1 /* 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 13 #include "edac_core.h" 14 #include "edac_module.h" 15 16 /* Turn off this whole feature if PCI is not configured */ 17 #ifdef CONFIG_PCI 18 19 #define EDAC_PCI_SYMLINK "device" 20 21 /* data variables exported via sysfs */ 22 static int check_pci_errors; /* default NO check PCI parity */ 23 static int edac_pci_panic_on_pe; /* default NO panic on PCI Parity */ 24 static int edac_pci_log_pe = 1; /* log PCI parity errors */ 25 static int edac_pci_log_npe = 1; /* log PCI non-parity error errors */ 26 static int edac_pci_poll_msec = 1000; /* one second workq period */ 27 28 static atomic_t pci_parity_count = ATOMIC_INIT(0); 29 static atomic_t pci_nonparity_count = ATOMIC_INIT(0); 30 31 static struct kobject edac_pci_top_main_kobj; 32 static atomic_t edac_pci_sysfs_refcount = ATOMIC_INIT(0); 33 34 /* getter functions for the data variables */ 35 int edac_pci_get_check_errors(void) 36 { 37 return check_pci_errors; 38 } 39 40 static int edac_pci_get_log_pe(void) 41 { 42 return edac_pci_log_pe; 43 } 44 45 static int edac_pci_get_log_npe(void) 46 { 47 return edac_pci_log_npe; 48 } 49 50 static int edac_pci_get_panic_on_pe(void) 51 { 52 return edac_pci_panic_on_pe; 53 } 54 55 int edac_pci_get_poll_msec(void) 56 { 57 return edac_pci_poll_msec; 58 } 59 60 /**************************** EDAC PCI sysfs instance *******************/ 61 static ssize_t instance_pe_count_show(struct edac_pci_ctl_info *pci, char *data) 62 { 63 return sprintf(data, "%u\n", atomic_read(&pci->counters.pe_count)); 64 } 65 66 static ssize_t instance_npe_count_show(struct edac_pci_ctl_info *pci, 67 char *data) 68 { 69 return sprintf(data, "%u\n", atomic_read(&pci->counters.npe_count)); 70 } 71 72 #define to_instance(k) container_of(k, struct edac_pci_ctl_info, kobj) 73 #define to_instance_attr(a) container_of(a, struct instance_attribute, attr) 74 75 /* DEVICE instance kobject release() function */ 76 static void edac_pci_instance_release(struct kobject *kobj) 77 { 78 struct edac_pci_ctl_info *pci; 79 80 debugf0("%s()\n", __func__); 81 82 /* Form pointer to containing struct, the pci control struct */ 83 pci = to_instance(kobj); 84 85 /* decrement reference count on top main kobj */ 86 kobject_put(&edac_pci_top_main_kobj); 87 88 kfree(pci); /* Free the control struct */ 89 } 90 91 /* instance specific attribute structure */ 92 struct instance_attribute { 93 struct attribute attr; 94 ssize_t(*show) (struct edac_pci_ctl_info *, char *); 95 ssize_t(*store) (struct edac_pci_ctl_info *, const char *, size_t); 96 }; 97 98 /* Function to 'show' fields from the edac_pci 'instance' structure */ 99 static ssize_t edac_pci_instance_show(struct kobject *kobj, 100 struct attribute *attr, char *buffer) 101 { 102 struct edac_pci_ctl_info *pci = to_instance(kobj); 103 struct instance_attribute *instance_attr = to_instance_attr(attr); 104 105 if (instance_attr->show) 106 return instance_attr->show(pci, buffer); 107 return -EIO; 108 } 109 110 /* Function to 'store' fields into the edac_pci 'instance' structure */ 111 static ssize_t edac_pci_instance_store(struct kobject *kobj, 112 struct attribute *attr, 113 const char *buffer, size_t count) 114 { 115 struct edac_pci_ctl_info *pci = to_instance(kobj); 116 struct instance_attribute *instance_attr = to_instance_attr(attr); 117 118 if (instance_attr->store) 119 return instance_attr->store(pci, buffer, count); 120 return -EIO; 121 } 122 123 /* fs_ops table */ 124 static struct sysfs_ops pci_instance_ops = { 125 .show = edac_pci_instance_show, 126 .store = edac_pci_instance_store 127 }; 128 129 #define INSTANCE_ATTR(_name, _mode, _show, _store) \ 130 static struct instance_attribute attr_instance_##_name = { \ 131 .attr = {.name = __stringify(_name), .mode = _mode }, \ 132 .show = _show, \ 133 .store = _store, \ 134 }; 135 136 INSTANCE_ATTR(pe_count, S_IRUGO, instance_pe_count_show, NULL); 137 INSTANCE_ATTR(npe_count, S_IRUGO, instance_npe_count_show, NULL); 138 139 /* pci instance attributes */ 140 static struct instance_attribute *pci_instance_attr[] = { 141 &attr_instance_pe_count, 142 &attr_instance_npe_count, 143 NULL 144 }; 145 146 /* the ktype for a pci instance */ 147 static struct kobj_type ktype_pci_instance = { 148 .release = edac_pci_instance_release, 149 .sysfs_ops = &pci_instance_ops, 150 .default_attrs = (struct attribute **)pci_instance_attr, 151 }; 152 153 /* 154 * edac_pci_create_instance_kobj 155 * 156 * construct one EDAC PCI instance's kobject for use 157 */ 158 static int edac_pci_create_instance_kobj(struct edac_pci_ctl_info *pci, int idx) 159 { 160 struct kobject *main_kobj; 161 int err; 162 163 debugf0("%s()\n", __func__); 164 165 /* First bump the ref count on the top main kobj, which will 166 * track the number of PCI instances we have, and thus nest 167 * properly on keeping the module loaded 168 */ 169 main_kobj = kobject_get(&edac_pci_top_main_kobj); 170 if (!main_kobj) { 171 err = -ENODEV; 172 goto error_out; 173 } 174 175 /* And now register this new kobject under the main kobj */ 176 err = kobject_init_and_add(&pci->kobj, &ktype_pci_instance, 177 &edac_pci_top_main_kobj, "pci%d", idx); 178 if (err != 0) { 179 debugf2("%s() failed to register instance pci%d\n", 180 __func__, idx); 181 kobject_put(&edac_pci_top_main_kobj); 182 goto error_out; 183 } 184 185 kobject_uevent(&pci->kobj, KOBJ_ADD); 186 debugf1("%s() Register instance 'pci%d' kobject\n", __func__, idx); 187 188 return 0; 189 190 /* Error unwind statck */ 191 error_out: 192 return err; 193 } 194 195 /* 196 * edac_pci_unregister_sysfs_instance_kobj 197 * 198 * unregister the kobj for the EDAC PCI instance 199 */ 200 static void edac_pci_unregister_sysfs_instance_kobj( 201 struct edac_pci_ctl_info *pci) 202 { 203 debugf0("%s()\n", __func__); 204 205 /* Unregister the instance kobject and allow its release 206 * function release the main reference count and then 207 * kfree the memory 208 */ 209 kobject_put(&pci->kobj); 210 } 211 212 /***************************** EDAC PCI sysfs root **********************/ 213 #define to_edacpci(k) container_of(k, struct edac_pci_ctl_info, kobj) 214 #define to_edacpci_attr(a) container_of(a, struct edac_pci_attr, attr) 215 216 /* simple show/store functions for attributes */ 217 static ssize_t edac_pci_int_show(void *ptr, char *buffer) 218 { 219 int *value = ptr; 220 return sprintf(buffer, "%d\n", *value); 221 } 222 223 static ssize_t edac_pci_int_store(void *ptr, const char *buffer, size_t count) 224 { 225 int *value = ptr; 226 227 if (isdigit(*buffer)) 228 *value = simple_strtoul(buffer, NULL, 0); 229 230 return count; 231 } 232 233 struct edac_pci_dev_attribute { 234 struct attribute attr; 235 void *value; 236 ssize_t(*show) (void *, char *); 237 ssize_t(*store) (void *, const char *, size_t); 238 }; 239 240 /* Set of show/store abstract level functions for PCI Parity object */ 241 static ssize_t edac_pci_dev_show(struct kobject *kobj, struct attribute *attr, 242 char *buffer) 243 { 244 struct edac_pci_dev_attribute *edac_pci_dev; 245 edac_pci_dev = (struct edac_pci_dev_attribute *)attr; 246 247 if (edac_pci_dev->show) 248 return edac_pci_dev->show(edac_pci_dev->value, buffer); 249 return -EIO; 250 } 251 252 static ssize_t edac_pci_dev_store(struct kobject *kobj, 253 struct attribute *attr, const char *buffer, 254 size_t count) 255 { 256 struct edac_pci_dev_attribute *edac_pci_dev; 257 edac_pci_dev = (struct edac_pci_dev_attribute *)attr; 258 259 if (edac_pci_dev->show) 260 return edac_pci_dev->store(edac_pci_dev->value, buffer, count); 261 return -EIO; 262 } 263 264 static struct sysfs_ops edac_pci_sysfs_ops = { 265 .show = edac_pci_dev_show, 266 .store = edac_pci_dev_store 267 }; 268 269 #define EDAC_PCI_ATTR(_name,_mode,_show,_store) \ 270 static struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ 271 .attr = {.name = __stringify(_name), .mode = _mode }, \ 272 .value = &_name, \ 273 .show = _show, \ 274 .store = _store, \ 275 }; 276 277 #define EDAC_PCI_STRING_ATTR(_name,_data,_mode,_show,_store) \ 278 static struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ 279 .attr = {.name = __stringify(_name), .mode = _mode }, \ 280 .value = _data, \ 281 .show = _show, \ 282 .store = _store, \ 283 }; 284 285 /* PCI Parity control files */ 286 EDAC_PCI_ATTR(check_pci_errors, S_IRUGO | S_IWUSR, edac_pci_int_show, 287 edac_pci_int_store); 288 EDAC_PCI_ATTR(edac_pci_log_pe, S_IRUGO | S_IWUSR, edac_pci_int_show, 289 edac_pci_int_store); 290 EDAC_PCI_ATTR(edac_pci_log_npe, S_IRUGO | S_IWUSR, edac_pci_int_show, 291 edac_pci_int_store); 292 EDAC_PCI_ATTR(edac_pci_panic_on_pe, S_IRUGO | S_IWUSR, edac_pci_int_show, 293 edac_pci_int_store); 294 EDAC_PCI_ATTR(pci_parity_count, S_IRUGO, edac_pci_int_show, NULL); 295 EDAC_PCI_ATTR(pci_nonparity_count, S_IRUGO, edac_pci_int_show, NULL); 296 297 /* Base Attributes of the memory ECC object */ 298 static struct edac_pci_dev_attribute *edac_pci_attr[] = { 299 &edac_pci_attr_check_pci_errors, 300 &edac_pci_attr_edac_pci_log_pe, 301 &edac_pci_attr_edac_pci_log_npe, 302 &edac_pci_attr_edac_pci_panic_on_pe, 303 &edac_pci_attr_pci_parity_count, 304 &edac_pci_attr_pci_nonparity_count, 305 NULL, 306 }; 307 308 /* 309 * edac_pci_release_main_kobj 310 * 311 * This release function is called when the reference count to the 312 * passed kobj goes to zero. 313 * 314 * This kobj is the 'main' kobject that EDAC PCI instances 315 * link to, and thus provide for proper nesting counts 316 */ 317 static void edac_pci_release_main_kobj(struct kobject *kobj) 318 { 319 320 debugf0("%s() here to module_put(THIS_MODULE)\n", __func__); 321 322 /* last reference to top EDAC PCI kobject has been removed, 323 * NOW release our ref count on the core module 324 */ 325 module_put(THIS_MODULE); 326 } 327 328 /* ktype struct for the EDAC PCI main kobj */ 329 static struct kobj_type ktype_edac_pci_main_kobj = { 330 .release = edac_pci_release_main_kobj, 331 .sysfs_ops = &edac_pci_sysfs_ops, 332 .default_attrs = (struct attribute **)edac_pci_attr, 333 }; 334 335 /** 336 * edac_pci_main_kobj_setup() 337 * 338 * setup the sysfs for EDAC PCI attributes 339 * assumes edac_class has already been initialized 340 */ 341 static int edac_pci_main_kobj_setup(void) 342 { 343 int err; 344 struct sysdev_class *edac_class; 345 346 debugf0("%s()\n", __func__); 347 348 /* check and count if we have already created the main kobject */ 349 if (atomic_inc_return(&edac_pci_sysfs_refcount) != 1) 350 return 0; 351 352 /* First time, so create the main kobject and its 353 * controls and atributes 354 */ 355 edac_class = edac_get_edac_class(); 356 if (edac_class == NULL) { 357 debugf1("%s() no edac_class\n", __func__); 358 err = -ENODEV; 359 goto decrement_count_fail; 360 } 361 362 /* Bump the reference count on this module to ensure the 363 * modules isn't unloaded until we deconstruct the top 364 * level main kobj for EDAC PCI 365 */ 366 if (!try_module_get(THIS_MODULE)) { 367 debugf1("%s() try_module_get() failed\n", __func__); 368 err = -ENODEV; 369 goto decrement_count_fail; 370 } 371 372 /* Instanstiate the pci object */ 373 err = kobject_init_and_add(&edac_pci_top_main_kobj, &ktype_edac_pci_main_kobj, 374 &edac_class->kset.kobj, "pci"); 375 if (err) { 376 debugf1("Failed to register '.../edac/pci'\n"); 377 goto kobject_init_and_add_fail; 378 } 379 380 /* At this point, to 'release' the top level kobject 381 * for EDAC PCI, then edac_pci_main_kobj_teardown() 382 * must be used, for resources to be cleaned up properly 383 */ 384 kobject_uevent(&edac_pci_top_main_kobj, KOBJ_ADD); 385 debugf1("Registered '.../edac/pci' kobject\n"); 386 387 return 0; 388 389 /* Error unwind statck */ 390 kobject_init_and_add_fail: 391 module_put(THIS_MODULE); 392 393 decrement_count_fail: 394 /* if are on this error exit, nothing to tear down */ 395 atomic_dec(&edac_pci_sysfs_refcount); 396 397 return err; 398 } 399 400 /* 401 * edac_pci_main_kobj_teardown() 402 * 403 * if no longer linked (needed) remove the top level EDAC PCI 404 * kobject with its controls and attributes 405 */ 406 static void edac_pci_main_kobj_teardown(void) 407 { 408 debugf0("%s()\n", __func__); 409 410 /* Decrement the count and only if no more controller instances 411 * are connected perform the unregisteration of the top level 412 * main kobj 413 */ 414 if (atomic_dec_return(&edac_pci_sysfs_refcount) == 0) { 415 debugf0("%s() called kobject_put on main kobj\n", 416 __func__); 417 kobject_put(&edac_pci_top_main_kobj); 418 } 419 } 420 421 /* 422 * 423 * edac_pci_create_sysfs 424 * 425 * Create the controls/attributes for the specified EDAC PCI device 426 */ 427 int edac_pci_create_sysfs(struct edac_pci_ctl_info *pci) 428 { 429 int err; 430 struct kobject *edac_kobj = &pci->kobj; 431 432 debugf0("%s() idx=%d\n", __func__, pci->pci_idx); 433 434 /* create the top main EDAC PCI kobject, IF needed */ 435 err = edac_pci_main_kobj_setup(); 436 if (err) 437 return err; 438 439 /* Create this instance's kobject under the MAIN kobject */ 440 err = edac_pci_create_instance_kobj(pci, pci->pci_idx); 441 if (err) 442 goto unregister_cleanup; 443 444 err = sysfs_create_link(edac_kobj, &pci->dev->kobj, EDAC_PCI_SYMLINK); 445 if (err) { 446 debugf0("%s() sysfs_create_link() returned err= %d\n", 447 __func__, err); 448 goto symlink_fail; 449 } 450 451 return 0; 452 453 /* Error unwind stack */ 454 symlink_fail: 455 edac_pci_unregister_sysfs_instance_kobj(pci); 456 457 unregister_cleanup: 458 edac_pci_main_kobj_teardown(); 459 460 return err; 461 } 462 463 /* 464 * edac_pci_remove_sysfs 465 * 466 * remove the controls and attributes for this EDAC PCI device 467 */ 468 void edac_pci_remove_sysfs(struct edac_pci_ctl_info *pci) 469 { 470 debugf0("%s() index=%d\n", __func__, pci->pci_idx); 471 472 /* Remove the symlink */ 473 sysfs_remove_link(&pci->kobj, EDAC_PCI_SYMLINK); 474 475 /* remove this PCI instance's sysfs entries */ 476 edac_pci_unregister_sysfs_instance_kobj(pci); 477 478 /* Call the main unregister function, which will determine 479 * if this 'pci' is the last instance. 480 * If it is, the main kobject will be unregistered as a result 481 */ 482 debugf0("%s() calling edac_pci_main_kobj_teardown()\n", __func__); 483 edac_pci_main_kobj_teardown(); 484 } 485 486 /************************ PCI error handling *************************/ 487 static u16 get_pci_parity_status(struct pci_dev *dev, int secondary) 488 { 489 int where; 490 u16 status; 491 492 where = secondary ? PCI_SEC_STATUS : PCI_STATUS; 493 pci_read_config_word(dev, where, &status); 494 495 /* If we get back 0xFFFF then we must suspect that the card has been 496 * pulled but the Linux PCI layer has not yet finished cleaning up. 497 * We don't want to report on such devices 498 */ 499 500 if (status == 0xFFFF) { 501 u32 sanity; 502 503 pci_read_config_dword(dev, 0, &sanity); 504 505 if (sanity == 0xFFFFFFFF) 506 return 0; 507 } 508 509 status &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR | 510 PCI_STATUS_PARITY; 511 512 if (status) 513 /* reset only the bits we are interested in */ 514 pci_write_config_word(dev, where, status); 515 516 return status; 517 } 518 519 520 /* Clear any PCI parity errors logged by this device. */ 521 static void edac_pci_dev_parity_clear(struct pci_dev *dev) 522 { 523 u8 header_type; 524 525 debugf0("%s()\n", __func__); 526 527 get_pci_parity_status(dev, 0); 528 529 /* read the device TYPE, looking for bridges */ 530 pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); 531 532 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) 533 get_pci_parity_status(dev, 1); 534 } 535 536 /* 537 * PCI Parity polling 538 * 539 * Fucntion to retrieve the current parity status 540 * and decode it 541 * 542 */ 543 static void edac_pci_dev_parity_test(struct pci_dev *dev) 544 { 545 unsigned long flags; 546 u16 status; 547 u8 header_type; 548 549 /* stop any interrupts until we can acquire the status */ 550 local_irq_save(flags); 551 552 /* read the STATUS register on this device */ 553 status = get_pci_parity_status(dev, 0); 554 555 /* read the device TYPE, looking for bridges */ 556 pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); 557 558 local_irq_restore(flags); 559 560 debugf4("PCI STATUS= 0x%04x %s\n", status, dev->dev.bus_id); 561 562 /* check the status reg for errors on boards NOT marked as broken 563 * if broken, we cannot trust any of the status bits 564 */ 565 if (status && !dev->broken_parity_status) { 566 if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) { 567 edac_printk(KERN_CRIT, EDAC_PCI, 568 "Signaled System Error on %s\n", 569 pci_name(dev)); 570 atomic_inc(&pci_nonparity_count); 571 } 572 573 if (status & (PCI_STATUS_PARITY)) { 574 edac_printk(KERN_CRIT, EDAC_PCI, 575 "Master Data Parity Error on %s\n", 576 pci_name(dev)); 577 578 atomic_inc(&pci_parity_count); 579 } 580 581 if (status & (PCI_STATUS_DETECTED_PARITY)) { 582 edac_printk(KERN_CRIT, EDAC_PCI, 583 "Detected Parity Error on %s\n", 584 pci_name(dev)); 585 586 atomic_inc(&pci_parity_count); 587 } 588 } 589 590 591 debugf4("PCI HEADER TYPE= 0x%02x %s\n", header_type, dev->dev.bus_id); 592 593 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { 594 /* On bridges, need to examine secondary status register */ 595 status = get_pci_parity_status(dev, 1); 596 597 debugf4("PCI SEC_STATUS= 0x%04x %s\n", status, dev->dev.bus_id); 598 599 /* check the secondary status reg for errors, 600 * on NOT broken boards 601 */ 602 if (status && !dev->broken_parity_status) { 603 if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) { 604 edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " 605 "Signaled System Error on %s\n", 606 pci_name(dev)); 607 atomic_inc(&pci_nonparity_count); 608 } 609 610 if (status & (PCI_STATUS_PARITY)) { 611 edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " 612 "Master Data Parity Error on " 613 "%s\n", pci_name(dev)); 614 615 atomic_inc(&pci_parity_count); 616 } 617 618 if (status & (PCI_STATUS_DETECTED_PARITY)) { 619 edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " 620 "Detected Parity Error on %s\n", 621 pci_name(dev)); 622 623 atomic_inc(&pci_parity_count); 624 } 625 } 626 } 627 } 628 629 /* reduce some complexity in definition of the iterator */ 630 typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev); 631 632 /* 633 * pci_dev parity list iterator 634 * Scan the PCI device list for one pass, looking for SERRORs 635 * Master Parity ERRORS or Parity ERRORs on primary or secondary devices 636 */ 637 static inline void edac_pci_dev_parity_iterator(pci_parity_check_fn_t fn) 638 { 639 struct pci_dev *dev = NULL; 640 641 /* request for kernel access to the next PCI device, if any, 642 * and while we are looking at it have its reference count 643 * bumped until we are done with it 644 */ 645 while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { 646 fn(dev); 647 } 648 } 649 650 /* 651 * edac_pci_do_parity_check 652 * 653 * performs the actual PCI parity check operation 654 */ 655 void edac_pci_do_parity_check(void) 656 { 657 int before_count; 658 659 debugf3("%s()\n", __func__); 660 661 /* if policy has PCI check off, leave now */ 662 if (!check_pci_errors) 663 return; 664 665 before_count = atomic_read(&pci_parity_count); 666 667 /* scan all PCI devices looking for a Parity Error on devices and 668 * bridges. 669 * The iterator calls pci_get_device() which might sleep, thus 670 * we cannot disable interrupts in this scan. 671 */ 672 edac_pci_dev_parity_iterator(edac_pci_dev_parity_test); 673 674 /* Only if operator has selected panic on PCI Error */ 675 if (edac_pci_get_panic_on_pe()) { 676 /* If the count is different 'after' from 'before' */ 677 if (before_count != atomic_read(&pci_parity_count)) 678 panic("EDAC: PCI Parity Error"); 679 } 680 } 681 682 /* 683 * edac_pci_clear_parity_errors 684 * 685 * function to perform an iteration over the PCI devices 686 * and clearn their current status 687 */ 688 void edac_pci_clear_parity_errors(void) 689 { 690 /* Clear any PCI bus parity errors that devices initially have logged 691 * in their registers. 692 */ 693 edac_pci_dev_parity_iterator(edac_pci_dev_parity_clear); 694 } 695 696 /* 697 * edac_pci_handle_pe 698 * 699 * Called to handle a PARITY ERROR event 700 */ 701 void edac_pci_handle_pe(struct edac_pci_ctl_info *pci, const char *msg) 702 { 703 704 /* global PE counter incremented by edac_pci_do_parity_check() */ 705 atomic_inc(&pci->counters.pe_count); 706 707 if (edac_pci_get_log_pe()) 708 edac_pci_printk(pci, KERN_WARNING, 709 "Parity Error ctl: %s %d: %s\n", 710 pci->ctl_name, pci->pci_idx, msg); 711 712 /* 713 * poke all PCI devices and see which one is the troublemaker 714 * panic() is called if set 715 */ 716 edac_pci_do_parity_check(); 717 } 718 EXPORT_SYMBOL_GPL(edac_pci_handle_pe); 719 720 721 /* 722 * edac_pci_handle_npe 723 * 724 * Called to handle a NON-PARITY ERROR event 725 */ 726 void edac_pci_handle_npe(struct edac_pci_ctl_info *pci, const char *msg) 727 { 728 729 /* global NPE counter incremented by edac_pci_do_parity_check() */ 730 atomic_inc(&pci->counters.npe_count); 731 732 if (edac_pci_get_log_npe()) 733 edac_pci_printk(pci, KERN_WARNING, 734 "Non-Parity Error ctl: %s %d: %s\n", 735 pci->ctl_name, pci->pci_idx, msg); 736 737 /* 738 * poke all PCI devices and see which one is the troublemaker 739 * panic() is called if set 740 */ 741 edac_pci_do_parity_check(); 742 } 743 EXPORT_SYMBOL_GPL(edac_pci_handle_npe); 744 745 /* 746 * Define the PCI parameter to the module 747 */ 748 module_param(check_pci_errors, int, 0644); 749 MODULE_PARM_DESC(check_pci_errors, 750 "Check for PCI bus parity errors: 0=off 1=on"); 751 module_param(edac_pci_panic_on_pe, int, 0644); 752 MODULE_PARM_DESC(edac_pci_panic_on_pe, 753 "Panic on PCI Bus Parity error: 0=off 1=on"); 754 755 #endif /* CONFIG_PCI */ 756