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 LIST_HEAD(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 */
82 * keep those in sync with the enum mem_type
84 const char *edac_mem_types[] = {
86 "Reserved csrow type",
89 "Extended data out RAM",
90 "Burst Extended data out RAM",
91 "Single data rate SDRAM",
92 "Registered single data rate SDRAM",
93 "Double data rate SDRAM",
94 "Registered Double data rate SDRAM",
96 "Unbuffered DDR2 RAM",
97 "Fully buffered DDR2",
98 "Registered DDR2 RAM",
100 "Unbuffered DDR3 RAM",
101 "Registered DDR3 RAM",
103 EXPORT_SYMBOL_GPL(edac_mem_types);
105 /* 'ptr' points to a possibly unaligned item X such that sizeof(X) is 'size'.
106 * Adjust 'ptr' so that its alignment is at least as stringent as what the
107 * compiler would provide for X and return the aligned result.
109 * If 'size' is a constant, the compiler will optimize this whole function
110 * down to either a no-op or the addition of a constant to the value of 'ptr'.
112 void *edac_align_ptr(void *ptr, unsigned size)
116 /* Here we assume that the alignment of a "long long" is the most
117 * stringent alignment that the compiler will ever provide by default.
118 * As far as I know, this is a reasonable assumption.
120 if (size > sizeof(long))
121 align = sizeof(long long);
122 else if (size > sizeof(int))
123 align = sizeof(long);
124 else if (size > sizeof(short))
126 else if (size > sizeof(char))
127 align = sizeof(short);
136 return (void *)(((unsigned long)ptr) + align - r);
140 * edac_mc_alloc: Allocate a struct mem_ctl_info structure
141 * @size_pvt: size of private storage needed
142 * @nr_csrows: Number of CWROWS needed for this MC
143 * @nr_chans: Number of channels for the MC
145 * Everything is kmalloc'ed as one big chunk - more efficient.
146 * Only can be used if all structures have the same lifetime - otherwise
147 * you have to allocate and initialize your own structures.
149 * Use edac_mc_free() to free mc structures allocated by this function.
152 * NULL allocation failed
153 * struct mem_ctl_info pointer
155 struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows,
156 unsigned nr_chans, int edac_index)
158 struct mem_ctl_info *mci;
159 struct csrow_info *csi, *csrow;
160 struct channel_info *chi, *chp, *chan;
166 /* Figure out the offsets of the various items from the start of an mc
167 * structure. We want the alignment of each item to be at least as
168 * stringent as what the compiler would provide if we could simply
169 * hardcode everything into a single struct.
171 mci = (struct mem_ctl_info *)0;
172 csi = edac_align_ptr(&mci[1], sizeof(*csi));
173 chi = edac_align_ptr(&csi[nr_csrows], sizeof(*chi));
174 pvt = edac_align_ptr(&chi[nr_chans * nr_csrows], sz_pvt);
175 size = ((unsigned long)pvt) + sz_pvt;
177 mci = kzalloc(size, GFP_KERNEL);
181 /* Adjust pointers so they point within the memory we just allocated
182 * rather than an imaginary chunk of memory located at address 0.
184 csi = (struct csrow_info *)(((char *)mci) + ((unsigned long)csi));
185 chi = (struct channel_info *)(((char *)mci) + ((unsigned long)chi));
186 pvt = sz_pvt ? (((char *)mci) + ((unsigned long)pvt)) : NULL;
188 /* setup index and various internal pointers */
189 mci->mc_idx = edac_index;
192 mci->nr_csrows = nr_csrows;
194 for (row = 0; row < nr_csrows; row++) {
196 csrow->csrow_idx = row;
198 csrow->nr_channels = nr_chans;
199 chp = &chi[row * nr_chans];
200 csrow->channels = chp;
202 for (chn = 0; chn < nr_chans; chn++) {
204 chan->chan_idx = chn;
209 mci->op_state = OP_ALLOC;
210 INIT_LIST_HEAD(&mci->grp_kobj_list);
213 * Initialize the 'root' kobj for the edac_mc controller
215 err = edac_mc_register_sysfs_main_kobj(mci);
221 /* at this point, the root kobj is valid, and in order to
222 * 'free' the object, then the function:
223 * edac_mc_unregister_sysfs_main_kobj() must be called
224 * which will perform kobj unregistration and the actual free
225 * will occur during the kobject callback operation
229 EXPORT_SYMBOL_GPL(edac_mc_alloc);
233 * 'Free' a previously allocated 'mci' structure
234 * @mci: pointer to a struct mem_ctl_info structure
236 void edac_mc_free(struct mem_ctl_info *mci)
238 debugf1("%s()\n", __func__);
240 edac_mc_unregister_sysfs_main_kobj(mci);
242 /* free the mci instance memory here */
245 EXPORT_SYMBOL_GPL(edac_mc_free);
251 * scan list of controllers looking for the one that manages
253 * @dev: pointer to a struct device related with the MCI
255 struct mem_ctl_info *find_mci_by_dev(struct device *dev)
257 struct mem_ctl_info *mci;
258 struct list_head *item;
260 debugf3("%s()\n", __func__);
262 list_for_each(item, &mc_devices) {
263 mci = list_entry(item, struct mem_ctl_info, link);
271 EXPORT_SYMBOL_GPL(find_mci_by_dev);
274 * handler for EDAC to check if NMI type handler has asserted interrupt
276 static int edac_mc_assert_error_check_and_clear(void)
280 if (edac_op_state == EDAC_OPSTATE_POLL)
283 old_state = edac_err_assert;
290 * edac_mc_workq_function
291 * performs the operation scheduled by a workq request
293 static void edac_mc_workq_function(struct work_struct *work_req)
295 struct delayed_work *d_work = to_delayed_work(work_req);
296 struct mem_ctl_info *mci = to_edac_mem_ctl_work(d_work);
298 mutex_lock(&mem_ctls_mutex);
300 /* if this control struct has movd to offline state, we are done */
301 if (mci->op_state == OP_OFFLINE) {
302 mutex_unlock(&mem_ctls_mutex);
306 /* Only poll controllers that are running polled and have a check */
307 if (edac_mc_assert_error_check_and_clear() && (mci->edac_check != NULL))
308 mci->edac_check(mci);
310 mutex_unlock(&mem_ctls_mutex);
313 queue_delayed_work(edac_workqueue, &mci->work,
314 msecs_to_jiffies(edac_mc_get_poll_msec()));
318 * edac_mc_workq_setup
319 * initialize a workq item for this mci
320 * passing in the new delay period in msec
324 * called with the mem_ctls_mutex held
326 static void edac_mc_workq_setup(struct mem_ctl_info *mci, unsigned msec,
329 debugf0("%s()\n", __func__);
331 /* if this instance is not in the POLL state, then simply return */
332 if (mci->op_state != OP_RUNNING_POLL)
336 INIT_DELAYED_WORK(&mci->work, edac_mc_workq_function);
338 queue_delayed_work(edac_workqueue, &mci->work, msecs_to_jiffies(msec));
342 * edac_mc_workq_teardown
343 * stop the workq processing on this mci
347 * called WITHOUT lock held
349 static void edac_mc_workq_teardown(struct mem_ctl_info *mci)
353 if (mci->op_state != OP_RUNNING_POLL)
356 status = cancel_delayed_work(&mci->work);
358 debugf0("%s() not canceled, flush the queue\n",
361 /* workq instance might be running, wait for it */
362 flush_workqueue(edac_workqueue);
367 * edac_mc_reset_delay_period(unsigned long value)
369 * user space has updated our poll period value, need to
370 * reset our workq delays
372 void edac_mc_reset_delay_period(int value)
374 struct mem_ctl_info *mci;
375 struct list_head *item;
377 mutex_lock(&mem_ctls_mutex);
379 /* scan the list and turn off all workq timers, doing so under lock
381 list_for_each(item, &mc_devices) {
382 mci = list_entry(item, struct mem_ctl_info, link);
384 if (mci->op_state == OP_RUNNING_POLL)
385 cancel_delayed_work(&mci->work);
388 mutex_unlock(&mem_ctls_mutex);
391 /* re-walk the list, and reset the poll delay */
392 mutex_lock(&mem_ctls_mutex);
394 list_for_each(item, &mc_devices) {
395 mci = list_entry(item, struct mem_ctl_info, link);
397 edac_mc_workq_setup(mci, value, false);
400 mutex_unlock(&mem_ctls_mutex);
405 /* Return 0 on success, 1 on failure.
406 * Before calling this function, caller must
407 * assign a unique value to mci->mc_idx.
411 * called with the mem_ctls_mutex lock held
413 static int add_mc_to_global_list(struct mem_ctl_info *mci)
415 struct list_head *item, *insert_before;
416 struct mem_ctl_info *p;
418 insert_before = &mc_devices;
420 p = find_mci_by_dev(mci->dev);
421 if (unlikely(p != NULL))
424 list_for_each(item, &mc_devices) {
425 p = list_entry(item, struct mem_ctl_info, link);
427 if (p->mc_idx >= mci->mc_idx) {
428 if (unlikely(p->mc_idx == mci->mc_idx))
431 insert_before = item;
436 list_add_tail_rcu(&mci->link, insert_before);
437 atomic_inc(&edac_handlers);
441 edac_printk(KERN_WARNING, EDAC_MC,
442 "%s (%s) %s %s already assigned %d\n", dev_name(p->dev),
443 edac_dev_name(mci), p->mod_name, p->ctl_name, p->mc_idx);
447 edac_printk(KERN_WARNING, EDAC_MC,
448 "bug in low-level driver: attempt to assign\n"
449 " duplicate mc_idx %d in %s()\n", p->mc_idx, __func__);
453 static void del_mc_from_global_list(struct mem_ctl_info *mci)
455 atomic_dec(&edac_handlers);
456 list_del_rcu(&mci->link);
458 /* these are for safe removal of devices from global list while
459 * NMI handlers may be traversing list
462 INIT_LIST_HEAD(&mci->link);
466 * edac_mc_find: Search for a mem_ctl_info structure whose index is 'idx'.
468 * If found, return a pointer to the structure.
471 * Caller must hold mem_ctls_mutex.
473 struct mem_ctl_info *edac_mc_find(int idx)
475 struct list_head *item;
476 struct mem_ctl_info *mci;
478 list_for_each(item, &mc_devices) {
479 mci = list_entry(item, struct mem_ctl_info, link);
481 if (mci->mc_idx >= idx) {
482 if (mci->mc_idx == idx)
491 EXPORT_SYMBOL(edac_mc_find);
494 * edac_mc_add_mc: Insert the 'mci' structure into the mci global list and
495 * create sysfs entries associated with mci structure
496 * @mci: pointer to the mci structure to be added to the list
497 * @mc_idx: A unique numeric identifier to be assigned to the 'mci' structure.
504 /* FIXME - should a warning be printed if no error detection? correction? */
505 int edac_mc_add_mc(struct mem_ctl_info *mci)
507 debugf0("%s()\n", __func__);
509 #ifdef CONFIG_EDAC_DEBUG
510 if (edac_debug_level >= 3)
511 edac_mc_dump_mci(mci);
513 if (edac_debug_level >= 4) {
516 for (i = 0; i < mci->nr_csrows; i++) {
519 edac_mc_dump_csrow(&mci->csrows[i]);
520 for (j = 0; j < mci->csrows[i].nr_channels; j++)
521 edac_mc_dump_channel(&mci->csrows[i].
526 mutex_lock(&mem_ctls_mutex);
528 if (add_mc_to_global_list(mci))
531 /* set load time so that error rate can be tracked */
532 mci->start_time = jiffies;
534 if (edac_create_sysfs_mci_device(mci)) {
535 edac_mc_printk(mci, KERN_WARNING,
536 "failed to create sysfs device\n");
540 /* If there IS a check routine, then we are running POLLED */
541 if (mci->edac_check != NULL) {
542 /* This instance is NOW RUNNING */
543 mci->op_state = OP_RUNNING_POLL;
545 edac_mc_workq_setup(mci, edac_mc_get_poll_msec(), true);
547 mci->op_state = OP_RUNNING_INTERRUPT;
550 /* Report action taken */
551 edac_mc_printk(mci, KERN_INFO, "Giving out device to '%s' '%s':"
552 " DEV %s\n", mci->mod_name, mci->ctl_name, edac_dev_name(mci));
554 mutex_unlock(&mem_ctls_mutex);
558 del_mc_from_global_list(mci);
561 mutex_unlock(&mem_ctls_mutex);
564 EXPORT_SYMBOL_GPL(edac_mc_add_mc);
567 * edac_mc_del_mc: Remove sysfs entries for specified mci structure and
568 * remove mci structure from global list
569 * @pdev: Pointer to 'struct device' representing mci structure to remove.
571 * Return pointer to removed mci structure, or NULL if device not found.
573 struct mem_ctl_info *edac_mc_del_mc(struct device *dev)
575 struct mem_ctl_info *mci;
577 debugf0("%s()\n", __func__);
579 mutex_lock(&mem_ctls_mutex);
581 /* find the requested mci struct in the global list */
582 mci = find_mci_by_dev(dev);
584 mutex_unlock(&mem_ctls_mutex);
588 del_mc_from_global_list(mci);
589 mutex_unlock(&mem_ctls_mutex);
591 /* flush workq processes */
592 edac_mc_workq_teardown(mci);
594 /* marking MCI offline */
595 mci->op_state = OP_OFFLINE;
597 /* remove from sysfs */
598 edac_remove_sysfs_mci_device(mci);
600 edac_printk(KERN_INFO, EDAC_MC,
601 "Removed device %d for %s %s: DEV %s\n", mci->mc_idx,
602 mci->mod_name, mci->ctl_name, edac_dev_name(mci));
606 EXPORT_SYMBOL_GPL(edac_mc_del_mc);
608 static void edac_mc_scrub_block(unsigned long page, unsigned long offset,
613 unsigned long flags = 0;
615 debugf3("%s()\n", __func__);
617 /* ECC error page was not in our memory. Ignore it. */
618 if (!pfn_valid(page))
621 /* Find the actual page structure then map it and fix */
622 pg = pfn_to_page(page);
625 local_irq_save(flags);
627 virt_addr = kmap_atomic(pg, KM_BOUNCE_READ);
629 /* Perform architecture specific atomic scrub operation */
630 atomic_scrub(virt_addr + offset, size);
632 /* Unmap and complete */
633 kunmap_atomic(virt_addr, KM_BOUNCE_READ);
636 local_irq_restore(flags);
639 /* FIXME - should return -1 */
640 int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, unsigned long page)
642 struct csrow_info *csrows = mci->csrows;
645 debugf1("MC%d: %s(): 0x%lx\n", mci->mc_idx, __func__, page);
648 for (i = 0; i < mci->nr_csrows; i++) {
649 struct csrow_info *csrow = &csrows[i];
651 if (csrow->nr_pages == 0)
654 debugf3("MC%d: %s(): first(0x%lx) page(0x%lx) last(0x%lx) "
655 "mask(0x%lx)\n", mci->mc_idx, __func__,
656 csrow->first_page, page, csrow->last_page,
659 if ((page >= csrow->first_page) &&
660 (page <= csrow->last_page) &&
661 ((page & csrow->page_mask) ==
662 (csrow->first_page & csrow->page_mask))) {
669 edac_mc_printk(mci, KERN_ERR,
670 "could not look up page error address %lx\n",
671 (unsigned long)page);
675 EXPORT_SYMBOL_GPL(edac_mc_find_csrow_by_page);
677 /* FIXME - setable log (warning/emerg) levels */
678 /* FIXME - integrate with evlog: http://evlog.sourceforge.net/ */
679 void edac_mc_handle_ce(struct mem_ctl_info *mci,
680 unsigned long page_frame_number,
681 unsigned long offset_in_page, unsigned long syndrome,
682 int row, int channel, const char *msg)
684 unsigned long remapped_page;
686 debugf3("MC%d: %s()\n", mci->mc_idx, __func__);
688 /* FIXME - maybe make panic on INTERNAL ERROR an option */
689 if (row >= mci->nr_csrows || row < 0) {
690 /* something is wrong */
691 edac_mc_printk(mci, KERN_ERR,
692 "INTERNAL ERROR: row out of range "
693 "(%d >= %d)\n", row, mci->nr_csrows);
694 edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
698 if (channel >= mci->csrows[row].nr_channels || channel < 0) {
699 /* something is wrong */
700 edac_mc_printk(mci, KERN_ERR,
701 "INTERNAL ERROR: channel out of range "
702 "(%d >= %d)\n", channel,
703 mci->csrows[row].nr_channels);
704 edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
708 if (edac_mc_get_log_ce())
709 /* FIXME - put in DIMM location */
710 edac_mc_printk(mci, KERN_WARNING,
711 "CE page 0x%lx, offset 0x%lx, grain %d, syndrome "
712 "0x%lx, row %d, channel %d, label \"%s\": %s\n",
713 page_frame_number, offset_in_page,
714 mci->csrows[row].grain, syndrome, row, channel,
715 mci->csrows[row].channels[channel].label, msg);
718 mci->csrows[row].ce_count++;
719 mci->csrows[row].channels[channel].ce_count++;
721 if (mci->scrub_mode & SCRUB_SW_SRC) {
723 * Some MC's can remap memory so that it is still available
724 * at a different address when PCI devices map into memory.
725 * MC's that can't do this lose the memory where PCI devices
726 * are mapped. This mapping is MC dependent and so we call
727 * back into the MC driver for it to map the MC page to
728 * a physical (CPU) page which can then be mapped to a virtual
729 * page - which can then be scrubbed.
731 remapped_page = mci->ctl_page_to_phys ?
732 mci->ctl_page_to_phys(mci, page_frame_number) :
735 edac_mc_scrub_block(remapped_page, offset_in_page,
736 mci->csrows[row].grain);
739 EXPORT_SYMBOL_GPL(edac_mc_handle_ce);
741 void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, const char *msg)
743 if (edac_mc_get_log_ce())
744 edac_mc_printk(mci, KERN_WARNING,
745 "CE - no information available: %s\n", msg);
747 mci->ce_noinfo_count++;
750 EXPORT_SYMBOL_GPL(edac_mc_handle_ce_no_info);
752 void edac_mc_handle_ue(struct mem_ctl_info *mci,
753 unsigned long page_frame_number,
754 unsigned long offset_in_page, int row, const char *msg)
756 int len = EDAC_MC_LABEL_LEN * 4;
757 char labels[len + 1];
762 debugf3("MC%d: %s()\n", mci->mc_idx, __func__);
764 /* FIXME - maybe make panic on INTERNAL ERROR an option */
765 if (row >= mci->nr_csrows || row < 0) {
766 /* something is wrong */
767 edac_mc_printk(mci, KERN_ERR,
768 "INTERNAL ERROR: row out of range "
769 "(%d >= %d)\n", row, mci->nr_csrows);
770 edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
774 chars = snprintf(pos, len + 1, "%s",
775 mci->csrows[row].channels[0].label);
779 for (chan = 1; (chan < mci->csrows[row].nr_channels) && (len > 0);
781 chars = snprintf(pos, len + 1, ":%s",
782 mci->csrows[row].channels[chan].label);
787 if (edac_mc_get_log_ue())
788 edac_mc_printk(mci, KERN_EMERG,
789 "UE page 0x%lx, offset 0x%lx, grain %d, row %d, "
790 "labels \"%s\": %s\n", page_frame_number,
791 offset_in_page, mci->csrows[row].grain, row,
794 if (edac_mc_get_panic_on_ue())
795 panic("EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, "
796 "row %d, labels \"%s\": %s\n", mci->mc_idx,
797 page_frame_number, offset_in_page,
798 mci->csrows[row].grain, row, labels, msg);
801 mci->csrows[row].ue_count++;
803 EXPORT_SYMBOL_GPL(edac_mc_handle_ue);
805 void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, const char *msg)
807 if (edac_mc_get_panic_on_ue())
808 panic("EDAC MC%d: Uncorrected Error", mci->mc_idx);
810 if (edac_mc_get_log_ue())
811 edac_mc_printk(mci, KERN_WARNING,
812 "UE - no information available: %s\n", msg);
813 mci->ue_noinfo_count++;
816 EXPORT_SYMBOL_GPL(edac_mc_handle_ue_no_info);
818 /*************************************************************
819 * On Fully Buffered DIMM modules, this help function is
820 * called to process UE events
822 void edac_mc_handle_fbd_ue(struct mem_ctl_info *mci,
824 unsigned int channela,
825 unsigned int channelb, char *msg)
827 int len = EDAC_MC_LABEL_LEN * 4;
828 char labels[len + 1];
832 if (csrow >= mci->nr_csrows) {
833 /* something is wrong */
834 edac_mc_printk(mci, KERN_ERR,
835 "INTERNAL ERROR: row out of range (%d >= %d)\n",
836 csrow, mci->nr_csrows);
837 edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
841 if (channela >= mci->csrows[csrow].nr_channels) {
842 /* something is wrong */
843 edac_mc_printk(mci, KERN_ERR,
844 "INTERNAL ERROR: channel-a out of range "
846 channela, mci->csrows[csrow].nr_channels);
847 edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
851 if (channelb >= mci->csrows[csrow].nr_channels) {
852 /* something is wrong */
853 edac_mc_printk(mci, KERN_ERR,
854 "INTERNAL ERROR: channel-b out of range "
856 channelb, mci->csrows[csrow].nr_channels);
857 edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
862 mci->csrows[csrow].ue_count++;
864 /* Generate the DIMM labels from the specified channels */
865 chars = snprintf(pos, len + 1, "%s",
866 mci->csrows[csrow].channels[channela].label);
869 chars = snprintf(pos, len + 1, "-%s",
870 mci->csrows[csrow].channels[channelb].label);
872 if (edac_mc_get_log_ue())
873 edac_mc_printk(mci, KERN_EMERG,
874 "UE row %d, channel-a= %d channel-b= %d "
875 "labels \"%s\": %s\n", csrow, channela, channelb,
878 if (edac_mc_get_panic_on_ue())
879 panic("UE row %d, channel-a= %d channel-b= %d "
880 "labels \"%s\": %s\n", csrow, channela,
881 channelb, labels, msg);
883 EXPORT_SYMBOL(edac_mc_handle_fbd_ue);
885 /*************************************************************
886 * On Fully Buffered DIMM modules, this help function is
887 * called to process CE events
889 void edac_mc_handle_fbd_ce(struct mem_ctl_info *mci,
890 unsigned int csrow, unsigned int channel, char *msg)
893 /* Ensure boundary values */
894 if (csrow >= mci->nr_csrows) {
895 /* something is wrong */
896 edac_mc_printk(mci, KERN_ERR,
897 "INTERNAL ERROR: row out of range (%d >= %d)\n",
898 csrow, mci->nr_csrows);
899 edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
902 if (channel >= mci->csrows[csrow].nr_channels) {
903 /* something is wrong */
904 edac_mc_printk(mci, KERN_ERR,
905 "INTERNAL ERROR: channel out of range (%d >= %d)\n",
906 channel, mci->csrows[csrow].nr_channels);
907 edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
911 if (edac_mc_get_log_ce())
912 /* FIXME - put in DIMM location */
913 edac_mc_printk(mci, KERN_WARNING,
914 "CE row %d, channel %d, label \"%s\": %s\n",
916 mci->csrows[csrow].channels[channel].label, msg);
919 mci->csrows[csrow].ce_count++;
920 mci->csrows[csrow].channels[channel].ce_count++;
922 EXPORT_SYMBOL(edac_mc_handle_fbd_ce);