2 * edac_mc kernel module
3 * (C) 2005, 2006 Linux Networx (http://lnxi.com)
4 * This file may be distributed under the terms of the
5 * GNU General Public License.
7 * Written by Thayne Harbaugh
8 * Based on work by Dan Hollis <goemon at anime dot net> and others.
9 * http://www.anime.net/~goemon/linux-ecc/
11 * Modified by Dave Peterson and Doug Thompson
15 #include <linux/module.h>
16 #include <linux/proc_fs.h>
17 #include <linux/kernel.h>
18 #include <linux/types.h>
19 #include <linux/smp.h>
20 #include <linux/init.h>
21 #include <linux/sysctl.h>
22 #include <linux/highmem.h>
23 #include <linux/timer.h>
24 #include <linux/slab.h>
25 #include <linux/jiffies.h>
26 #include <linux/spinlock.h>
27 #include <linux/list.h>
28 #include <linux/sysdev.h>
29 #include <linux/ctype.h>
30 #include <linux/edac.h>
31 #include <asm/uaccess.h>
34 #include "edac_core.h"
35 #include "edac_module.h"
37 /* lock to memory controller's control array */
38 static DEFINE_MUTEX(mem_ctls_mutex
);
39 static struct list_head mc_devices
= LIST_HEAD_INIT(mc_devices
);
41 #ifdef CONFIG_EDAC_DEBUG
43 static void edac_mc_dump_channel(struct channel_info
*chan
)
45 debugf4("\tchannel = %p\n", chan
);
46 debugf4("\tchannel->chan_idx = %d\n", chan
->chan_idx
);
47 debugf4("\tchannel->ce_count = %d\n", chan
->ce_count
);
48 debugf4("\tchannel->label = '%s'\n", chan
->label
);
49 debugf4("\tchannel->csrow = %p\n\n", chan
->csrow
);
52 static void edac_mc_dump_csrow(struct csrow_info
*csrow
)
54 debugf4("\tcsrow = %p\n", csrow
);
55 debugf4("\tcsrow->csrow_idx = %d\n", csrow
->csrow_idx
);
56 debugf4("\tcsrow->first_page = 0x%lx\n", csrow
->first_page
);
57 debugf4("\tcsrow->last_page = 0x%lx\n", csrow
->last_page
);
58 debugf4("\tcsrow->page_mask = 0x%lx\n", csrow
->page_mask
);
59 debugf4("\tcsrow->nr_pages = 0x%x\n", csrow
->nr_pages
);
60 debugf4("\tcsrow->nr_channels = %d\n", csrow
->nr_channels
);
61 debugf4("\tcsrow->channels = %p\n", csrow
->channels
);
62 debugf4("\tcsrow->mci = %p\n\n", csrow
->mci
);
65 static void edac_mc_dump_mci(struct mem_ctl_info
*mci
)
67 debugf3("\tmci = %p\n", mci
);
68 debugf3("\tmci->mtype_cap = %lx\n", mci
->mtype_cap
);
69 debugf3("\tmci->edac_ctl_cap = %lx\n", mci
->edac_ctl_cap
);
70 debugf3("\tmci->edac_cap = %lx\n", mci
->edac_cap
);
71 debugf4("\tmci->edac_check = %p\n", mci
->edac_check
);
72 debugf3("\tmci->nr_csrows = %d, csrows = %p\n",
73 mci
->nr_csrows
, mci
->csrows
);
74 debugf3("\tdev = %p\n", mci
->dev
);
75 debugf3("\tmod_name:ctl_name = %s:%s\n", mci
->mod_name
, mci
->ctl_name
);
76 debugf3("\tpvt_info = %p\n\n", mci
->pvt_info
);
79 #endif /* CONFIG_EDAC_DEBUG */
81 /* 'ptr' points to a possibly unaligned item X such that sizeof(X) is 'size'.
82 * Adjust 'ptr' so that its alignment is at least as stringent as what the
83 * compiler would provide for X and return the aligned result.
85 * If 'size' is a constant, the compiler will optimize this whole function
86 * down to either a no-op or the addition of a constant to the value of 'ptr'.
88 char *edac_align_ptr(void *ptr
, unsigned size
)
92 /* Here we assume that the alignment of a "long long" is the most
93 * stringent alignment that the compiler will ever provide by default.
94 * As far as I know, this is a reasonable assumption.
96 if (size
> sizeof(long))
97 align
= sizeof(long long);
98 else if (size
> sizeof(int))
100 else if (size
> sizeof(short))
102 else if (size
> sizeof(char))
103 align
= sizeof(short);
112 return (char *)(((unsigned long)ptr
) + align
- r
);
116 * edac_mc_alloc: Allocate a struct mem_ctl_info structure
117 * @size_pvt: size of private storage needed
118 * @nr_csrows: Number of CWROWS needed for this MC
119 * @nr_chans: Number of channels for the MC
121 * Everything is kmalloc'ed as one big chunk - more efficient.
122 * Only can be used if all structures have the same lifetime - otherwise
123 * you have to allocate and initialize your own structures.
125 * Use edac_mc_free() to free mc structures allocated by this function.
128 * NULL allocation failed
129 * struct mem_ctl_info pointer
131 struct mem_ctl_info
*edac_mc_alloc(unsigned sz_pvt
, unsigned nr_csrows
,
134 struct mem_ctl_info
*mci
;
135 struct csrow_info
*csi
, *csrow
;
136 struct channel_info
*chi
, *chp
, *chan
;
141 /* Figure out the offsets of the various items from the start of an mc
142 * structure. We want the alignment of each item to be at least as
143 * stringent as what the compiler would provide if we could simply
144 * hardcode everything into a single struct.
146 mci
= (struct mem_ctl_info
*)0;
147 csi
= (struct csrow_info
*)edac_align_ptr(&mci
[1], sizeof(*csi
));
148 chi
= (struct channel_info
*)
149 edac_align_ptr(&csi
[nr_csrows
], sizeof(*chi
));
150 pvt
= edac_align_ptr(&chi
[nr_chans
* nr_csrows
], sz_pvt
);
151 size
= ((unsigned long)pvt
) + sz_pvt
;
153 if ((mci
= kmalloc(size
, GFP_KERNEL
)) == NULL
)
156 /* Adjust pointers so they point within the memory we just allocated
157 * rather than an imaginary chunk of memory located at address 0.
159 csi
= (struct csrow_info
*)(((char *)mci
) + ((unsigned long)csi
));
160 chi
= (struct channel_info
*)(((char *)mci
) + ((unsigned long)chi
));
161 pvt
= sz_pvt
? (((char *)mci
) + ((unsigned long)pvt
)) : NULL
;
163 memset(mci
, 0, size
); /* clear all fields */
166 mci
->nr_csrows
= nr_csrows
;
168 for (row
= 0; row
< nr_csrows
; row
++) {
170 csrow
->csrow_idx
= row
;
172 csrow
->nr_channels
= nr_chans
;
173 chp
= &chi
[row
* nr_chans
];
174 csrow
->channels
= chp
;
176 for (chn
= 0; chn
< nr_chans
; chn
++) {
178 chan
->chan_idx
= chn
;
183 mci
->op_state
= OP_ALLOC
;
188 EXPORT_SYMBOL_GPL(edac_mc_alloc
);
191 * edac_mc_free: Free a previously allocated 'mci' structure
192 * @mci: pointer to a struct mem_ctl_info structure
194 void edac_mc_free(struct mem_ctl_info
*mci
)
199 EXPORT_SYMBOL_GPL(edac_mc_free
);
201 static struct mem_ctl_info
*find_mci_by_dev(struct device
*dev
)
203 struct mem_ctl_info
*mci
;
204 struct list_head
*item
;
206 debugf3("%s()\n", __func__
);
208 list_for_each(item
, &mc_devices
) {
209 mci
= list_entry(item
, struct mem_ctl_info
, link
);
219 * handler for EDAC to check if NMI type handler has asserted interrupt
221 static int edac_mc_assert_error_check_and_clear(void)
225 if (edac_op_state
== EDAC_OPSTATE_POLL
)
228 old_state
= edac_err_assert
;
235 * edac_mc_workq_function
236 * performs the operation scheduled by a workq request
238 static void edac_mc_workq_function(struct work_struct
*work_req
)
240 struct delayed_work
*d_work
= (struct delayed_work
*)work_req
;
241 struct mem_ctl_info
*mci
= to_edac_mem_ctl_work(d_work
);
243 mutex_lock(&mem_ctls_mutex
);
245 /* Only poll controllers that are running polled and have a check */
246 if (edac_mc_assert_error_check_and_clear() && (mci
->edac_check
!= NULL
))
247 mci
->edac_check(mci
);
250 * FIXME: temp place holder for PCI checks,
251 * goes away when we break out PCI
253 edac_pci_do_parity_check();
255 mutex_unlock(&mem_ctls_mutex
);
258 queue_delayed_work(edac_workqueue
, &mci
->work
,
259 msecs_to_jiffies(edac_mc_get_poll_msec()));
263 * edac_mc_workq_setup
264 * initialize a workq item for this mci
265 * passing in the new delay period in msec
267 void edac_mc_workq_setup(struct mem_ctl_info
*mci
, unsigned msec
)
269 debugf0("%s()\n", __func__
);
271 INIT_DELAYED_WORK(&mci
->work
, edac_mc_workq_function
);
272 queue_delayed_work(edac_workqueue
, &mci
->work
, msecs_to_jiffies(msec
));
276 * edac_mc_workq_teardown
277 * stop the workq processing on this mci
279 void edac_mc_workq_teardown(struct mem_ctl_info
*mci
)
283 status
= cancel_delayed_work(&mci
->work
);
285 /* workq instance might be running, wait for it */
286 flush_workqueue(edac_workqueue
);
291 * edac_reset_delay_period
294 void edac_reset_delay_period(struct mem_ctl_info
*mci
, unsigned long value
)
296 mutex_lock(&mem_ctls_mutex
);
298 /* cancel the current workq request */
299 edac_mc_workq_teardown(mci
);
301 /* restart the workq request, with new delay value */
302 edac_mc_workq_setup(mci
, value
);
304 mutex_unlock(&mem_ctls_mutex
);
307 /* Return 0 on success, 1 on failure.
308 * Before calling this function, caller must
309 * assign a unique value to mci->mc_idx.
311 static int add_mc_to_global_list(struct mem_ctl_info
*mci
)
313 struct list_head
*item
, *insert_before
;
314 struct mem_ctl_info
*p
;
316 insert_before
= &mc_devices
;
318 if (unlikely((p
= find_mci_by_dev(mci
->dev
)) != NULL
))
321 list_for_each(item
, &mc_devices
) {
322 p
= list_entry(item
, struct mem_ctl_info
, link
);
324 if (p
->mc_idx
>= mci
->mc_idx
) {
325 if (unlikely(p
->mc_idx
== mci
->mc_idx
))
328 insert_before
= item
;
333 list_add_tail_rcu(&mci
->link
, insert_before
);
334 atomic_inc(&edac_handlers
);
338 edac_printk(KERN_WARNING
, EDAC_MC
,
339 "%s (%s) %s %s already assigned %d\n", p
->dev
->bus_id
,
340 dev_name(mci
), p
->mod_name
, p
->ctl_name
, p
->mc_idx
);
344 edac_printk(KERN_WARNING
, EDAC_MC
,
345 "bug in low-level driver: attempt to assign\n"
346 " duplicate mc_idx %d in %s()\n", p
->mc_idx
, __func__
);
350 static void complete_mc_list_del(struct rcu_head
*head
)
352 struct mem_ctl_info
*mci
;
354 mci
= container_of(head
, struct mem_ctl_info
, rcu
);
355 INIT_LIST_HEAD(&mci
->link
);
356 complete(&mci
->complete
);
359 static void del_mc_from_global_list(struct mem_ctl_info
*mci
)
361 atomic_dec(&edac_handlers
);
362 list_del_rcu(&mci
->link
);
363 init_completion(&mci
->complete
);
364 call_rcu(&mci
->rcu
, complete_mc_list_del
);
365 wait_for_completion(&mci
->complete
);
369 * edac_mc_find: Search for a mem_ctl_info structure whose index is 'idx'.
371 * If found, return a pointer to the structure.
374 * Caller must hold mem_ctls_mutex.
376 struct mem_ctl_info
*edac_mc_find(int idx
)
378 struct list_head
*item
;
379 struct mem_ctl_info
*mci
;
381 list_for_each(item
, &mc_devices
) {
382 mci
= list_entry(item
, struct mem_ctl_info
, link
);
384 if (mci
->mc_idx
>= idx
) {
385 if (mci
->mc_idx
== idx
)
395 EXPORT_SYMBOL(edac_mc_find
);
398 * edac_mc_add_mc: Insert the 'mci' structure into the mci global list and
399 * create sysfs entries associated with mci structure
400 * @mci: pointer to the mci structure to be added to the list
401 * @mc_idx: A unique numeric identifier to be assigned to the 'mci' structure.
408 /* FIXME - should a warning be printed if no error detection? correction? */
409 int edac_mc_add_mc(struct mem_ctl_info
*mci
, int mc_idx
)
411 debugf0("%s()\n", __func__
);
412 mci
->mc_idx
= mc_idx
;
413 #ifdef CONFIG_EDAC_DEBUG
414 if (edac_debug_level
>= 3)
415 edac_mc_dump_mci(mci
);
417 if (edac_debug_level
>= 4) {
420 for (i
= 0; i
< mci
->nr_csrows
; i
++) {
423 edac_mc_dump_csrow(&mci
->csrows
[i
]);
424 for (j
= 0; j
< mci
->csrows
[i
].nr_channels
; j
++)
425 edac_mc_dump_channel(&mci
->csrows
[i
].
430 mutex_lock(&mem_ctls_mutex
);
432 if (add_mc_to_global_list(mci
))
435 /* set load time so that error rate can be tracked */
436 mci
->start_time
= jiffies
;
438 if (edac_create_sysfs_mci_device(mci
)) {
439 edac_mc_printk(mci
, KERN_WARNING
,
440 "failed to create sysfs device\n");
444 /* If there IS a check routine, then we are running POLLED */
445 if (mci
->edac_check
!= NULL
) {
446 /* This instance is NOW RUNNING */
447 mci
->op_state
= OP_RUNNING_POLL
;
449 edac_mc_workq_setup(mci
, edac_mc_get_poll_msec());
451 mci
->op_state
= OP_RUNNING_INTERRUPT
;
454 /* Report action taken */
455 edac_mc_printk(mci
, KERN_INFO
, "Giving out device to %s %s: DEV %s\n",
456 mci
->mod_name
, mci
->ctl_name
, dev_name(mci
));
458 mutex_unlock(&mem_ctls_mutex
);
462 del_mc_from_global_list(mci
);
465 mutex_unlock(&mem_ctls_mutex
);
469 EXPORT_SYMBOL_GPL(edac_mc_add_mc
);
472 * edac_mc_del_mc: Remove sysfs entries for specified mci structure and
473 * remove mci structure from global list
474 * @pdev: Pointer to 'struct device' representing mci structure to remove.
476 * Return pointer to removed mci structure, or NULL if device not found.
478 struct mem_ctl_info
*edac_mc_del_mc(struct device
*dev
)
480 struct mem_ctl_info
*mci
;
482 debugf0("MC: %s()\n", __func__
);
483 mutex_lock(&mem_ctls_mutex
);
485 if ((mci
= find_mci_by_dev(dev
)) == NULL
) {
486 mutex_unlock(&mem_ctls_mutex
);
490 /* marking MCI offline */
491 mci
->op_state
= OP_OFFLINE
;
493 /* flush workq processes */
494 edac_mc_workq_teardown(mci
);
496 edac_remove_sysfs_mci_device(mci
);
497 del_mc_from_global_list(mci
);
498 mutex_unlock(&mem_ctls_mutex
);
499 edac_printk(KERN_INFO
, EDAC_MC
,
500 "Removed device %d for %s %s: DEV %s\n", mci
->mc_idx
,
501 mci
->mod_name
, mci
->ctl_name
, dev_name(mci
));
505 EXPORT_SYMBOL_GPL(edac_mc_del_mc
);
507 static void edac_mc_scrub_block(unsigned long page
, unsigned long offset
,
512 unsigned long flags
= 0;
514 debugf3("%s()\n", __func__
);
516 /* ECC error page was not in our memory. Ignore it. */
517 if (!pfn_valid(page
))
520 /* Find the actual page structure then map it and fix */
521 pg
= pfn_to_page(page
);
524 local_irq_save(flags
);
526 virt_addr
= kmap_atomic(pg
, KM_BOUNCE_READ
);
528 /* Perform architecture specific atomic scrub operation */
529 atomic_scrub(virt_addr
+ offset
, size
);
531 /* Unmap and complete */
532 kunmap_atomic(virt_addr
, KM_BOUNCE_READ
);
535 local_irq_restore(flags
);
538 /* FIXME - should return -1 */
539 int edac_mc_find_csrow_by_page(struct mem_ctl_info
*mci
, unsigned long page
)
541 struct csrow_info
*csrows
= mci
->csrows
;
544 debugf1("MC%d: %s(): 0x%lx\n", mci
->mc_idx
, __func__
, page
);
547 for (i
= 0; i
< mci
->nr_csrows
; i
++) {
548 struct csrow_info
*csrow
= &csrows
[i
];
550 if (csrow
->nr_pages
== 0)
553 debugf3("MC%d: %s(): first(0x%lx) page(0x%lx) last(0x%lx) "
554 "mask(0x%lx)\n", mci
->mc_idx
, __func__
,
555 csrow
->first_page
, page
, csrow
->last_page
,
558 if ((page
>= csrow
->first_page
) &&
559 (page
<= csrow
->last_page
) &&
560 ((page
& csrow
->page_mask
) ==
561 (csrow
->first_page
& csrow
->page_mask
))) {
568 edac_mc_printk(mci
, KERN_ERR
,
569 "could not look up page error address %lx\n",
570 (unsigned long)page
);
575 EXPORT_SYMBOL_GPL(edac_mc_find_csrow_by_page
);
577 /* FIXME - setable log (warning/emerg) levels */
578 /* FIXME - integrate with evlog: http://evlog.sourceforge.net/ */
579 void edac_mc_handle_ce(struct mem_ctl_info
*mci
,
580 unsigned long page_frame_number
,
581 unsigned long offset_in_page
, unsigned long syndrome
,
582 int row
, int channel
, const char *msg
)
584 unsigned long remapped_page
;
586 debugf3("MC%d: %s()\n", mci
->mc_idx
, __func__
);
588 /* FIXME - maybe make panic on INTERNAL ERROR an option */
589 if (row
>= mci
->nr_csrows
|| row
< 0) {
590 /* something is wrong */
591 edac_mc_printk(mci
, KERN_ERR
,
592 "INTERNAL ERROR: row out of range "
593 "(%d >= %d)\n", row
, mci
->nr_csrows
);
594 edac_mc_handle_ce_no_info(mci
, "INTERNAL ERROR");
598 if (channel
>= mci
->csrows
[row
].nr_channels
|| channel
< 0) {
599 /* something is wrong */
600 edac_mc_printk(mci
, KERN_ERR
,
601 "INTERNAL ERROR: channel out of range "
602 "(%d >= %d)\n", channel
,
603 mci
->csrows
[row
].nr_channels
);
604 edac_mc_handle_ce_no_info(mci
, "INTERNAL ERROR");
608 if (edac_mc_get_log_ce())
609 /* FIXME - put in DIMM location */
610 edac_mc_printk(mci
, KERN_WARNING
,
611 "CE page 0x%lx, offset 0x%lx, grain %d, syndrome "
612 "0x%lx, row %d, channel %d, label \"%s\": %s\n",
613 page_frame_number
, offset_in_page
,
614 mci
->csrows
[row
].grain
, syndrome
, row
, channel
,
615 mci
->csrows
[row
].channels
[channel
].label
, msg
);
618 mci
->csrows
[row
].ce_count
++;
619 mci
->csrows
[row
].channels
[channel
].ce_count
++;
621 if (mci
->scrub_mode
& SCRUB_SW_SRC
) {
623 * Some MC's can remap memory so that it is still available
624 * at a different address when PCI devices map into memory.
625 * MC's that can't do this lose the memory where PCI devices
626 * are mapped. This mapping is MC dependant and so we call
627 * back into the MC driver for it to map the MC page to
628 * a physical (CPU) page which can then be mapped to a virtual
629 * page - which can then be scrubbed.
631 remapped_page
= mci
->ctl_page_to_phys
?
632 mci
->ctl_page_to_phys(mci
, page_frame_number
) :
635 edac_mc_scrub_block(remapped_page
, offset_in_page
,
636 mci
->csrows
[row
].grain
);
640 EXPORT_SYMBOL_GPL(edac_mc_handle_ce
);
642 void edac_mc_handle_ce_no_info(struct mem_ctl_info
*mci
, const char *msg
)
644 if (edac_mc_get_log_ce())
645 edac_mc_printk(mci
, KERN_WARNING
,
646 "CE - no information available: %s\n", msg
);
648 mci
->ce_noinfo_count
++;
652 EXPORT_SYMBOL_GPL(edac_mc_handle_ce_no_info
);
654 void edac_mc_handle_ue(struct mem_ctl_info
*mci
,
655 unsigned long page_frame_number
,
656 unsigned long offset_in_page
, int row
, const char *msg
)
658 int len
= EDAC_MC_LABEL_LEN
* 4;
659 char labels
[len
+ 1];
664 debugf3("MC%d: %s()\n", mci
->mc_idx
, __func__
);
666 /* FIXME - maybe make panic on INTERNAL ERROR an option */
667 if (row
>= mci
->nr_csrows
|| row
< 0) {
668 /* something is wrong */
669 edac_mc_printk(mci
, KERN_ERR
,
670 "INTERNAL ERROR: row out of range "
671 "(%d >= %d)\n", row
, mci
->nr_csrows
);
672 edac_mc_handle_ue_no_info(mci
, "INTERNAL ERROR");
676 chars
= snprintf(pos
, len
+ 1, "%s",
677 mci
->csrows
[row
].channels
[0].label
);
681 for (chan
= 1; (chan
< mci
->csrows
[row
].nr_channels
) && (len
> 0);
683 chars
= snprintf(pos
, len
+ 1, ":%s",
684 mci
->csrows
[row
].channels
[chan
].label
);
689 if (edac_mc_get_log_ue())
690 edac_mc_printk(mci
, KERN_EMERG
,
691 "UE page 0x%lx, offset 0x%lx, grain %d, row %d, "
692 "labels \"%s\": %s\n", page_frame_number
,
693 offset_in_page
, mci
->csrows
[row
].grain
, row
,
696 if (edac_mc_get_panic_on_ue())
697 panic("EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, "
698 "row %d, labels \"%s\": %s\n", mci
->mc_idx
,
699 page_frame_number
, offset_in_page
,
700 mci
->csrows
[row
].grain
, row
, labels
, msg
);
703 mci
->csrows
[row
].ue_count
++;
706 EXPORT_SYMBOL_GPL(edac_mc_handle_ue
);
708 void edac_mc_handle_ue_no_info(struct mem_ctl_info
*mci
, const char *msg
)
710 if (edac_mc_get_panic_on_ue())
711 panic("EDAC MC%d: Uncorrected Error", mci
->mc_idx
);
713 if (edac_mc_get_log_ue())
714 edac_mc_printk(mci
, KERN_WARNING
,
715 "UE - no information available: %s\n", msg
);
716 mci
->ue_noinfo_count
++;
720 EXPORT_SYMBOL_GPL(edac_mc_handle_ue_no_info
);
722 /*************************************************************
723 * On Fully Buffered DIMM modules, this help function is
724 * called to process UE events
726 void edac_mc_handle_fbd_ue(struct mem_ctl_info
*mci
,
728 unsigned int channela
,
729 unsigned int channelb
, char *msg
)
731 int len
= EDAC_MC_LABEL_LEN
* 4;
732 char labels
[len
+ 1];
736 if (csrow
>= mci
->nr_csrows
) {
737 /* something is wrong */
738 edac_mc_printk(mci
, KERN_ERR
,
739 "INTERNAL ERROR: row out of range (%d >= %d)\n",
740 csrow
, mci
->nr_csrows
);
741 edac_mc_handle_ue_no_info(mci
, "INTERNAL ERROR");
745 if (channela
>= mci
->csrows
[csrow
].nr_channels
) {
746 /* something is wrong */
747 edac_mc_printk(mci
, KERN_ERR
,
748 "INTERNAL ERROR: channel-a out of range "
750 channela
, mci
->csrows
[csrow
].nr_channels
);
751 edac_mc_handle_ue_no_info(mci
, "INTERNAL ERROR");
755 if (channelb
>= mci
->csrows
[csrow
].nr_channels
) {
756 /* something is wrong */
757 edac_mc_printk(mci
, KERN_ERR
,
758 "INTERNAL ERROR: channel-b out of range "
760 channelb
, mci
->csrows
[csrow
].nr_channels
);
761 edac_mc_handle_ue_no_info(mci
, "INTERNAL ERROR");
766 mci
->csrows
[csrow
].ue_count
++;
768 /* Generate the DIMM labels from the specified channels */
769 chars
= snprintf(pos
, len
+ 1, "%s",
770 mci
->csrows
[csrow
].channels
[channela
].label
);
773 chars
= snprintf(pos
, len
+ 1, "-%s",
774 mci
->csrows
[csrow
].channels
[channelb
].label
);
776 if (edac_mc_get_log_ue())
777 edac_mc_printk(mci
, KERN_EMERG
,
778 "UE row %d, channel-a= %d channel-b= %d "
779 "labels \"%s\": %s\n", csrow
, channela
, channelb
,
782 if (edac_mc_get_panic_on_ue())
783 panic("UE row %d, channel-a= %d channel-b= %d "
784 "labels \"%s\": %s\n", csrow
, channela
,
785 channelb
, labels
, msg
);
788 EXPORT_SYMBOL(edac_mc_handle_fbd_ue
);
790 /*************************************************************
791 * On Fully Buffered DIMM modules, this help function is
792 * called to process CE events
794 void edac_mc_handle_fbd_ce(struct mem_ctl_info
*mci
,
795 unsigned int csrow
, unsigned int channel
, char *msg
)
798 /* Ensure boundary values */
799 if (csrow
>= mci
->nr_csrows
) {
800 /* something is wrong */
801 edac_mc_printk(mci
, KERN_ERR
,
802 "INTERNAL ERROR: row out of range (%d >= %d)\n",
803 csrow
, mci
->nr_csrows
);
804 edac_mc_handle_ce_no_info(mci
, "INTERNAL ERROR");
807 if (channel
>= mci
->csrows
[csrow
].nr_channels
) {
808 /* something is wrong */
809 edac_mc_printk(mci
, KERN_ERR
,
810 "INTERNAL ERROR: channel out of range (%d >= %d)\n",
811 channel
, mci
->csrows
[csrow
].nr_channels
);
812 edac_mc_handle_ce_no_info(mci
, "INTERNAL ERROR");
816 if (edac_mc_get_log_ce())
817 /* FIXME - put in DIMM location */
818 edac_mc_printk(mci
, KERN_WARNING
,
819 "CE row %d, channel %d, label \"%s\": %s\n",
821 mci
->csrows
[csrow
].channels
[channel
].label
, msg
);
824 mci
->csrows
[csrow
].ce_count
++;
825 mci
->csrows
[csrow
].channels
[channel
].ce_count
++;
828 EXPORT_SYMBOL(edac_mc_handle_fbd_ce
);
831 * Iterate over all MC instances and check for ECC, et al, errors
833 void edac_check_mc_devices(void)
835 struct list_head
*item
;
836 struct mem_ctl_info
*mci
;
838 debugf3("%s()\n", __func__
);
839 mutex_lock(&mem_ctls_mutex
);
841 list_for_each(item
, &mc_devices
) {
842 mci
= list_entry(item
, struct mem_ctl_info
, link
);
844 if (mci
->edac_check
!= NULL
)
845 mci
->edac_check(mci
);
848 mutex_unlock(&mem_ctls_mutex
);