Commit | Line | Data |
---|---|---|
20bcb7a8 | 1 | /* |
7c9281d7 DT |
2 | * (C) 2005, 2006 Linux Networx (http://lnxi.com) |
3 | * This file may be distributed under the terms of the | |
4 | * GNU General Public License. | |
5 | * | |
6 | * Written Doug Thompson <norsk5@xmission.com> | |
7 | * | |
8 | */ | |
9 | #include <linux/module.h> | |
10 | #include <linux/sysdev.h> | |
11 | #include <linux/ctype.h> | |
12 | ||
20bcb7a8 | 13 | #include "edac_core.h" |
7c9281d7 DT |
14 | #include "edac_module.h" |
15 | ||
16 | ||
17 | #ifdef CONFIG_PCI | |
91b99041 DJ |
18 | |
19 | #define EDAC_PCI_SYMLINK "device" | |
20 | ||
21 | static int check_pci_errors = 0; /* default YES check PCI parity */ | |
4de78c68 DJ |
22 | static int edac_pci_panic_on_pe = 0; /* default no panic on PCI Parity */ |
23 | static int edac_pci_log_pe = 1; /* log PCI parity errors */ | |
24 | static int edac_pci_log_npe = 1; /* log PCI non-parity error errors */ | |
7c9281d7 | 25 | static atomic_t pci_parity_count = ATOMIC_INIT(0); |
91b99041 | 26 | static atomic_t pci_nonparity_count = ATOMIC_INIT(0); |
4de78c68 | 27 | static int edac_pci_poll_msec = 1000; |
7c9281d7 DT |
28 | |
29 | static struct kobject edac_pci_kobj; /* /sys/devices/system/edac/pci */ | |
30 | static struct completion edac_pci_kobj_complete; | |
91b99041 DJ |
31 | static atomic_t edac_pci_sysfs_refcount = ATOMIC_INIT(0); |
32 | ||
4de78c68 DJ |
33 | int edac_pci_get_check_errors(void) |
34 | { | |
35 | return check_pci_errors; | |
36 | } | |
37 | ||
38 | int edac_pci_get_log_pe(void) | |
39 | { | |
40 | return edac_pci_log_pe; | |
41 | } | |
42 | ||
43 | int edac_pci_get_log_npe(void) | |
44 | { | |
45 | return edac_pci_log_npe; | |
46 | } | |
47 | ||
48 | int edac_pci_get_panic_on_pe(void) | |
49 | { | |
50 | return edac_pci_panic_on_pe; | |
51 | } | |
52 | ||
53 | int edac_pci_get_poll_msec(void) | |
54 | { | |
55 | return edac_pci_poll_msec; | |
56 | } | |
57 | ||
91b99041 DJ |
58 | /**************************** EDAC PCI sysfs instance *******************/ |
59 | static ssize_t instance_pe_count_show(struct edac_pci_ctl_info *pci, char *data) | |
60 | { | |
61 | return sprintf(data,"%u\n", atomic_read(&pci->counters.pe_count)); | |
62 | } | |
63 | ||
64 | static ssize_t instance_npe_count_show(struct edac_pci_ctl_info *pci, | |
65 | char *data) | |
66 | { | |
67 | return sprintf(data,"%u\n", atomic_read(&pci->counters.npe_count)); | |
68 | } | |
69 | ||
70 | #define to_instance(k) container_of(k, struct edac_pci_ctl_info, kobj) | |
71 | #define to_instance_attr(a) container_of(a, struct instance_attribute, attr) | |
72 | ||
73 | /* DEVICE instance kobject release() function */ | |
74 | static void edac_pci_instance_release(struct kobject *kobj) | |
75 | { | |
76 | struct edac_pci_ctl_info *pci; | |
77 | ||
78 | debugf1("%s()\n", __func__); | |
79 | ||
80 | pci = to_instance(kobj); | |
81 | complete(&pci->kobj_complete); | |
82 | } | |
83 | ||
84 | /* instance specific attribute structure */ | |
85 | struct instance_attribute { | |
86 | struct attribute attr; | |
87 | ssize_t (*show)(struct edac_pci_ctl_info *, char *); | |
88 | ssize_t (*store)(struct edac_pci_ctl_info *, const char *, size_t); | |
89 | }; | |
90 | ||
91 | /* Function to 'show' fields from the edac_pci 'instance' structure */ | |
92 | static ssize_t edac_pci_instance_show(struct kobject *kobj, | |
93 | struct attribute *attr, | |
94 | char *buffer) | |
95 | { | |
96 | struct edac_pci_ctl_info *pci = to_instance(kobj); | |
97 | struct instance_attribute *instance_attr = to_instance_attr(attr); | |
98 | ||
99 | if (instance_attr->show) | |
100 | return instance_attr->show(pci, buffer); | |
101 | return -EIO; | |
102 | } | |
103 | ||
104 | ||
105 | /* Function to 'store' fields into the edac_pci 'instance' structure */ | |
106 | static ssize_t edac_pci_instance_store(struct kobject *kobj, | |
107 | struct attribute *attr, | |
108 | const char *buffer, size_t count) | |
109 | { | |
110 | struct edac_pci_ctl_info *pci = to_instance(kobj); | |
111 | struct instance_attribute *instance_attr = to_instance_attr(attr); | |
112 | ||
113 | if (instance_attr->store) | |
114 | return instance_attr->store(pci, buffer, count); | |
115 | return -EIO; | |
116 | } | |
117 | ||
118 | static struct sysfs_ops pci_instance_ops = { | |
119 | .show = edac_pci_instance_show, | |
120 | .store = edac_pci_instance_store | |
121 | }; | |
122 | ||
123 | #define INSTANCE_ATTR(_name, _mode, _show, _store) \ | |
124 | static struct instance_attribute attr_instance_##_name = { \ | |
125 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
126 | .show = _show, \ | |
127 | .store = _store, \ | |
128 | }; | |
129 | ||
130 | INSTANCE_ATTR(pe_count, S_IRUGO, instance_pe_count_show, NULL); | |
131 | INSTANCE_ATTR(npe_count, S_IRUGO, instance_npe_count_show, NULL); | |
132 | ||
133 | /* pci instance attributes */ | |
134 | static struct instance_attribute *pci_instance_attr[] = { | |
135 | &attr_instance_pe_count, | |
136 | &attr_instance_npe_count, | |
137 | NULL | |
138 | }; | |
7c9281d7 | 139 | |
91b99041 DJ |
140 | /* the ktype for pci instance */ |
141 | static struct kobj_type ktype_pci_instance = { | |
142 | .release = edac_pci_instance_release, | |
143 | .sysfs_ops = &pci_instance_ops, | |
144 | .default_attrs = (struct attribute **)pci_instance_attr, | |
145 | }; | |
146 | ||
147 | static int edac_pci_create_instance_kobj(struct edac_pci_ctl_info *pci, int idx) | |
148 | { | |
149 | int err; | |
150 | ||
151 | pci->kobj.parent = &edac_pci_kobj; | |
152 | pci->kobj.ktype = &ktype_pci_instance; | |
153 | ||
154 | err = kobject_set_name(&pci->kobj, "pci%d", idx); | |
155 | if (err) | |
156 | return err; | |
157 | ||
158 | err = kobject_register(&pci->kobj); | |
159 | if (err != 0) { | |
160 | debugf2("%s() failed to register instance pci%d\n", | |
161 | __func__, idx); | |
162 | return err; | |
163 | } | |
164 | ||
165 | debugf1("%s() Register instance 'pci%d' kobject\n", __func__, idx); | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
170 | static void | |
171 | edac_pci_delete_instance_kobj(struct edac_pci_ctl_info *pci, int idx) | |
172 | { | |
173 | init_completion(&pci->kobj_complete); | |
174 | kobject_unregister(&pci->kobj); | |
175 | wait_for_completion(&pci->kobj_complete); | |
176 | } | |
177 | ||
178 | /***************************** EDAC PCI sysfs root **********************/ | |
179 | #define to_edacpci(k) container_of(k, struct edac_pci_ctl_info, kobj) | |
180 | #define to_edacpci_attr(a) container_of(a, struct edac_pci_attr, attr) | |
7c9281d7 DT |
181 | |
182 | static ssize_t edac_pci_int_show(void *ptr, char *buffer) | |
183 | { | |
184 | int *value = ptr; | |
185 | return sprintf(buffer,"%d\n",*value); | |
186 | } | |
187 | ||
188 | static ssize_t edac_pci_int_store(void *ptr, const char *buffer, size_t count) | |
189 | { | |
190 | int *value = ptr; | |
191 | ||
192 | if (isdigit(*buffer)) | |
193 | *value = simple_strtoul(buffer,NULL,0); | |
194 | ||
195 | return count; | |
196 | } | |
197 | ||
198 | struct edac_pci_dev_attribute { | |
199 | struct attribute attr; | |
200 | void *value; | |
201 | ssize_t (*show)(void *,char *); | |
202 | ssize_t (*store)(void *, const char *,size_t); | |
203 | }; | |
204 | ||
205 | /* Set of show/store abstract level functions for PCI Parity object */ | |
206 | static ssize_t edac_pci_dev_show(struct kobject *kobj, struct attribute *attr, | |
207 | char *buffer) | |
208 | { | |
209 | struct edac_pci_dev_attribute *edac_pci_dev; | |
210 | edac_pci_dev= (struct edac_pci_dev_attribute*)attr; | |
211 | ||
212 | if (edac_pci_dev->show) | |
213 | return edac_pci_dev->show(edac_pci_dev->value, buffer); | |
214 | return -EIO; | |
215 | } | |
216 | ||
217 | static ssize_t edac_pci_dev_store(struct kobject *kobj, | |
218 | struct attribute *attr, const char *buffer, size_t count) | |
219 | { | |
220 | struct edac_pci_dev_attribute *edac_pci_dev; | |
221 | edac_pci_dev= (struct edac_pci_dev_attribute*)attr; | |
222 | ||
223 | if (edac_pci_dev->show) | |
224 | return edac_pci_dev->store(edac_pci_dev->value, buffer, count); | |
225 | return -EIO; | |
226 | } | |
227 | ||
228 | static struct sysfs_ops edac_pci_sysfs_ops = { | |
229 | .show = edac_pci_dev_show, | |
230 | .store = edac_pci_dev_store | |
231 | }; | |
232 | ||
233 | #define EDAC_PCI_ATTR(_name,_mode,_show,_store) \ | |
234 | static struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ | |
235 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
236 | .value = &_name, \ | |
237 | .show = _show, \ | |
238 | .store = _store, \ | |
239 | }; | |
240 | ||
241 | #define EDAC_PCI_STRING_ATTR(_name,_data,_mode,_show,_store) \ | |
242 | static struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ | |
243 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
244 | .value = _data, \ | |
245 | .show = _show, \ | |
246 | .store = _store, \ | |
247 | }; | |
248 | ||
249 | /* PCI Parity control files */ | |
91b99041 DJ |
250 | EDAC_PCI_ATTR(check_pci_errors, S_IRUGO|S_IWUSR, edac_pci_int_show, |
251 | edac_pci_int_store); | |
4de78c68 DJ |
252 | EDAC_PCI_ATTR(edac_pci_log_pe, S_IRUGO|S_IWUSR, edac_pci_int_show, |
253 | edac_pci_int_store); | |
254 | EDAC_PCI_ATTR(edac_pci_log_npe, S_IRUGO|S_IWUSR, edac_pci_int_show, | |
7c9281d7 | 255 | edac_pci_int_store); |
4de78c68 | 256 | EDAC_PCI_ATTR(edac_pci_panic_on_pe, S_IRUGO|S_IWUSR, edac_pci_int_show, |
7c9281d7 DT |
257 | edac_pci_int_store); |
258 | EDAC_PCI_ATTR(pci_parity_count, S_IRUGO, edac_pci_int_show, NULL); | |
91b99041 | 259 | EDAC_PCI_ATTR(pci_nonparity_count, S_IRUGO, edac_pci_int_show, NULL); |
7c9281d7 DT |
260 | |
261 | /* Base Attributes of the memory ECC object */ | |
262 | static struct edac_pci_dev_attribute *edac_pci_attr[] = { | |
91b99041 | 263 | &edac_pci_attr_check_pci_errors, |
4de78c68 DJ |
264 | &edac_pci_attr_edac_pci_log_pe, |
265 | &edac_pci_attr_edac_pci_log_npe, | |
266 | &edac_pci_attr_edac_pci_panic_on_pe, | |
7c9281d7 | 267 | &edac_pci_attr_pci_parity_count, |
91b99041 | 268 | &edac_pci_attr_pci_nonparity_count, |
7c9281d7 DT |
269 | NULL, |
270 | }; | |
271 | ||
272 | /* No memory to release */ | |
273 | static void edac_pci_release(struct kobject *kobj) | |
274 | { | |
91b99041 DJ |
275 | struct edac_pci_ctl_info *pci; |
276 | ||
277 | pci = to_edacpci(kobj); | |
278 | ||
7c9281d7 | 279 | debugf1("%s()\n", __func__); |
91b99041 | 280 | complete(&pci->kobj_complete); |
7c9281d7 DT |
281 | } |
282 | ||
283 | static struct kobj_type ktype_edac_pci = { | |
284 | .release = edac_pci_release, | |
285 | .sysfs_ops = &edac_pci_sysfs_ops, | |
286 | .default_attrs = (struct attribute **) edac_pci_attr, | |
287 | }; | |
288 | ||
289 | /** | |
290 | * edac_sysfs_pci_setup() | |
291 | * | |
292 | * setup the sysfs for EDAC PCI attributes | |
293 | * assumes edac_class has already been initialized | |
294 | */ | |
91b99041 | 295 | int edac_pci_register_main_kobj(void) |
7c9281d7 DT |
296 | { |
297 | int err; | |
298 | struct sysdev_class *edac_class; | |
299 | ||
300 | debugf1("%s()\n", __func__); | |
301 | ||
302 | edac_class = edac_get_edac_class(); | |
91b99041 DJ |
303 | if (edac_class == NULL) { |
304 | debugf1("%s() no edac_class\n", __func__); | |
305 | return -ENODEV; | |
306 | } | |
7c9281d7 | 307 | |
7c9281d7 | 308 | edac_pci_kobj.ktype = &ktype_edac_pci; |
91b99041 DJ |
309 | |
310 | edac_pci_kobj.parent = &edac_class->kset.kobj; | |
311 | ||
7c9281d7 | 312 | err = kobject_set_name(&edac_pci_kobj, "pci"); |
91b99041 DJ |
313 | if(err) |
314 | return err; | |
7c9281d7 | 315 | |
91b99041 DJ |
316 | /* Instanstiate the pci object */ |
317 | /* FIXME: maybe new sysdev_create_subdir() */ | |
318 | err = kobject_register(&edac_pci_kobj); | |
7c9281d7 | 319 | |
91b99041 DJ |
320 | if (err) { |
321 | debugf1("Failed to register '.../edac/pci'\n"); | |
322 | return err; | |
7c9281d7 DT |
323 | } |
324 | ||
91b99041 DJ |
325 | debugf1("Registered '.../edac/pci' kobject\n"); |
326 | ||
327 | return 0; | |
7c9281d7 DT |
328 | } |
329 | ||
330 | /* | |
91b99041 | 331 | * edac_pci_unregister_main_kobj() |
7c9281d7 DT |
332 | * |
333 | * perform the sysfs teardown for the PCI attributes | |
334 | */ | |
91b99041 | 335 | void edac_pci_unregister_main_kobj(void) |
7c9281d7 DT |
336 | { |
337 | debugf0("%s()\n", __func__); | |
338 | init_completion(&edac_pci_kobj_complete); | |
339 | kobject_unregister(&edac_pci_kobj); | |
340 | wait_for_completion(&edac_pci_kobj_complete); | |
341 | } | |
342 | ||
91b99041 DJ |
343 | int edac_pci_create_sysfs(struct edac_pci_ctl_info *pci) |
344 | { | |
345 | int err; | |
346 | struct kobject *edac_kobj = &pci->kobj; | |
347 | ||
348 | if (atomic_inc_return(&edac_pci_sysfs_refcount) == 1) { | |
349 | err = edac_pci_register_main_kobj(); | |
350 | if (err) { | |
351 | atomic_dec(&edac_pci_sysfs_refcount); | |
352 | return err; | |
353 | } | |
354 | } | |
355 | ||
356 | err = edac_pci_create_instance_kobj(pci, pci->pci_idx); | |
357 | if (err) { | |
358 | if (atomic_dec_return(&edac_pci_sysfs_refcount) == 0) | |
359 | edac_pci_unregister_main_kobj(); | |
360 | } | |
7c9281d7 | 361 | |
91b99041 DJ |
362 | |
363 | debugf0("%s() idx=%d\n", __func__, pci->pci_idx); | |
364 | ||
365 | err = sysfs_create_link(edac_kobj, | |
366 | &pci->dev->kobj, | |
367 | EDAC_PCI_SYMLINK); | |
368 | if (err) { | |
369 | debugf0("%s() sysfs_create_link() returned err= %d\n", | |
370 | __func__, err); | |
371 | return err; | |
372 | } | |
373 | ||
374 | return 0; | |
375 | } | |
376 | ||
377 | void edac_pci_remove_sysfs(struct edac_pci_ctl_info *pci) | |
378 | { | |
379 | debugf0("%s()\n", __func__); | |
380 | ||
381 | edac_pci_delete_instance_kobj(pci, pci->pci_idx); | |
382 | ||
383 | sysfs_remove_link(&pci->kobj, EDAC_PCI_SYMLINK); | |
384 | ||
385 | if (atomic_dec_return(&edac_pci_sysfs_refcount) == 0) | |
386 | edac_pci_unregister_main_kobj(); | |
387 | } | |
388 | ||
389 | /************************ PCI error handling *************************/ | |
7c9281d7 DT |
390 | static u16 get_pci_parity_status(struct pci_dev *dev, int secondary) |
391 | { | |
392 | int where; | |
393 | u16 status; | |
394 | ||
395 | where = secondary ? PCI_SEC_STATUS : PCI_STATUS; | |
396 | pci_read_config_word(dev, where, &status); | |
397 | ||
398 | /* If we get back 0xFFFF then we must suspect that the card has been | |
399 | * pulled but the Linux PCI layer has not yet finished cleaning up. | |
400 | * We don't want to report on such devices | |
401 | */ | |
402 | ||
403 | if (status == 0xFFFF) { | |
404 | u32 sanity; | |
405 | ||
406 | pci_read_config_dword(dev, 0, &sanity); | |
407 | ||
408 | if (sanity == 0xFFFFFFFF) | |
409 | return 0; | |
410 | } | |
411 | ||
412 | status &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR | | |
413 | PCI_STATUS_PARITY; | |
414 | ||
415 | if (status) | |
416 | /* reset only the bits we are interested in */ | |
417 | pci_write_config_word(dev, where, status); | |
418 | ||
419 | return status; | |
420 | } | |
421 | ||
422 | typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev); | |
423 | ||
424 | /* Clear any PCI parity errors logged by this device. */ | |
425 | static void edac_pci_dev_parity_clear(struct pci_dev *dev) | |
426 | { | |
427 | u8 header_type; | |
428 | ||
429 | get_pci_parity_status(dev, 0); | |
430 | ||
431 | /* read the device TYPE, looking for bridges */ | |
432 | pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); | |
433 | ||
434 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) | |
435 | get_pci_parity_status(dev, 1); | |
436 | } | |
437 | ||
438 | /* | |
439 | * PCI Parity polling | |
440 | * | |
441 | */ | |
442 | static void edac_pci_dev_parity_test(struct pci_dev *dev) | |
443 | { | |
444 | u16 status; | |
445 | u8 header_type; | |
446 | ||
447 | /* read the STATUS register on this device | |
448 | */ | |
449 | status = get_pci_parity_status(dev, 0); | |
450 | ||
451 | debugf2("PCI STATUS= 0x%04x %s\n", status, dev->dev.bus_id ); | |
452 | ||
453 | /* check the status reg for errors */ | |
454 | if (status) { | |
91b99041 | 455 | if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) { |
7c9281d7 DT |
456 | edac_printk(KERN_CRIT, EDAC_PCI, |
457 | "Signaled System Error on %s\n", | |
458 | pci_name(dev)); | |
91b99041 DJ |
459 | atomic_inc(&pci_nonparity_count); |
460 | } | |
7c9281d7 DT |
461 | |
462 | if (status & (PCI_STATUS_PARITY)) { | |
463 | edac_printk(KERN_CRIT, EDAC_PCI, | |
464 | "Master Data Parity Error on %s\n", | |
465 | pci_name(dev)); | |
466 | ||
467 | atomic_inc(&pci_parity_count); | |
468 | } | |
469 | ||
470 | if (status & (PCI_STATUS_DETECTED_PARITY)) { | |
471 | edac_printk(KERN_CRIT, EDAC_PCI, | |
472 | "Detected Parity Error on %s\n", | |
473 | pci_name(dev)); | |
474 | ||
475 | atomic_inc(&pci_parity_count); | |
476 | } | |
477 | } | |
478 | ||
479 | /* read the device TYPE, looking for bridges */ | |
480 | pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); | |
481 | ||
482 | debugf2("PCI HEADER TYPE= 0x%02x %s\n", header_type, dev->dev.bus_id ); | |
483 | ||
484 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { | |
485 | /* On bridges, need to examine secondary status register */ | |
486 | status = get_pci_parity_status(dev, 1); | |
487 | ||
488 | debugf2("PCI SEC_STATUS= 0x%04x %s\n", | |
489 | status, dev->dev.bus_id ); | |
490 | ||
491 | /* check the secondary status reg for errors */ | |
492 | if (status) { | |
91b99041 | 493 | if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) { |
7c9281d7 DT |
494 | edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " |
495 | "Signaled System Error on %s\n", | |
496 | pci_name(dev)); | |
91b99041 DJ |
497 | atomic_inc(&pci_nonparity_count); |
498 | } | |
7c9281d7 DT |
499 | |
500 | if (status & (PCI_STATUS_PARITY)) { | |
501 | edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " | |
502 | "Master Data Parity Error on " | |
503 | "%s\n", pci_name(dev)); | |
504 | ||
505 | atomic_inc(&pci_parity_count); | |
506 | } | |
507 | ||
508 | if (status & (PCI_STATUS_DETECTED_PARITY)) { | |
509 | edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " | |
510 | "Detected Parity Error on %s\n", | |
511 | pci_name(dev)); | |
512 | ||
513 | atomic_inc(&pci_parity_count); | |
514 | } | |
515 | } | |
516 | } | |
517 | } | |
518 | ||
519 | /* | |
520 | * pci_dev parity list iterator | |
521 | * Scan the PCI device list for one iteration, looking for SERRORs | |
522 | * Master Parity ERRORS or Parity ERRORs on primary or secondary devices | |
523 | */ | |
524 | static inline void edac_pci_dev_parity_iterator(pci_parity_check_fn_t fn) | |
525 | { | |
526 | struct pci_dev *dev = NULL; | |
527 | ||
528 | /* request for kernel access to the next PCI device, if any, | |
529 | * and while we are looking at it have its reference count | |
530 | * bumped until we are done with it | |
531 | */ | |
532 | while((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { | |
533 | fn(dev); | |
534 | } | |
535 | } | |
536 | ||
537 | /* | |
538 | * edac_pci_do_parity_check | |
539 | * | |
540 | * performs the actual PCI parity check operation | |
541 | */ | |
542 | void edac_pci_do_parity_check(void) | |
543 | { | |
544 | unsigned long flags; | |
545 | int before_count; | |
546 | ||
547 | debugf3("%s()\n", __func__); | |
548 | ||
91b99041 | 549 | if (!check_pci_errors) |
7c9281d7 DT |
550 | return; |
551 | ||
552 | before_count = atomic_read(&pci_parity_count); | |
553 | ||
554 | /* scan all PCI devices looking for a Parity Error on devices and | |
555 | * bridges | |
556 | */ | |
557 | local_irq_save(flags); | |
558 | edac_pci_dev_parity_iterator(edac_pci_dev_parity_test); | |
559 | local_irq_restore(flags); | |
560 | ||
561 | /* Only if operator has selected panic on PCI Error */ | |
4de78c68 | 562 | if (edac_pci_get_panic_on_pe()) { |
7c9281d7 DT |
563 | /* If the count is different 'after' from 'before' */ |
564 | if (before_count != atomic_read(&pci_parity_count)) | |
565 | panic("EDAC: PCI Parity Error"); | |
566 | } | |
567 | } | |
568 | ||
569 | void edac_pci_clear_parity_errors(void) | |
570 | { | |
571 | /* Clear any PCI bus parity errors that devices initially have logged | |
572 | * in their registers. | |
573 | */ | |
574 | edac_pci_dev_parity_iterator(edac_pci_dev_parity_clear); | |
575 | } | |
91b99041 DJ |
576 | void edac_pci_handle_pe(struct edac_pci_ctl_info *pci, const char *msg) |
577 | { | |
578 | ||
579 | /* global PE counter incremented by edac_pci_do_parity_check() */ | |
580 | atomic_inc(&pci->counters.pe_count); | |
581 | ||
4de78c68 | 582 | if (edac_pci_get_log_pe()) |
91b99041 DJ |
583 | edac_pci_printk(pci, KERN_WARNING, |
584 | "Parity Error ctl: %s %d: %s\n", | |
585 | pci->ctl_name, pci->pci_idx, msg); | |
586 | ||
587 | /* | |
588 | * poke all PCI devices and see which one is the troublemaker | |
589 | * panic() is called if set | |
590 | */ | |
591 | edac_pci_do_parity_check(); | |
592 | } | |
593 | EXPORT_SYMBOL_GPL(edac_pci_handle_pe); | |
7c9281d7 | 594 | |
91b99041 DJ |
595 | void edac_pci_handle_npe(struct edac_pci_ctl_info *pci, const char *msg) |
596 | { | |
597 | ||
598 | /* global NPE counter incremented by edac_pci_do_parity_check() */ | |
599 | atomic_inc(&pci->counters.npe_count); | |
600 | ||
4de78c68 | 601 | if (edac_pci_get_log_npe()) |
91b99041 DJ |
602 | edac_pci_printk(pci, KERN_WARNING, |
603 | "Non-Parity Error ctl: %s %d: %s\n", | |
604 | pci->ctl_name, pci->pci_idx, msg); | |
605 | ||
606 | /* | |
607 | * poke all PCI devices and see which one is the troublemaker | |
608 | * panic() is called if set | |
609 | */ | |
610 | edac_pci_do_parity_check(); | |
611 | } | |
612 | EXPORT_SYMBOL_GPL(edac_pci_handle_npe); | |
7c9281d7 DT |
613 | |
614 | /* | |
615 | * Define the PCI parameter to the module | |
616 | */ | |
91b99041 | 617 | module_param(check_pci_errors, int, 0644); |
4de78c68 DJ |
618 | MODULE_PARM_DESC(check_pci_errors, |
619 | "Check for PCI bus parity errors: 0=off 1=on"); | |
620 | module_param(edac_pci_panic_on_pe, int, 0644); | |
621 | MODULE_PARM_DESC(edac_pci_panic_on_pe, | |
622 | "Panic on PCI Bus Parity error: 0=off 1=on"); | |
7c9281d7 DT |
623 | |
624 | #endif /* CONFIG_PCI */ |