Commit | Line | Data |
---|---|---|
da9bb1d2 AC |
1 | /* |
2 | * edac_mc kernel module | |
49c0dab7 | 3 | * (C) 2005, 2006 Linux Networx (http://lnxi.com) |
da9bb1d2 AC |
4 | * This file may be distributed under the terms of the |
5 | * GNU General Public License. | |
6 | * | |
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/ | |
10 | * | |
11 | * Modified by Dave Peterson and Doug Thompson | |
12 | * | |
13 | */ | |
14 | ||
da9bb1d2 AC |
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> | |
da9bb1d2 AC |
30 | #include <asm/uaccess.h> |
31 | #include <asm/page.h> | |
32 | #include <asm/edac.h> | |
da9bb1d2 | 33 | #include "edac_mc.h" |
7c9281d7 | 34 | #include "edac_module.h" |
da9bb1d2 | 35 | |
da9bb1d2 | 36 | |
da9bb1d2 | 37 | /* lock to memory controller's control array */ |
63b7df91 | 38 | static DEFINE_MUTEX(mem_ctls_mutex); |
da9bb1d2 AC |
39 | static struct list_head mc_devices = LIST_HEAD_INIT(mc_devices); |
40 | ||
da9bb1d2 AC |
41 | #ifdef CONFIG_EDAC_DEBUG |
42 | ||
2da1c119 | 43 | static void edac_mc_dump_channel(struct channel_info *chan) |
da9bb1d2 AC |
44 | { |
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); | |
50 | } | |
51 | ||
2da1c119 | 52 | static void edac_mc_dump_csrow(struct csrow_info *csrow) |
da9bb1d2 AC |
53 | { |
54 | debugf4("\tcsrow = %p\n", csrow); | |
55 | debugf4("\tcsrow->csrow_idx = %d\n", csrow->csrow_idx); | |
56 | debugf4("\tcsrow->first_page = 0x%lx\n", | |
57 | csrow->first_page); | |
58 | debugf4("\tcsrow->last_page = 0x%lx\n", csrow->last_page); | |
59 | debugf4("\tcsrow->page_mask = 0x%lx\n", csrow->page_mask); | |
60 | debugf4("\tcsrow->nr_pages = 0x%x\n", csrow->nr_pages); | |
61 | debugf4("\tcsrow->nr_channels = %d\n", | |
62 | csrow->nr_channels); | |
63 | debugf4("\tcsrow->channels = %p\n", csrow->channels); | |
64 | debugf4("\tcsrow->mci = %p\n\n", csrow->mci); | |
65 | } | |
66 | ||
2da1c119 | 67 | static void edac_mc_dump_mci(struct mem_ctl_info *mci) |
da9bb1d2 AC |
68 | { |
69 | debugf3("\tmci = %p\n", mci); | |
70 | debugf3("\tmci->mtype_cap = %lx\n", mci->mtype_cap); | |
71 | debugf3("\tmci->edac_ctl_cap = %lx\n", mci->edac_ctl_cap); | |
72 | debugf3("\tmci->edac_cap = %lx\n", mci->edac_cap); | |
73 | debugf4("\tmci->edac_check = %p\n", mci->edac_check); | |
74 | debugf3("\tmci->nr_csrows = %d, csrows = %p\n", | |
75 | mci->nr_csrows, mci->csrows); | |
37f04581 | 76 | debugf3("\tdev = %p\n", mci->dev); |
da9bb1d2 AC |
77 | debugf3("\tmod_name:ctl_name = %s:%s\n", |
78 | mci->mod_name, mci->ctl_name); | |
79 | debugf3("\tpvt_info = %p\n\n", mci->pvt_info); | |
80 | } | |
81 | ||
e7ecd891 | 82 | #endif /* CONFIG_EDAC_DEBUG */ |
da9bb1d2 AC |
83 | |
84 | /* 'ptr' points to a possibly unaligned item X such that sizeof(X) is 'size'. | |
85 | * Adjust 'ptr' so that its alignment is at least as stringent as what the | |
86 | * compiler would provide for X and return the aligned result. | |
87 | * | |
88 | * If 'size' is a constant, the compiler will optimize this whole function | |
89 | * down to either a no-op or the addition of a constant to the value of 'ptr'. | |
90 | */ | |
e27e3dac | 91 | char * edac_align_ptr(void *ptr, unsigned size) |
da9bb1d2 AC |
92 | { |
93 | unsigned align, r; | |
94 | ||
95 | /* Here we assume that the alignment of a "long long" is the most | |
96 | * stringent alignment that the compiler will ever provide by default. | |
97 | * As far as I know, this is a reasonable assumption. | |
98 | */ | |
99 | if (size > sizeof(long)) | |
100 | align = sizeof(long long); | |
101 | else if (size > sizeof(int)) | |
102 | align = sizeof(long); | |
103 | else if (size > sizeof(short)) | |
104 | align = sizeof(int); | |
105 | else if (size > sizeof(char)) | |
106 | align = sizeof(short); | |
107 | else | |
108 | return (char *) ptr; | |
109 | ||
110 | r = size % align; | |
111 | ||
112 | if (r == 0) | |
113 | return (char *) ptr; | |
114 | ||
115 | return (char *) (((unsigned long) ptr) + align - r); | |
116 | } | |
117 | ||
da9bb1d2 AC |
118 | /** |
119 | * edac_mc_alloc: Allocate a struct mem_ctl_info structure | |
120 | * @size_pvt: size of private storage needed | |
121 | * @nr_csrows: Number of CWROWS needed for this MC | |
122 | * @nr_chans: Number of channels for the MC | |
123 | * | |
124 | * Everything is kmalloc'ed as one big chunk - more efficient. | |
125 | * Only can be used if all structures have the same lifetime - otherwise | |
126 | * you have to allocate and initialize your own structures. | |
127 | * | |
128 | * Use edac_mc_free() to free mc structures allocated by this function. | |
129 | * | |
130 | * Returns: | |
131 | * NULL allocation failed | |
132 | * struct mem_ctl_info pointer | |
133 | */ | |
134 | struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows, | |
e7ecd891 | 135 | unsigned nr_chans) |
da9bb1d2 AC |
136 | { |
137 | struct mem_ctl_info *mci; | |
138 | struct csrow_info *csi, *csrow; | |
139 | struct channel_info *chi, *chp, *chan; | |
140 | void *pvt; | |
141 | unsigned size; | |
142 | int row, chn; | |
143 | ||
144 | /* Figure out the offsets of the various items from the start of an mc | |
145 | * structure. We want the alignment of each item to be at least as | |
146 | * stringent as what the compiler would provide if we could simply | |
147 | * hardcode everything into a single struct. | |
148 | */ | |
149 | mci = (struct mem_ctl_info *) 0; | |
e27e3dac | 150 | csi = (struct csrow_info *)edac_align_ptr(&mci[1], sizeof(*csi)); |
da9bb1d2 | 151 | chi = (struct channel_info *) |
e27e3dac DT |
152 | edac_align_ptr(&csi[nr_csrows], sizeof(*chi)); |
153 | pvt = edac_align_ptr(&chi[nr_chans * nr_csrows], sz_pvt); | |
da9bb1d2 AC |
154 | size = ((unsigned long) pvt) + sz_pvt; |
155 | ||
156 | if ((mci = kmalloc(size, GFP_KERNEL)) == NULL) | |
157 | return NULL; | |
158 | ||
159 | /* Adjust pointers so they point within the memory we just allocated | |
160 | * rather than an imaginary chunk of memory located at address 0. | |
161 | */ | |
162 | csi = (struct csrow_info *) (((char *) mci) + ((unsigned long) csi)); | |
163 | chi = (struct channel_info *) (((char *) mci) + ((unsigned long) chi)); | |
164 | pvt = sz_pvt ? (((char *) mci) + ((unsigned long) pvt)) : NULL; | |
165 | ||
e7ecd891 | 166 | memset(mci, 0, size); /* clear all fields */ |
da9bb1d2 AC |
167 | mci->csrows = csi; |
168 | mci->pvt_info = pvt; | |
169 | mci->nr_csrows = nr_csrows; | |
170 | ||
171 | for (row = 0; row < nr_csrows; row++) { | |
172 | csrow = &csi[row]; | |
173 | csrow->csrow_idx = row; | |
174 | csrow->mci = mci; | |
175 | csrow->nr_channels = nr_chans; | |
176 | chp = &chi[row * nr_chans]; | |
177 | csrow->channels = chp; | |
178 | ||
179 | for (chn = 0; chn < nr_chans; chn++) { | |
180 | chan = &chp[chn]; | |
181 | chan->chan_idx = chn; | |
182 | chan->csrow = csrow; | |
183 | } | |
184 | } | |
185 | ||
186 | return mci; | |
187 | } | |
9110540f | 188 | EXPORT_SYMBOL_GPL(edac_mc_alloc); |
da9bb1d2 | 189 | |
da9bb1d2 AC |
190 | /** |
191 | * edac_mc_free: Free a previously allocated 'mci' structure | |
192 | * @mci: pointer to a struct mem_ctl_info structure | |
da9bb1d2 AC |
193 | */ |
194 | void edac_mc_free(struct mem_ctl_info *mci) | |
195 | { | |
472678eb | 196 | kfree(mci); |
da9bb1d2 | 197 | } |
9110540f | 198 | EXPORT_SYMBOL_GPL(edac_mc_free); |
da9bb1d2 | 199 | |
37f04581 | 200 | static struct mem_ctl_info *find_mci_by_dev(struct device *dev) |
da9bb1d2 AC |
201 | { |
202 | struct mem_ctl_info *mci; | |
203 | struct list_head *item; | |
204 | ||
537fba28 | 205 | debugf3("%s()\n", __func__); |
da9bb1d2 AC |
206 | |
207 | list_for_each(item, &mc_devices) { | |
208 | mci = list_entry(item, struct mem_ctl_info, link); | |
209 | ||
37f04581 | 210 | if (mci->dev == dev) |
da9bb1d2 AC |
211 | return mci; |
212 | } | |
213 | ||
214 | return NULL; | |
215 | } | |
216 | ||
2d7bbb91 DT |
217 | /* Return 0 on success, 1 on failure. |
218 | * Before calling this function, caller must | |
219 | * assign a unique value to mci->mc_idx. | |
220 | */ | |
221 | static int add_mc_to_global_list (struct mem_ctl_info *mci) | |
da9bb1d2 AC |
222 | { |
223 | struct list_head *item, *insert_before; | |
224 | struct mem_ctl_info *p; | |
da9bb1d2 | 225 | |
2d7bbb91 | 226 | insert_before = &mc_devices; |
da9bb1d2 | 227 | |
2d7bbb91 DT |
228 | if (unlikely((p = find_mci_by_dev(mci->dev)) != NULL)) |
229 | goto fail0; | |
da9bb1d2 | 230 | |
2d7bbb91 DT |
231 | list_for_each(item, &mc_devices) { |
232 | p = list_entry(item, struct mem_ctl_info, link); | |
da9bb1d2 | 233 | |
2d7bbb91 DT |
234 | if (p->mc_idx >= mci->mc_idx) { |
235 | if (unlikely(p->mc_idx == mci->mc_idx)) | |
236 | goto fail1; | |
da9bb1d2 | 237 | |
2d7bbb91 DT |
238 | insert_before = item; |
239 | break; | |
da9bb1d2 | 240 | } |
da9bb1d2 AC |
241 | } |
242 | ||
243 | list_add_tail_rcu(&mci->link, insert_before); | |
244 | return 0; | |
2d7bbb91 DT |
245 | |
246 | fail0: | |
247 | edac_printk(KERN_WARNING, EDAC_MC, | |
248 | "%s (%s) %s %s already assigned %d\n", p->dev->bus_id, | |
249 | dev_name(p->dev), p->mod_name, p->ctl_name, p->mc_idx); | |
250 | return 1; | |
251 | ||
252 | fail1: | |
253 | edac_printk(KERN_WARNING, EDAC_MC, | |
254 | "bug in low-level driver: attempt to assign\n" | |
255 | " duplicate mc_idx %d in %s()\n", p->mc_idx, __func__); | |
256 | return 1; | |
da9bb1d2 AC |
257 | } |
258 | ||
e7ecd891 | 259 | static void complete_mc_list_del(struct rcu_head *head) |
a1d03fcc DP |
260 | { |
261 | struct mem_ctl_info *mci; | |
262 | ||
263 | mci = container_of(head, struct mem_ctl_info, rcu); | |
264 | INIT_LIST_HEAD(&mci->link); | |
265 | complete(&mci->complete); | |
266 | } | |
267 | ||
e7ecd891 | 268 | static void del_mc_from_global_list(struct mem_ctl_info *mci) |
a1d03fcc DP |
269 | { |
270 | list_del_rcu(&mci->link); | |
271 | init_completion(&mci->complete); | |
272 | call_rcu(&mci->rcu, complete_mc_list_del); | |
273 | wait_for_completion(&mci->complete); | |
274 | } | |
275 | ||
5da0831c DT |
276 | /** |
277 | * edac_mc_find: Search for a mem_ctl_info structure whose index is 'idx'. | |
278 | * | |
279 | * If found, return a pointer to the structure. | |
280 | * Else return NULL. | |
281 | * | |
282 | * Caller must hold mem_ctls_mutex. | |
283 | */ | |
284 | struct mem_ctl_info * edac_mc_find(int idx) | |
285 | { | |
286 | struct list_head *item; | |
287 | struct mem_ctl_info *mci; | |
288 | ||
289 | list_for_each(item, &mc_devices) { | |
290 | mci = list_entry(item, struct mem_ctl_info, link); | |
291 | ||
292 | if (mci->mc_idx >= idx) { | |
293 | if (mci->mc_idx == idx) | |
294 | return mci; | |
295 | ||
296 | break; | |
297 | } | |
298 | } | |
299 | ||
300 | return NULL; | |
301 | } | |
302 | EXPORT_SYMBOL(edac_mc_find); | |
303 | ||
da9bb1d2 | 304 | /** |
472678eb DP |
305 | * edac_mc_add_mc: Insert the 'mci' structure into the mci global list and |
306 | * create sysfs entries associated with mci structure | |
da9bb1d2 | 307 | * @mci: pointer to the mci structure to be added to the list |
2d7bbb91 | 308 | * @mc_idx: A unique numeric identifier to be assigned to the 'mci' structure. |
da9bb1d2 AC |
309 | * |
310 | * Return: | |
311 | * 0 Success | |
312 | * !0 Failure | |
313 | */ | |
314 | ||
315 | /* FIXME - should a warning be printed if no error detection? correction? */ | |
2d7bbb91 | 316 | int edac_mc_add_mc(struct mem_ctl_info *mci, int mc_idx) |
da9bb1d2 | 317 | { |
537fba28 | 318 | debugf0("%s()\n", __func__); |
2d7bbb91 | 319 | mci->mc_idx = mc_idx; |
da9bb1d2 AC |
320 | #ifdef CONFIG_EDAC_DEBUG |
321 | if (edac_debug_level >= 3) | |
322 | edac_mc_dump_mci(mci); | |
e7ecd891 | 323 | |
da9bb1d2 AC |
324 | if (edac_debug_level >= 4) { |
325 | int i; | |
326 | ||
327 | for (i = 0; i < mci->nr_csrows; i++) { | |
328 | int j; | |
e7ecd891 | 329 | |
da9bb1d2 AC |
330 | edac_mc_dump_csrow(&mci->csrows[i]); |
331 | for (j = 0; j < mci->csrows[i].nr_channels; j++) | |
e7ecd891 DP |
332 | edac_mc_dump_channel( |
333 | &mci->csrows[i].channels[j]); | |
da9bb1d2 AC |
334 | } |
335 | } | |
336 | #endif | |
63b7df91 | 337 | mutex_lock(&mem_ctls_mutex); |
da9bb1d2 AC |
338 | |
339 | if (add_mc_to_global_list(mci)) | |
028a7b6d | 340 | goto fail0; |
da9bb1d2 AC |
341 | |
342 | /* set load time so that error rate can be tracked */ | |
343 | mci->start_time = jiffies; | |
344 | ||
9794f33d | 345 | if (edac_create_sysfs_mci_device(mci)) { |
346 | edac_mc_printk(mci, KERN_WARNING, | |
537fba28 | 347 | "failed to create sysfs device\n"); |
9794f33d | 348 | goto fail1; |
349 | } | |
da9bb1d2 AC |
350 | |
351 | /* Report action taken */ | |
37f04581 DT |
352 | edac_mc_printk(mci, KERN_INFO, "Giving out device to %s %s: DEV %s\n", |
353 | mci->mod_name, mci->ctl_name, dev_name(mci->dev)); | |
da9bb1d2 | 354 | |
63b7df91 | 355 | mutex_unlock(&mem_ctls_mutex); |
028a7b6d | 356 | return 0; |
da9bb1d2 | 357 | |
028a7b6d DP |
358 | fail1: |
359 | del_mc_from_global_list(mci); | |
360 | ||
361 | fail0: | |
63b7df91 | 362 | mutex_unlock(&mem_ctls_mutex); |
028a7b6d | 363 | return 1; |
da9bb1d2 | 364 | } |
9110540f | 365 | EXPORT_SYMBOL_GPL(edac_mc_add_mc); |
da9bb1d2 | 366 | |
da9bb1d2 | 367 | /** |
472678eb DP |
368 | * edac_mc_del_mc: Remove sysfs entries for specified mci structure and |
369 | * remove mci structure from global list | |
37f04581 | 370 | * @pdev: Pointer to 'struct device' representing mci structure to remove. |
da9bb1d2 | 371 | * |
18dbc337 | 372 | * Return pointer to removed mci structure, or NULL if device not found. |
da9bb1d2 | 373 | */ |
37f04581 | 374 | struct mem_ctl_info * edac_mc_del_mc(struct device *dev) |
da9bb1d2 | 375 | { |
18dbc337 | 376 | struct mem_ctl_info *mci; |
da9bb1d2 | 377 | |
18dbc337 | 378 | debugf0("MC: %s()\n", __func__); |
63b7df91 | 379 | mutex_lock(&mem_ctls_mutex); |
18dbc337 | 380 | |
37f04581 | 381 | if ((mci = find_mci_by_dev(dev)) == NULL) { |
63b7df91 | 382 | mutex_unlock(&mem_ctls_mutex); |
18dbc337 DP |
383 | return NULL; |
384 | } | |
385 | ||
386 | edac_remove_sysfs_mci_device(mci); | |
da9bb1d2 | 387 | del_mc_from_global_list(mci); |
63b7df91 | 388 | mutex_unlock(&mem_ctls_mutex); |
537fba28 | 389 | edac_printk(KERN_INFO, EDAC_MC, |
37f04581 DT |
390 | "Removed device %d for %s %s: DEV %s\n", mci->mc_idx, |
391 | mci->mod_name, mci->ctl_name, dev_name(mci->dev)); | |
18dbc337 | 392 | return mci; |
da9bb1d2 | 393 | } |
9110540f | 394 | EXPORT_SYMBOL_GPL(edac_mc_del_mc); |
da9bb1d2 | 395 | |
2da1c119 AB |
396 | static void edac_mc_scrub_block(unsigned long page, unsigned long offset, |
397 | u32 size) | |
da9bb1d2 AC |
398 | { |
399 | struct page *pg; | |
400 | void *virt_addr; | |
401 | unsigned long flags = 0; | |
402 | ||
537fba28 | 403 | debugf3("%s()\n", __func__); |
da9bb1d2 AC |
404 | |
405 | /* ECC error page was not in our memory. Ignore it. */ | |
406 | if(!pfn_valid(page)) | |
407 | return; | |
408 | ||
409 | /* Find the actual page structure then map it and fix */ | |
410 | pg = pfn_to_page(page); | |
411 | ||
412 | if (PageHighMem(pg)) | |
413 | local_irq_save(flags); | |
414 | ||
415 | virt_addr = kmap_atomic(pg, KM_BOUNCE_READ); | |
416 | ||
417 | /* Perform architecture specific atomic scrub operation */ | |
418 | atomic_scrub(virt_addr + offset, size); | |
419 | ||
420 | /* Unmap and complete */ | |
421 | kunmap_atomic(virt_addr, KM_BOUNCE_READ); | |
422 | ||
423 | if (PageHighMem(pg)) | |
424 | local_irq_restore(flags); | |
425 | } | |
426 | ||
da9bb1d2 | 427 | /* FIXME - should return -1 */ |
e7ecd891 | 428 | int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, unsigned long page) |
da9bb1d2 AC |
429 | { |
430 | struct csrow_info *csrows = mci->csrows; | |
431 | int row, i; | |
432 | ||
537fba28 | 433 | debugf1("MC%d: %s(): 0x%lx\n", mci->mc_idx, __func__, page); |
da9bb1d2 AC |
434 | row = -1; |
435 | ||
436 | for (i = 0; i < mci->nr_csrows; i++) { | |
437 | struct csrow_info *csrow = &csrows[i]; | |
438 | ||
439 | if (csrow->nr_pages == 0) | |
440 | continue; | |
441 | ||
537fba28 DP |
442 | debugf3("MC%d: %s(): first(0x%lx) page(0x%lx) last(0x%lx) " |
443 | "mask(0x%lx)\n", mci->mc_idx, __func__, | |
444 | csrow->first_page, page, csrow->last_page, | |
445 | csrow->page_mask); | |
da9bb1d2 AC |
446 | |
447 | if ((page >= csrow->first_page) && | |
448 | (page <= csrow->last_page) && | |
449 | ((page & csrow->page_mask) == | |
450 | (csrow->first_page & csrow->page_mask))) { | |
451 | row = i; | |
452 | break; | |
453 | } | |
454 | } | |
455 | ||
456 | if (row == -1) | |
537fba28 DP |
457 | edac_mc_printk(mci, KERN_ERR, |
458 | "could not look up page error address %lx\n", | |
459 | (unsigned long) page); | |
da9bb1d2 AC |
460 | |
461 | return row; | |
462 | } | |
9110540f | 463 | EXPORT_SYMBOL_GPL(edac_mc_find_csrow_by_page); |
da9bb1d2 | 464 | |
da9bb1d2 AC |
465 | /* FIXME - setable log (warning/emerg) levels */ |
466 | /* FIXME - integrate with evlog: http://evlog.sourceforge.net/ */ | |
467 | void edac_mc_handle_ce(struct mem_ctl_info *mci, | |
e7ecd891 DP |
468 | unsigned long page_frame_number, unsigned long offset_in_page, |
469 | unsigned long syndrome, int row, int channel, const char *msg) | |
da9bb1d2 AC |
470 | { |
471 | unsigned long remapped_page; | |
472 | ||
537fba28 | 473 | debugf3("MC%d: %s()\n", mci->mc_idx, __func__); |
da9bb1d2 AC |
474 | |
475 | /* FIXME - maybe make panic on INTERNAL ERROR an option */ | |
476 | if (row >= mci->nr_csrows || row < 0) { | |
477 | /* something is wrong */ | |
537fba28 DP |
478 | edac_mc_printk(mci, KERN_ERR, |
479 | "INTERNAL ERROR: row out of range " | |
480 | "(%d >= %d)\n", row, mci->nr_csrows); | |
da9bb1d2 AC |
481 | edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); |
482 | return; | |
483 | } | |
e7ecd891 | 484 | |
da9bb1d2 AC |
485 | if (channel >= mci->csrows[row].nr_channels || channel < 0) { |
486 | /* something is wrong */ | |
537fba28 DP |
487 | edac_mc_printk(mci, KERN_ERR, |
488 | "INTERNAL ERROR: channel out of range " | |
489 | "(%d >= %d)\n", channel, | |
490 | mci->csrows[row].nr_channels); | |
da9bb1d2 AC |
491 | edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); |
492 | return; | |
493 | } | |
494 | ||
7c9281d7 | 495 | if (edac_get_log_ce()) |
da9bb1d2 | 496 | /* FIXME - put in DIMM location */ |
537fba28 DP |
497 | edac_mc_printk(mci, KERN_WARNING, |
498 | "CE page 0x%lx, offset 0x%lx, grain %d, syndrome " | |
499 | "0x%lx, row %d, channel %d, label \"%s\": %s\n", | |
500 | page_frame_number, offset_in_page, | |
501 | mci->csrows[row].grain, syndrome, row, channel, | |
502 | mci->csrows[row].channels[channel].label, msg); | |
da9bb1d2 AC |
503 | |
504 | mci->ce_count++; | |
505 | mci->csrows[row].ce_count++; | |
506 | mci->csrows[row].channels[channel].ce_count++; | |
507 | ||
508 | if (mci->scrub_mode & SCRUB_SW_SRC) { | |
509 | /* | |
510 | * Some MC's can remap memory so that it is still available | |
511 | * at a different address when PCI devices map into memory. | |
512 | * MC's that can't do this lose the memory where PCI devices | |
513 | * are mapped. This mapping is MC dependant and so we call | |
514 | * back into the MC driver for it to map the MC page to | |
515 | * a physical (CPU) page which can then be mapped to a virtual | |
516 | * page - which can then be scrubbed. | |
517 | */ | |
518 | remapped_page = mci->ctl_page_to_phys ? | |
519 | mci->ctl_page_to_phys(mci, page_frame_number) : | |
520 | page_frame_number; | |
521 | ||
522 | edac_mc_scrub_block(remapped_page, offset_in_page, | |
e7ecd891 | 523 | mci->csrows[row].grain); |
da9bb1d2 AC |
524 | } |
525 | } | |
9110540f | 526 | EXPORT_SYMBOL_GPL(edac_mc_handle_ce); |
da9bb1d2 | 527 | |
e7ecd891 | 528 | void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, const char *msg) |
da9bb1d2 | 529 | { |
7c9281d7 | 530 | if (edac_get_log_ce()) |
537fba28 DP |
531 | edac_mc_printk(mci, KERN_WARNING, |
532 | "CE - no information available: %s\n", msg); | |
e7ecd891 | 533 | |
da9bb1d2 AC |
534 | mci->ce_noinfo_count++; |
535 | mci->ce_count++; | |
536 | } | |
9110540f | 537 | EXPORT_SYMBOL_GPL(edac_mc_handle_ce_no_info); |
da9bb1d2 | 538 | |
da9bb1d2 | 539 | void edac_mc_handle_ue(struct mem_ctl_info *mci, |
e7ecd891 DP |
540 | unsigned long page_frame_number, unsigned long offset_in_page, |
541 | int row, const char *msg) | |
da9bb1d2 AC |
542 | { |
543 | int len = EDAC_MC_LABEL_LEN * 4; | |
544 | char labels[len + 1]; | |
545 | char *pos = labels; | |
546 | int chan; | |
547 | int chars; | |
548 | ||
537fba28 | 549 | debugf3("MC%d: %s()\n", mci->mc_idx, __func__); |
da9bb1d2 AC |
550 | |
551 | /* FIXME - maybe make panic on INTERNAL ERROR an option */ | |
552 | if (row >= mci->nr_csrows || row < 0) { | |
553 | /* something is wrong */ | |
537fba28 DP |
554 | edac_mc_printk(mci, KERN_ERR, |
555 | "INTERNAL ERROR: row out of range " | |
556 | "(%d >= %d)\n", row, mci->nr_csrows); | |
da9bb1d2 AC |
557 | edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); |
558 | return; | |
559 | } | |
560 | ||
561 | chars = snprintf(pos, len + 1, "%s", | |
e7ecd891 | 562 | mci->csrows[row].channels[0].label); |
da9bb1d2 AC |
563 | len -= chars; |
564 | pos += chars; | |
e7ecd891 | 565 | |
da9bb1d2 AC |
566 | for (chan = 1; (chan < mci->csrows[row].nr_channels) && (len > 0); |
567 | chan++) { | |
568 | chars = snprintf(pos, len + 1, ":%s", | |
e7ecd891 | 569 | mci->csrows[row].channels[chan].label); |
da9bb1d2 AC |
570 | len -= chars; |
571 | pos += chars; | |
572 | } | |
573 | ||
7c9281d7 | 574 | if (edac_get_log_ue()) |
537fba28 DP |
575 | edac_mc_printk(mci, KERN_EMERG, |
576 | "UE page 0x%lx, offset 0x%lx, grain %d, row %d, " | |
577 | "labels \"%s\": %s\n", page_frame_number, | |
578 | offset_in_page, mci->csrows[row].grain, row, labels, | |
579 | msg); | |
da9bb1d2 | 580 | |
7c9281d7 | 581 | if (edac_get_panic_on_ue()) |
e7ecd891 DP |
582 | panic("EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, " |
583 | "row %d, labels \"%s\": %s\n", mci->mc_idx, | |
584 | page_frame_number, offset_in_page, | |
585 | mci->csrows[row].grain, row, labels, msg); | |
da9bb1d2 AC |
586 | |
587 | mci->ue_count++; | |
588 | mci->csrows[row].ue_count++; | |
589 | } | |
9110540f | 590 | EXPORT_SYMBOL_GPL(edac_mc_handle_ue); |
da9bb1d2 | 591 | |
e7ecd891 | 592 | void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, const char *msg) |
da9bb1d2 | 593 | { |
7c9281d7 | 594 | if (edac_get_panic_on_ue()) |
da9bb1d2 AC |
595 | panic("EDAC MC%d: Uncorrected Error", mci->mc_idx); |
596 | ||
7c9281d7 | 597 | if (edac_get_log_ue()) |
537fba28 DP |
598 | edac_mc_printk(mci, KERN_WARNING, |
599 | "UE - no information available: %s\n", msg); | |
da9bb1d2 AC |
600 | mci->ue_noinfo_count++; |
601 | mci->ue_count++; | |
602 | } | |
9110540f | 603 | EXPORT_SYMBOL_GPL(edac_mc_handle_ue_no_info); |
da9bb1d2 | 604 | |
da9bb1d2 | 605 | |
9794f33d | 606 | /************************************************************* |
607 | * On Fully Buffered DIMM modules, this help function is | |
608 | * called to process UE events | |
609 | */ | |
610 | void edac_mc_handle_fbd_ue(struct mem_ctl_info *mci, | |
611 | unsigned int csrow, | |
612 | unsigned int channela, | |
613 | unsigned int channelb, | |
614 | char *msg) | |
615 | { | |
616 | int len = EDAC_MC_LABEL_LEN * 4; | |
617 | char labels[len + 1]; | |
618 | char *pos = labels; | |
619 | int chars; | |
620 | ||
621 | if (csrow >= mci->nr_csrows) { | |
622 | /* something is wrong */ | |
623 | edac_mc_printk(mci, KERN_ERR, | |
624 | "INTERNAL ERROR: row out of range (%d >= %d)\n", | |
625 | csrow, mci->nr_csrows); | |
626 | edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); | |
627 | return; | |
628 | } | |
629 | ||
630 | if (channela >= mci->csrows[csrow].nr_channels) { | |
631 | /* something is wrong */ | |
632 | edac_mc_printk(mci, KERN_ERR, | |
633 | "INTERNAL ERROR: channel-a out of range " | |
634 | "(%d >= %d)\n", | |
635 | channela, mci->csrows[csrow].nr_channels); | |
636 | edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); | |
637 | return; | |
638 | } | |
639 | ||
640 | if (channelb >= mci->csrows[csrow].nr_channels) { | |
641 | /* something is wrong */ | |
642 | edac_mc_printk(mci, KERN_ERR, | |
643 | "INTERNAL ERROR: channel-b out of range " | |
644 | "(%d >= %d)\n", | |
645 | channelb, mci->csrows[csrow].nr_channels); | |
646 | edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); | |
647 | return; | |
648 | } | |
649 | ||
650 | mci->ue_count++; | |
651 | mci->csrows[csrow].ue_count++; | |
652 | ||
653 | /* Generate the DIMM labels from the specified channels */ | |
654 | chars = snprintf(pos, len + 1, "%s", | |
655 | mci->csrows[csrow].channels[channela].label); | |
656 | len -= chars; pos += chars; | |
657 | chars = snprintf(pos, len + 1, "-%s", | |
658 | mci->csrows[csrow].channels[channelb].label); | |
659 | ||
7c9281d7 | 660 | if (edac_get_log_ue()) |
9794f33d | 661 | edac_mc_printk(mci, KERN_EMERG, |
662 | "UE row %d, channel-a= %d channel-b= %d " | |
663 | "labels \"%s\": %s\n", csrow, channela, channelb, | |
664 | labels, msg); | |
665 | ||
7c9281d7 | 666 | if (edac_get_panic_on_ue()) |
9794f33d | 667 | panic("UE row %d, channel-a= %d channel-b= %d " |
668 | "labels \"%s\": %s\n", csrow, channela, | |
669 | channelb, labels, msg); | |
670 | } | |
671 | EXPORT_SYMBOL(edac_mc_handle_fbd_ue); | |
672 | ||
673 | /************************************************************* | |
674 | * On Fully Buffered DIMM modules, this help function is | |
675 | * called to process CE events | |
676 | */ | |
677 | void edac_mc_handle_fbd_ce(struct mem_ctl_info *mci, | |
678 | unsigned int csrow, | |
679 | unsigned int channel, | |
680 | char *msg) | |
681 | { | |
682 | ||
683 | /* Ensure boundary values */ | |
684 | if (csrow >= mci->nr_csrows) { | |
685 | /* something is wrong */ | |
686 | edac_mc_printk(mci, KERN_ERR, | |
687 | "INTERNAL ERROR: row out of range (%d >= %d)\n", | |
688 | csrow, mci->nr_csrows); | |
689 | edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); | |
690 | return; | |
691 | } | |
692 | if (channel >= mci->csrows[csrow].nr_channels) { | |
693 | /* something is wrong */ | |
694 | edac_mc_printk(mci, KERN_ERR, | |
695 | "INTERNAL ERROR: channel out of range (%d >= %d)\n", | |
696 | channel, mci->csrows[csrow].nr_channels); | |
697 | edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); | |
698 | return; | |
699 | } | |
700 | ||
7c9281d7 | 701 | if (edac_get_log_ce()) |
9794f33d | 702 | /* FIXME - put in DIMM location */ |
703 | edac_mc_printk(mci, KERN_WARNING, | |
704 | "CE row %d, channel %d, label \"%s\": %s\n", | |
705 | csrow, channel, | |
706 | mci->csrows[csrow].channels[channel].label, | |
707 | msg); | |
708 | ||
709 | mci->ce_count++; | |
710 | mci->csrows[csrow].ce_count++; | |
711 | mci->csrows[csrow].channels[channel].ce_count++; | |
712 | } | |
713 | EXPORT_SYMBOL(edac_mc_handle_fbd_ce); | |
714 | ||
715 | ||
da9bb1d2 AC |
716 | /* |
717 | * Iterate over all MC instances and check for ECC, et al, errors | |
718 | */ | |
7c9281d7 | 719 | void edac_check_mc_devices(void) |
da9bb1d2 | 720 | { |
da9bb1d2 AC |
721 | struct list_head *item; |
722 | struct mem_ctl_info *mci; | |
723 | ||
537fba28 | 724 | debugf3("%s()\n", __func__); |
63b7df91 | 725 | mutex_lock(&mem_ctls_mutex); |
da9bb1d2 AC |
726 | |
727 | list_for_each(item, &mc_devices) { | |
728 | mci = list_entry(item, struct mem_ctl_info, link); | |
729 | ||
730 | if (mci->edac_check != NULL) | |
731 | mci->edac_check(mci); | |
732 | } | |
733 | ||
63b7df91 | 734 | mutex_unlock(&mem_ctls_mutex); |
da9bb1d2 | 735 | } |