(&dimm
->dev
);
1060 void edac_unregister_sysfs(struct mem_ctl_info
*mci
)
1062 edac_dbg(1, "Unregistering device %s\n", dev_name(&mci
->dev
));
1063 put_device(&mci
->dev
);
1064 device_del(&mci
->dev
);
1065 bus_unregister(&mci
->bus
);
1066 kfree(mci
->bus
.name
);
1069 static void mc_attr_release(struct device
*dev
)
1072 * There's no container structure here, as this is just the mci
1073 * parent device, used to create the /sys/devices/mc sysfs node.
1074 * So, there are no attributes on it.
1076 edac_dbg(1, "Releasing device %s\n", dev_name(dev
));
1080 static struct device_type mc_attr_type
= {
1081 .release
= mc_attr_release
,
1084 * Init/exit code for the module. Basically, creates/removes /sys/class/rc
1086 int __init
edac_mc_sysfs_init(void)
1088 struct bus_type
*edac_subsys
;
1091 /* get the /sys/devices/system/edac subsys reference */
1092 edac_subsys
= edac_get_sysfs_subsys();
1093 if (edac_subsys
== NULL
) {
1094 edac_dbg(1, "no edac_subsys\n");
1098 mci_pdev
= kzalloc(sizeof(*mci_pdev
), GFP_KERNEL
);
1100 mci_pdev
->bus
= edac_subsys
;
1101 mci_pdev
->type
= &mc_attr_type
;
1102 device_initialize(mci_pdev
);
1103 dev_set_name(mci_pdev
, "mc");
1105 err
= device_add(mci_pdev
);
1109 edac_dbg(0, "device %s created\n", dev_name(mci_pdev
));
1114 void __exit
edac_mc_sysfs_exit(void)
1116 put_device(mci_pdev
);
1117 device_del(mci_pdev
);
1118 edac_put_sysfs_subsys();