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);
80 * keep those in sync with the enum mem_type
82 const char *edac_mem_types[] = {
84 "Reserved csrow type",
87 "Extended data out RAM",
88 "Burst Extended data out RAM",
89 "Single data rate SDRAM",
90 "Registered single data rate SDRAM",
91 "Double data rate SDRAM",
92 "Registered Double data rate SDRAM",
94 "Unbuffered DDR2 RAM",
95 "Fully buffered DDR2",
96 "Registered DDR2 RAM",
98 "Unbuffered DDR3 RAM",
99 "Registered DDR3 RAM",
101 EXPORT_SYMBOL_GPL(edac_mem_types);
103 #endif /* CONFIG_EDAC_DEBUG */
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;
212 * Initialize the 'root' kobj for the edac_mc controller
214 err = edac_mc_register_sysfs_main_kobj(mci);
220 /* at this point, the root kobj is valid, and in order to
221 * 'free' the object, then the function:
222 * edac_mc_unregister_sysfs_main_kobj() must be called
223 * which will perform kobj unregistration and the actual free
224 * will occur during the kobject callback operation
228 EXPORT_SYMBOL_GPL(edac_mc_alloc);
232 * 'Free' a previously allocated 'mci' structure
233 * @mci: pointer to a struct mem_ctl_info structure
235 void edac_mc_free(struct mem_ctl_info *mci)
237 edac_mc_unregister_sysfs_main_kobj(mci);
239 EXPORT_SYMBOL_GPL(edac_mc_free);
245 * scan list of controllers looking for the one that manages
248 static struct mem_ctl_info *find_mci_by_dev(struct device *dev)
250 struct mem_ctl_info *mci;
251 struct list_head *item;
253 debugf3("%s()\n", __func__);
255 list_for_each(item, &mc_devices) {
256 mci = list_entry(item, struct mem_ctl_info, link);
266 * handler for EDAC to check if NMI type handler has asserted interrupt
268 static int edac_mc_assert_error_check_and_clear(void)
272 if (edac_op_state == EDAC_OPSTATE_POLL)
275 old_state = edac_err_assert;
282 * edac_mc_workq_function
283 * performs the operation scheduled by a workq request
285 static void edac_mc_workq_function(struct work_struct *work_req)
287 struct delayed_work *d_work = to_delayed_work(work_req);
288 struct mem_ctl_info *mci = to_edac_mem_ctl_work(d_work);
290 mutex_lock(&mem_ctls_mutex);
292 /* if this control struct has movd to offline state, we are done */
293 if (mci->op_state == OP_OFFLINE) {
294 mutex_unlock(&mem_ctls_mutex);
298 /* Only poll controllers that are running polled and have a check */
299 if (edac_mc_assert_error_check_and_clear() && (mci->edac_check != NULL))
300 mci->edac_check(mci);
302 mutex_unlock(&mem_ctls_mutex);
305 queue_delayed_work(edac_workqueue, &mci->work,
306 msecs_to_jiffies(edac_mc_get_poll_msec()));
310 * edac_mc_workq_setup
311 * initialize a workq item for this mci
312 * passing in the new delay period in msec
316 * called with the mem_ctls_mutex held
318 static void edac_mc_workq_setup(struct mem_ctl_info *mci, unsigned msec)
320 debugf0("%s()\n", __func__);
322 /* if this instance is not in the POLL state, then simply return */
323 if (mci->op_state != OP_RUNNING_POLL)
326 INIT_DELAYED_WORK(&mci->work, edac_mc_workq_function);
327 queue_delayed_work(edac_workqueue, &mci->work, msecs_to_jiffies(msec));
331 * edac_mc_workq_teardown
332 * stop the workq processing on this mci
336 * called WITHOUT lock held
338 static void edac_mc_workq_teardown(struct mem_ctl_info *mci)
342 if (mci->op_state != OP_RUNNING_POLL)
345 status = cancel_delayed_work(&mci->work);
347 debugf0("%s() not canceled, flush the queue\n",
350 /* workq instance might be running, wait for it */
351 flush_workqueue(edac_workqueue);
356 * edac_mc_reset_delay_period(unsigned long value)
358 * user space has updated our poll period value, need to
359 * reset our workq delays
361 void edac_mc_reset_delay_period(int value)
363 struct mem_ctl_info *mci;
364 struct list_head *item;
366 mutex_lock(&mem_ctls_mutex);
368 /* scan the list and turn off all workq timers, doing so under lock
370 list_for_each(item, &mc_devices) {
371 mci = list_entry(item, struct mem_ctl_info, link);
373 if (mci->op_state == OP_RUNNING_POLL)
374 cancel_delayed_work(&mci->work);
377 mutex_unlock(&mem_ctls_mutex);
380 /* re-walk the list, and reset the poll delay */
381 mutex_lock(&mem_ctls_mutex);
383 list_for_each(item, &mc_devices) {
384 mci = list_entry(item, struct mem_ctl_info, link);
386 edac_mc_workq_setup(mci, (unsigned long) value);
389 mutex_unlock(&mem_ctls_mutex);
394 /* Return 0 on success, 1 on failure.
395 * Before calling this function, caller must
396 * assign a unique value to mci->mc_idx.
400 * called with the mem_ctls_mutex lock held
402 static int add_mc_to_global_list(struct mem_ctl_info *mci)
404 struct list_head *item, *insert_before;
405 struct mem_ctl_info *p;
407 insert_before = &mc_devices;
409 p = find_mci_by_dev(mci->dev);
410 if (unlikely(p != NULL))
413 list_for_each(item, &mc_devices) {
414 p = list_entry(item, struct mem_ctl_info, link);
416 if (p->mc_idx >= mci->mc_idx) {
417 if (unlikely(p->mc_idx == mci->mc_idx))
420 insert_before = item;
425 list_add_tail_rcu(&mci->link, insert_before);
426 atomic_inc(&edac_handlers);
430 edac_printk(KERN_WARNING, EDAC_MC,
431 "%s (%s) %s %s already assigned %d\n", dev_name(p->dev),
432 edac_dev_name(mci), p->mod_name, p->ctl_name, p->mc_idx);
436 edac_printk(KERN_WARNING, EDAC_MC,
437 "bug in low-level driver: attempt to assign\n"
438 " duplicate mc_idx %d in %s()\n", p->mc_idx, __func__);
442 static void complete_mc_list_del(struct rcu_head *head)
444 struct mem_ctl_info *mci;
446 mci = container_of(head, struct mem_ctl_info, rcu);
447 INIT_LIST_HEAD(&mci->link);
450 static void del_mc_from_global_list(struct mem_ctl_info *mci)
452 atomic_dec(&edac_handlers);
453 list_del_rcu(&mci->link);
454 call_rcu(&mci->rcu, complete_mc_list_del);
459 * edac_mc_find: Search for a mem_ctl_info structure whose index is 'idx'.
461 * If found, return a pointer to the structure.
464 * Caller must hold mem_ctls_mutex.
466 struct mem_ctl_info *edac_mc_find(int idx)
468 struct list_head *item;
469 struct mem_ctl_info *mci;
471 list_for_each(item, &mc_devices) {
472 mci = list_entry(item, struct mem_ctl_info, link);
474 if (mci->mc_idx >= idx) {
475 if (mci->mc_idx == idx)
484 EXPORT_SYMBOL(edac_mc_find);
487 * edac_mc_add_mc: Insert the 'mci' structure into the mci global list and
488 * create sysfs entries associated with mci structure
489 * @mci: pointer to the mci structure to be added to the list
490 * @mc_idx: A unique numeric identifier to be assigned to the 'mci' structure.
497 /* FIXME - should a warning be printed if no error detection? correction? */
498 int edac_mc_add_mc(struct mem_ctl_info *mci)
500 debugf0("%s()\n", __func__);
502 #ifdef CONFIG_EDAC_DEBUG
503 if (edac_debug_level >= 3)
504 edac_mc_dump_mci(mci);
506 if (edac_debug_level >= 4) {
509 for (i = 0; i < mci->nr_csrows; i++) {
512 edac_mc_dump_csrow(&mci->csrows[i]);
513 for (j = 0; j < mci->csrows[i].nr_channels; j++)
514 edac_mc_dump_channel(&mci->csrows[i].
519 mutex_lock(&mem_ctls_mutex);
521 if (add_mc_to_global_list(mci))
524 /* set load time so that error rate can be tracked */
525 mci->start_time = jiffies;
527 if (edac_create_sysfs_mci_device(mci)) {
528 edac_mc_printk(mci, KERN_WARNING,
529 "failed to create sysfs device\n");
533 /* If there IS a check routine, then we are running POLLED */
534 if (mci->edac_check != NULL) {
535 /* This instance is NOW RUNNING */
536 mci->op_state = OP_RUNNING_POLL;
538 edac_mc_workq_setup(mci, edac_mc_get_poll_msec());
540 mci->op_state = OP_RUNNING_INTERRUPT;
543 /* Report action taken */
544 edac_mc_printk(mci, KERN_INFO, "Giving out device to '%s' '%s':"
545 " DEV %s\n", mci->mod_name, mci->ctl_name, edac_dev_name(mci));
547 mutex_unlock(&mem_ctls_mutex);
551 del_mc_from_global_list(mci);
554 mutex_unlock(&mem_ctls_mutex);
557 EXPORT_SYMBOL_GPL(edac_mc_add_mc);
560 * edac_mc_del_mc: Remove sysfs entries for specified mci structure and
561 * remove mci structure from global list
562 * @pdev: Pointer to 'struct device' representing mci structure to remove.
564 * Return pointer to removed mci structure, or NULL if device not found.
566 struct mem_ctl_info *edac_mc_del_mc(struct device *dev)
568 struct mem_ctl_info *mci;
570 debugf0("%s()\n", __func__);
572 mutex_lock(&mem_ctls_mutex);
574 /* find the requested mci struct in the global list */
575 mci = find_mci_by_dev(dev);
577 mutex_unlock(&mem_ctls_mutex);
581 del_mc_from_global_list(mci);
582 mutex_unlock(&mem_ctls_mutex);
584 /* flush workq processes */
585 edac_mc_workq_teardown(mci);
587 /* marking MCI offline */
588 mci->op_state = OP_OFFLINE;
590 /* remove from sysfs */
591 edac_remove_sysfs_mci_device(mci);
593 edac_printk(KERN_INFO, EDAC_MC,
594 "Removed device %d for %s %s: DEV %s\n", mci->mc_idx,
595 mci->mod_name, mci->ctl_name, edac_dev_name(mci));
599 EXPORT_SYMBOL_GPL(edac_mc_del_mc);
601 static void edac_mc_scrub_block(unsigned long page, unsigned long offset,
606 unsigned long flags = 0;
608 debugf3("%s()\n", __func__);
610 /* ECC error page was not in our memory. Ignore it. */
611 if (!pfn_valid(page))
614 /* Find the actual page structure then map it and fix */
615 pg = pfn_to_page(page);
618 local_irq_save(flags);
620 virt_addr = kmap_atomic(pg, KM_BOUNCE_READ);
622 /* Perform architecture specific atomic scrub operation */
623 atomic_scrub(virt_addr + offset, size);
625 /* Unmap and complete */
626 kunmap_atomic(virt_addr, KM_BOUNCE_READ);
629 local_irq_restore(flags);
632 /* FIXME - should return -1 */
633 int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, unsigned long page)
635 struct csrow_info *csrows = mci->csrows;
638 debugf1("MC%d: %s(): 0x%lx\n", mci->mc_idx, __func__, page);
641 for (i = 0; i < mci->nr_csrows; i++) {
642 struct csrow_info *csrow = &csrows[i];
644 if (csrow->nr_pages == 0)
647 debugf3("MC%d: %s(): first(0x%lx) page(0x%lx) last(0x%lx) "
648 "mask(0x%lx)\n", mci->mc_idx, __func__,
649 csrow->first_page, page, csrow->last_page,
652 if ((page >= csrow->first_page) &&
653 (page <= csrow->last_page) &&
654 ((page & csrow->page_mask) ==
655 (csrow->first_page & csrow->page_mask))) {
662 edac_mc_printk(mci, KERN_ERR,
663 "could not look up page error address %lx\n",
664 (unsigned long)page);
668 EXPORT_SYMBOL_GPL(edac_mc_find_csrow_by_page);
670 /* FIXME - setable log (warning/emerg) levels */
671 /* FIXME - integrate with evlog: http://evlog.sourceforge.net/ */
672 void edac_mc_handle_ce(struct mem_ctl_info *mci,
673 unsigned long page_frame_number,
674 unsigned long offset_in_page, unsigned long syndrome,
675 int row, int channel, const char *msg)
677 unsigned long remapped_page;
679 debugf3("MC%d: %s()\n", mci->mc_idx, __func__);
681 /* FIXME - maybe make panic on INTERNAL ERROR an option */
682 if (row >= mci->nr_csrows || row < 0) {
683 /* something is wrong */
684 edac_mc_printk(mci, KERN_ERR,
685 "INTERNAL ERROR: row out of range "
686 "(%d >= %d)\n", row, mci->nr_csrows);
687 edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
691 if (channel >= mci->csrows[row].nr_channels || channel < 0) {
692 /* something is wrong */
693 edac_mc_printk(mci, KERN_ERR,
694 "INTERNAL ERROR: channel out of range "
695 "(%d >= %d)\n", channel,
696 mci->csrows[row].nr_channels);
697 edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
701 if (edac_mc_get_log_ce())
702 /* FIXME - put in DIMM location */
703 edac_mc_printk(mci, KERN_WARNING,
704 "CE page 0x%lx, offset 0x%lx, grain %d, syndrome "
705 "0x%lx, row %d, channel %d, label \"%s\": %s\n",
706 page_frame_number, offset_in_page,
707 mci->csrows[row].grain, syndrome, row, channel,
708 mci->csrows[row].channels[channel].label, msg);
711 mci->csrows[row].ce_count++;
712 mci->csrows[row].channels[channel].ce_count++;
714 if (mci->scrub_mode & SCRUB_SW_SRC) {
716 * Some MC's can remap memory so that it is still available
717 * at a different address when PCI devices map into memory.
718 * MC's that can't do this lose the memory where PCI devices
719 * are mapped. This mapping is MC dependant and so we call
720 * back into the MC driver for it to map the MC page to
721 * a physical (CPU) page which can then be mapped to a virtual
722 * page - which can then be scrubbed.
724 remapped_page = mci->ctl_page_to_phys ?
725 mci->ctl_page_to_phys(mci, page_frame_number) :
728 edac_mc_scrub_block(remapped_page, offset_in_page,
729 mci->csrows[row].grain);
732 EXPORT_SYMBOL_GPL(edac_mc_handle_ce);
734 void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, const char *msg)
736 if (edac_mc_get_log_ce())
737 edac_mc_printk(mci, KERN_WARNING,
738 "CE - no information available: %s\n", msg);
740 mci->ce_noinfo_count++;
743 EXPORT_SYMBOL_GPL(edac_mc_handle_ce_no_info);
745 void edac_mc_handle_ue(struct mem_ctl_info *mci,
746 unsigned long page_frame_number,
747 unsigned long offset_in_page, int row, const char *msg)
749 int len = EDAC_MC_LABEL_LEN * 4;
750 char labels[len + 1];
755 debugf3("MC%d: %s()\n", mci->mc_idx, __func__);
757 /* FIXME - maybe make panic on INTERNAL ERROR an option */
758 if (row >= mci->nr_csrows || row < 0) {
759 /* something is wrong */
760 edac_mc_printk(mci, KERN_ERR,
761 "INTERNAL ERROR: row out of range "
762 "(%d >= %d)\n", row, mci->nr_csrows);
763 edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
767 chars = snprintf(pos, len + 1, "%s",
768 mci->csrows[row].channels[0].label);
772 for (chan = 1; (chan < mci->csrows[row].nr_channels) && (len > 0);
774 chars = snprintf(pos, len + 1, ":%s",
775 mci->csrows[row].channels[chan].label);
780 if (edac_mc_get_log_ue())
781 edac_mc_printk(mci, KERN_EMERG,
782 "UE page 0x%lx, offset 0x%lx, grain %d, row %d, "
783 "labels \"%s\": %s\n", page_frame_number,
784 offset_in_page, mci->csrows[row].grain, row,
787 if (edac_mc_get_panic_on_ue())
788 panic("EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, "
789 "row %d, labels \"%s\": %s\n", mci->mc_idx,
790 page_frame_number, offset_in_page,
791 mci->csrows[row].grain, row, labels, msg);
794 mci->csrows[row].ue_count++;
796 EXPORT_SYMBOL_GPL(edac_mc_handle_ue);
798 void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, const char *msg)
800 if (edac_mc_get_panic_on_ue())
801 panic("EDAC MC%d: Uncorrected Error", mci->mc_idx);
803 if (edac_mc_get_log_ue())
804 edac_mc_printk(mci, KERN_WARNING,
805 "UE - no information available: %s\n", msg);
806 mci->ue_noinfo_count++;
809 EXPORT_SYMBOL_GPL(edac_mc_handle_ue_no_info);
811 /*************************************************************
812 * On Fully Buffered DIMM modules, this help function is
813 * called to process UE events
815 void edac_mc_handle_fbd_ue(struct mem_ctl_info *mci,
817 unsigned int channela,
818 unsigned int channelb, char *msg)
820 int len = EDAC_MC_LABEL_LEN * 4;
821 char labels[len + 1];
825 if (csrow >= mci->nr_csrows) {
826 /* something is wrong */
827 edac_mc_printk(mci, KERN_ERR,
828 "INTERNAL ERROR: row out of range (%d >= %d)\n",
829 csrow, mci->nr_csrows);
830 edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
834 if (channela >= mci->csrows[csrow].nr_channels) {
835 /* something is wrong */
836 edac_mc_printk(mci, KERN_ERR,
837 "INTERNAL ERROR: channel-a out of range "
839 channela, mci->csrows[csrow].nr_channels);
840 edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
844 if (channelb >= mci->csrows[csrow].nr_channels) {
845 /* something is wrong */
846 edac_mc_printk(mci, KERN_ERR,
847 "INTERNAL ERROR: channel-b out of range "
849 channelb, mci->csrows[csrow].nr_channels);
850 edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
855 mci->csrows[csrow].ue_count++;
857 /* Generate the DIMM labels from the specified channels */
858 chars = snprintf(pos, len + 1, "%s",
859 mci->csrows[csrow].channels[channela].label);
862 chars = snprintf(pos, len + 1, "-%s",
863 mci->csrows[csrow].channels[channelb].label);
865 if (edac_mc_get_log_ue())
866 edac_mc_printk(mci, KERN_EMERG,
867 "UE row %d, channel-a= %d channel-b= %d "
868 "labels \"%s\": %s\n", csrow, channela, channelb,
871 if (edac_mc_get_panic_on_ue())
872 panic("UE row %d, channel-a= %d channel-b= %d "
873 "labels \"%s\": %s\n", csrow, channela,
874 channelb, labels, msg);
876 EXPORT_SYMBOL(edac_mc_handle_fbd_ue);
878 /*************************************************************
879 * On Fully Buffered DIMM modules, this help function is
880 * called to process CE events
882 void edac_mc_handle_fbd_ce(struct mem_ctl_info *mci,
883 unsigned int csrow, unsigned int channel, char *msg)
886 /* Ensure boundary values */
887 if (csrow >= mci->nr_csrows) {
888 /* something is wrong */
889 edac_mc_printk(mci, KERN_ERR,
890 "INTERNAL ERROR: row out of range (%d >= %d)\n",
891 csrow, mci->nr_csrows);
892 edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
895 if (channel >= mci->csrows[csrow].nr_channels) {
896 /* something is wrong */
897 edac_mc_printk(mci, KERN_ERR,
898 "INTERNAL ERROR: channel out of range (%d >= %d)\n",
899 channel, mci->csrows[csrow].nr_channels);
900 edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
904 if (edac_mc_get_log_ce())
905 /* FIXME - put in DIMM location */
906 edac_mc_printk(mci, KERN_WARNING,
907 "CE row %d, channel %d, label \"%s\": %s\n",
909 mci->csrows[csrow].channels[channel].label, msg);
912 mci->csrows[csrow].ce_count++;
913 mci->csrows[csrow].channels[channel].ce_count++;
915 EXPORT_SYMBOL(edac_mc_handle_fbd_ce);