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 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20))
239 static void edac_mc_workq_function(struct work_struct *work_req)
241 struct delayed_work *d_work = (struct delayed_work *)work_req;
242 struct mem_ctl_info *mci = to_edac_mem_ctl_work(d_work);
244 static void edac_mc_workq_function(void *ptr)
246 struct mem_ctl_info *mci = (struct mem_ctl_info *)ptr;
249 mutex_lock(&mem_ctls_mutex);
251 /* Only poll controllers that are running polled and have a check */
252 if (edac_mc_assert_error_check_and_clear() && (mci->edac_check != NULL))
253 mci->edac_check(mci);
256 * FIXME: temp place holder for PCI checks,
257 * goes away when we break out PCI
259 edac_pci_do_parity_check();
261 mutex_unlock(&mem_ctls_mutex);
264 queue_delayed_work(edac_workqueue, &mci->work,
265 msecs_to_jiffies(edac_mc_get_poll_msec()));
269 * edac_mc_workq_setup
270 * initialize a workq item for this mci
271 * passing in the new delay period in msec
273 void edac_mc_workq_setup(struct mem_ctl_info *mci, unsigned msec)
275 debugf0("%s()\n", __func__);
277 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20))
278 INIT_DELAYED_WORK(&mci->work, edac_mc_workq_function);
280 INIT_WORK(&mci->work, edac_mc_workq_function, mci);
282 queue_delayed_work(edac_workqueue, &mci->work, msecs_to_jiffies(msec));
286 * edac_mc_workq_teardown
287 * stop the workq processing on this mci
289 void edac_mc_workq_teardown(struct mem_ctl_info *mci)
293 status = cancel_delayed_work(&mci->work);
295 /* workq instance might be running, wait for it */
296 flush_workqueue(edac_workqueue);
301 * edac_reset_delay_period
304 void edac_reset_delay_period(struct mem_ctl_info *mci, unsigned long value)
306 mutex_lock(&mem_ctls_mutex);
308 /* cancel the current workq request */
309 edac_mc_workq_teardown(mci);
311 /* restart the workq request, with new delay value */
312 edac_mc_workq_setup(mci, value);
314 mutex_unlock(&mem_ctls_mutex);
317 /* Return 0 on success, 1 on failure.
318 * Before calling this function, caller must
319 * assign a unique value to mci->mc_idx.
321 static int add_mc_to_global_list(struct mem_ctl_info *mci)
323 struct list_head *item, *insert_before;
324 struct mem_ctl_info *p;
326 insert_before = &mc_devices;
328 if (unlikely((p = find_mci_by_dev(mci->dev)) != NULL))
331 list_for_each(item, &mc_devices) {
332 p = list_entry(item, struct mem_ctl_info, link);
334 if (p->mc_idx >= mci->mc_idx) {
335 if (unlikely(p->mc_idx == mci->mc_idx))
338 insert_before = item;
343 list_add_tail_rcu(&mci->link, insert_before);
344 atomic_inc(&edac_handlers);
348 edac_printk(KERN_WARNING, EDAC_MC,
349 "%s (%s) %s %s already assigned %d\n", p->dev->bus_id,
350 dev_name(mci), p->mod_name, p->ctl_name, p->mc_idx);
354 edac_printk(KERN_WARNING, EDAC_MC,
355 "bug in low-level driver: attempt to assign\n"
356 " duplicate mc_idx %d in %s()\n", p->mc_idx, __func__);
360 static void complete_mc_list_del(struct rcu_head *head)
362 struct mem_ctl_info *mci;
364 mci = container_of(head, struct mem_ctl_info, rcu);
365 INIT_LIST_HEAD(&mci->link);
366 complete(&mci->complete);
369 static void del_mc_from_global_list(struct mem_ctl_info *mci)
371 atomic_dec(&edac_handlers);
372 list_del_rcu(&mci->link);
373 init_completion(&mci->complete);
374 call_rcu(&mci->rcu, complete_mc_list_del);
375 wait_for_completion(&mci->complete);
379 * edac_mc_find: Search for a mem_ctl_info structure whose index is 'idx'.
381 * If found, return a pointer to the structure.
384 * Caller must hold mem_ctls_mutex.
386 struct mem_ctl_info *edac_mc_find(int idx)
388 struct list_head *item;
389 struct mem_ctl_info *mci;
391 list_for_each(item, &mc_devices) {
392 mci = list_entry(item, struct mem_ctl_info, link);
394 if (mci->mc_idx >= idx) {
395 if (mci->mc_idx == idx)
405 EXPORT_SYMBOL(edac_mc_find);
408 * edac_mc_add_mc: Insert the 'mci' structure into the mci global list and
409 * create sysfs entries associated with mci structure
410 * @mci: pointer to the mci structure to be added to the list
411 * @mc_idx: A unique numeric identifier to be assigned to the 'mci' structure.
418 /* FIXME - should a warning be printed if no error detection? correction? */
419 int edac_mc_add_mc(struct mem_ctl_info *mci, int mc_idx)
421 debugf0("%s()\n", __func__);
422 mci->mc_idx = mc_idx;
423 #ifdef CONFIG_EDAC_DEBUG
424 if (edac_debug_level >= 3)
425 edac_mc_dump_mci(mci);
427 if (edac_debug_level >= 4) {
430 for (i = 0; i < mci->nr_csrows; i++) {
433 edac_mc_dump_csrow(&mci->csrows[i]);
434 for (j = 0; j < mci->csrows[i].nr_channels; j++)
435 edac_mc_dump_channel(&mci->csrows[i].
440 mutex_lock(&mem_ctls_mutex);
442 if (add_mc_to_global_list(mci))
445 /* set load time so that error rate can be tracked */
446 mci->start_time = jiffies;
448 if (edac_create_sysfs_mci_device(mci)) {
449 edac_mc_printk(mci, KERN_WARNING,
450 "failed to create sysfs device\n");
454 /* If there IS a check routine, then we are running POLLED */
455 if (mci->edac_check != NULL) {
456 /* This instance is NOW RUNNING */
457 mci->op_state = OP_RUNNING_POLL;
459 edac_mc_workq_setup(mci, edac_mc_get_poll_msec());
461 mci->op_state = OP_RUNNING_INTERRUPT;
464 /* Report action taken */
465 edac_mc_printk(mci, KERN_INFO, "Giving out device to %s %s: DEV %s\n",
466 mci->mod_name, mci->ctl_name, dev_name(mci));
468 mutex_unlock(&mem_ctls_mutex);
472 del_mc_from_global_list(mci);
475 mutex_unlock(&mem_ctls_mutex);
479 EXPORT_SYMBOL_GPL(edac_mc_add_mc);
482 * edac_mc_del_mc: Remove sysfs entries for specified mci structure and
483 * remove mci structure from global list
484 * @pdev: Pointer to 'struct device' representing mci structure to remove.
486 * Return pointer to removed mci structure, or NULL if device not found.
488 struct mem_ctl_info *edac_mc_del_mc(struct device *dev)
490 struct mem_ctl_info *mci;
492 debugf0("MC: %s()\n", __func__);
493 mutex_lock(&mem_ctls_mutex);
495 if ((mci = find_mci_by_dev(dev)) == NULL) {
496 mutex_unlock(&mem_ctls_mutex);
500 /* marking MCI offline */
501 mci->op_state = OP_OFFLINE;
503 /* flush workq processes */
504 edac_mc_workq_teardown(mci);
506 edac_remove_sysfs_mci_device(mci);
507 del_mc_from_global_list(mci);
508 mutex_unlock(&mem_ctls_mutex);
509 edac_printk(KERN_INFO, EDAC_MC,
510 "Removed device %d for %s %s: DEV %s\n", mci->mc_idx,
511 mci->mod_name, mci->ctl_name, dev_name(mci));
515 EXPORT_SYMBOL_GPL(edac_mc_del_mc);
517 static void edac_mc_scrub_block(unsigned long page, unsigned long offset,
522 unsigned long flags = 0;
524 debugf3("%s()\n", __func__);
526 /* ECC error page was not in our memory. Ignore it. */
527 if (!pfn_valid(page))
530 /* Find the actual page structure then map it and fix */
531 pg = pfn_to_page(page);
534 local_irq_save(flags);
536 virt_addr = kmap_atomic(pg, KM_BOUNCE_READ);
538 /* Perform architecture specific atomic scrub operation */
539 atomic_scrub(virt_addr + offset, size);
541 /* Unmap and complete */
542 kunmap_atomic(virt_addr, KM_BOUNCE_READ);
545 local_irq_restore(flags);
548 /* FIXME - should return -1 */
549 int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, unsigned long page)
551 struct csrow_info *csrows = mci->csrows;
554 debugf1("MC%d: %s(): 0x%lx\n", mci->mc_idx, __func__, page);
557 for (i = 0; i < mci->nr_csrows; i++) {
558 struct csrow_info *csrow = &csrows[i];
560 if (csrow->nr_pages == 0)
563 debugf3("MC%d: %s(): first(0x%lx) page(0x%lx) last(0x%lx) "
564 "mask(0x%lx)\n", mci->mc_idx, __func__,
565 csrow->first_page, page, csrow->last_page,
568 if ((page >= csrow->first_page) &&
569 (page <= csrow->last_page) &&
570 ((page & csrow->page_mask) ==
571 (csrow->first_page & csrow->page_mask))) {
578 edac_mc_printk(mci, KERN_ERR,
579 "could not look up page error address %lx\n",
580 (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,
591 unsigned long offset_in_page, unsigned long syndrome,
592 int row, int channel, const char *msg)
594 unsigned long remapped_page;
596 debugf3("MC%d: %s()\n", mci->mc_idx, __func__);
598 /* FIXME - maybe make panic on INTERNAL ERROR an option */
599 if (row >= mci->nr_csrows || row < 0) {
600 /* something is wrong */
601 edac_mc_printk(mci, KERN_ERR,
602 "INTERNAL ERROR: row out of range "
603 "(%d >= %d)\n", row, mci->nr_csrows);
604 edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
608 if (channel >= mci->csrows[row].nr_channels || channel < 0) {
609 /* something is wrong */
610 edac_mc_printk(mci, KERN_ERR,
611 "INTERNAL ERROR: channel out of range "
612 "(%d >= %d)\n", channel,
613 mci->csrows[row].nr_channels);
614 edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
618 if (edac_mc_get_log_ce())
619 /* FIXME - put in DIMM location */
620 edac_mc_printk(mci, KERN_WARNING,
621 "CE page 0x%lx, offset 0x%lx, grain %d, syndrome "
622 "0x%lx, row %d, channel %d, label \"%s\": %s\n",
623 page_frame_number, offset_in_page,
624 mci->csrows[row].grain, syndrome, row, channel,
625 mci->csrows[row].channels[channel].label, msg);
628 mci->csrows[row].ce_count++;
629 mci->csrows[row].channels[channel].ce_count++;
631 if (mci->scrub_mode & SCRUB_SW_SRC) {
633 * Some MC's can remap memory so that it is still available
634 * at a different address when PCI devices map into memory.
635 * MC's that can't do this lose the memory where PCI devices
636 * are mapped. This mapping is MC dependant and so we call
637 * back into the MC driver for it to map the MC page to
638 * a physical (CPU) page which can then be mapped to a virtual
639 * page - which can then be scrubbed.
641 remapped_page = mci->ctl_page_to_phys ?
642 mci->ctl_page_to_phys(mci, page_frame_number) :
645 edac_mc_scrub_block(remapped_page, offset_in_page,
646 mci->csrows[row].grain);
650 EXPORT_SYMBOL_GPL(edac_mc_handle_ce);
652 void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, const char *msg)
654 if (edac_mc_get_log_ce())
655 edac_mc_printk(mci, KERN_WARNING,
656 "CE - no information available: %s\n", msg);
658 mci->ce_noinfo_count++;
662 EXPORT_SYMBOL_GPL(edac_mc_handle_ce_no_info);
664 void edac_mc_handle_ue(struct mem_ctl_info *mci,
665 unsigned long page_frame_number,
666 unsigned long offset_in_page, int row, const char *msg)
668 int len = EDAC_MC_LABEL_LEN * 4;
669 char labels[len + 1];
674 debugf3("MC%d: %s()\n", mci->mc_idx, __func__);
676 /* FIXME - maybe make panic on INTERNAL ERROR an option */
677 if (row >= mci->nr_csrows || row < 0) {
678 /* something is wrong */
679 edac_mc_printk(mci, KERN_ERR,
680 "INTERNAL ERROR: row out of range "
681 "(%d >= %d)\n", row, mci->nr_csrows);
682 edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
686 chars = snprintf(pos, len + 1, "%s",
687 mci->csrows[row].channels[0].label);
691 for (chan = 1; (chan < mci->csrows[row].nr_channels) && (len > 0);
693 chars = snprintf(pos, len + 1, ":%s",
694 mci->csrows[row].channels[chan].label);
699 if (edac_mc_get_log_ue())
700 edac_mc_printk(mci, KERN_EMERG,
701 "UE page 0x%lx, offset 0x%lx, grain %d, row %d, "
702 "labels \"%s\": %s\n", page_frame_number,
703 offset_in_page, mci->csrows[row].grain, row,
706 if (edac_mc_get_panic_on_ue())
707 panic("EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, "
708 "row %d, labels \"%s\": %s\n", mci->mc_idx,
709 page_frame_number, offset_in_page,
710 mci->csrows[row].grain, row, labels, msg);
713 mci->csrows[row].ue_count++;
716 EXPORT_SYMBOL_GPL(edac_mc_handle_ue);
718 void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, const char *msg)
720 if (edac_mc_get_panic_on_ue())
721 panic("EDAC MC%d: Uncorrected Error", mci->mc_idx);
723 if (edac_mc_get_log_ue())
724 edac_mc_printk(mci, KERN_WARNING,
725 "UE - no information available: %s\n", msg);
726 mci->ue_noinfo_count++;
730 EXPORT_SYMBOL_GPL(edac_mc_handle_ue_no_info);
732 /*************************************************************
733 * On Fully Buffered DIMM modules, this help function is
734 * called to process UE events
736 void edac_mc_handle_fbd_ue(struct mem_ctl_info *mci,
738 unsigned int channela,
739 unsigned int channelb, char *msg)
741 int len = EDAC_MC_LABEL_LEN * 4;
742 char labels[len + 1];
746 if (csrow >= mci->nr_csrows) {
747 /* something is wrong */
748 edac_mc_printk(mci, KERN_ERR,
749 "INTERNAL ERROR: row out of range (%d >= %d)\n",
750 csrow, mci->nr_csrows);
751 edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
755 if (channela >= mci->csrows[csrow].nr_channels) {
756 /* something is wrong */
757 edac_mc_printk(mci, KERN_ERR,
758 "INTERNAL ERROR: channel-a out of range "
760 channela, mci->csrows[csrow].nr_channels);
761 edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
765 if (channelb >= mci->csrows[csrow].nr_channels) {
766 /* something is wrong */
767 edac_mc_printk(mci, KERN_ERR,
768 "INTERNAL ERROR: channel-b out of range "
770 channelb, mci->csrows[csrow].nr_channels);
771 edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
776 mci->csrows[csrow].ue_count++;
778 /* Generate the DIMM labels from the specified channels */
779 chars = snprintf(pos, len + 1, "%s",
780 mci->csrows[csrow].channels[channela].label);
783 chars = snprintf(pos, len + 1, "-%s",
784 mci->csrows[csrow].channels[channelb].label);
786 if (edac_mc_get_log_ue())
787 edac_mc_printk(mci, KERN_EMERG,
788 "UE row %d, channel-a= %d channel-b= %d "
789 "labels \"%s\": %s\n", csrow, channela, channelb,
792 if (edac_mc_get_panic_on_ue())
793 panic("UE row %d, channel-a= %d channel-b= %d "
794 "labels \"%s\": %s\n", csrow, channela,
795 channelb, labels, msg);
798 EXPORT_SYMBOL(edac_mc_handle_fbd_ue);
800 /*************************************************************
801 * On Fully Buffered DIMM modules, this help function is
802 * called to process CE events
804 void edac_mc_handle_fbd_ce(struct mem_ctl_info *mci,
805 unsigned int csrow, unsigned int channel, char *msg)
808 /* Ensure boundary values */
809 if (csrow >= mci->nr_csrows) {
810 /* something is wrong */
811 edac_mc_printk(mci, KERN_ERR,
812 "INTERNAL ERROR: row out of range (%d >= %d)\n",
813 csrow, mci->nr_csrows);
814 edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
817 if (channel >= mci->csrows[csrow].nr_channels) {
818 /* something is wrong */
819 edac_mc_printk(mci, KERN_ERR,
820 "INTERNAL ERROR: channel out of range (%d >= %d)\n",
821 channel, mci->csrows[csrow].nr_channels);
822 edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
826 if (edac_mc_get_log_ce())
827 /* FIXME - put in DIMM location */
828 edac_mc_printk(mci, KERN_WARNING,
829 "CE row %d, channel %d, label \"%s\": %s\n",
831 mci->csrows[csrow].channels[channel].label, msg);
834 mci->csrows[csrow].ce_count++;
835 mci->csrows[csrow].channels[channel].ce_count++;
838 EXPORT_SYMBOL(edac_mc_handle_fbd_ce);
841 * Iterate over all MC instances and check for ECC, et al, errors
843 void edac_check_mc_devices(void)
845 struct list_head *item;
846 struct mem_ctl_info *mci;
848 debugf3("%s()\n", __func__);
849 mutex_lock(&mem_ctls_mutex);
851 list_for_each(item, &mc_devices) {
852 mci = list_entry(item, struct mem_ctl_info, link);
854 if (mci->edac_check != NULL)
855 mci->edac_check(mci);
858 mutex_unlock(&mem_ctls_mutex);