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"
38 /* lock to memory controller's control array */
39 static DEFINE_MUTEX(mem_ctls_mutex);
40 static struct list_head mc_devices = LIST_HEAD_INIT(mc_devices);
42 #ifdef CONFIG_EDAC_DEBUG
44 static void edac_mc_dump_channel(struct channel_info *chan)
46 debugf4("\tchannel = %p\n", chan);
47 debugf4("\tchannel->chan_idx = %d\n", chan->chan_idx);
48 debugf4("\tchannel->ce_count = %d\n", chan->ce_count);
49 debugf4("\tchannel->label = '%s'\n", chan->label);
50 debugf4("\tchannel->csrow = %p\n\n", chan->csrow);
53 static void edac_mc_dump_csrow(struct csrow_info *csrow)
55 debugf4("\tcsrow = %p\n", csrow);
56 debugf4("\tcsrow->csrow_idx = %d\n", csrow->csrow_idx);
57 debugf4("\tcsrow->first_page = 0x%lx\n",
59 debugf4("\tcsrow->last_page = 0x%lx\n", csrow->last_page);
60 debugf4("\tcsrow->page_mask = 0x%lx\n", csrow->page_mask);
61 debugf4("\tcsrow->nr_pages = 0x%x\n", csrow->nr_pages);
62 debugf4("\tcsrow->nr_channels = %d\n",
64 debugf4("\tcsrow->channels = %p\n", csrow->channels);
65 debugf4("\tcsrow->mci = %p\n\n", csrow->mci);
68 static void edac_mc_dump_mci(struct mem_ctl_info *mci)
70 debugf3("\tmci = %p\n", mci);
71 debugf3("\tmci->mtype_cap = %lx\n", mci->mtype_cap);
72 debugf3("\tmci->edac_ctl_cap = %lx\n", mci->edac_ctl_cap);
73 debugf3("\tmci->edac_cap = %lx\n", mci->edac_cap);
74 debugf4("\tmci->edac_check = %p\n", mci->edac_check);
75 debugf3("\tmci->nr_csrows = %d, csrows = %p\n",
76 mci->nr_csrows, mci->csrows);
77 debugf3("\tdev = %p\n", mci->dev);
78 debugf3("\tmod_name:ctl_name = %s:%s\n",
79 mci->mod_name, mci->ctl_name);
80 debugf3("\tpvt_info = %p\n\n", mci->pvt_info);
83 #endif /* CONFIG_EDAC_DEBUG */
85 /* 'ptr' points to a possibly unaligned item X such that sizeof(X) is 'size'.
86 * Adjust 'ptr' so that its alignment is at least as stringent as what the
87 * compiler would provide for X and return the aligned result.
89 * If 'size' is a constant, the compiler will optimize this whole function
90 * down to either a no-op or the addition of a constant to the value of 'ptr'.
92 char * edac_align_ptr(void *ptr, unsigned size)
96 /* Here we assume that the alignment of a "long long" is the most
97 * stringent alignment that the compiler will ever provide by default.
98 * As far as I know, this is a reasonable assumption.
100 if (size > sizeof(long))
101 align = sizeof(long long);
102 else if (size > sizeof(int))
103 align = sizeof(long);
104 else if (size > sizeof(short))
106 else if (size > sizeof(char))
107 align = sizeof(short);
116 return (char *) (((unsigned long) ptr) + align - r);
120 * edac_mc_alloc: Allocate a struct mem_ctl_info structure
121 * @size_pvt: size of private storage needed
122 * @nr_csrows: Number of CWROWS needed for this MC
123 * @nr_chans: Number of channels for the MC
125 * Everything is kmalloc'ed as one big chunk - more efficient.
126 * Only can be used if all structures have the same lifetime - otherwise
127 * you have to allocate and initialize your own structures.
129 * Use edac_mc_free() to free mc structures allocated by this function.
132 * NULL allocation failed
133 * struct mem_ctl_info pointer
135 struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows,
138 struct mem_ctl_info *mci;
139 struct csrow_info *csi, *csrow;
140 struct channel_info *chi, *chp, *chan;
145 /* Figure out the offsets of the various items from the start of an mc
146 * structure. We want the alignment of each item to be at least as
147 * stringent as what the compiler would provide if we could simply
148 * hardcode everything into a single struct.
150 mci = (struct mem_ctl_info *) 0;
151 csi = (struct csrow_info *)edac_align_ptr(&mci[1], sizeof(*csi));
152 chi = (struct channel_info *)
153 edac_align_ptr(&csi[nr_csrows], sizeof(*chi));
154 pvt = edac_align_ptr(&chi[nr_chans * nr_csrows], sz_pvt);
155 size = ((unsigned long) pvt) + sz_pvt;
157 if ((mci = kmalloc(size, GFP_KERNEL)) == NULL)
160 /* Adjust pointers so they point within the memory we just allocated
161 * rather than an imaginary chunk of memory located at address 0.
163 csi = (struct csrow_info *) (((char *) mci) + ((unsigned long) csi));
164 chi = (struct channel_info *) (((char *) mci) + ((unsigned long) chi));
165 pvt = sz_pvt ? (((char *) mci) + ((unsigned long) pvt)) : NULL;
167 memset(mci, 0, size); /* clear all fields */
170 mci->nr_csrows = nr_csrows;
172 for (row = 0; row < nr_csrows; row++) {
174 csrow->csrow_idx = row;
176 csrow->nr_channels = nr_chans;
177 chp = &chi[row * nr_chans];
178 csrow->channels = chp;
180 for (chn = 0; chn < nr_chans; chn++) {
182 chan->chan_idx = chn;
187 mci->op_state = OP_ALLOC;
191 EXPORT_SYMBOL_GPL(edac_mc_alloc);
194 * edac_mc_free: Free a previously allocated 'mci' structure
195 * @mci: pointer to a struct mem_ctl_info structure
197 void edac_mc_free(struct mem_ctl_info *mci)
201 EXPORT_SYMBOL_GPL(edac_mc_free);
203 static struct mem_ctl_info *find_mci_by_dev(struct device *dev)
205 struct mem_ctl_info *mci;
206 struct list_head *item;
208 debugf3("%s()\n", __func__);
210 list_for_each(item, &mc_devices) {
211 mci = list_entry(item, struct mem_ctl_info, link);
221 * handler for EDAC to check if NMI type handler has asserted interrupt
223 static int edac_mc_assert_error_check_and_clear(void)
227 if(edac_op_state == EDAC_OPSTATE_POLL)
230 vreg = atomic_read(&edac_err_assert);
232 atomic_set(&edac_err_assert, 0);
240 * edac_mc_workq_function
241 * performs the operation scheduled by a workq request
243 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20))
244 static void edac_mc_workq_function(struct work_struct *work_req)
246 struct delayed_work *d_work = (struct delayed_work*) work_req;
247 struct mem_ctl_info *mci = to_edac_mem_ctl_work(d_work);
249 static void edac_mc_workq_function(void *ptr)
251 struct mem_ctl_info *mci = (struct mem_ctl_info *) ptr;
254 mutex_lock(&mem_ctls_mutex);
256 /* Only poll controllers that are running polled and have a check */
257 if (edac_mc_assert_error_check_and_clear() && (mci->edac_check != NULL))
258 mci->edac_check(mci);
261 * FIXME: temp place holder for PCI checks,
262 * goes away when we break out PCI
264 edac_pci_do_parity_check();
266 mutex_unlock(&mem_ctls_mutex);
269 queue_delayed_work(edac_workqueue, &mci->work, edac_mc_get_poll_msec());
273 * edac_mc_workq_setup
274 * initialize a workq item for this mci
275 * passing in the new delay period in msec
277 void edac_mc_workq_setup(struct mem_ctl_info *mci, unsigned msec)
279 debugf0("%s()\n", __func__);
281 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20))
282 INIT_DELAYED_WORK(&mci->work, edac_mc_workq_function);
284 INIT_WORK(&mci->work, edac_mc_workq_function, mci);
286 queue_delayed_work(edac_workqueue, &mci->work, msecs_to_jiffies(msec));
290 * edac_mc_workq_teardown
291 * stop the workq processing on this mci
293 void edac_mc_workq_teardown(struct mem_ctl_info *mci)
297 status = cancel_delayed_work(&mci->work);
299 /* workq instance might be running, wait for it */
300 flush_workqueue(edac_workqueue);
305 * edac_reset_delay_period
308 void edac_reset_delay_period(struct mem_ctl_info *mci, unsigned long value)
310 mutex_lock(&mem_ctls_mutex);
312 /* cancel the current workq request */
313 edac_mc_workq_teardown(mci);
315 /* restart the workq request, with new delay value */
316 edac_mc_workq_setup(mci, value);
318 mutex_unlock(&mem_ctls_mutex);
321 /* Return 0 on success, 1 on failure.
322 * Before calling this function, caller must
323 * assign a unique value to mci->mc_idx.
325 static int add_mc_to_global_list (struct mem_ctl_info *mci)
327 struct list_head *item, *insert_before;
328 struct mem_ctl_info *p;
330 insert_before = &mc_devices;
332 if (unlikely((p = find_mci_by_dev(mci->dev)) != NULL))
335 list_for_each(item, &mc_devices) {
336 p = list_entry(item, struct mem_ctl_info, link);
338 if (p->mc_idx >= mci->mc_idx) {
339 if (unlikely(p->mc_idx == mci->mc_idx))
342 insert_before = item;
347 list_add_tail_rcu(&mci->link, insert_before);
348 atomic_inc(&edac_handlers);
352 edac_printk(KERN_WARNING, EDAC_MC,
353 "%s (%s) %s %s already assigned %d\n", p->dev->bus_id,
354 dev_name(mci), p->mod_name, p->ctl_name, p->mc_idx);
358 edac_printk(KERN_WARNING, EDAC_MC,
359 "bug in low-level driver: attempt to assign\n"
360 " duplicate mc_idx %d in %s()\n", p->mc_idx, __func__);
364 static void complete_mc_list_del(struct rcu_head *head)
366 struct mem_ctl_info *mci;
368 mci = container_of(head, struct mem_ctl_info, rcu);
369 INIT_LIST_HEAD(&mci->link);
370 complete(&mci->complete);
373 static void del_mc_from_global_list(struct mem_ctl_info *mci)
375 atomic_dec(&edac_handlers);
376 list_del_rcu(&mci->link);
377 init_completion(&mci->complete);
378 call_rcu(&mci->rcu, complete_mc_list_del);
379 wait_for_completion(&mci->complete);
383 * edac_mc_find: Search for a mem_ctl_info structure whose index is 'idx'.
385 * If found, return a pointer to the structure.
388 * Caller must hold mem_ctls_mutex.
390 struct mem_ctl_info * edac_mc_find(int idx)
392 struct list_head *item;
393 struct mem_ctl_info *mci;
395 list_for_each(item, &mc_devices) {
396 mci = list_entry(item, struct mem_ctl_info, link);
398 if (mci->mc_idx >= idx) {
399 if (mci->mc_idx == idx)
408 EXPORT_SYMBOL(edac_mc_find);
411 * edac_mc_add_mc: Insert the 'mci' structure into the mci global list and
412 * create sysfs entries associated with mci structure
413 * @mci: pointer to the mci structure to be added to the list
414 * @mc_idx: A unique numeric identifier to be assigned to the 'mci' structure.
421 /* FIXME - should a warning be printed if no error detection? correction? */
422 int edac_mc_add_mc(struct mem_ctl_info *mci, int mc_idx)
424 debugf0("%s()\n", __func__);
425 mci->mc_idx = mc_idx;
426 #ifdef CONFIG_EDAC_DEBUG
427 if (edac_debug_level >= 3)
428 edac_mc_dump_mci(mci);
430 if (edac_debug_level >= 4) {
433 for (i = 0; i < mci->nr_csrows; i++) {
436 edac_mc_dump_csrow(&mci->csrows[i]);
437 for (j = 0; j < mci->csrows[i].nr_channels; j++)
438 edac_mc_dump_channel(
439 &mci->csrows[i].channels[j]);
443 mutex_lock(&mem_ctls_mutex);
445 if (add_mc_to_global_list(mci))
448 /* set load time so that error rate can be tracked */
449 mci->start_time = jiffies;
451 if (edac_create_sysfs_mci_device(mci)) {
452 edac_mc_printk(mci, KERN_WARNING,
453 "failed to create sysfs device\n");
457 /* If there IS a check routine, then we are running POLLED */
458 if (mci->edac_check != NULL) {
459 /* This instance is NOW RUNNING */
460 mci->op_state = OP_RUNNING_POLL;
462 edac_mc_workq_setup(mci, edac_mc_get_poll_msec());
464 mci->op_state = OP_RUNNING_INTERRUPT;
467 /* Report action taken */
468 edac_mc_printk(mci, KERN_INFO, "Giving out device to %s %s: DEV %s\n",
469 mci->mod_name, mci->ctl_name, dev_name(mci));
471 mutex_unlock(&mem_ctls_mutex);
475 del_mc_from_global_list(mci);
478 mutex_unlock(&mem_ctls_mutex);
481 EXPORT_SYMBOL_GPL(edac_mc_add_mc);
484 * edac_mc_del_mc: Remove sysfs entries for specified mci structure and
485 * remove mci structure from global list
486 * @pdev: Pointer to 'struct device' representing mci structure to remove.
488 * Return pointer to removed mci structure, or NULL if device not found.
490 struct mem_ctl_info * edac_mc_del_mc(struct device *dev)
492 struct mem_ctl_info *mci;
494 debugf0("MC: %s()\n", __func__);
495 mutex_lock(&mem_ctls_mutex);
497 if ((mci = find_mci_by_dev(dev)) == NULL) {
498 mutex_unlock(&mem_ctls_mutex);
502 /* marking MCI offline */
503 mci->op_state = OP_OFFLINE;
505 /* flush workq processes */
506 edac_mc_workq_teardown(mci);
508 edac_remove_sysfs_mci_device(mci);
509 del_mc_from_global_list(mci);
510 mutex_unlock(&mem_ctls_mutex);
511 edac_printk(KERN_INFO, EDAC_MC,
512 "Removed device %d for %s %s: DEV %s\n", mci->mc_idx,
513 mci->mod_name, mci->ctl_name, dev_name(mci));
516 EXPORT_SYMBOL_GPL(edac_mc_del_mc);
518 static void edac_mc_scrub_block(unsigned long page, unsigned long offset,
523 unsigned long flags = 0;
525 debugf3("%s()\n", __func__);
527 /* ECC error page was not in our memory. Ignore it. */
531 /* Find the actual page structure then map it and fix */
532 pg = pfn_to_page(page);
535 local_irq_save(flags);
537 virt_addr = kmap_atomic(pg, KM_BOUNCE_READ);
539 /* Perform architecture specific atomic scrub operation */
540 atomic_scrub(virt_addr + offset, size);
542 /* Unmap and complete */
543 kunmap_atomic(virt_addr, KM_BOUNCE_READ);
546 local_irq_restore(flags);
549 /* FIXME - should return -1 */
550 int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, unsigned long page)
552 struct csrow_info *csrows = mci->csrows;
555 debugf1("MC%d: %s(): 0x%lx\n", mci->mc_idx, __func__, page);
558 for (i = 0; i < mci->nr_csrows; i++) {
559 struct csrow_info *csrow = &csrows[i];
561 if (csrow->nr_pages == 0)
564 debugf3("MC%d: %s(): first(0x%lx) page(0x%lx) last(0x%lx) "
565 "mask(0x%lx)\n", mci->mc_idx, __func__,
566 csrow->first_page, page, csrow->last_page,
569 if ((page >= csrow->first_page) &&
570 (page <= csrow->last_page) &&
571 ((page & csrow->page_mask) ==
572 (csrow->first_page & csrow->page_mask))) {
579 edac_mc_printk(mci, KERN_ERR,
580 "could not look up page error address %lx\n",
581 (unsigned long) page);
585 EXPORT_SYMBOL_GPL(edac_mc_find_csrow_by_page);
587 /* FIXME - setable log (warning/emerg) levels */
588 /* FIXME - integrate with evlog: http://evlog.sourceforge.net/ */
589 void edac_mc_handle_ce(struct mem_ctl_info *mci,
590 unsigned long page_frame_number, unsigned long offset_in_page,
591 unsigned long syndrome, int row, int channel, const char *msg)
593 unsigned long remapped_page;
595 debugf3("MC%d: %s()\n", mci->mc_idx, __func__);
597 /* FIXME - maybe make panic on INTERNAL ERROR an option */
598 if (row >= mci->nr_csrows || row < 0) {
599 /* something is wrong */
600 edac_mc_printk(mci, KERN_ERR,
601 "INTERNAL ERROR: row out of range "
602 "(%d >= %d)\n", row, mci->nr_csrows);
603 edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
607 if (channel >= mci->csrows[row].nr_channels || channel < 0) {
608 /* something is wrong */
609 edac_mc_printk(mci, KERN_ERR,
610 "INTERNAL ERROR: channel out of range "
611 "(%d >= %d)\n", channel,
612 mci->csrows[row].nr_channels);
613 edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
617 if (edac_get_log_ce())
618 /* FIXME - put in DIMM location */
619 edac_mc_printk(mci, KERN_WARNING,
620 "CE page 0x%lx, offset 0x%lx, grain %d, syndrome "
621 "0x%lx, row %d, channel %d, label \"%s\": %s\n",
622 page_frame_number, offset_in_page,
623 mci->csrows[row].grain, syndrome, row, channel,
624 mci->csrows[row].channels[channel].label, msg);
627 mci->csrows[row].ce_count++;
628 mci->csrows[row].channels[channel].ce_count++;
630 if (mci->scrub_mode & SCRUB_SW_SRC) {
632 * Some MC's can remap memory so that it is still available
633 * at a different address when PCI devices map into memory.
634 * MC's that can't do this lose the memory where PCI devices
635 * are mapped. This mapping is MC dependant and so we call
636 * back into the MC driver for it to map the MC page to
637 * a physical (CPU) page which can then be mapped to a virtual
638 * page - which can then be scrubbed.
640 remapped_page = mci->ctl_page_to_phys ?
641 mci->ctl_page_to_phys(mci, page_frame_number) :
644 edac_mc_scrub_block(remapped_page, offset_in_page,
645 mci->csrows[row].grain);
648 EXPORT_SYMBOL_GPL(edac_mc_handle_ce);
650 void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, const char *msg)
652 if (edac_get_log_ce())
653 edac_mc_printk(mci, KERN_WARNING,
654 "CE - no information available: %s\n", msg);
656 mci->ce_noinfo_count++;
659 EXPORT_SYMBOL_GPL(edac_mc_handle_ce_no_info);
661 void edac_mc_handle_ue(struct mem_ctl_info *mci,
662 unsigned long page_frame_number, unsigned long offset_in_page,
663 int row, const char *msg)
665 int len = EDAC_MC_LABEL_LEN * 4;
666 char labels[len + 1];
671 debugf3("MC%d: %s()\n", mci->mc_idx, __func__);
673 /* FIXME - maybe make panic on INTERNAL ERROR an option */
674 if (row >= mci->nr_csrows || row < 0) {
675 /* something is wrong */
676 edac_mc_printk(mci, KERN_ERR,
677 "INTERNAL ERROR: row out of range "
678 "(%d >= %d)\n", row, mci->nr_csrows);
679 edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
683 chars = snprintf(pos, len + 1, "%s",
684 mci->csrows[row].channels[0].label);
688 for (chan = 1; (chan < mci->csrows[row].nr_channels) && (len > 0);
690 chars = snprintf(pos, len + 1, ":%s",
691 mci->csrows[row].channels[chan].label);
696 if (edac_get_log_ue())
697 edac_mc_printk(mci, KERN_EMERG,
698 "UE page 0x%lx, offset 0x%lx, grain %d, row %d, "
699 "labels \"%s\": %s\n", page_frame_number,
700 offset_in_page, mci->csrows[row].grain, row, labels,
703 if (edac_get_panic_on_ue())
704 panic("EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, "
705 "row %d, labels \"%s\": %s\n", mci->mc_idx,
706 page_frame_number, offset_in_page,
707 mci->csrows[row].grain, row, labels, msg);
710 mci->csrows[row].ue_count++;
712 EXPORT_SYMBOL_GPL(edac_mc_handle_ue);
714 void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, const char *msg)
716 if (edac_get_panic_on_ue())
717 panic("EDAC MC%d: Uncorrected Error", mci->mc_idx);
719 if (edac_get_log_ue())
720 edac_mc_printk(mci, KERN_WARNING,
721 "UE - no information available: %s\n", msg);
722 mci->ue_noinfo_count++;
725 EXPORT_SYMBOL_GPL(edac_mc_handle_ue_no_info);
728 /*************************************************************
729 * On Fully Buffered DIMM modules, this help function is
730 * called to process UE events
732 void edac_mc_handle_fbd_ue(struct mem_ctl_info *mci,
734 unsigned int channela,
735 unsigned int channelb,
738 int len = EDAC_MC_LABEL_LEN * 4;
739 char labels[len + 1];
743 if (csrow >= mci->nr_csrows) {
744 /* something is wrong */
745 edac_mc_printk(mci, KERN_ERR,
746 "INTERNAL ERROR: row out of range (%d >= %d)\n",
747 csrow, mci->nr_csrows);
748 edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
752 if (channela >= mci->csrows[csrow].nr_channels) {
753 /* something is wrong */
754 edac_mc_printk(mci, KERN_ERR,
755 "INTERNAL ERROR: channel-a out of range "
757 channela, mci->csrows[csrow].nr_channels);
758 edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
762 if (channelb >= mci->csrows[csrow].nr_channels) {
763 /* something is wrong */
764 edac_mc_printk(mci, KERN_ERR,
765 "INTERNAL ERROR: channel-b out of range "
767 channelb, mci->csrows[csrow].nr_channels);
768 edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
773 mci->csrows[csrow].ue_count++;
775 /* Generate the DIMM labels from the specified channels */
776 chars = snprintf(pos, len + 1, "%s",
777 mci->csrows[csrow].channels[channela].label);
778 len -= chars; pos += chars;
779 chars = snprintf(pos, len + 1, "-%s",
780 mci->csrows[csrow].channels[channelb].label);
782 if (edac_get_log_ue())
783 edac_mc_printk(mci, KERN_EMERG,
784 "UE row %d, channel-a= %d channel-b= %d "
785 "labels \"%s\": %s\n", csrow, channela, channelb,
788 if (edac_get_panic_on_ue())
789 panic("UE row %d, channel-a= %d channel-b= %d "
790 "labels \"%s\": %s\n", csrow, channela,
791 channelb, labels, msg);
793 EXPORT_SYMBOL(edac_mc_handle_fbd_ue);
795 /*************************************************************
796 * On Fully Buffered DIMM modules, this help function is
797 * called to process CE events
799 void edac_mc_handle_fbd_ce(struct mem_ctl_info *mci,
801 unsigned int channel,
805 /* Ensure boundary values */
806 if (csrow >= mci->nr_csrows) {
807 /* something is wrong */
808 edac_mc_printk(mci, KERN_ERR,
809 "INTERNAL ERROR: row out of range (%d >= %d)\n",
810 csrow, mci->nr_csrows);
811 edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
814 if (channel >= mci->csrows[csrow].nr_channels) {
815 /* something is wrong */
816 edac_mc_printk(mci, KERN_ERR,
817 "INTERNAL ERROR: channel out of range (%d >= %d)\n",
818 channel, mci->csrows[csrow].nr_channels);
819 edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
823 if (edac_get_log_ce())
824 /* FIXME - put in DIMM location */
825 edac_mc_printk(mci, KERN_WARNING,
826 "CE row %d, channel %d, label \"%s\": %s\n",
828 mci->csrows[csrow].channels[channel].label,
832 mci->csrows[csrow].ce_count++;
833 mci->csrows[csrow].channels[channel].ce_count++;
835 EXPORT_SYMBOL(edac_mc_handle_fbd_ce);
839 * Iterate over all MC instances and check for ECC, et al, errors
841 void edac_check_mc_devices(void)
843 struct list_head *item;
844 struct mem_ctl_info *mci;
846 debugf3("%s()\n", __func__);
847 mutex_lock(&mem_ctls_mutex);
849 list_for_each(item, &mc_devices) {
850 mci = list_entry(item, struct mem_ctl_info, link);
852 if (mci->edac_check != NULL)
853 mci->edac_check(mci);
856 mutex_unlock(&mem_ctls_mutex);