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/slab.h> 12#include <linux/ctype.h> 13 14#include "edac_core.h" 15#include "edac_module.h" 16 17/* Turn off this whole feature if PCI is not configured */ 18#ifdef CONFIG_PCI 19 20#define EDAC_PCI_SYMLINK "device" 21 22/* data variables exported via sysfs */ 23static int check_pci_errors; /* default NO check PCI parity */ 24static int edac_pci_panic_on_pe; /* default NO panic on PCI Parity */ 25static int edac_pci_log_pe = 1; /* log PCI parity errors */ 26static int edac_pci_log_npe = 1; /* log PCI non-parity error errors */ 27static int edac_pci_poll_msec = 1000; /* one second workq period */ 28 29static atomic_t pci_parity_count = ATOMIC_INIT(0); 30static atomic_t pci_nonparity_count = ATOMIC_INIT(0); 31 32static struct kobject *edac_pci_top_main_kobj; 33static atomic_t edac_pci_sysfs_refcount = ATOMIC_INIT(0); 34 35/* getter functions for the data variables */ 36int edac_pci_get_check_errors(void) 37{ 38 return check_pci_errors; 39} 40 41static int edac_pci_get_log_pe(void) 42{ 43 return edac_pci_log_pe; 44} 45 46static int edac_pci_get_log_npe(void) 47{ 48 return edac_pci_log_npe; 49} 50 51static int edac_pci_get_panic_on_pe(void) 52{ 53 return edac_pci_panic_on_pe; 54} 55 56int edac_pci_get_poll_msec(void) 57{ 58 return edac_pci_poll_msec; 59} 60 61/**************************** EDAC PCI sysfs instance *******************/ 62static ssize_t instance_pe_count_show(struct edac_pci_ctl_info *pci, char *data) 63{ 64 return sprintf(data, "%u\n", atomic_read(&pci->counters.pe_count)); 65} 66 67static ssize_t instance_npe_count_show(struct edac_pci_ctl_info *pci, 68 char *data) 69{ 70 return sprintf(data, "%u\n", atomic_read(&pci->counters.npe_count)); 71} 72 73#define to_instance(k) container_of(k, struct edac_pci_ctl_info, kobj) 74#define to_instance_attr(a) container_of(a, struct instance_attribute, attr) 75 76/* DEVICE instance kobject release() function */ 77static void edac_pci_instance_release(struct kobject *kobj) 78{ 79 struct edac_pci_ctl_info *pci; 80 81 debugf0("%s()\n", __func__); 82 83 /* Form pointer to containing struct, the pci control struct */ 84 pci = to_instance(kobj); 85 86 /* decrement reference count on top main kobj */ 87 kobject_put(edac_pci_top_main_kobj); 88 89 kfree(pci); /* Free the control struct */ 90} 91 92/* instance specific attribute structure */ 93struct instance_attribute { 94 struct attribute attr; 95 ssize_t(*show) (struct edac_pci_ctl_info *, char *); 96 ssize_t(*store) (struct edac_pci_ctl_info *, const char *, size_t); 97}; 98 99/* Function to 'show' fields from the edac_pci 'instance' structure */ 100static ssize_t edac_pci_instance_show(struct kobject *kobj, 101 struct attribute *attr, char *buffer) 102{ 103 struct edac_pci_ctl_info *pci = to_instance(kobj); 104 struct instance_attribute *instance_attr = to_instance_attr(attr); 105 106 if (instance_attr->show) 107 return instance_attr->show(pci, buffer); 108 return -EIO; 109} 110 111/* Function to 'store' fields into the edac_pci 'instance' structure */ 112static ssize_t edac_pci_instance_store(struct kobject *kobj, 113 struct attribute *attr, 114 const char *buffer, size_t count) 115{ 116 struct edac_pci_ctl_info *pci = to_instance(kobj); 117 struct instance_attribute *instance_attr = to_instance_attr(attr); 118 119 if (instance_attr->store) 120 return instance_attr->store(pci, buffer, count); 121 return -EIO; 122} 123 124/* fs_ops table */ 125static const struct sysfs_ops pci_instance_ops = { 126 .show = edac_pci_instance_show, 127 .store = edac_pci_instance_store 128}; 129 130#define INSTANCE_ATTR(_name, _mode, _show, _store) \ 131static struct instance_attribute attr_instance_##_name = { \ 132 .attr = {.name = __stringify(_name), .mode = _mode }, \ 133 .show = _show, \ 134 .store = _store, \ 135}; 136 137INSTANCE_ATTR(pe_count, S_IRUGO, instance_pe_count_show, NULL); 138INSTANCE_ATTR(npe_count, S_IRUGO, instance_npe_count_show, NULL); 139 140/* pci instance attributes */ 141static struct instance_attribute *pci_instance_attr[] = { 142 &attr_instance_pe_count, 143 &attr_instance_npe_count, 144 NULL 145}; 146 147/* the ktype for a pci instance */ 148static struct kobj_type ktype_pci_instance = { 149 .release = edac_pci_instance_release, 150 .sysfs_ops = &pci_instance_ops, 151 .default_attrs = (struct attribute **)pci_instance_attr, 152}; 153 154/* 155 * edac_pci_create_instance_kobj 156 * 157 * construct one EDAC PCI instance's kobject for use 158 */ 159static int edac_pci_create_instance_kobj(struct edac_pci_ctl_info *pci, int idx) 160{ 161 struct kobject *main_kobj; 162 int err; 163 164 debugf0("%s()\n", __func__); 165 166 /* First bump the ref count on the top main kobj, which will 167 * track the number of PCI instances we have, and thus nest 168 * properly on keeping the module loaded 169 */ 170 main_kobj = kobject_get(edac_pci_top_main_kobj); 171 if (!main_kobj) { 172 err = -ENODEV; 173 goto error_out; 174 } 175 176 /* And now register this new kobject under the main kobj */ 177 err = kobject_init_and_add(&pci->kobj, &ktype_pci_instance, 178 edac_pci_top_main_kobj, "pci%d", idx); 179 if (err != 0) { 180 debugf2("%s() failed to register instance pci%d\n", 181 __func__, idx); 182 kobject_put(edac_pci_top_main_kobj); 183 goto error_out; 184 } 185 186 kobject_uevent(&pci->kobj, KOBJ_ADD); 187 debugf1("%s() Register instance 'pci%d' kobject\n", __func__, idx); 188 189 return 0; 190 191 /* Error unwind statck */ 192error_out: 193 return err; 194} 195 196/* 197 * edac_pci_unregister_sysfs_instance_kobj 198 * 199 * unregister the kobj for the EDAC PCI instance 200 */ 201static void edac_pci_unregister_sysfs_instance_kobj( 202 struct edac_pci_ctl_info *pci) 203{ 204 debugf0("%s()\n", __func__); 205 206 /* Unregister the instance kobject and allow its release 207 * function release the main reference count and then 208 * kfree the memory 209 */ 210 kobject_put(&pci->kobj); 211} 212 213/***************************** EDAC PCI sysfs root **********************/ 214#define to_edacpci(k) container_of(k, struct edac_pci_ctl_info, kobj) 215#define to_edacpci_attr(a) container_of(a, struct edac_pci_attr, attr) 216 217/* simple show/store functions for attributes */ 218static ssize_t edac_pci_int_show(void *ptr, char *buffer) 219{ 220 int *value = ptr; 221 return sprintf(buffer, "%d\n", *value); 222} 223 224static ssize_t edac_pci_int_store(void *ptr, const char *buffer, size_t count) 225{ 226 int *value = ptr; 227 228 if (isdigit(*buffer)) 229 *value = simple_strtoul(buffer, NULL, 0); 230 231 return count; 232} 233 234struct edac_pci_dev_attribute { 235 struct attribute attr; 236 void *value; 237 ssize_t(*show) (void *, char *); 238 ssize_t(*store) (void *, const char *, size_t); 239}; 240 241/* Set of show/store abstract level functions for PCI Parity object */ 242static ssize_t edac_pci_dev_show(struct kobject *kobj, struct attribute *attr, 243 char *buffer) 244{ 245 struct edac_pci_dev_attribute *edac_pci_dev; 246 edac_pci_dev = (struct edac_pci_dev_attribute *)attr; 247 248 if (edac_pci_dev->show) 249 return edac_pci_dev->show(edac_pci_dev->value, buffer); 250 return -EIO; 251} 252 253static ssize_t edac_pci_dev_store(struct kobject *kobj, 254 struct attribute *attr, const char *buffer, 255 size_t count) 256{ 257 struct edac_pci_dev_attribute *edac_pci_dev; 258 edac_pci_dev = (struct edac_pci_dev_attribute *)attr; 259 260 if (edac_pci_dev->show) 261 return edac_pci_dev->store(edac_pci_dev->value, buffer, count); 262 return -EIO; 263} 264 265static const struct sysfs_ops edac_pci_sysfs_ops = { 266 .show = edac_pci_dev_show, 267 .store = edac_pci_dev_store 268}; 269 270#define EDAC_PCI_ATTR(_name,_mode,_show,_store) \ 271static struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ 272 .attr = {.name = __stringify(_name), .mode = _mode }, \ 273 .value = &_name, \ 274 .show = _show, \ 275 .store = _store, \ 276}; 277 278#define EDAC_PCI_STRING_ATTR(_name,_data,_mode,_show,_store) \ 279static struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ 280 .attr = {.name = __stringify(_name), .mode = _mode }, \ 281 .value = _data, \ 282 .show = _show, \ 283 .store = _store, \ 284}; 285 286/* PCI Parity control files */ 287EDAC_PCI_ATTR(check_pci_errors, S_IRUGO | S_IWUSR, edac_pci_int_show, 288 edac_pci_int_store); 289EDAC_PCI_ATTR(edac_pci_log_pe, S_IRUGO | S_IWUSR, edac_pci_int_show, 290 edac_pci_int_store); 291EDAC_PCI_ATTR(edac_pci_log_npe, S_IRUGO | S_IWUSR, edac_pci_int_show, 292 edac_pci_int_store); 293EDAC_PCI_ATTR(edac_pci_panic_on_pe, S_IRUGO | S_IWUSR, edac_pci_int_show, 294 edac_pci_int_store); 295EDAC_PCI_ATTR(pci_parity_count, S_IRUGO, edac_pci_int_show, NULL); 296EDAC_PCI_ATTR(pci_nonparity_count, S_IRUGO, edac_pci_int_show, NULL); 297 298/* Base Attributes of the memory ECC object */ 299static struct edac_pci_dev_attribute *edac_pci_attr[] = { 300 &edac_pci_attr_check_pci_errors, 301 &edac_pci_attr_edac_pci_log_pe, 302 &edac_pci_attr_edac_pci_log_npe, 303 &edac_pci_attr_edac_pci_panic_on_pe, 304 &edac_pci_attr_pci_parity_count, 305 &edac_pci_attr_pci_nonparity_count, 306 NULL, 307}; 308 309/* 310 * edac_pci_release_main_kobj 311 * 312 * This release function is called when the reference count to the 313 * passed kobj goes to zero. 314 * 315 * This kobj is the 'main' kobject that EDAC PCI instances 316 * link to, and thus provide for proper nesting counts 317 */ 318static void edac_pci_release_main_kobj(struct kobject *kobj) 319{ 320 debugf0("%s() here to module_put(THIS_MODULE)\n", __func__); 321 322 kfree(kobj); 323 324 /* last reference to top EDAC PCI kobject has been removed, 325 * NOW release our ref count on the core module 326 */ 327 module_put(THIS_MODULE); 328} 329 330/* ktype struct for the EDAC PCI main kobj */ 331static struct kobj_type ktype_edac_pci_main_kobj = { 332 .release = edac_pci_release_main_kobj, 333 .sysfs_ops = &edac_pci_sysfs_ops, 334 .default_attrs = (struct attribute **)edac_pci_attr, 335}; 336 337/** 338 * edac_pci_main_kobj_setup() 339 * 340 * setup the sysfs for EDAC PCI attributes 341 * assumes edac_class has already been initialized 342 */ 343static int edac_pci_main_kobj_setup(void) 344{ 345 int err; 346 struct sysdev_class *edac_class; 347 348 debugf0("%s()\n", __func__); 349 350 /* check and count if we have already created the main kobject */ 351 if (atomic_inc_return(&edac_pci_sysfs_refcount) != 1) 352 return 0; 353 354 /* First time, so create the main kobject and its 355 * controls and atributes 356 */ 357 edac_class = edac_get_edac_class(); 358 if (edac_class == NULL) { 359 debugf1("%s() no edac_class\n", __func__); 360 err = -ENODEV; 361 goto decrement_count_fail; 362 } 363 364 /* Bump the reference count on this module to ensure the 365 * modules isn't unloaded until we deconstruct the top 366 * level main kobj for EDAC PCI 367 */ 368 if (!try_module_get(THIS_MODULE)) { 369 debugf1("%s() try_module_get() failed\n", __func__); 370 err = -ENODEV; 371 goto decrement_count_fail; 372 } 373 374 edac_pci_top_main_kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL); 375 if (!edac_pci_top_main_kobj) { 376 debugf1("Failed to allocate\n"); 377 err = -ENOMEM; 378 goto kzalloc_fail; 379 } 380 381 /* Instanstiate the pci object */ 382 err = kobject_init_and_add(edac_pci_top_main_kobj, 383 &ktype_edac_pci_main_kobj, 384 &edac_class->kset.kobj, "pci"); 385 if (err) { 386 debugf1("Failed to register '.../edac/pci'\n"); 387 goto kobject_init_and_add_fail; 388 } 389 390 /* At this point, to 'release' the top level kobject 391 * for EDAC PCI, then edac_pci_main_kobj_teardown() 392 * must be used, for resources to be cleaned up properly 393 */ 394 kobject_uevent(edac_pci_top_main_kobj, KOBJ_ADD); 395 debugf1("Registered '.../edac/pci' kobject\n"); 396 397 return 0; 398 399 /* Error unwind statck */ 400kobject_init_and_add_fail: 401 kfree(edac_pci_top_main_kobj); 402 403kzalloc_fail: 404 module_put(THIS_MODULE); 405 406decrement_count_fail: 407 /* if are on this error exit, nothing to tear down */ 408 atomic_dec(&edac_pci_sysfs_refcount); 409 410 return err; 411} 412 413/* 414 * edac_pci_main_kobj_teardown() 415 * 416 * if no longer linked (needed) remove the top level EDAC PCI 417 * kobject with its controls and attributes 418 */ 419static void edac_pci_main_kobj_teardown(void) 420{ 421 debugf0("%s()\n", __func__); 422 423 /* Decrement the count and only if no more controller instances 424 * are connected perform the unregisteration of the top level 425 * main kobj 426 */ 427 if (atomic_dec_return(&edac_pci_sysfs_refcount) == 0) { 428 debugf0("%s() called kobject_put on main kobj\n", 429 __func__); 430 kobject_put(edac_pci_top_main_kobj); 431 } 432} 433 434/* 435 * 436 * edac_pci_create_sysfs 437 * 438 * Create the controls/attributes for the specified EDAC PCI device 439 */ 440int edac_pci_create_sysfs(struct edac_pci_ctl_info *pci) 441{ 442 int err; 443 struct kobject *edac_kobj = &pci->kobj; 444 445 debugf0("%s() idx=%d\n", __func__, pci->pci_idx); 446 447 /* create the top main EDAC PCI kobject, IF needed */ 448 err = edac_pci_main_kobj_setup(); 449 if (err) 450 return err; 451 452 /* Create this instance's kobject under the MAIN kobject */ 453 err = edac_pci_create_instance_kobj(pci, pci->pci_idx); 454 if (err) 455 goto unregister_cleanup; 456 457 err = sysfs_create_link(edac_kobj, &pci->dev->kobj, EDAC_PCI_SYMLINK); 458 if (err) { 459 debugf0("%s() sysfs_create_link() returned err= %d\n", 460 __func__, err); 461 goto symlink_fail; 462 } 463 464 return 0; 465 466 /* Error unwind stack */ 467symlink_fail: 468 edac_pci_unregister_sysfs_instance_kobj(pci); 469 470unregister_cleanup: 471 edac_pci_main_kobj_teardown(); 472 473 return err; 474} 475 476/* 477 * edac_pci_remove_sysfs 478 * 479 * remove the controls and attributes for this EDAC PCI device 480 */ 481void edac_pci_remove_sysfs(struct edac_pci_ctl_info *pci) 482{ 483 debugf0("%s() index=%d\n", __func__, pci->pci_idx); 484 485 /* Remove the symlink */ 486 sysfs_remove_link(&pci->kobj, EDAC_PCI_SYMLINK); 487 488 /* remove this PCI instance's sysfs entries */ 489 edac_pci_unregister_sysfs_instance_kobj(pci); 490 491 /* Call the main unregister function, which will determine 492 * if this 'pci' is the last instance. 493 * If it is, the main kobject will be unregistered as a result 494 */ 495 debugf0("%s() calling edac_pci_main_kobj_teardown()\n", __func__); 496 edac_pci_main_kobj_teardown(); 497} 498 499/************************ PCI error handling *************************/ 500static u16 get_pci_parity_status(struct pci_dev *dev, int secondary) 501{ 502 int where; 503 u16 status; 504 505 where = secondary ? PCI_SEC_STATUS : PCI_STATUS; 506 pci_read_config_word(dev, where, &status); 507 508 /* If we get back 0xFFFF then we must suspect that the card has been 509 * pulled but the Linux PCI layer has not yet finished cleaning up. 510 * We don't want to report on such devices 511 */ 512 513 if (status == 0xFFFF) { 514 u32 sanity; 515 516 pci_read_config_dword(dev, 0, &sanity); 517 518 if (sanity == 0xFFFFFFFF) 519 return 0; 520 } 521 522 status &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR | 523 PCI_STATUS_PARITY; 524 525 if (status) 526 /* reset only the bits we are interested in */ 527 pci_write_config_word(dev, where, status); 528 529 return status; 530} 531 532 533/* Clear any PCI parity errors logged by this device. */ 534static void edac_pci_dev_parity_clear(struct pci_dev *dev) 535{ 536 u8 header_type; 537 538 get_pci_parity_status(dev, 0); 539 540 /* read the device TYPE, looking for bridges */ 541 pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); 542 543 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) 544 get_pci_parity_status(dev, 1); 545} 546 547/* 548 * PCI Parity polling 549 * 550 * Fucntion to retrieve the current parity status 551 * and decode it 552 * 553 */ 554static void edac_pci_dev_parity_test(struct pci_dev *dev) 555{ 556 unsigned long flags; 557 u16 status; 558 u8 header_type; 559 560 /* stop any interrupts until we can acquire the status */ 561 local_irq_save(flags); 562 563 /* read the STATUS register on this device */ 564 status = get_pci_parity_status(dev, 0); 565 566 /* read the device TYPE, looking for bridges */ 567 pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); 568 569 local_irq_restore(flags); 570 571 debugf4("PCI STATUS= 0x%04x %s\n", status, dev_name(&dev->dev)); 572 573 /* check the status reg for errors on boards NOT marked as broken 574 * if broken, we cannot trust any of the status bits 575 */ 576 if (status && !dev->broken_parity_status) { 577 if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) { 578 edac_printk(KERN_CRIT, EDAC_PCI, 579 "Signaled System Error on %s\n", 580 pci_name(dev)); 581 atomic_inc(&pci_nonparity_count); 582 } 583 584 if (status & (PCI_STATUS_PARITY)) { 585 edac_printk(KERN_CRIT, EDAC_PCI, 586 "Master Data Parity Error on %s\n", 587 pci_name(dev)); 588 589 atomic_inc(&pci_parity_count); 590 } 591 592 if (status & (PCI_STATUS_DETECTED_PARITY)) { 593 edac_printk(KERN_CRIT, EDAC_PCI, 594 "Detected Parity Error on %s\n", 595 pci_name(dev)); 596 597 atomic_inc(&pci_parity_count); 598 } 599 } 600 601 602 debugf4("PCI HEADER TYPE= 0x%02x %s\n", header_type, dev_name(&dev->dev)); 603 604 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { 605 /* On bridges, need to examine secondary status register */ 606 status = get_pci_parity_status(dev, 1); 607 608 debugf4("PCI SEC_STATUS= 0x%04x %s\n", status, dev_name(&dev->dev)); 609 610 /* check the secondary status reg for errors, 611 * on NOT broken boards 612 */ 613 if (status && !dev->broken_parity_status) { 614 if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) { 615 edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " 616 "Signaled System Error on %s\n", 617 pci_name(dev)); 618 atomic_inc(&pci_nonparity_count); 619 } 620 621 if (status & (PCI_STATUS_PARITY)) { 622 edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " 623 "Master Data Parity Error on " 624 "%s\n", pci_name(dev)); 625 626 atomic_inc(&pci_parity_count); 627 } 628 629 if (status & (PCI_STATUS_DETECTED_PARITY)) { 630 edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " 631 "Detected Parity Error on %s\n", 632 pci_name(dev)); 633 634 atomic_inc(&pci_parity_count); 635 } 636 } 637 } 638} 639 640/* reduce some complexity in definition of the iterator */ 641typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev); 642 643/* 644 * pci_dev parity list iterator 645 * Scan the PCI device list for one pass, looking for SERRORs 646 * Master Parity ERRORS or Parity ERRORs on primary or secondary devices 647 */ 648static inline void edac_pci_dev_parity_iterator(pci_parity_check_fn_t fn) 649{ 650 struct pci_dev *dev = NULL; 651 652 /* request for kernel access to the next PCI device, if any, 653 * and while we are looking at it have its reference count 654 * bumped until we are done with it 655 */ 656 while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { 657 fn(dev); 658 } 659} 660 661/* 662 * edac_pci_do_parity_check 663 * 664 * performs the actual PCI parity check operation 665 */ 666void edac_pci_do_parity_check(void) 667{ 668 int before_count; 669 670 debugf3("%s()\n", __func__); 671 672 /* if policy has PCI check off, leave now */ 673 if (!check_pci_errors) 674 return; 675 676 before_count = atomic_read(&pci_parity_count); 677 678 /* scan all PCI devices looking for a Parity Error on devices and 679 * bridges. 680 * The iterator calls pci_get_device() which might sleep, thus 681 * we cannot disable interrupts in this scan. 682 */ 683 edac_pci_dev_parity_iterator(edac_pci_dev_parity_test); 684 685 /* Only if operator has selected panic on PCI Error */ 686 if (edac_pci_get_panic_on_pe()) { 687 /* If the count is different 'after' from 'before' */ 688 if (before_count != atomic_read(&pci_parity_count)) 689 panic("EDAC: PCI Parity Error"); 690 } 691} 692 693/* 694 * edac_pci_clear_parity_errors 695 * 696 * function to perform an iteration over the PCI devices 697 * and clearn their current status 698 */ 699void edac_pci_clear_parity_errors(void) 700{ 701 /* Clear any PCI bus parity errors that devices initially have logged 702 * in their registers. 703 */ 704 edac_pci_dev_parity_iterator(edac_pci_dev_parity_clear); 705} 706 707/* 708 * edac_pci_handle_pe 709 * 710 * Called to handle a PARITY ERROR event 711 */ 712void edac_pci_handle_pe(struct edac_pci_ctl_info *pci, const char *msg) 713{ 714 715 /* global PE counter incremented by edac_pci_do_parity_check() */ 716 atomic_inc(&pci->counters.pe_count); 717 718 if (edac_pci_get_log_pe()) 719 edac_pci_printk(pci, KERN_WARNING, 720 "Parity Error ctl: %s %d: %s\n", 721 pci->ctl_name, pci->pci_idx, msg); 722 723 /* 724 * poke all PCI devices and see which one is the troublemaker 725 * panic() is called if set 726 */ 727 edac_pci_do_parity_check(); 728} 729EXPORT_SYMBOL_GPL(edac_pci_handle_pe); 730 731 732/* 733 * edac_pci_handle_npe 734 * 735 * Called to handle a NON-PARITY ERROR event 736 */ 737void edac_pci_handle_npe(struct edac_pci_ctl_info *pci, const char *msg) 738{ 739 740 /* global NPE counter incremented by edac_pci_do_parity_check() */ 741 atomic_inc(&pci->counters.npe_count); 742 743 if (edac_pci_get_log_npe()) 744 edac_pci_printk(pci, KERN_WARNING, 745 "Non-Parity Error ctl: %s %d: %s\n", 746 pci->ctl_name, pci->pci_idx, msg); 747 748 /* 749 * poke all PCI devices and see which one is the troublemaker 750 * panic() is called if set 751 */ 752 edac_pci_do_parity_check(); 753} 754EXPORT_SYMBOL_GPL(edac_pci_handle_npe); 755 756/* 757 * Define the PCI parameter to the module 758 */ 759module_param(check_pci_errors, int, 0644); 760MODULE_PARM_DESC(check_pci_errors, 761 "Check for PCI bus parity errors: 0=off 1=on"); 762module_param(edac_pci_panic_on_pe, int, 0644); 763MODULE_PARM_DESC(edac_pci_panic_on_pe, 764 "Panic on PCI Bus Parity error: 0=off 1=on"); 765 766#endif /* CONFIG_PCI */ 767