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/edac.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_subsys has already been initialized 342 */ 343static int edac_pci_main_kobj_setup(void) 344{ 345 int err; 346 struct bus_type *edac_subsys; 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 attributes 356 */ 357 edac_subsys = edac_get_sysfs_subsys(); 358 if (edac_subsys == NULL) { 359 debugf1("%s() no edac_subsys\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 mod_get_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_subsys->dev_root->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 406mod_get_fail: 407 edac_put_sysfs_subsys(); 408 409decrement_count_fail: 410 /* if are on this error exit, nothing to tear down */ 411 atomic_dec(&edac_pci_sysfs_refcount); 412 413 return err; 414} 415 416/* 417 * edac_pci_main_kobj_teardown() 418 * 419 * if no longer linked (needed) remove the top level EDAC PCI 420 * kobject with its controls and attributes 421 */ 422static void edac_pci_main_kobj_teardown(void) 423{ 424 debugf0("%s()\n", __func__); 425 426 /* Decrement the count and only if no more controller instances 427 * are connected perform the unregisteration of the top level 428 * main kobj 429 */ 430 if (atomic_dec_return(&edac_pci_sysfs_refcount) == 0) { 431 debugf0("%s() called kobject_put on main kobj\n", 432 __func__); 433 kobject_put(edac_pci_top_main_kobj); 434 } 435 edac_put_sysfs_subsys(); 436} 437 438/* 439 * 440 * edac_pci_create_sysfs 441 * 442 * Create the controls/attributes for the specified EDAC PCI device 443 */ 444int edac_pci_create_sysfs(struct edac_pci_ctl_info *pci) 445{ 446 int err; 447 struct kobject *edac_kobj = &pci->kobj; 448 449 debugf0("%s() idx=%d\n", __func__, pci->pci_idx); 450 451 /* create the top main EDAC PCI kobject, IF needed */ 452 err = edac_pci_main_kobj_setup(); 453 if (err) 454 return err; 455 456 /* Create this instance's kobject under the MAIN kobject */ 457 err = edac_pci_create_instance_kobj(pci, pci->pci_idx); 458 if (err) 459 goto unregister_cleanup; 460 461 err = sysfs_create_link(edac_kobj, &pci->dev->kobj, EDAC_PCI_SYMLINK); 462 if (err) { 463 debugf0("%s() sysfs_create_link() returned err= %d\n", 464 __func__, err); 465 goto symlink_fail; 466 } 467 468 return 0; 469 470 /* Error unwind stack */ 471symlink_fail: 472 edac_pci_unregister_sysfs_instance_kobj(pci); 473 474unregister_cleanup: 475 edac_pci_main_kobj_teardown(); 476 477 return err; 478} 479 480/* 481 * edac_pci_remove_sysfs 482 * 483 * remove the controls and attributes for this EDAC PCI device 484 */ 485void edac_pci_remove_sysfs(struct edac_pci_ctl_info *pci) 486{ 487 debugf0("%s() index=%d\n", __func__, pci->pci_idx); 488 489 /* Remove the symlink */ 490 sysfs_remove_link(&pci->kobj, EDAC_PCI_SYMLINK); 491 492 /* remove this PCI instance's sysfs entries */ 493 edac_pci_unregister_sysfs_instance_kobj(pci); 494 495 /* Call the main unregister function, which will determine 496 * if this 'pci' is the last instance. 497 * If it is, the main kobject will be unregistered as a result 498 */ 499 debugf0("%s() calling edac_pci_main_kobj_teardown()\n", __func__); 500 edac_pci_main_kobj_teardown(); 501} 502 503/************************ PCI error handling *************************/ 504static u16 get_pci_parity_status(struct pci_dev *dev, int secondary) 505{ 506 int where; 507 u16 status; 508 509 where = secondary ? PCI_SEC_STATUS : PCI_STATUS; 510 pci_read_config_word(dev, where, &status); 511 512 /* If we get back 0xFFFF then we must suspect that the card has been 513 * pulled but the Linux PCI layer has not yet finished cleaning up. 514 * We don't want to report on such devices 515 */ 516 517 if (status == 0xFFFF) { 518 u32 sanity; 519 520 pci_read_config_dword(dev, 0, &sanity); 521 522 if (sanity == 0xFFFFFFFF) 523 return 0; 524 } 525 526 status &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR | 527 PCI_STATUS_PARITY; 528 529 if (status) 530 /* reset only the bits we are interested in */ 531 pci_write_config_word(dev, where, status); 532 533 return status; 534} 535 536 537/* Clear any PCI parity errors logged by this device. */ 538static void edac_pci_dev_parity_clear(struct pci_dev *dev) 539{ 540 u8 header_type; 541 542 get_pci_parity_status(dev, 0); 543 544 /* read the device TYPE, looking for bridges */ 545 pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); 546 547 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) 548 get_pci_parity_status(dev, 1); 549} 550 551/* 552 * PCI Parity polling 553 * 554 * Function to retrieve the current parity status 555 * and decode it 556 * 557 */ 558static void edac_pci_dev_parity_test(struct pci_dev *dev) 559{ 560 unsigned long flags; 561 u16 status; 562 u8 header_type; 563 564 /* stop any interrupts until we can acquire the status */ 565 local_irq_save(flags); 566 567 /* read the STATUS register on this device */ 568 status = get_pci_parity_status(dev, 0); 569 570 /* read the device TYPE, looking for bridges */ 571 pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); 572 573 local_irq_restore(flags); 574 575 debugf4("PCI STATUS= 0x%04x %s\n", status, dev_name(&dev->dev)); 576 577 /* check the status reg for errors on boards NOT marked as broken 578 * if broken, we cannot trust any of the status bits 579 */ 580 if (status && !dev->broken_parity_status) { 581 if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) { 582 edac_printk(KERN_CRIT, EDAC_PCI, 583 "Signaled System Error on %s\n", 584 pci_name(dev)); 585 atomic_inc(&pci_nonparity_count); 586 } 587 588 if (status & (PCI_STATUS_PARITY)) { 589 edac_printk(KERN_CRIT, EDAC_PCI, 590 "Master Data Parity Error on %s\n", 591 pci_name(dev)); 592 593 atomic_inc(&pci_parity_count); 594 } 595 596 if (status & (PCI_STATUS_DETECTED_PARITY)) { 597 edac_printk(KERN_CRIT, EDAC_PCI, 598 "Detected Parity Error on %s\n", 599 pci_name(dev)); 600 601 atomic_inc(&pci_parity_count); 602 } 603 } 604 605 606 debugf4("PCI HEADER TYPE= 0x%02x %s\n", header_type, dev_name(&dev->dev)); 607 608 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { 609 /* On bridges, need to examine secondary status register */ 610 status = get_pci_parity_status(dev, 1); 611 612 debugf4("PCI SEC_STATUS= 0x%04x %s\n", status, dev_name(&dev->dev)); 613 614 /* check the secondary status reg for errors, 615 * on NOT broken boards 616 */ 617 if (status && !dev->broken_parity_status) { 618 if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) { 619 edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " 620 "Signaled System Error on %s\n", 621 pci_name(dev)); 622 atomic_inc(&pci_nonparity_count); 623 } 624 625 if (status & (PCI_STATUS_PARITY)) { 626 edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " 627 "Master Data Parity Error on " 628 "%s\n", pci_name(dev)); 629 630 atomic_inc(&pci_parity_count); 631 } 632 633 if (status & (PCI_STATUS_DETECTED_PARITY)) { 634 edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " 635 "Detected Parity Error on %s\n", 636 pci_name(dev)); 637 638 atomic_inc(&pci_parity_count); 639 } 640 } 641 } 642} 643 644/* reduce some complexity in definition of the iterator */ 645typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev); 646 647/* 648 * pci_dev parity list iterator 649 * Scan the PCI device list for one pass, looking for SERRORs 650 * Master Parity ERRORS or Parity ERRORs on primary or secondary devices 651 */ 652static inline void edac_pci_dev_parity_iterator(pci_parity_check_fn_t fn) 653{ 654 struct pci_dev *dev = NULL; 655 656 /* request for kernel access to the next PCI device, if any, 657 * and while we are looking at it have its reference count 658 * bumped until we are done with it 659 */ 660 while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { 661 fn(dev); 662 } 663} 664 665/* 666 * edac_pci_do_parity_check 667 * 668 * performs the actual PCI parity check operation 669 */ 670void edac_pci_do_parity_check(void) 671{ 672 int before_count; 673 674 debugf3("%s()\n", __func__); 675 676 /* if policy has PCI check off, leave now */ 677 if (!check_pci_errors) 678 return; 679 680 before_count = atomic_read(&pci_parity_count); 681 682 /* scan all PCI devices looking for a Parity Error on devices and 683 * bridges. 684 * The iterator calls pci_get_device() which might sleep, thus 685 * we cannot disable interrupts in this scan. 686 */ 687 edac_pci_dev_parity_iterator(edac_pci_dev_parity_test); 688 689 /* Only if operator has selected panic on PCI Error */ 690 if (edac_pci_get_panic_on_pe()) { 691 /* If the count is different 'after' from 'before' */ 692 if (before_count != atomic_read(&pci_parity_count)) 693 panic("EDAC: PCI Parity Error"); 694 } 695} 696 697/* 698 * edac_pci_clear_parity_errors 699 * 700 * function to perform an iteration over the PCI devices 701 * and clearn their current status 702 */ 703void edac_pci_clear_parity_errors(void) 704{ 705 /* Clear any PCI bus parity errors that devices initially have logged 706 * in their registers. 707 */ 708 edac_pci_dev_parity_iterator(edac_pci_dev_parity_clear); 709} 710 711/* 712 * edac_pci_handle_pe 713 * 714 * Called to handle a PARITY ERROR event 715 */ 716void edac_pci_handle_pe(struct edac_pci_ctl_info *pci, const char *msg) 717{ 718 719 /* global PE counter incremented by edac_pci_do_parity_check() */ 720 atomic_inc(&pci->counters.pe_count); 721 722 if (edac_pci_get_log_pe()) 723 edac_pci_printk(pci, KERN_WARNING, 724 "Parity Error ctl: %s %d: %s\n", 725 pci->ctl_name, pci->pci_idx, msg); 726 727 /* 728 * poke all PCI devices and see which one is the troublemaker 729 * panic() is called if set 730 */ 731 edac_pci_do_parity_check(); 732} 733EXPORT_SYMBOL_GPL(edac_pci_handle_pe); 734 735 736/* 737 * edac_pci_handle_npe 738 * 739 * Called to handle a NON-PARITY ERROR event 740 */ 741void edac_pci_handle_npe(struct edac_pci_ctl_info *pci, const char *msg) 742{ 743 744 /* global NPE counter incremented by edac_pci_do_parity_check() */ 745 atomic_inc(&pci->counters.npe_count); 746 747 if (edac_pci_get_log_npe()) 748 edac_pci_printk(pci, KERN_WARNING, 749 "Non-Parity Error ctl: %s %d: %s\n", 750 pci->ctl_name, pci->pci_idx, msg); 751 752 /* 753 * poke all PCI devices and see which one is the troublemaker 754 * panic() is called if set 755 */ 756 edac_pci_do_parity_check(); 757} 758EXPORT_SYMBOL_GPL(edac_pci_handle_npe); 759 760/* 761 * Define the PCI parameter to the module 762 */ 763module_param(check_pci_errors, int, 0644); 764MODULE_PARM_DESC(check_pci_errors, 765 "Check for PCI bus parity errors: 0=off 1=on"); 766module_param(edac_pci_panic_on_pe, int, 0644); 767MODULE_PARM_DESC(edac_pci_panic_on_pe, 768 "Panic on PCI Bus Parity error: 0=off 1=on"); 769 770#endif /* CONFIG_PCI */ 771