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);