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1 | /* |
2 | * edac_mc kernel module | |
3 | * (C) 2005 Linux Networx (http://lnxi.com) | |
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 | ||
15 | ||
16 | #include <linux/config.h> | |
17 | #include <linux/version.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/proc_fs.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/types.h> | |
22 | #include <linux/smp.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/sysctl.h> | |
25 | #include <linux/highmem.h> | |
26 | #include <linux/timer.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/jiffies.h> | |
29 | #include <linux/spinlock.h> | |
30 | #include <linux/list.h> | |
31 | #include <linux/sysdev.h> | |
32 | #include <linux/ctype.h> | |
33 | ||
34 | #include <asm/uaccess.h> | |
35 | #include <asm/page.h> | |
36 | #include <asm/edac.h> | |
37 | ||
38 | #include "edac_mc.h" | |
39 | ||
40 | #define EDAC_MC_VERSION "edac_mc Ver: 2.0.0 " __DATE__ | |
41 | ||
42 | #ifdef CONFIG_EDAC_DEBUG | |
43 | /* Values of 0 to 4 will generate output */ | |
44 | int edac_debug_level = 1; | |
45 | EXPORT_SYMBOL(edac_debug_level); | |
46 | #endif | |
47 | ||
48 | /* EDAC Controls, setable by module parameter, and sysfs */ | |
49 | static int log_ue = 1; | |
50 | static int log_ce = 1; | |
51 | static int panic_on_ue = 1; | |
52 | static int poll_msec = 1000; | |
53 | ||
54 | static int check_pci_parity = 0; /* default YES check PCI parity */ | |
55 | static int panic_on_pci_parity; /* default no panic on PCI Parity */ | |
56 | static atomic_t pci_parity_count = ATOMIC_INIT(0); | |
57 | ||
58 | /* lock to memory controller's control array */ | |
59 | static DECLARE_MUTEX(mem_ctls_mutex); | |
60 | static struct list_head mc_devices = LIST_HEAD_INIT(mc_devices); | |
61 | ||
62 | /* Structure of the whitelist and blacklist arrays */ | |
63 | struct edac_pci_device_list { | |
64 | unsigned int vendor; /* Vendor ID */ | |
65 | unsigned int device; /* Deviice ID */ | |
66 | }; | |
67 | ||
68 | ||
69 | #define MAX_LISTED_PCI_DEVICES 32 | |
70 | ||
71 | /* List of PCI devices (vendor-id:device-id) that should be skipped */ | |
72 | static struct edac_pci_device_list pci_blacklist[MAX_LISTED_PCI_DEVICES]; | |
73 | static int pci_blacklist_count; | |
74 | ||
75 | /* List of PCI devices (vendor-id:device-id) that should be scanned */ | |
76 | static struct edac_pci_device_list pci_whitelist[MAX_LISTED_PCI_DEVICES]; | |
77 | static int pci_whitelist_count ; | |
78 | ||
79 | /* START sysfs data and methods */ | |
80 | ||
81 | static const char *mem_types[] = { | |
82 | [MEM_EMPTY] = "Empty", | |
83 | [MEM_RESERVED] = "Reserved", | |
84 | [MEM_UNKNOWN] = "Unknown", | |
85 | [MEM_FPM] = "FPM", | |
86 | [MEM_EDO] = "EDO", | |
87 | [MEM_BEDO] = "BEDO", | |
88 | [MEM_SDR] = "Unbuffered-SDR", | |
89 | [MEM_RDR] = "Registered-SDR", | |
90 | [MEM_DDR] = "Unbuffered-DDR", | |
91 | [MEM_RDDR] = "Registered-DDR", | |
92 | [MEM_RMBS] = "RMBS" | |
93 | }; | |
94 | ||
95 | static const char *dev_types[] = { | |
96 | [DEV_UNKNOWN] = "Unknown", | |
97 | [DEV_X1] = "x1", | |
98 | [DEV_X2] = "x2", | |
99 | [DEV_X4] = "x4", | |
100 | [DEV_X8] = "x8", | |
101 | [DEV_X16] = "x16", | |
102 | [DEV_X32] = "x32", | |
103 | [DEV_X64] = "x64" | |
104 | }; | |
105 | ||
106 | static const char *edac_caps[] = { | |
107 | [EDAC_UNKNOWN] = "Unknown", | |
108 | [EDAC_NONE] = "None", | |
109 | [EDAC_RESERVED] = "Reserved", | |
110 | [EDAC_PARITY] = "PARITY", | |
111 | [EDAC_EC] = "EC", | |
112 | [EDAC_SECDED] = "SECDED", | |
113 | [EDAC_S2ECD2ED] = "S2ECD2ED", | |
114 | [EDAC_S4ECD4ED] = "S4ECD4ED", | |
115 | [EDAC_S8ECD8ED] = "S8ECD8ED", | |
116 | [EDAC_S16ECD16ED] = "S16ECD16ED" | |
117 | }; | |
118 | ||
119 | ||
120 | /* sysfs object: /sys/devices/system/edac */ | |
121 | static struct sysdev_class edac_class = { | |
122 | set_kset_name("edac"), | |
123 | }; | |
124 | ||
125 | /* sysfs objects: | |
126 | * /sys/devices/system/edac/mc | |
127 | * /sys/devices/system/edac/pci | |
128 | */ | |
129 | static struct kobject edac_memctrl_kobj; | |
130 | static struct kobject edac_pci_kobj; | |
131 | ||
132 | /* | |
133 | * /sys/devices/system/edac/mc; | |
134 | * data structures and methods | |
135 | */ | |
136 | static ssize_t memctrl_string_show(void *ptr, char *buffer) | |
137 | { | |
138 | char *value = (char*) ptr; | |
139 | return sprintf(buffer, "%s\n", value); | |
140 | } | |
141 | ||
142 | static ssize_t memctrl_int_show(void *ptr, char *buffer) | |
143 | { | |
144 | int *value = (int*) ptr; | |
145 | return sprintf(buffer, "%d\n", *value); | |
146 | } | |
147 | ||
148 | static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count) | |
149 | { | |
150 | int *value = (int*) ptr; | |
151 | ||
152 | if (isdigit(*buffer)) | |
153 | *value = simple_strtoul(buffer, NULL, 0); | |
154 | ||
155 | return count; | |
156 | } | |
157 | ||
158 | struct memctrl_dev_attribute { | |
159 | struct attribute attr; | |
160 | void *value; | |
161 | ssize_t (*show)(void *,char *); | |
162 | ssize_t (*store)(void *, const char *, size_t); | |
163 | }; | |
164 | ||
165 | /* Set of show/store abstract level functions for memory control object */ | |
166 | static ssize_t | |
167 | memctrl_dev_show(struct kobject *kobj, struct attribute *attr, char *buffer) | |
168 | { | |
169 | struct memctrl_dev_attribute *memctrl_dev; | |
170 | memctrl_dev = (struct memctrl_dev_attribute*)attr; | |
171 | ||
172 | if (memctrl_dev->show) | |
173 | return memctrl_dev->show(memctrl_dev->value, buffer); | |
174 | return -EIO; | |
175 | } | |
176 | ||
177 | static ssize_t | |
178 | memctrl_dev_store(struct kobject *kobj, struct attribute *attr, | |
179 | const char *buffer, size_t count) | |
180 | { | |
181 | struct memctrl_dev_attribute *memctrl_dev; | |
182 | memctrl_dev = (struct memctrl_dev_attribute*)attr; | |
183 | ||
184 | if (memctrl_dev->store) | |
185 | return memctrl_dev->store(memctrl_dev->value, buffer, count); | |
186 | return -EIO; | |
187 | } | |
188 | ||
189 | static struct sysfs_ops memctrlfs_ops = { | |
190 | .show = memctrl_dev_show, | |
191 | .store = memctrl_dev_store | |
192 | }; | |
193 | ||
194 | #define MEMCTRL_ATTR(_name,_mode,_show,_store) \ | |
195 | struct memctrl_dev_attribute attr_##_name = { \ | |
196 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
197 | .value = &_name, \ | |
198 | .show = _show, \ | |
199 | .store = _store, \ | |
200 | }; | |
201 | ||
202 | #define MEMCTRL_STRING_ATTR(_name,_data,_mode,_show,_store) \ | |
203 | struct memctrl_dev_attribute attr_##_name = { \ | |
204 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
205 | .value = _data, \ | |
206 | .show = _show, \ | |
207 | .store = _store, \ | |
208 | }; | |
209 | ||
210 | /* cwrow<id> attribute f*/ | |
211 | MEMCTRL_STRING_ATTR(mc_version,EDAC_MC_VERSION,S_IRUGO,memctrl_string_show,NULL); | |
212 | ||
213 | /* csrow<id> control files */ | |
214 | MEMCTRL_ATTR(panic_on_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); | |
215 | MEMCTRL_ATTR(log_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); | |
216 | MEMCTRL_ATTR(log_ce,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); | |
217 | MEMCTRL_ATTR(poll_msec,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); | |
218 | ||
219 | ||
220 | /* Base Attributes of the memory ECC object */ | |
221 | static struct memctrl_dev_attribute *memctrl_attr[] = { | |
222 | &attr_panic_on_ue, | |
223 | &attr_log_ue, | |
224 | &attr_log_ce, | |
225 | &attr_poll_msec, | |
226 | &attr_mc_version, | |
227 | NULL, | |
228 | }; | |
229 | ||
230 | /* Main MC kobject release() function */ | |
231 | static void edac_memctrl_master_release(struct kobject *kobj) | |
232 | { | |
233 | debugf1("EDAC MC: " __FILE__ ": %s()\n", __func__); | |
234 | } | |
235 | ||
236 | static struct kobj_type ktype_memctrl = { | |
237 | .release = edac_memctrl_master_release, | |
238 | .sysfs_ops = &memctrlfs_ops, | |
239 | .default_attrs = (struct attribute **) memctrl_attr, | |
240 | }; | |
241 | ||
242 | ||
243 | /* Initialize the main sysfs entries for edac: | |
244 | * /sys/devices/system/edac | |
245 | * | |
246 | * and children | |
247 | * | |
248 | * Return: 0 SUCCESS | |
249 | * !0 FAILURE | |
250 | */ | |
251 | static int edac_sysfs_memctrl_setup(void) | |
252 | { | |
253 | int err=0; | |
254 | ||
255 | debugf1("MC: " __FILE__ ": %s()\n", __func__); | |
256 | ||
257 | /* create the /sys/devices/system/edac directory */ | |
258 | err = sysdev_class_register(&edac_class); | |
259 | if (!err) { | |
260 | /* Init the MC's kobject */ | |
261 | memset(&edac_memctrl_kobj, 0, sizeof (edac_memctrl_kobj)); | |
262 | kobject_init(&edac_memctrl_kobj); | |
263 | ||
264 | edac_memctrl_kobj.parent = &edac_class.kset.kobj; | |
265 | edac_memctrl_kobj.ktype = &ktype_memctrl; | |
266 | ||
267 | /* generate sysfs "..../edac/mc" */ | |
268 | err = kobject_set_name(&edac_memctrl_kobj,"mc"); | |
269 | if (!err) { | |
270 | /* FIXME: maybe new sysdev_create_subdir() */ | |
271 | err = kobject_register(&edac_memctrl_kobj); | |
272 | if (err) { | |
273 | debugf1("Failed to register '.../edac/mc'\n"); | |
274 | } else { | |
275 | debugf1("Registered '.../edac/mc' kobject\n"); | |
276 | } | |
277 | } | |
278 | } else { | |
279 | debugf1(KERN_WARNING "__FILE__ %s() error=%d\n", __func__,err); | |
280 | } | |
281 | ||
282 | return err; | |
283 | } | |
284 | ||
285 | /* | |
286 | * MC teardown: | |
287 | * the '..../edac/mc' kobject followed by '..../edac' itself | |
288 | */ | |
289 | static void edac_sysfs_memctrl_teardown(void) | |
290 | { | |
291 | debugf0("MC: " __FILE__ ": %s()\n", __func__); | |
292 | ||
293 | /* Unregister the MC's kobject */ | |
294 | kobject_unregister(&edac_memctrl_kobj); | |
295 | ||
296 | /* release the master edac mc kobject */ | |
297 | kobject_put(&edac_memctrl_kobj); | |
298 | ||
299 | /* Unregister the 'edac' object */ | |
300 | sysdev_class_unregister(&edac_class); | |
301 | } | |
302 | ||
303 | /* | |
304 | * /sys/devices/system/edac/pci; | |
305 | * data structures and methods | |
306 | */ | |
307 | ||
308 | struct list_control { | |
309 | struct edac_pci_device_list *list; | |
310 | int *count; | |
311 | }; | |
312 | ||
313 | /* Output the list as: vendor_id:device:id<,vendor_id:device_id> */ | |
314 | static ssize_t edac_pci_list_string_show(void *ptr, char *buffer) | |
315 | { | |
316 | struct list_control *listctl; | |
317 | struct edac_pci_device_list *list; | |
318 | char *p = buffer; | |
319 | int len=0; | |
320 | int i; | |
321 | ||
322 | listctl = ptr; | |
323 | list = listctl->list; | |
324 | ||
325 | for (i = 0; i < *(listctl->count); i++, list++ ) { | |
326 | if (len > 0) | |
327 | len += snprintf(p + len, (PAGE_SIZE-len), ","); | |
328 | ||
329 | len += snprintf(p + len, | |
330 | (PAGE_SIZE-len), | |
331 | "%x:%x", | |
332 | list->vendor,list->device); | |
333 | } | |
334 | ||
335 | len += snprintf(p + len,(PAGE_SIZE-len), "\n"); | |
336 | ||
337 | return (ssize_t) len; | |
338 | } | |
339 | ||
340 | /** | |
341 | * | |
342 | * Scan string from **s to **e looking for one 'vendor:device' tuple | |
343 | * where each field is a hex value | |
344 | * | |
345 | * return 0 if an entry is NOT found | |
346 | * return 1 if an entry is found | |
347 | * fill in *vendor_id and *device_id with values found | |
348 | * | |
349 | * In both cases, make sure *s has been moved forward toward *e | |
350 | */ | |
351 | static int parse_one_device(const char **s,const char **e, | |
352 | unsigned int *vendor_id, unsigned int *device_id) | |
353 | { | |
354 | const char *runner, *p; | |
355 | ||
356 | /* if null byte, we are done */ | |
357 | if (!**s) { | |
358 | (*s)++; /* keep *s moving */ | |
359 | return 0; | |
360 | } | |
361 | ||
362 | /* skip over newlines & whitespace */ | |
363 | if ((**s == '\n') || isspace(**s)) { | |
364 | (*s)++; | |
365 | return 0; | |
366 | } | |
367 | ||
368 | if (!isxdigit(**s)) { | |
369 | (*s)++; | |
370 | return 0; | |
371 | } | |
372 | ||
373 | /* parse vendor_id */ | |
374 | runner = *s; | |
375 | while (runner < *e) { | |
376 | /* scan for vendor:device delimiter */ | |
377 | if (*runner == ':') { | |
378 | *vendor_id = simple_strtol((char*) *s, (char**) &p, 16); | |
379 | runner = p + 1; | |
380 | break; | |
381 | } | |
382 | runner++; | |
383 | } | |
384 | ||
385 | if (!isxdigit(*runner)) { | |
386 | *s = ++runner; | |
387 | return 0; | |
388 | } | |
389 | ||
390 | /* parse device_id */ | |
391 | if (runner < *e) { | |
392 | *device_id = simple_strtol((char*)runner, (char**)&p, 16); | |
393 | runner = p; | |
394 | } | |
395 | ||
396 | *s = runner; | |
397 | ||
398 | return 1; | |
399 | } | |
400 | ||
401 | static ssize_t edac_pci_list_string_store(void *ptr, const char *buffer, | |
402 | size_t count) | |
403 | { | |
404 | struct list_control *listctl; | |
405 | struct edac_pci_device_list *list; | |
406 | unsigned int vendor_id, device_id; | |
407 | const char *s, *e; | |
408 | int *index; | |
409 | ||
410 | s = (char*)buffer; | |
411 | e = s + count; | |
412 | ||
413 | listctl = ptr; | |
414 | list = listctl->list; | |
415 | index = listctl->count; | |
416 | ||
417 | *index = 0; | |
418 | while (*index < MAX_LISTED_PCI_DEVICES) { | |
419 | ||
420 | if (parse_one_device(&s,&e,&vendor_id,&device_id)) { | |
421 | list[ *index ].vendor = vendor_id; | |
422 | list[ *index ].device = device_id; | |
423 | (*index)++; | |
424 | } | |
425 | ||
426 | /* check for all data consume */ | |
427 | if (s >= e) | |
428 | break; | |
429 | } | |
430 | ||
431 | return count; | |
432 | } | |
433 | ||
434 | static ssize_t edac_pci_int_show(void *ptr, char *buffer) | |
435 | { | |
436 | int *value = ptr; | |
437 | return sprintf(buffer,"%d\n",*value); | |
438 | } | |
439 | ||
440 | static ssize_t edac_pci_int_store(void *ptr, const char *buffer, size_t count) | |
441 | { | |
442 | int *value = ptr; | |
443 | ||
444 | if (isdigit(*buffer)) | |
445 | *value = simple_strtoul(buffer,NULL,0); | |
446 | ||
447 | return count; | |
448 | } | |
449 | ||
450 | struct edac_pci_dev_attribute { | |
451 | struct attribute attr; | |
452 | void *value; | |
453 | ssize_t (*show)(void *,char *); | |
454 | ssize_t (*store)(void *, const char *,size_t); | |
455 | }; | |
456 | ||
457 | /* Set of show/store abstract level functions for PCI Parity object */ | |
458 | static ssize_t edac_pci_dev_show(struct kobject *kobj, struct attribute *attr, | |
459 | char *buffer) | |
460 | { | |
461 | struct edac_pci_dev_attribute *edac_pci_dev; | |
462 | edac_pci_dev= (struct edac_pci_dev_attribute*)attr; | |
463 | ||
464 | if (edac_pci_dev->show) | |
465 | return edac_pci_dev->show(edac_pci_dev->value, buffer); | |
466 | return -EIO; | |
467 | } | |
468 | ||
469 | static ssize_t edac_pci_dev_store(struct kobject *kobj, struct attribute *attr, | |
470 | const char *buffer, size_t count) | |
471 | { | |
472 | struct edac_pci_dev_attribute *edac_pci_dev; | |
473 | edac_pci_dev= (struct edac_pci_dev_attribute*)attr; | |
474 | ||
475 | if (edac_pci_dev->show) | |
476 | return edac_pci_dev->store(edac_pci_dev->value, buffer, count); | |
477 | return -EIO; | |
478 | } | |
479 | ||
480 | static struct sysfs_ops edac_pci_sysfs_ops = { | |
481 | .show = edac_pci_dev_show, | |
482 | .store = edac_pci_dev_store | |
483 | }; | |
484 | ||
485 | ||
486 | #define EDAC_PCI_ATTR(_name,_mode,_show,_store) \ | |
487 | struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ | |
488 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
489 | .value = &_name, \ | |
490 | .show = _show, \ | |
491 | .store = _store, \ | |
492 | }; | |
493 | ||
494 | #define EDAC_PCI_STRING_ATTR(_name,_data,_mode,_show,_store) \ | |
495 | struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ | |
496 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
497 | .value = _data, \ | |
498 | .show = _show, \ | |
499 | .store = _store, \ | |
500 | }; | |
501 | ||
502 | static struct list_control pci_whitelist_control = { | |
503 | .list = pci_whitelist, | |
504 | .count = &pci_whitelist_count | |
505 | }; | |
506 | ||
507 | static struct list_control pci_blacklist_control = { | |
508 | .list = pci_blacklist, | |
509 | .count = &pci_blacklist_count | |
510 | }; | |
511 | ||
512 | /* whitelist attribute */ | |
513 | EDAC_PCI_STRING_ATTR(pci_parity_whitelist, | |
514 | &pci_whitelist_control, | |
515 | S_IRUGO|S_IWUSR, | |
516 | edac_pci_list_string_show, | |
517 | edac_pci_list_string_store); | |
518 | ||
519 | EDAC_PCI_STRING_ATTR(pci_parity_blacklist, | |
520 | &pci_blacklist_control, | |
521 | S_IRUGO|S_IWUSR, | |
522 | edac_pci_list_string_show, | |
523 | edac_pci_list_string_store); | |
524 | ||
525 | /* PCI Parity control files */ | |
526 | EDAC_PCI_ATTR(check_pci_parity,S_IRUGO|S_IWUSR,edac_pci_int_show,edac_pci_int_store); | |
527 | EDAC_PCI_ATTR(panic_on_pci_parity,S_IRUGO|S_IWUSR,edac_pci_int_show,edac_pci_int_store); | |
528 | EDAC_PCI_ATTR(pci_parity_count,S_IRUGO,edac_pci_int_show,NULL); | |
529 | ||
530 | /* Base Attributes of the memory ECC object */ | |
531 | static struct edac_pci_dev_attribute *edac_pci_attr[] = { | |
532 | &edac_pci_attr_check_pci_parity, | |
533 | &edac_pci_attr_panic_on_pci_parity, | |
534 | &edac_pci_attr_pci_parity_count, | |
535 | &edac_pci_attr_pci_parity_whitelist, | |
536 | &edac_pci_attr_pci_parity_blacklist, | |
537 | NULL, | |
538 | }; | |
539 | ||
540 | /* No memory to release */ | |
541 | static void edac_pci_release(struct kobject *kobj) | |
542 | { | |
543 | debugf1("EDAC PCI: " __FILE__ ": %s()\n", __func__); | |
544 | } | |
545 | ||
546 | static struct kobj_type ktype_edac_pci = { | |
547 | .release = edac_pci_release, | |
548 | .sysfs_ops = &edac_pci_sysfs_ops, | |
549 | .default_attrs = (struct attribute **) edac_pci_attr, | |
550 | }; | |
551 | ||
552 | /** | |
553 | * edac_sysfs_pci_setup() | |
554 | * | |
555 | */ | |
556 | static int edac_sysfs_pci_setup(void) | |
557 | { | |
558 | int err; | |
559 | ||
560 | debugf1("MC: " __FILE__ ": %s()\n", __func__); | |
561 | ||
562 | memset(&edac_pci_kobj, 0, sizeof(edac_pci_kobj)); | |
563 | ||
564 | kobject_init(&edac_pci_kobj); | |
565 | edac_pci_kobj.parent = &edac_class.kset.kobj; | |
566 | edac_pci_kobj.ktype = &ktype_edac_pci; | |
567 | ||
568 | err = kobject_set_name(&edac_pci_kobj, "pci"); | |
569 | if (!err) { | |
570 | /* Instanstiate the csrow object */ | |
571 | /* FIXME: maybe new sysdev_create_subdir() */ | |
572 | err = kobject_register(&edac_pci_kobj); | |
573 | if (err) | |
574 | debugf1("Failed to register '.../edac/pci'\n"); | |
575 | else | |
576 | debugf1("Registered '.../edac/pci' kobject\n"); | |
577 | } | |
578 | return err; | |
579 | } | |
580 | ||
581 | ||
582 | static void edac_sysfs_pci_teardown(void) | |
583 | { | |
584 | debugf0("MC: " __FILE__ ": %s()\n", __func__); | |
585 | ||
586 | kobject_unregister(&edac_pci_kobj); | |
587 | kobject_put(&edac_pci_kobj); | |
588 | } | |
589 | ||
590 | /* EDAC sysfs CSROW data structures and methods */ | |
591 | ||
592 | /* Set of more detailed csrow<id> attribute show/store functions */ | |
593 | static ssize_t csrow_ch0_dimm_label_show(struct csrow_info *csrow, char *data) | |
594 | { | |
595 | ssize_t size = 0; | |
596 | ||
597 | if (csrow->nr_channels > 0) { | |
598 | size = snprintf(data, EDAC_MC_LABEL_LEN,"%s\n", | |
599 | csrow->channels[0].label); | |
600 | } | |
601 | return size; | |
602 | } | |
603 | ||
604 | static ssize_t csrow_ch1_dimm_label_show(struct csrow_info *csrow, char *data) | |
605 | { | |
606 | ssize_t size = 0; | |
607 | ||
608 | if (csrow->nr_channels > 0) { | |
609 | size = snprintf(data, EDAC_MC_LABEL_LEN, "%s\n", | |
610 | csrow->channels[1].label); | |
611 | } | |
612 | return size; | |
613 | } | |
614 | ||
615 | static ssize_t csrow_ch0_dimm_label_store(struct csrow_info *csrow, | |
616 | const char *data, size_t size) | |
617 | { | |
618 | ssize_t max_size = 0; | |
619 | ||
620 | if (csrow->nr_channels > 0) { | |
621 | max_size = min((ssize_t)size,(ssize_t)EDAC_MC_LABEL_LEN-1); | |
622 | strncpy(csrow->channels[0].label, data, max_size); | |
623 | csrow->channels[0].label[max_size] = '\0'; | |
624 | } | |
625 | return size; | |
626 | } | |
627 | ||
628 | static ssize_t csrow_ch1_dimm_label_store(struct csrow_info *csrow, | |
629 | const char *data, size_t size) | |
630 | { | |
631 | ssize_t max_size = 0; | |
632 | ||
633 | if (csrow->nr_channels > 1) { | |
634 | max_size = min((ssize_t)size,(ssize_t)EDAC_MC_LABEL_LEN-1); | |
635 | strncpy(csrow->channels[1].label, data, max_size); | |
636 | csrow->channels[1].label[max_size] = '\0'; | |
637 | } | |
638 | return max_size; | |
639 | } | |
640 | ||
641 | static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data) | |
642 | { | |
643 | return sprintf(data,"%u\n", csrow->ue_count); | |
644 | } | |
645 | ||
646 | static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data) | |
647 | { | |
648 | return sprintf(data,"%u\n", csrow->ce_count); | |
649 | } | |
650 | ||
651 | static ssize_t csrow_ch0_ce_count_show(struct csrow_info *csrow, char *data) | |
652 | { | |
653 | ssize_t size = 0; | |
654 | ||
655 | if (csrow->nr_channels > 0) { | |
656 | size = sprintf(data,"%u\n", csrow->channels[0].ce_count); | |
657 | } | |
658 | return size; | |
659 | } | |
660 | ||
661 | static ssize_t csrow_ch1_ce_count_show(struct csrow_info *csrow, char *data) | |
662 | { | |
663 | ssize_t size = 0; | |
664 | ||
665 | if (csrow->nr_channels > 1) { | |
666 | size = sprintf(data,"%u\n", csrow->channels[1].ce_count); | |
667 | } | |
668 | return size; | |
669 | } | |
670 | ||
671 | static ssize_t csrow_size_show(struct csrow_info *csrow, char *data) | |
672 | { | |
673 | return sprintf(data,"%u\n", PAGES_TO_MiB(csrow->nr_pages)); | |
674 | } | |
675 | ||
676 | static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data) | |
677 | { | |
678 | return sprintf(data,"%s\n", mem_types[csrow->mtype]); | |
679 | } | |
680 | ||
681 | static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data) | |
682 | { | |
683 | return sprintf(data,"%s\n", dev_types[csrow->dtype]); | |
684 | } | |
685 | ||
686 | static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data) | |
687 | { | |
688 | return sprintf(data,"%s\n", edac_caps[csrow->edac_mode]); | |
689 | } | |
690 | ||
691 | struct csrowdev_attribute { | |
692 | struct attribute attr; | |
693 | ssize_t (*show)(struct csrow_info *,char *); | |
694 | ssize_t (*store)(struct csrow_info *, const char *,size_t); | |
695 | }; | |
696 | ||
697 | #define to_csrow(k) container_of(k, struct csrow_info, kobj) | |
698 | #define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr) | |
699 | ||
700 | /* Set of show/store higher level functions for csrow objects */ | |
701 | static ssize_t csrowdev_show(struct kobject *kobj, struct attribute *attr, | |
702 | char *buffer) | |
703 | { | |
704 | struct csrow_info *csrow = to_csrow(kobj); | |
705 | struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr); | |
706 | ||
707 | if (csrowdev_attr->show) | |
708 | return csrowdev_attr->show(csrow, buffer); | |
709 | return -EIO; | |
710 | } | |
711 | ||
712 | static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr, | |
713 | const char *buffer, size_t count) | |
714 | { | |
715 | struct csrow_info *csrow = to_csrow(kobj); | |
716 | struct csrowdev_attribute * csrowdev_attr = to_csrowdev_attr(attr); | |
717 | ||
718 | if (csrowdev_attr->store) | |
719 | return csrowdev_attr->store(csrow, buffer, count); | |
720 | return -EIO; | |
721 | } | |
722 | ||
723 | static struct sysfs_ops csrowfs_ops = { | |
724 | .show = csrowdev_show, | |
725 | .store = csrowdev_store | |
726 | }; | |
727 | ||
728 | #define CSROWDEV_ATTR(_name,_mode,_show,_store) \ | |
729 | struct csrowdev_attribute attr_##_name = { \ | |
730 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
731 | .show = _show, \ | |
732 | .store = _store, \ | |
733 | }; | |
734 | ||
735 | /* cwrow<id>/attribute files */ | |
736 | CSROWDEV_ATTR(size_mb,S_IRUGO,csrow_size_show,NULL); | |
737 | CSROWDEV_ATTR(dev_type,S_IRUGO,csrow_dev_type_show,NULL); | |
738 | CSROWDEV_ATTR(mem_type,S_IRUGO,csrow_mem_type_show,NULL); | |
739 | CSROWDEV_ATTR(edac_mode,S_IRUGO,csrow_edac_mode_show,NULL); | |
740 | CSROWDEV_ATTR(ue_count,S_IRUGO,csrow_ue_count_show,NULL); | |
741 | CSROWDEV_ATTR(ce_count,S_IRUGO,csrow_ce_count_show,NULL); | |
742 | CSROWDEV_ATTR(ch0_ce_count,S_IRUGO,csrow_ch0_ce_count_show,NULL); | |
743 | CSROWDEV_ATTR(ch1_ce_count,S_IRUGO,csrow_ch1_ce_count_show,NULL); | |
744 | ||
745 | /* control/attribute files */ | |
746 | CSROWDEV_ATTR(ch0_dimm_label,S_IRUGO|S_IWUSR, | |
747 | csrow_ch0_dimm_label_show, | |
748 | csrow_ch0_dimm_label_store); | |
749 | CSROWDEV_ATTR(ch1_dimm_label,S_IRUGO|S_IWUSR, | |
750 | csrow_ch1_dimm_label_show, | |
751 | csrow_ch1_dimm_label_store); | |
752 | ||
753 | ||
754 | /* Attributes of the CSROW<id> object */ | |
755 | static struct csrowdev_attribute *csrow_attr[] = { | |
756 | &attr_dev_type, | |
757 | &attr_mem_type, | |
758 | &attr_edac_mode, | |
759 | &attr_size_mb, | |
760 | &attr_ue_count, | |
761 | &attr_ce_count, | |
762 | &attr_ch0_ce_count, | |
763 | &attr_ch1_ce_count, | |
764 | &attr_ch0_dimm_label, | |
765 | &attr_ch1_dimm_label, | |
766 | NULL, | |
767 | }; | |
768 | ||
769 | ||
770 | /* No memory to release */ | |
771 | static void edac_csrow_instance_release(struct kobject *kobj) | |
772 | { | |
773 | debugf1("EDAC MC: " __FILE__ ": %s()\n", __func__); | |
774 | } | |
775 | ||
776 | static struct kobj_type ktype_csrow = { | |
777 | .release = edac_csrow_instance_release, | |
778 | .sysfs_ops = &csrowfs_ops, | |
779 | .default_attrs = (struct attribute **) csrow_attr, | |
780 | }; | |
781 | ||
782 | /* Create a CSROW object under specifed edac_mc_device */ | |
783 | static int edac_create_csrow_object(struct kobject *edac_mci_kobj, | |
784 | struct csrow_info *csrow, int index ) | |
785 | { | |
786 | int err = 0; | |
787 | ||
788 | debugf0("MC: " __FILE__ ": %s()\n", __func__); | |
789 | ||
790 | memset(&csrow->kobj, 0, sizeof(csrow->kobj)); | |
791 | ||
792 | /* generate ..../edac/mc/mc<id>/csrow<index> */ | |
793 | ||
794 | kobject_init(&csrow->kobj); | |
795 | csrow->kobj.parent = edac_mci_kobj; | |
796 | csrow->kobj.ktype = &ktype_csrow; | |
797 | ||
798 | /* name this instance of csrow<id> */ | |
799 | err = kobject_set_name(&csrow->kobj,"csrow%d",index); | |
800 | if (!err) { | |
801 | /* Instanstiate the csrow object */ | |
802 | err = kobject_register(&csrow->kobj); | |
803 | if (err) | |
804 | debugf0("Failed to register CSROW%d\n",index); | |
805 | else | |
806 | debugf0("Registered CSROW%d\n",index); | |
807 | } | |
808 | ||
809 | return err; | |
810 | } | |
811 | ||
812 | /* sysfs data structures and methods for the MCI kobjects */ | |
813 | ||
814 | static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci, | |
815 | const char *data, size_t count ) | |
816 | { | |
817 | int row, chan; | |
818 | ||
819 | mci->ue_noinfo_count = 0; | |
820 | mci->ce_noinfo_count = 0; | |
821 | mci->ue_count = 0; | |
822 | mci->ce_count = 0; | |
823 | for (row = 0; row < mci->nr_csrows; row++) { | |
824 | struct csrow_info *ri = &mci->csrows[row]; | |
825 | ||
826 | ri->ue_count = 0; | |
827 | ri->ce_count = 0; | |
828 | for (chan = 0; chan < ri->nr_channels; chan++) | |
829 | ri->channels[chan].ce_count = 0; | |
830 | } | |
831 | mci->start_time = jiffies; | |
832 | ||
833 | return count; | |
834 | } | |
835 | ||
836 | static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data) | |
837 | { | |
838 | return sprintf(data,"%d\n", mci->ue_count); | |
839 | } | |
840 | ||
841 | static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data) | |
842 | { | |
843 | return sprintf(data,"%d\n", mci->ce_count); | |
844 | } | |
845 | ||
846 | static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data) | |
847 | { | |
848 | return sprintf(data,"%d\n", mci->ce_noinfo_count); | |
849 | } | |
850 | ||
851 | static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data) | |
852 | { | |
853 | return sprintf(data,"%d\n", mci->ue_noinfo_count); | |
854 | } | |
855 | ||
856 | static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data) | |
857 | { | |
858 | return sprintf(data,"%ld\n", (jiffies - mci->start_time) / HZ); | |
859 | } | |
860 | ||
861 | static ssize_t mci_mod_name_show(struct mem_ctl_info *mci, char *data) | |
862 | { | |
863 | return sprintf(data,"%s %s\n", mci->mod_name, mci->mod_ver); | |
864 | } | |
865 | ||
866 | static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data) | |
867 | { | |
868 | return sprintf(data,"%s\n", mci->ctl_name); | |
869 | } | |
870 | ||
871 | static int mci_output_edac_cap(char *buf, unsigned long edac_cap) | |
872 | { | |
873 | char *p = buf; | |
874 | int bit_idx; | |
875 | ||
876 | for (bit_idx = 0; bit_idx < 8 * sizeof(edac_cap); bit_idx++) { | |
877 | if ((edac_cap >> bit_idx) & 0x1) | |
878 | p += sprintf(p, "%s ", edac_caps[bit_idx]); | |
879 | } | |
880 | ||
881 | return p - buf; | |
882 | } | |
883 | ||
884 | static ssize_t mci_edac_capability_show(struct mem_ctl_info *mci, char *data) | |
885 | { | |
886 | char *p = data; | |
887 | ||
888 | p += mci_output_edac_cap(p,mci->edac_ctl_cap); | |
889 | p += sprintf(p, "\n"); | |
890 | ||
891 | return p - data; | |
892 | } | |
893 | ||
894 | static ssize_t mci_edac_current_capability_show(struct mem_ctl_info *mci, | |
895 | char *data) | |
896 | { | |
897 | char *p = data; | |
898 | ||
899 | p += mci_output_edac_cap(p,mci->edac_cap); | |
900 | p += sprintf(p, "\n"); | |
901 | ||
902 | return p - data; | |
903 | } | |
904 | ||
905 | static int mci_output_mtype_cap(char *buf, unsigned long mtype_cap) | |
906 | { | |
907 | char *p = buf; | |
908 | int bit_idx; | |
909 | ||
910 | for (bit_idx = 0; bit_idx < 8 * sizeof(mtype_cap); bit_idx++) { | |
911 | if ((mtype_cap >> bit_idx) & 0x1) | |
912 | p += sprintf(p, "%s ", mem_types[bit_idx]); | |
913 | } | |
914 | ||
915 | return p - buf; | |
916 | } | |
917 | ||
918 | static ssize_t mci_supported_mem_type_show(struct mem_ctl_info *mci, char *data) | |
919 | { | |
920 | char *p = data; | |
921 | ||
922 | p += mci_output_mtype_cap(p,mci->mtype_cap); | |
923 | p += sprintf(p, "\n"); | |
924 | ||
925 | return p - data; | |
926 | } | |
927 | ||
928 | static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data) | |
929 | { | |
930 | int total_pages, csrow_idx; | |
931 | ||
932 | for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows; | |
933 | csrow_idx++) { | |
934 | struct csrow_info *csrow = &mci->csrows[csrow_idx]; | |
935 | ||
936 | if (!csrow->nr_pages) | |
937 | continue; | |
938 | total_pages += csrow->nr_pages; | |
939 | } | |
940 | ||
941 | return sprintf(data,"%u\n", PAGES_TO_MiB(total_pages)); | |
942 | } | |
943 | ||
944 | struct mcidev_attribute { | |
945 | struct attribute attr; | |
946 | ssize_t (*show)(struct mem_ctl_info *,char *); | |
947 | ssize_t (*store)(struct mem_ctl_info *, const char *,size_t); | |
948 | }; | |
949 | ||
950 | #define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj) | |
951 | #define to_mcidev_attr(a) container_of(a, struct mcidev_attribute, attr) | |
952 | ||
953 | static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr, | |
954 | char *buffer) | |
955 | { | |
956 | struct mem_ctl_info *mem_ctl_info = to_mci(kobj); | |
957 | struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr); | |
958 | ||
959 | if (mcidev_attr->show) | |
960 | return mcidev_attr->show(mem_ctl_info, buffer); | |
961 | return -EIO; | |
962 | } | |
963 | ||
964 | static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr, | |
965 | const char *buffer, size_t count) | |
966 | { | |
967 | struct mem_ctl_info *mem_ctl_info = to_mci(kobj); | |
968 | struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr); | |
969 | ||
970 | if (mcidev_attr->store) | |
971 | return mcidev_attr->store(mem_ctl_info, buffer, count); | |
972 | return -EIO; | |
973 | } | |
974 | ||
975 | static struct sysfs_ops mci_ops = { | |
976 | .show = mcidev_show, | |
977 | .store = mcidev_store | |
978 | }; | |
979 | ||
980 | #define MCIDEV_ATTR(_name,_mode,_show,_store) \ | |
981 | struct mcidev_attribute mci_attr_##_name = { \ | |
982 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
983 | .show = _show, \ | |
984 | .store = _store, \ | |
985 | }; | |
986 | ||
987 | /* Control file */ | |
988 | MCIDEV_ATTR(reset_counters,S_IWUSR,NULL,mci_reset_counters_store); | |
989 | ||
990 | /* Attribute files */ | |
991 | MCIDEV_ATTR(mc_name,S_IRUGO,mci_ctl_name_show,NULL); | |
992 | MCIDEV_ATTR(module_name,S_IRUGO,mci_mod_name_show,NULL); | |
993 | MCIDEV_ATTR(edac_capability,S_IRUGO,mci_edac_capability_show,NULL); | |
994 | MCIDEV_ATTR(size_mb,S_IRUGO,mci_size_mb_show,NULL); | |
995 | MCIDEV_ATTR(seconds_since_reset,S_IRUGO,mci_seconds_show,NULL); | |
996 | MCIDEV_ATTR(ue_noinfo_count,S_IRUGO,mci_ue_noinfo_show,NULL); | |
997 | MCIDEV_ATTR(ce_noinfo_count,S_IRUGO,mci_ce_noinfo_show,NULL); | |
998 | MCIDEV_ATTR(ue_count,S_IRUGO,mci_ue_count_show,NULL); | |
999 | MCIDEV_ATTR(ce_count,S_IRUGO,mci_ce_count_show,NULL); | |
1000 | MCIDEV_ATTR(edac_current_capability,S_IRUGO, | |
1001 | mci_edac_current_capability_show,NULL); | |
1002 | MCIDEV_ATTR(supported_mem_type,S_IRUGO, | |
1003 | mci_supported_mem_type_show,NULL); | |
1004 | ||
1005 | ||
1006 | static struct mcidev_attribute *mci_attr[] = { | |
1007 | &mci_attr_reset_counters, | |
1008 | &mci_attr_module_name, | |
1009 | &mci_attr_mc_name, | |
1010 | &mci_attr_edac_capability, | |
1011 | &mci_attr_edac_current_capability, | |
1012 | &mci_attr_supported_mem_type, | |
1013 | &mci_attr_size_mb, | |
1014 | &mci_attr_seconds_since_reset, | |
1015 | &mci_attr_ue_noinfo_count, | |
1016 | &mci_attr_ce_noinfo_count, | |
1017 | &mci_attr_ue_count, | |
1018 | &mci_attr_ce_count, | |
1019 | NULL | |
1020 | }; | |
1021 | ||
1022 | ||
1023 | /* | |
1024 | * Release of a MC controlling instance | |
1025 | */ | |
1026 | static void edac_mci_instance_release(struct kobject *kobj) | |
1027 | { | |
1028 | struct mem_ctl_info *mci; | |
1029 | mci = container_of(kobj,struct mem_ctl_info,edac_mci_kobj); | |
1030 | ||
1031 | debugf0("MC: " __FILE__ ": %s() idx=%d calling kfree\n", | |
1032 | __func__, mci->mc_idx); | |
1033 | ||
1034 | kfree(mci); | |
1035 | } | |
1036 | ||
1037 | static struct kobj_type ktype_mci = { | |
1038 | .release = edac_mci_instance_release, | |
1039 | .sysfs_ops = &mci_ops, | |
1040 | .default_attrs = (struct attribute **) mci_attr, | |
1041 | }; | |
1042 | ||
1043 | #define EDAC_DEVICE_SYMLINK "device" | |
1044 | ||
1045 | /* | |
1046 | * Create a new Memory Controller kobject instance, | |
1047 | * mc<id> under the 'mc' directory | |
1048 | * | |
1049 | * Return: | |
1050 | * 0 Success | |
1051 | * !0 Failure | |
1052 | */ | |
1053 | static int edac_create_sysfs_mci_device(struct mem_ctl_info *mci) | |
1054 | { | |
1055 | int i; | |
1056 | int err; | |
1057 | struct csrow_info *csrow; | |
1058 | struct kobject *edac_mci_kobj=&mci->edac_mci_kobj; | |
1059 | ||
1060 | debugf0("MC: " __FILE__ ": %s() idx=%d\n", __func__, mci->mc_idx); | |
1061 | ||
1062 | memset(edac_mci_kobj, 0, sizeof(*edac_mci_kobj)); | |
1063 | kobject_init(edac_mci_kobj); | |
1064 | ||
1065 | /* set the name of the mc<id> object */ | |
1066 | err = kobject_set_name(edac_mci_kobj,"mc%d",mci->mc_idx); | |
1067 | if (err) | |
1068 | return err; | |
1069 | ||
1070 | /* link to our parent the '..../edac/mc' object */ | |
1071 | edac_mci_kobj->parent = &edac_memctrl_kobj; | |
1072 | edac_mci_kobj->ktype = &ktype_mci; | |
1073 | ||
1074 | /* register the mc<id> kobject */ | |
1075 | err = kobject_register(edac_mci_kobj); | |
1076 | if (err) | |
1077 | return err; | |
1078 | ||
1079 | /* create a symlink for the device */ | |
1080 | err = sysfs_create_link(edac_mci_kobj, &mci->pdev->dev.kobj, | |
1081 | EDAC_DEVICE_SYMLINK); | |
1082 | if (err) { | |
1083 | kobject_unregister(edac_mci_kobj); | |
1084 | return err; | |
1085 | } | |
1086 | ||
1087 | /* Make directories for each CSROW object | |
1088 | * under the mc<id> kobject | |
1089 | */ | |
1090 | for (i = 0; i < mci->nr_csrows; i++) { | |
1091 | ||
1092 | csrow = &mci->csrows[i]; | |
1093 | ||
1094 | /* Only expose populated CSROWs */ | |
1095 | if (csrow->nr_pages > 0) { | |
1096 | err = edac_create_csrow_object(edac_mci_kobj,csrow,i); | |
1097 | if (err) | |
1098 | goto fail; | |
1099 | } | |
1100 | } | |
1101 | ||
1102 | /* Mark this MCI instance as having sysfs entries */ | |
1103 | mci->sysfs_active = MCI_SYSFS_ACTIVE; | |
1104 | ||
1105 | return 0; | |
1106 | ||
1107 | ||
1108 | /* CSROW error: backout what has already been registered, */ | |
1109 | fail: | |
1110 | for ( i--; i >= 0; i--) { | |
1111 | if (csrow->nr_pages > 0) { | |
1112 | kobject_unregister(&mci->csrows[i].kobj); | |
1113 | kobject_put(&mci->csrows[i].kobj); | |
1114 | } | |
1115 | } | |
1116 | ||
1117 | kobject_unregister(edac_mci_kobj); | |
1118 | kobject_put(edac_mci_kobj); | |
1119 | ||
1120 | return err; | |
1121 | } | |
1122 | ||
1123 | /* | |
1124 | * remove a Memory Controller instance | |
1125 | */ | |
1126 | static void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci) | |
1127 | { | |
1128 | int i; | |
1129 | ||
1130 | debugf0("MC: " __FILE__ ": %s()\n", __func__); | |
1131 | ||
1132 | /* remove all csrow kobjects */ | |
1133 | for (i = 0; i < mci->nr_csrows; i++) { | |
1134 | if (mci->csrows[i].nr_pages > 0) { | |
1135 | kobject_unregister(&mci->csrows[i].kobj); | |
1136 | kobject_put(&mci->csrows[i].kobj); | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK); | |
1141 | ||
1142 | kobject_unregister(&mci->edac_mci_kobj); | |
1143 | kobject_put(&mci->edac_mci_kobj); | |
1144 | } | |
1145 | ||
1146 | /* END OF sysfs data and methods */ | |
1147 | ||
1148 | #ifdef CONFIG_EDAC_DEBUG | |
1149 | ||
1150 | EXPORT_SYMBOL(edac_mc_dump_channel); | |
1151 | ||
1152 | void edac_mc_dump_channel(struct channel_info *chan) | |
1153 | { | |
1154 | debugf4("\tchannel = %p\n", chan); | |
1155 | debugf4("\tchannel->chan_idx = %d\n", chan->chan_idx); | |
1156 | debugf4("\tchannel->ce_count = %d\n", chan->ce_count); | |
1157 | debugf4("\tchannel->label = '%s'\n", chan->label); | |
1158 | debugf4("\tchannel->csrow = %p\n\n", chan->csrow); | |
1159 | } | |
1160 | ||
1161 | ||
1162 | EXPORT_SYMBOL(edac_mc_dump_csrow); | |
1163 | ||
1164 | void edac_mc_dump_csrow(struct csrow_info *csrow) | |
1165 | { | |
1166 | debugf4("\tcsrow = %p\n", csrow); | |
1167 | debugf4("\tcsrow->csrow_idx = %d\n", csrow->csrow_idx); | |
1168 | debugf4("\tcsrow->first_page = 0x%lx\n", | |
1169 | csrow->first_page); | |
1170 | debugf4("\tcsrow->last_page = 0x%lx\n", csrow->last_page); | |
1171 | debugf4("\tcsrow->page_mask = 0x%lx\n", csrow->page_mask); | |
1172 | debugf4("\tcsrow->nr_pages = 0x%x\n", csrow->nr_pages); | |
1173 | debugf4("\tcsrow->nr_channels = %d\n", | |
1174 | csrow->nr_channels); | |
1175 | debugf4("\tcsrow->channels = %p\n", csrow->channels); | |
1176 | debugf4("\tcsrow->mci = %p\n\n", csrow->mci); | |
1177 | } | |
1178 | ||
1179 | ||
1180 | EXPORT_SYMBOL(edac_mc_dump_mci); | |
1181 | ||
1182 | void edac_mc_dump_mci(struct mem_ctl_info *mci) | |
1183 | { | |
1184 | debugf3("\tmci = %p\n", mci); | |
1185 | debugf3("\tmci->mtype_cap = %lx\n", mci->mtype_cap); | |
1186 | debugf3("\tmci->edac_ctl_cap = %lx\n", mci->edac_ctl_cap); | |
1187 | debugf3("\tmci->edac_cap = %lx\n", mci->edac_cap); | |
1188 | debugf4("\tmci->edac_check = %p\n", mci->edac_check); | |
1189 | debugf3("\tmci->nr_csrows = %d, csrows = %p\n", | |
1190 | mci->nr_csrows, mci->csrows); | |
1191 | debugf3("\tpdev = %p\n", mci->pdev); | |
1192 | debugf3("\tmod_name:ctl_name = %s:%s\n", | |
1193 | mci->mod_name, mci->ctl_name); | |
1194 | debugf3("\tpvt_info = %p\n\n", mci->pvt_info); | |
1195 | } | |
1196 | ||
1197 | ||
1198 | #endif /* CONFIG_EDAC_DEBUG */ | |
1199 | ||
1200 | /* 'ptr' points to a possibly unaligned item X such that sizeof(X) is 'size'. | |
1201 | * Adjust 'ptr' so that its alignment is at least as stringent as what the | |
1202 | * compiler would provide for X and return the aligned result. | |
1203 | * | |
1204 | * If 'size' is a constant, the compiler will optimize this whole function | |
1205 | * down to either a no-op or the addition of a constant to the value of 'ptr'. | |
1206 | */ | |
1207 | static inline char * align_ptr (void *ptr, unsigned size) | |
1208 | { | |
1209 | unsigned align, r; | |
1210 | ||
1211 | /* Here we assume that the alignment of a "long long" is the most | |
1212 | * stringent alignment that the compiler will ever provide by default. | |
1213 | * As far as I know, this is a reasonable assumption. | |
1214 | */ | |
1215 | if (size > sizeof(long)) | |
1216 | align = sizeof(long long); | |
1217 | else if (size > sizeof(int)) | |
1218 | align = sizeof(long); | |
1219 | else if (size > sizeof(short)) | |
1220 | align = sizeof(int); | |
1221 | else if (size > sizeof(char)) | |
1222 | align = sizeof(short); | |
1223 | else | |
1224 | return (char *) ptr; | |
1225 | ||
1226 | r = size % align; | |
1227 | ||
1228 | if (r == 0) | |
1229 | return (char *) ptr; | |
1230 | ||
1231 | return (char *) (((unsigned long) ptr) + align - r); | |
1232 | } | |
1233 | ||
1234 | ||
1235 | EXPORT_SYMBOL(edac_mc_alloc); | |
1236 | ||
1237 | /** | |
1238 | * edac_mc_alloc: Allocate a struct mem_ctl_info structure | |
1239 | * @size_pvt: size of private storage needed | |
1240 | * @nr_csrows: Number of CWROWS needed for this MC | |
1241 | * @nr_chans: Number of channels for the MC | |
1242 | * | |
1243 | * Everything is kmalloc'ed as one big chunk - more efficient. | |
1244 | * Only can be used if all structures have the same lifetime - otherwise | |
1245 | * you have to allocate and initialize your own structures. | |
1246 | * | |
1247 | * Use edac_mc_free() to free mc structures allocated by this function. | |
1248 | * | |
1249 | * Returns: | |
1250 | * NULL allocation failed | |
1251 | * struct mem_ctl_info pointer | |
1252 | */ | |
1253 | struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows, | |
1254 | unsigned nr_chans) | |
1255 | { | |
1256 | struct mem_ctl_info *mci; | |
1257 | struct csrow_info *csi, *csrow; | |
1258 | struct channel_info *chi, *chp, *chan; | |
1259 | void *pvt; | |
1260 | unsigned size; | |
1261 | int row, chn; | |
1262 | ||
1263 | /* Figure out the offsets of the various items from the start of an mc | |
1264 | * structure. We want the alignment of each item to be at least as | |
1265 | * stringent as what the compiler would provide if we could simply | |
1266 | * hardcode everything into a single struct. | |
1267 | */ | |
1268 | mci = (struct mem_ctl_info *) 0; | |
1269 | csi = (struct csrow_info *)align_ptr(&mci[1], sizeof(*csi)); | |
1270 | chi = (struct channel_info *) | |
1271 | align_ptr(&csi[nr_csrows], sizeof(*chi)); | |
1272 | pvt = align_ptr(&chi[nr_chans * nr_csrows], sz_pvt); | |
1273 | size = ((unsigned long) pvt) + sz_pvt; | |
1274 | ||
1275 | if ((mci = kmalloc(size, GFP_KERNEL)) == NULL) | |
1276 | return NULL; | |
1277 | ||
1278 | /* Adjust pointers so they point within the memory we just allocated | |
1279 | * rather than an imaginary chunk of memory located at address 0. | |
1280 | */ | |
1281 | csi = (struct csrow_info *) (((char *) mci) + ((unsigned long) csi)); | |
1282 | chi = (struct channel_info *) (((char *) mci) + ((unsigned long) chi)); | |
1283 | pvt = sz_pvt ? (((char *) mci) + ((unsigned long) pvt)) : NULL; | |
1284 | ||
1285 | memset(mci, 0, size); /* clear all fields */ | |
1286 | ||
1287 | mci->csrows = csi; | |
1288 | mci->pvt_info = pvt; | |
1289 | mci->nr_csrows = nr_csrows; | |
1290 | ||
1291 | for (row = 0; row < nr_csrows; row++) { | |
1292 | csrow = &csi[row]; | |
1293 | csrow->csrow_idx = row; | |
1294 | csrow->mci = mci; | |
1295 | csrow->nr_channels = nr_chans; | |
1296 | chp = &chi[row * nr_chans]; | |
1297 | csrow->channels = chp; | |
1298 | ||
1299 | for (chn = 0; chn < nr_chans; chn++) { | |
1300 | chan = &chp[chn]; | |
1301 | chan->chan_idx = chn; | |
1302 | chan->csrow = csrow; | |
1303 | } | |
1304 | } | |
1305 | ||
1306 | return mci; | |
1307 | } | |
1308 | ||
1309 | ||
1310 | EXPORT_SYMBOL(edac_mc_free); | |
1311 | ||
1312 | /** | |
1313 | * edac_mc_free: Free a previously allocated 'mci' structure | |
1314 | * @mci: pointer to a struct mem_ctl_info structure | |
1315 | * | |
1316 | * Free up a previously allocated mci structure | |
1317 | * A MCI structure can be in 2 states after being allocated | |
1318 | * by edac_mc_alloc(). | |
1319 | * 1) Allocated in a MC driver's probe, but not yet committed | |
1320 | * 2) Allocated and committed, by a call to edac_mc_add_mc() | |
1321 | * edac_mc_add_mc() is the function that adds the sysfs entries | |
1322 | * thus, this free function must determine which state the 'mci' | |
1323 | * structure is in, then either free it directly or | |
1324 | * perform kobject cleanup by calling edac_remove_sysfs_mci_device(). | |
1325 | * | |
1326 | * VOID Return | |
1327 | */ | |
1328 | void edac_mc_free(struct mem_ctl_info *mci) | |
1329 | { | |
1330 | /* only if sysfs entries for this mci instance exist | |
1331 | * do we remove them and defer the actual kfree via | |
1332 | * the kobject 'release()' callback. | |
1333 | * | |
1334 | * Otherwise, do a straight kfree now. | |
1335 | */ | |
1336 | if (mci->sysfs_active == MCI_SYSFS_ACTIVE) | |
1337 | edac_remove_sysfs_mci_device(mci); | |
1338 | else | |
1339 | kfree(mci); | |
1340 | } | |
1341 | ||
1342 | ||
1343 | ||
1344 | EXPORT_SYMBOL(edac_mc_find_mci_by_pdev); | |
1345 | ||
1346 | struct mem_ctl_info *edac_mc_find_mci_by_pdev(struct pci_dev *pdev) | |
1347 | { | |
1348 | struct mem_ctl_info *mci; | |
1349 | struct list_head *item; | |
1350 | ||
1351 | debugf3("MC: " __FILE__ ": %s()\n", __func__); | |
1352 | ||
1353 | list_for_each(item, &mc_devices) { | |
1354 | mci = list_entry(item, struct mem_ctl_info, link); | |
1355 | ||
1356 | if (mci->pdev == pdev) | |
1357 | return mci; | |
1358 | } | |
1359 | ||
1360 | return NULL; | |
1361 | } | |
1362 | ||
1363 | static int add_mc_to_global_list (struct mem_ctl_info *mci) | |
1364 | { | |
1365 | struct list_head *item, *insert_before; | |
1366 | struct mem_ctl_info *p; | |
1367 | int i; | |
1368 | ||
1369 | if (list_empty(&mc_devices)) { | |
1370 | mci->mc_idx = 0; | |
1371 | insert_before = &mc_devices; | |
1372 | } else { | |
1373 | if (edac_mc_find_mci_by_pdev(mci->pdev)) { | |
1374 | printk(KERN_WARNING | |
1375 | "EDAC MC: %s (%s) %s %s already assigned %d\n", | |
1376 | mci->pdev->dev.bus_id, pci_name(mci->pdev), | |
1377 | mci->mod_name, mci->ctl_name, mci->mc_idx); | |
1378 | return 1; | |
1379 | } | |
1380 | ||
1381 | insert_before = NULL; | |
1382 | i = 0; | |
1383 | ||
1384 | list_for_each(item, &mc_devices) { | |
1385 | p = list_entry(item, struct mem_ctl_info, link); | |
1386 | ||
1387 | if (p->mc_idx != i) { | |
1388 | insert_before = item; | |
1389 | break; | |
1390 | } | |
1391 | ||
1392 | i++; | |
1393 | } | |
1394 | ||
1395 | mci->mc_idx = i; | |
1396 | ||
1397 | if (insert_before == NULL) | |
1398 | insert_before = &mc_devices; | |
1399 | } | |
1400 | ||
1401 | list_add_tail_rcu(&mci->link, insert_before); | |
1402 | return 0; | |
1403 | } | |
1404 | ||
1405 | ||
1406 | ||
1407 | EXPORT_SYMBOL(edac_mc_add_mc); | |
1408 | ||
1409 | /** | |
1410 | * edac_mc_add_mc: Insert the 'mci' structure into the mci global list | |
1411 | * @mci: pointer to the mci structure to be added to the list | |
1412 | * | |
1413 | * Return: | |
1414 | * 0 Success | |
1415 | * !0 Failure | |
1416 | */ | |
1417 | ||
1418 | /* FIXME - should a warning be printed if no error detection? correction? */ | |
1419 | int edac_mc_add_mc(struct mem_ctl_info *mci) | |
1420 | { | |
1421 | int rc = 1; | |
1422 | ||
1423 | debugf0("MC: " __FILE__ ": %s()\n", __func__); | |
1424 | #ifdef CONFIG_EDAC_DEBUG | |
1425 | if (edac_debug_level >= 3) | |
1426 | edac_mc_dump_mci(mci); | |
1427 | if (edac_debug_level >= 4) { | |
1428 | int i; | |
1429 | ||
1430 | for (i = 0; i < mci->nr_csrows; i++) { | |
1431 | int j; | |
1432 | edac_mc_dump_csrow(&mci->csrows[i]); | |
1433 | for (j = 0; j < mci->csrows[i].nr_channels; j++) | |
1434 | edac_mc_dump_channel(&mci->csrows[i]. | |
1435 | channels[j]); | |
1436 | } | |
1437 | } | |
1438 | #endif | |
1439 | down(&mem_ctls_mutex); | |
1440 | ||
1441 | if (add_mc_to_global_list(mci)) | |
1442 | goto finish; | |
1443 | ||
1444 | /* set load time so that error rate can be tracked */ | |
1445 | mci->start_time = jiffies; | |
1446 | ||
1447 | if (edac_create_sysfs_mci_device(mci)) { | |
1448 | printk(KERN_WARNING | |
1449 | "EDAC MC%d: failed to create sysfs device\n", | |
1450 | mci->mc_idx); | |
1451 | /* FIXME - should there be an error code and unwind? */ | |
1452 | goto finish; | |
1453 | } | |
1454 | ||
1455 | /* Report action taken */ | |
1456 | printk(KERN_INFO | |
1457 | "EDAC MC%d: Giving out device to %s %s: PCI %s\n", | |
1458 | mci->mc_idx, mci->mod_name, mci->ctl_name, | |
1459 | pci_name(mci->pdev)); | |
1460 | ||
1461 | ||
1462 | rc = 0; | |
1463 | ||
1464 | finish: | |
1465 | up(&mem_ctls_mutex); | |
1466 | return rc; | |
1467 | } | |
1468 | ||
1469 | ||
1470 | ||
1471 | static void complete_mc_list_del (struct rcu_head *head) | |
1472 | { | |
1473 | struct mem_ctl_info *mci; | |
1474 | ||
1475 | mci = container_of(head, struct mem_ctl_info, rcu); | |
1476 | INIT_LIST_HEAD(&mci->link); | |
1477 | complete(&mci->complete); | |
1478 | } | |
1479 | ||
1480 | static void del_mc_from_global_list (struct mem_ctl_info *mci) | |
1481 | { | |
1482 | list_del_rcu(&mci->link); | |
1483 | init_completion(&mci->complete); | |
1484 | call_rcu(&mci->rcu, complete_mc_list_del); | |
1485 | wait_for_completion(&mci->complete); | |
1486 | } | |
1487 | ||
1488 | EXPORT_SYMBOL(edac_mc_del_mc); | |
1489 | ||
1490 | /** | |
1491 | * edac_mc_del_mc: Remove the specified mci structure from global list | |
1492 | * @mci: Pointer to struct mem_ctl_info structure | |
1493 | * | |
1494 | * Returns: | |
1495 | * 0 Success | |
1496 | * 1 Failure | |
1497 | */ | |
1498 | int edac_mc_del_mc(struct mem_ctl_info *mci) | |
1499 | { | |
1500 | int rc = 1; | |
1501 | ||
1502 | debugf0("MC%d: " __FILE__ ": %s()\n", mci->mc_idx, __func__); | |
1503 | down(&mem_ctls_mutex); | |
1504 | del_mc_from_global_list(mci); | |
1505 | printk(KERN_INFO | |
1506 | "EDAC MC%d: Removed device %d for %s %s: PCI %s\n", | |
1507 | mci->mc_idx, mci->mc_idx, mci->mod_name, mci->ctl_name, | |
1508 | pci_name(mci->pdev)); | |
1509 | rc = 0; | |
1510 | up(&mem_ctls_mutex); | |
1511 | ||
1512 | return rc; | |
1513 | } | |
1514 | ||
1515 | ||
1516 | EXPORT_SYMBOL(edac_mc_scrub_block); | |
1517 | ||
1518 | void edac_mc_scrub_block(unsigned long page, unsigned long offset, | |
1519 | u32 size) | |
1520 | { | |
1521 | struct page *pg; | |
1522 | void *virt_addr; | |
1523 | unsigned long flags = 0; | |
1524 | ||
1525 | debugf3("MC: " __FILE__ ": %s()\n", __func__); | |
1526 | ||
1527 | /* ECC error page was not in our memory. Ignore it. */ | |
1528 | if(!pfn_valid(page)) | |
1529 | return; | |
1530 | ||
1531 | /* Find the actual page structure then map it and fix */ | |
1532 | pg = pfn_to_page(page); | |
1533 | ||
1534 | if (PageHighMem(pg)) | |
1535 | local_irq_save(flags); | |
1536 | ||
1537 | virt_addr = kmap_atomic(pg, KM_BOUNCE_READ); | |
1538 | ||
1539 | /* Perform architecture specific atomic scrub operation */ | |
1540 | atomic_scrub(virt_addr + offset, size); | |
1541 | ||
1542 | /* Unmap and complete */ | |
1543 | kunmap_atomic(virt_addr, KM_BOUNCE_READ); | |
1544 | ||
1545 | if (PageHighMem(pg)) | |
1546 | local_irq_restore(flags); | |
1547 | } | |
1548 | ||
1549 | ||
1550 | /* FIXME - should return -1 */ | |
1551 | EXPORT_SYMBOL(edac_mc_find_csrow_by_page); | |
1552 | ||
1553 | int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, | |
1554 | unsigned long page) | |
1555 | { | |
1556 | struct csrow_info *csrows = mci->csrows; | |
1557 | int row, i; | |
1558 | ||
1559 | debugf1("MC%d: " __FILE__ ": %s(): 0x%lx\n", mci->mc_idx, __func__, | |
1560 | page); | |
1561 | row = -1; | |
1562 | ||
1563 | for (i = 0; i < mci->nr_csrows; i++) { | |
1564 | struct csrow_info *csrow = &csrows[i]; | |
1565 | ||
1566 | if (csrow->nr_pages == 0) | |
1567 | continue; | |
1568 | ||
1569 | debugf3("MC%d: " __FILE__ | |
1570 | ": %s(): first(0x%lx) page(0x%lx)" | |
1571 | " last(0x%lx) mask(0x%lx)\n", mci->mc_idx, | |
1572 | __func__, csrow->first_page, page, | |
1573 | csrow->last_page, csrow->page_mask); | |
1574 | ||
1575 | if ((page >= csrow->first_page) && | |
1576 | (page <= csrow->last_page) && | |
1577 | ((page & csrow->page_mask) == | |
1578 | (csrow->first_page & csrow->page_mask))) { | |
1579 | row = i; | |
1580 | break; | |
1581 | } | |
1582 | } | |
1583 | ||
1584 | if (row == -1) | |
1585 | printk(KERN_ERR | |
1586 | "EDAC MC%d: could not look up page error address %lx\n", | |
1587 | mci->mc_idx, (unsigned long) page); | |
1588 | ||
1589 | return row; | |
1590 | } | |
1591 | ||
1592 | ||
1593 | EXPORT_SYMBOL(edac_mc_handle_ce); | |
1594 | ||
1595 | /* FIXME - setable log (warning/emerg) levels */ | |
1596 | /* FIXME - integrate with evlog: http://evlog.sourceforge.net/ */ | |
1597 | void edac_mc_handle_ce(struct mem_ctl_info *mci, | |
1598 | unsigned long page_frame_number, | |
1599 | unsigned long offset_in_page, | |
1600 | unsigned long syndrome, int row, int channel, | |
1601 | const char *msg) | |
1602 | { | |
1603 | unsigned long remapped_page; | |
1604 | ||
1605 | debugf3("MC%d: " __FILE__ ": %s()\n", mci->mc_idx, __func__); | |
1606 | ||
1607 | /* FIXME - maybe make panic on INTERNAL ERROR an option */ | |
1608 | if (row >= mci->nr_csrows || row < 0) { | |
1609 | /* something is wrong */ | |
1610 | printk(KERN_ERR | |
1611 | "EDAC MC%d: INTERNAL ERROR: row out of range (%d >= %d)\n", | |
1612 | mci->mc_idx, row, mci->nr_csrows); | |
1613 | edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); | |
1614 | return; | |
1615 | } | |
1616 | if (channel >= mci->csrows[row].nr_channels || channel < 0) { | |
1617 | /* something is wrong */ | |
1618 | printk(KERN_ERR | |
1619 | "EDAC MC%d: INTERNAL ERROR: channel out of range " | |
1620 | "(%d >= %d)\n", | |
1621 | mci->mc_idx, channel, mci->csrows[row].nr_channels); | |
1622 | edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); | |
1623 | return; | |
1624 | } | |
1625 | ||
1626 | if (log_ce) | |
1627 | /* FIXME - put in DIMM location */ | |
1628 | printk(KERN_WARNING | |
1629 | "EDAC MC%d: CE page 0x%lx, offset 0x%lx," | |
1630 | " grain %d, syndrome 0x%lx, row %d, channel %d," | |
1631 | " label \"%s\": %s\n", mci->mc_idx, | |
1632 | page_frame_number, offset_in_page, | |
1633 | mci->csrows[row].grain, syndrome, row, channel, | |
1634 | mci->csrows[row].channels[channel].label, msg); | |
1635 | ||
1636 | mci->ce_count++; | |
1637 | mci->csrows[row].ce_count++; | |
1638 | mci->csrows[row].channels[channel].ce_count++; | |
1639 | ||
1640 | if (mci->scrub_mode & SCRUB_SW_SRC) { | |
1641 | /* | |
1642 | * Some MC's can remap memory so that it is still available | |
1643 | * at a different address when PCI devices map into memory. | |
1644 | * MC's that can't do this lose the memory where PCI devices | |
1645 | * are mapped. This mapping is MC dependant and so we call | |
1646 | * back into the MC driver for it to map the MC page to | |
1647 | * a physical (CPU) page which can then be mapped to a virtual | |
1648 | * page - which can then be scrubbed. | |
1649 | */ | |
1650 | remapped_page = mci->ctl_page_to_phys ? | |
1651 | mci->ctl_page_to_phys(mci, page_frame_number) : | |
1652 | page_frame_number; | |
1653 | ||
1654 | edac_mc_scrub_block(remapped_page, offset_in_page, | |
1655 | mci->csrows[row].grain); | |
1656 | } | |
1657 | } | |
1658 | ||
1659 | ||
1660 | EXPORT_SYMBOL(edac_mc_handle_ce_no_info); | |
1661 | ||
1662 | void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, | |
1663 | const char *msg) | |
1664 | { | |
1665 | if (log_ce) | |
1666 | printk(KERN_WARNING | |
1667 | "EDAC MC%d: CE - no information available: %s\n", | |
1668 | mci->mc_idx, msg); | |
1669 | mci->ce_noinfo_count++; | |
1670 | mci->ce_count++; | |
1671 | } | |
1672 | ||
1673 | ||
1674 | EXPORT_SYMBOL(edac_mc_handle_ue); | |
1675 | ||
1676 | void edac_mc_handle_ue(struct mem_ctl_info *mci, | |
1677 | unsigned long page_frame_number, | |
1678 | unsigned long offset_in_page, int row, | |
1679 | const char *msg) | |
1680 | { | |
1681 | int len = EDAC_MC_LABEL_LEN * 4; | |
1682 | char labels[len + 1]; | |
1683 | char *pos = labels; | |
1684 | int chan; | |
1685 | int chars; | |
1686 | ||
1687 | debugf3("MC%d: " __FILE__ ": %s()\n", mci->mc_idx, __func__); | |
1688 | ||
1689 | /* FIXME - maybe make panic on INTERNAL ERROR an option */ | |
1690 | if (row >= mci->nr_csrows || row < 0) { | |
1691 | /* something is wrong */ | |
1692 | printk(KERN_ERR | |
1693 | "EDAC MC%d: INTERNAL ERROR: row out of range (%d >= %d)\n", | |
1694 | mci->mc_idx, row, mci->nr_csrows); | |
1695 | edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); | |
1696 | return; | |
1697 | } | |
1698 | ||
1699 | chars = snprintf(pos, len + 1, "%s", | |
1700 | mci->csrows[row].channels[0].label); | |
1701 | len -= chars; | |
1702 | pos += chars; | |
1703 | for (chan = 1; (chan < mci->csrows[row].nr_channels) && (len > 0); | |
1704 | chan++) { | |
1705 | chars = snprintf(pos, len + 1, ":%s", | |
1706 | mci->csrows[row].channels[chan].label); | |
1707 | len -= chars; | |
1708 | pos += chars; | |
1709 | } | |
1710 | ||
1711 | if (log_ue) | |
1712 | printk(KERN_EMERG | |
1713 | "EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, row %d," | |
1714 | " labels \"%s\": %s\n", mci->mc_idx, | |
1715 | page_frame_number, offset_in_page, | |
1716 | mci->csrows[row].grain, row, labels, msg); | |
1717 | ||
1718 | if (panic_on_ue) | |
1719 | panic | |
1720 | ("EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, row %d," | |
1721 | " labels \"%s\": %s\n", mci->mc_idx, | |
1722 | page_frame_number, offset_in_page, | |
1723 | mci->csrows[row].grain, row, labels, msg); | |
1724 | ||
1725 | mci->ue_count++; | |
1726 | mci->csrows[row].ue_count++; | |
1727 | } | |
1728 | ||
1729 | ||
1730 | EXPORT_SYMBOL(edac_mc_handle_ue_no_info); | |
1731 | ||
1732 | void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, | |
1733 | const char *msg) | |
1734 | { | |
1735 | if (panic_on_ue) | |
1736 | panic("EDAC MC%d: Uncorrected Error", mci->mc_idx); | |
1737 | ||
1738 | if (log_ue) | |
1739 | printk(KERN_WARNING | |
1740 | "EDAC MC%d: UE - no information available: %s\n", | |
1741 | mci->mc_idx, msg); | |
1742 | mci->ue_noinfo_count++; | |
1743 | mci->ue_count++; | |
1744 | } | |
1745 | ||
1746 | ||
1747 | #ifdef CONFIG_PCI | |
1748 | ||
1749 | static u16 get_pci_parity_status(struct pci_dev *dev, int secondary) | |
1750 | { | |
1751 | int where; | |
1752 | u16 status; | |
1753 | ||
1754 | where = secondary ? PCI_SEC_STATUS : PCI_STATUS; | |
1755 | pci_read_config_word(dev, where, &status); | |
1756 | ||
1757 | /* If we get back 0xFFFF then we must suspect that the card has been pulled but | |
1758 | the Linux PCI layer has not yet finished cleaning up. We don't want to report | |
1759 | on such devices */ | |
1760 | ||
1761 | if (status == 0xFFFF) { | |
1762 | u32 sanity; | |
1763 | pci_read_config_dword(dev, 0, &sanity); | |
1764 | if (sanity == 0xFFFFFFFF) | |
1765 | return 0; | |
1766 | } | |
1767 | status &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR | | |
1768 | PCI_STATUS_PARITY; | |
1769 | ||
1770 | if (status) | |
1771 | /* reset only the bits we are interested in */ | |
1772 | pci_write_config_word(dev, where, status); | |
1773 | ||
1774 | return status; | |
1775 | } | |
1776 | ||
1777 | typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev); | |
1778 | ||
1779 | /* Clear any PCI parity errors logged by this device. */ | |
1780 | static void edac_pci_dev_parity_clear( struct pci_dev *dev ) | |
1781 | { | |
1782 | u8 header_type; | |
1783 | ||
1784 | get_pci_parity_status(dev, 0); | |
1785 | ||
1786 | /* read the device TYPE, looking for bridges */ | |
1787 | pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); | |
1788 | ||
1789 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) | |
1790 | get_pci_parity_status(dev, 1); | |
1791 | } | |
1792 | ||
1793 | /* | |
1794 | * PCI Parity polling | |
1795 | * | |
1796 | */ | |
1797 | static void edac_pci_dev_parity_test(struct pci_dev *dev) | |
1798 | { | |
1799 | u16 status; | |
1800 | u8 header_type; | |
1801 | ||
1802 | /* read the STATUS register on this device | |
1803 | */ | |
1804 | status = get_pci_parity_status(dev, 0); | |
1805 | ||
1806 | debugf2("PCI STATUS= 0x%04x %s\n", status, dev->dev.bus_id ); | |
1807 | ||
1808 | /* check the status reg for errors */ | |
1809 | if (status) { | |
1810 | if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) | |
1811 | printk(KERN_CRIT | |
1812 | "EDAC PCI- " | |
1813 | "Signaled System Error on %s\n", | |
1814 | pci_name (dev)); | |
1815 | ||
1816 | if (status & (PCI_STATUS_PARITY)) { | |
1817 | printk(KERN_CRIT | |
1818 | "EDAC PCI- " | |
1819 | "Master Data Parity Error on %s\n", | |
1820 | pci_name (dev)); | |
1821 | ||
1822 | atomic_inc(&pci_parity_count); | |
1823 | } | |
1824 | ||
1825 | if (status & (PCI_STATUS_DETECTED_PARITY)) { | |
1826 | printk(KERN_CRIT | |
1827 | "EDAC PCI- " | |
1828 | "Detected Parity Error on %s\n", | |
1829 | pci_name (dev)); | |
1830 | ||
1831 | atomic_inc(&pci_parity_count); | |
1832 | } | |
1833 | } | |
1834 | ||
1835 | /* read the device TYPE, looking for bridges */ | |
1836 | pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); | |
1837 | ||
1838 | debugf2("PCI HEADER TYPE= 0x%02x %s\n", header_type, dev->dev.bus_id ); | |
1839 | ||
1840 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { | |
1841 | /* On bridges, need to examine secondary status register */ | |
1842 | status = get_pci_parity_status(dev, 1); | |
1843 | ||
1844 | debugf2("PCI SEC_STATUS= 0x%04x %s\n", | |
1845 | status, dev->dev.bus_id ); | |
1846 | ||
1847 | /* check the secondary status reg for errors */ | |
1848 | if (status) { | |
1849 | if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) | |
1850 | printk(KERN_CRIT | |
1851 | "EDAC PCI-Bridge- " | |
1852 | "Signaled System Error on %s\n", | |
1853 | pci_name (dev)); | |
1854 | ||
1855 | if (status & (PCI_STATUS_PARITY)) { | |
1856 | printk(KERN_CRIT | |
1857 | "EDAC PCI-Bridge- " | |
1858 | "Master Data Parity Error on %s\n", | |
1859 | pci_name (dev)); | |
1860 | ||
1861 | atomic_inc(&pci_parity_count); | |
1862 | } | |
1863 | ||
1864 | if (status & (PCI_STATUS_DETECTED_PARITY)) { | |
1865 | printk(KERN_CRIT | |
1866 | "EDAC PCI-Bridge- " | |
1867 | "Detected Parity Error on %s\n", | |
1868 | pci_name (dev)); | |
1869 | ||
1870 | atomic_inc(&pci_parity_count); | |
1871 | } | |
1872 | } | |
1873 | } | |
1874 | } | |
1875 | ||
1876 | /* | |
1877 | * check_dev_on_list: Scan for a PCI device on a white/black list | |
1878 | * @list: an EDAC &edac_pci_device_list white/black list pointer | |
1879 | * @free_index: index of next free entry on the list | |
1880 | * @pci_dev: PCI Device pointer | |
1881 | * | |
1882 | * see if list contains the device. | |
1883 | * | |
1884 | * Returns: 0 not found | |
1885 | * 1 found on list | |
1886 | */ | |
1887 | static int check_dev_on_list(struct edac_pci_device_list *list, int free_index, | |
1888 | struct pci_dev *dev) | |
1889 | { | |
1890 | int i; | |
1891 | int rc = 0; /* Assume not found */ | |
1892 | unsigned short vendor=dev->vendor; | |
1893 | unsigned short device=dev->device; | |
1894 | ||
1895 | /* Scan the list, looking for a vendor/device match | |
1896 | */ | |
1897 | for (i = 0; i < free_index; i++, list++ ) { | |
1898 | if ( (list->vendor == vendor ) && | |
1899 | (list->device == device )) { | |
1900 | rc = 1; | |
1901 | break; | |
1902 | } | |
1903 | } | |
1904 | ||
1905 | return rc; | |
1906 | } | |
1907 | ||
1908 | /* | |
1909 | * pci_dev parity list iterator | |
1910 | * Scan the PCI device list for one iteration, looking for SERRORs | |
1911 | * Master Parity ERRORS or Parity ERRORs on primary or secondary devices | |
1912 | */ | |
1913 | static inline void edac_pci_dev_parity_iterator(pci_parity_check_fn_t fn) | |
1914 | { | |
1915 | struct pci_dev *dev=NULL; | |
1916 | ||
1917 | /* request for kernel access to the next PCI device, if any, | |
1918 | * and while we are looking at it have its reference count | |
1919 | * bumped until we are done with it | |
1920 | */ | |
1921 | while((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { | |
1922 | ||
1923 | /* if whitelist exists then it has priority, so only scan those | |
1924 | * devices on the whitelist | |
1925 | */ | |
1926 | if (pci_whitelist_count > 0 ) { | |
1927 | if (check_dev_on_list(pci_whitelist, | |
1928 | pci_whitelist_count, dev)) | |
1929 | fn(dev); | |
1930 | } else { | |
1931 | /* | |
1932 | * if no whitelist, then check if this devices is | |
1933 | * blacklisted | |
1934 | */ | |
1935 | if (!check_dev_on_list(pci_blacklist, | |
1936 | pci_blacklist_count, dev)) | |
1937 | fn(dev); | |
1938 | } | |
1939 | } | |
1940 | } | |
1941 | ||
1942 | static void do_pci_parity_check(void) | |
1943 | { | |
1944 | unsigned long flags; | |
1945 | int before_count; | |
1946 | ||
1947 | debugf3("MC: " __FILE__ ": %s()\n", __func__); | |
1948 | ||
1949 | if (!check_pci_parity) | |
1950 | return; | |
1951 | ||
1952 | before_count = atomic_read(&pci_parity_count); | |
1953 | ||
1954 | /* scan all PCI devices looking for a Parity Error on devices and | |
1955 | * bridges | |
1956 | */ | |
1957 | local_irq_save(flags); | |
1958 | edac_pci_dev_parity_iterator(edac_pci_dev_parity_test); | |
1959 | local_irq_restore(flags); | |
1960 | ||
1961 | /* Only if operator has selected panic on PCI Error */ | |
1962 | if (panic_on_pci_parity) { | |
1963 | /* If the count is different 'after' from 'before' */ | |
1964 | if (before_count != atomic_read(&pci_parity_count)) | |
1965 | panic("EDAC: PCI Parity Error"); | |
1966 | } | |
1967 | } | |
1968 | ||
1969 | ||
1970 | static inline void clear_pci_parity_errors(void) | |
1971 | { | |
1972 | /* Clear any PCI bus parity errors that devices initially have logged | |
1973 | * in their registers. | |
1974 | */ | |
1975 | edac_pci_dev_parity_iterator(edac_pci_dev_parity_clear); | |
1976 | } | |
1977 | ||
1978 | ||
1979 | #else /* CONFIG_PCI */ | |
1980 | ||
1981 | ||
1982 | static inline void do_pci_parity_check(void) | |
1983 | { | |
1984 | /* no-op */ | |
1985 | } | |
1986 | ||
1987 | ||
1988 | static inline void clear_pci_parity_errors(void) | |
1989 | { | |
1990 | /* no-op */ | |
1991 | } | |
1992 | ||
1993 | ||
1994 | #endif /* CONFIG_PCI */ | |
1995 | ||
1996 | /* | |
1997 | * Iterate over all MC instances and check for ECC, et al, errors | |
1998 | */ | |
1999 | static inline void check_mc_devices (void) | |
2000 | { | |
2001 | unsigned long flags; | |
2002 | struct list_head *item; | |
2003 | struct mem_ctl_info *mci; | |
2004 | ||
2005 | debugf3("MC: " __FILE__ ": %s()\n", __func__); | |
2006 | ||
2007 | /* during poll, have interrupts off */ | |
2008 | local_irq_save(flags); | |
2009 | ||
2010 | list_for_each(item, &mc_devices) { | |
2011 | mci = list_entry(item, struct mem_ctl_info, link); | |
2012 | ||
2013 | if (mci->edac_check != NULL) | |
2014 | mci->edac_check(mci); | |
2015 | } | |
2016 | ||
2017 | local_irq_restore(flags); | |
2018 | } | |
2019 | ||
2020 | ||
2021 | /* | |
2022 | * Check MC status every poll_msec. | |
2023 | * Check PCI status every poll_msec as well. | |
2024 | * | |
2025 | * This where the work gets done for edac. | |
2026 | * | |
2027 | * SMP safe, doesn't use NMI, and auto-rate-limits. | |
2028 | */ | |
2029 | static void do_edac_check(void) | |
2030 | { | |
2031 | ||
2032 | debugf3("MC: " __FILE__ ": %s()\n", __func__); | |
2033 | ||
2034 | check_mc_devices(); | |
2035 | ||
2036 | do_pci_parity_check(); | |
2037 | } | |
2038 | ||
2039 | ||
2040 | /* | |
2041 | * EDAC thread state information | |
2042 | */ | |
2043 | struct bs_thread_info | |
2044 | { | |
2045 | struct task_struct *task; | |
2046 | struct completion *event; | |
2047 | char *name; | |
2048 | void (*run)(void); | |
2049 | }; | |
2050 | ||
2051 | static struct bs_thread_info bs_thread; | |
2052 | ||
2053 | /* | |
2054 | * edac_kernel_thread | |
2055 | * This the kernel thread that processes edac operations | |
2056 | * in a normal thread environment | |
2057 | */ | |
2058 | static int edac_kernel_thread(void *arg) | |
2059 | { | |
2060 | struct bs_thread_info *thread = (struct bs_thread_info *) arg; | |
2061 | ||
2062 | /* detach thread */ | |
2063 | daemonize(thread->name); | |
2064 | ||
2065 | current->exit_signal = SIGCHLD; | |
2066 | allow_signal(SIGKILL); | |
2067 | thread->task = current; | |
2068 | ||
2069 | /* indicate to starting task we have started */ | |
2070 | complete(thread->event); | |
2071 | ||
2072 | /* loop forever, until we are told to stop */ | |
2073 | while(thread->run != NULL) { | |
2074 | void (*run)(void); | |
2075 | ||
2076 | /* call the function to check the memory controllers */ | |
2077 | run = thread->run; | |
2078 | if (run) | |
2079 | run(); | |
2080 | ||
2081 | if (signal_pending(current)) | |
2082 | flush_signals(current); | |
2083 | ||
2084 | /* ensure we are interruptable */ | |
2085 | set_current_state(TASK_INTERRUPTIBLE); | |
2086 | ||
2087 | /* goto sleep for the interval */ | |
2088 | schedule_timeout((HZ * poll_msec) / 1000); | |
2089 | try_to_freeze(); | |
2090 | } | |
2091 | ||
2092 | /* notify waiter that we are exiting */ | |
2093 | complete(thread->event); | |
2094 | ||
2095 | return 0; | |
2096 | } | |
2097 | ||
2098 | /* | |
2099 | * edac_mc_init | |
2100 | * module initialization entry point | |
2101 | */ | |
2102 | static int __init edac_mc_init(void) | |
2103 | { | |
2104 | int ret; | |
2105 | struct completion event; | |
2106 | ||
2107 | printk(KERN_INFO "MC: " __FILE__ " version " EDAC_MC_VERSION "\n"); | |
2108 | ||
2109 | /* | |
2110 | * Harvest and clear any boot/initialization PCI parity errors | |
2111 | * | |
2112 | * FIXME: This only clears errors logged by devices present at time of | |
2113 | * module initialization. We should also do an initial clear | |
2114 | * of each newly hotplugged device. | |
2115 | */ | |
2116 | clear_pci_parity_errors(); | |
2117 | ||
2118 | /* perform check for first time to harvest boot leftovers */ | |
2119 | do_edac_check(); | |
2120 | ||
2121 | /* Create the MC sysfs entires */ | |
2122 | if (edac_sysfs_memctrl_setup()) { | |
2123 | printk(KERN_ERR "EDAC MC: Error initializing sysfs code\n"); | |
2124 | return -ENODEV; | |
2125 | } | |
2126 | ||
2127 | /* Create the PCI parity sysfs entries */ | |
2128 | if (edac_sysfs_pci_setup()) { | |
2129 | edac_sysfs_memctrl_teardown(); | |
2130 | printk(KERN_ERR "EDAC PCI: Error initializing sysfs code\n"); | |
2131 | return -ENODEV; | |
2132 | } | |
2133 | ||
2134 | /* Create our kernel thread */ | |
2135 | init_completion(&event); | |
2136 | bs_thread.event = &event; | |
2137 | bs_thread.name = "kedac"; | |
2138 | bs_thread.run = do_edac_check; | |
2139 | ||
2140 | /* create our kernel thread */ | |
2141 | ret = kernel_thread(edac_kernel_thread, &bs_thread, CLONE_KERNEL); | |
2142 | if (ret < 0) { | |
2143 | /* remove the sysfs entries */ | |
2144 | edac_sysfs_memctrl_teardown(); | |
2145 | edac_sysfs_pci_teardown(); | |
2146 | return -ENOMEM; | |
2147 | } | |
2148 | ||
2149 | /* wait for our kernel theard ack that it is up and running */ | |
2150 | wait_for_completion(&event); | |
2151 | ||
2152 | return 0; | |
2153 | } | |
2154 | ||
2155 | ||
2156 | /* | |
2157 | * edac_mc_exit() | |
2158 | * module exit/termination functioni | |
2159 | */ | |
2160 | static void __exit edac_mc_exit(void) | |
2161 | { | |
2162 | struct completion event; | |
2163 | ||
2164 | debugf0("MC: " __FILE__ ": %s()\n", __func__); | |
2165 | ||
2166 | init_completion(&event); | |
2167 | bs_thread.event = &event; | |
2168 | ||
2169 | /* As soon as ->run is set to NULL, the task could disappear, | |
2170 | * so we need to hold tasklist_lock until we have sent the signal | |
2171 | */ | |
2172 | read_lock(&tasklist_lock); | |
2173 | bs_thread.run = NULL; | |
2174 | send_sig(SIGKILL, bs_thread.task, 1); | |
2175 | read_unlock(&tasklist_lock); | |
2176 | wait_for_completion(&event); | |
2177 | ||
2178 | /* tear down the sysfs device */ | |
2179 | edac_sysfs_memctrl_teardown(); | |
2180 | edac_sysfs_pci_teardown(); | |
2181 | } | |
2182 | ||
2183 | ||
2184 | ||
2185 | ||
2186 | module_init(edac_mc_init); | |
2187 | module_exit(edac_mc_exit); | |
2188 | ||
2189 | MODULE_LICENSE("GPL"); | |
2190 | MODULE_AUTHOR("Linux Networx (http://lnxi.com) Thayne Harbaugh et al\n" | |
2191 | "Based on.work by Dan Hollis et al"); | |
2192 | MODULE_DESCRIPTION("Core library routines for MC reporting"); | |
2193 | ||
2194 | module_param(panic_on_ue, int, 0644); | |
2195 | MODULE_PARM_DESC(panic_on_ue, "Panic on uncorrected error: 0=off 1=on"); | |
2196 | module_param(check_pci_parity, int, 0644); | |
2197 | MODULE_PARM_DESC(check_pci_parity, "Check for PCI bus parity errors: 0=off 1=on"); | |
2198 | module_param(panic_on_pci_parity, int, 0644); | |
2199 | MODULE_PARM_DESC(panic_on_pci_parity, "Panic on PCI Bus Parity error: 0=off 1=on"); | |
2200 | module_param(log_ue, int, 0644); | |
2201 | MODULE_PARM_DESC(log_ue, "Log uncorrectable error to console: 0=off 1=on"); | |
2202 | module_param(log_ce, int, 0644); | |
2203 | MODULE_PARM_DESC(log_ce, "Log correctable error to console: 0=off 1=on"); | |
2204 | module_param(poll_msec, int, 0644); | |
2205 | MODULE_PARM_DESC(poll_msec, "Polling period in milliseconds"); | |
2206 | #ifdef CONFIG_EDAC_DEBUG | |
2207 | module_param(edac_debug_level, int, 0644); | |
2208 | MODULE_PARM_DESC(edac_debug_level, "Debug level"); | |
2209 | #endif |