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 edac_dbg(0, "\n"); 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 edac_dbg(0, "\n"); 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 edac_dbg(2, "failed to register instance pci%d\n", idx); 181 kobject_put(edac_pci_top_main_kobj); 182 goto error_out; 183 } 184 185 kobject_uevent(&pci->kobj, KOBJ_ADD); 186 edac_dbg(1, "Register instance 'pci%d' kobject\n", idx); 187 188 return 0; 189 190 /* Error unwind statck */ 191error_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 */ 200static void edac_pci_unregister_sysfs_instance_kobj( 201 struct edac_pci_ctl_info *pci) 202{ 203 edac_dbg(0, "\n"); 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 */ 217static ssize_t edac_pci_int_show(void *ptr, char *buffer) 218{ 219 int *value = ptr; 220 return sprintf(buffer, "%d\n", *value); 221} 222 223static 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 233struct 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 */ 241static 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 252static 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->store) 260 return edac_pci_dev->store(edac_pci_dev->value, buffer, count); 261 return -EIO; 262} 263 264static const 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) \ 270static 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) \ 278static 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 */ 286EDAC_PCI_ATTR(check_pci_errors, S_IRUGO | S_IWUSR, edac_pci_int_show, 287 edac_pci_int_store); 288EDAC_PCI_ATTR(edac_pci_log_pe, S_IRUGO | S_IWUSR, edac_pci_int_show, 289 edac_pci_int_store); 290EDAC_PCI_ATTR(edac_pci_log_npe, S_IRUGO | S_IWUSR, edac_pci_int_show, 291 edac_pci_int_store); 292EDAC_PCI_ATTR(edac_pci_panic_on_pe, S_IRUGO | S_IWUSR, edac_pci_int_show, 293 edac_pci_int_store); 294EDAC_PCI_ATTR(pci_parity_count, S_IRUGO, edac_pci_int_show, NULL); 295EDAC_PCI_ATTR(pci_nonparity_count, S_IRUGO, edac_pci_int_show, NULL); 296 297/* Base Attributes of the memory ECC object */ 298static 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 */ 317static void edac_pci_release_main_kobj(struct kobject *kobj) 318{ 319 edac_dbg(0, "here to module_put(THIS_MODULE)\n"); 320 321 kfree(kobj); 322 323 /* last reference to top EDAC PCI kobject has been removed, 324 * NOW release our ref count on the core module 325 */ 326 module_put(THIS_MODULE); 327} 328 329/* ktype struct for the EDAC PCI main kobj */ 330static struct kobj_type ktype_edac_pci_main_kobj = { 331 .release = edac_pci_release_main_kobj, 332 .sysfs_ops = &edac_pci_sysfs_ops, 333 .default_attrs = (struct attribute **)edac_pci_attr, 334}; 335 336/** 337 * edac_pci_main_kobj_setup() 338 * 339 * setup the sysfs for EDAC PCI attributes 340 * assumes edac_subsys has already been initialized 341 */ 342static int edac_pci_main_kobj_setup(void) 343{ 344 int err; 345 struct bus_type *edac_subsys; 346 347 edac_dbg(0, "\n"); 348 349 /* check and count if we have already created the main kobject */ 350 if (atomic_inc_return(&edac_pci_sysfs_refcount) != 1) 351 return 0; 352 353 /* First time, so create the main kobject and its 354 * controls and attributes 355 */ 356 edac_subsys = edac_get_sysfs_subsys(); 357 if (edac_subsys == NULL) { 358 edac_dbg(1, "no edac_subsys\n"); 359 err = -ENODEV; 360 goto decrement_count_fail; 361 } 362 363 /* Bump the reference count on this module to ensure the 364 * modules isn't unloaded until we deconstruct the top 365 * level main kobj for EDAC PCI 366 */ 367 if (!try_module_get(THIS_MODULE)) { 368 edac_dbg(1, "try_module_get() failed\n"); 369 err = -ENODEV; 370 goto mod_get_fail; 371 } 372 373 edac_pci_top_main_kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL); 374 if (!edac_pci_top_main_kobj) { 375 edac_dbg(1, "Failed to allocate\n"); 376 err = -ENOMEM; 377 goto kzalloc_fail; 378 } 379 380 /* Instanstiate the pci object */ 381 err = kobject_init_and_add(edac_pci_top_main_kobj, 382 &ktype_edac_pci_main_kobj, 383 &edac_subsys->dev_root->kobj, "pci"); 384 if (err) { 385 edac_dbg(1, "Failed to register '.../edac/pci'\n"); 386 goto kobject_init_and_add_fail; 387 } 388 389 /* At this point, to 'release' the top level kobject 390 * for EDAC PCI, then edac_pci_main_kobj_teardown() 391 * must be used, for resources to be cleaned up properly 392 */ 393 kobject_uevent(edac_pci_top_main_kobj, KOBJ_ADD); 394 edac_dbg(1, "Registered '.../edac/pci' kobject\n"); 395 396 return 0; 397 398 /* Error unwind statck */ 399kobject_init_and_add_fail: 400 kfree(edac_pci_top_main_kobj); 401 402kzalloc_fail: 403 module_put(THIS_MODULE); 404 405mod_get_fail: 406 edac_put_sysfs_subsys(); 407 408decrement_count_fail: 409 /* if are on this error exit, nothing to tear down */ 410 atomic_dec(&edac_pci_sysfs_refcount); 411 412 return err; 413} 414 415/* 416 * edac_pci_main_kobj_teardown() 417 * 418 * if no longer linked (needed) remove the top level EDAC PCI 419 * kobject with its controls and attributes 420 */ 421static void edac_pci_main_kobj_teardown(void) 422{ 423 edac_dbg(0, "\n"); 424 425 /* Decrement the count and only if no more controller instances 426 * are connected perform the unregisteration of the top level 427 * main kobj 428 */ 429 if (atomic_dec_return(&edac_pci_sysfs_refcount) == 0) { 430 edac_dbg(0, "called kobject_put on main kobj\n"); 431 kobject_put(edac_pci_top_main_kobj); 432 edac_put_sysfs_subsys(); 433 } 434} 435 436/* 437 * 438 * edac_pci_create_sysfs 439 * 440 * Create the controls/attributes for the specified EDAC PCI device 441 */ 442int edac_pci_create_sysfs(struct edac_pci_ctl_info *pci) 443{ 444 int err; 445 struct kobject *edac_kobj = &pci->kobj; 446 447 edac_dbg(0, "idx=%d\n", pci->pci_idx); 448 449 /* create the top main EDAC PCI kobject, IF needed */ 450 err = edac_pci_main_kobj_setup(); 451 if (err) 452 return err; 453 454 /* Create this instance's kobject under the MAIN kobject */ 455 err = edac_pci_create_instance_kobj(pci, pci->pci_idx); 456 if (err) 457 goto unregister_cleanup; 458 459 err = sysfs_create_link(edac_kobj, &pci->dev->kobj, EDAC_PCI_SYMLINK); 460 if (err) { 461 edac_dbg(0, "sysfs_create_link() returned err= %d\n", err); 462 goto symlink_fail; 463 } 464 465 return 0; 466 467 /* Error unwind stack */ 468symlink_fail: 469 edac_pci_unregister_sysfs_instance_kobj(pci); 470 471unregister_cleanup: 472 edac_pci_main_kobj_teardown(); 473 474 return err; 475} 476 477/* 478 * edac_pci_remove_sysfs 479 * 480 * remove the controls and attributes for this EDAC PCI device 481 */ 482void edac_pci_remove_sysfs(struct edac_pci_ctl_info *pci) 483{ 484 edac_dbg(0, "index=%d\n", pci->pci_idx); 485 486 /* Remove the symlink */ 487 sysfs_remove_link(&pci->kobj, EDAC_PCI_SYMLINK); 488 489 /* remove this PCI instance's sysfs entries */ 490 edac_pci_unregister_sysfs_instance_kobj(pci); 491 492 /* Call the main unregister function, which will determine 493 * if this 'pci' is the last instance. 494 * If it is, the main kobject will be unregistered as a result 495 */ 496 edac_dbg(0, "calling edac_pci_main_kobj_teardown()\n"); 497 edac_pci_main_kobj_teardown(); 498} 499 500/************************ PCI error handling *************************/ 501static u16 get_pci_parity_status(struct pci_dev *dev, int secondary) 502{ 503 int where; 504 u16 status; 505 506 where = secondary ? PCI_SEC_STATUS : PCI_STATUS; 507 pci_read_config_word(dev, where, &status); 508 509 /* If we get back 0xFFFF then we must suspect that the card has been 510 * pulled but the Linux PCI layer has not yet finished cleaning up. 511 * We don't want to report on such devices 512 */ 513 514 if (status == 0xFFFF) { 515 u32 sanity; 516 517 pci_read_config_dword(dev, 0, &sanity); 518 519 if (sanity == 0xFFFFFFFF) 520 return 0; 521 } 522 523 status &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR | 524 PCI_STATUS_PARITY; 525 526 if (status) 527 /* reset only the bits we are interested in */ 528 pci_write_config_word(dev, where, status); 529 530 return status; 531} 532 533 534/* Clear any PCI parity errors logged by this device. */ 535static void edac_pci_dev_parity_clear(struct pci_dev *dev) 536{ 537 u8 header_type; 538 539 get_pci_parity_status(dev, 0); 540 541 /* read the device TYPE, looking for bridges */ 542 pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); 543 544 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) 545 get_pci_parity_status(dev, 1); 546} 547 548/* 549 * PCI Parity polling 550 * 551 * Function to retrieve the current parity status 552 * and decode it 553 * 554 */ 555static void edac_pci_dev_parity_test(struct pci_dev *dev) 556{ 557 unsigned long flags; 558 u16 status; 559 u8 header_type; 560 561 /* stop any interrupts until we can acquire the status */ 562 local_irq_save(flags); 563 564 /* read the STATUS register on this device */ 565 status = get_pci_parity_status(dev, 0); 566 567 /* read the device TYPE, looking for bridges */ 568 pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); 569 570 local_irq_restore(flags); 571 572 edac_dbg(4, "PCI STATUS= 0x%04x %s\n", status, dev_name(&dev->dev)); 573 574 /* check the status reg for errors on boards NOT marked as broken 575 * if broken, we cannot trust any of the status bits 576 */ 577 if (status && !dev->broken_parity_status) { 578 if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) { 579 edac_printk(KERN_CRIT, EDAC_PCI, 580 "Signaled System Error on %s\n", 581 pci_name(dev)); 582 atomic_inc(&pci_nonparity_count); 583 } 584 585 if (status & (PCI_STATUS_PARITY)) { 586 edac_printk(KERN_CRIT, EDAC_PCI, 587 "Master Data Parity Error on %s\n", 588 pci_name(dev)); 589 590 atomic_inc(&pci_parity_count); 591 } 592 593 if (status & (PCI_STATUS_DETECTED_PARITY)) { 594 edac_printk(KERN_CRIT, EDAC_PCI, 595 "Detected Parity Error on %s\n", 596 pci_name(dev)); 597 598 atomic_inc(&pci_parity_count); 599 } 600 } 601 602 603 edac_dbg(4, "PCI HEADER TYPE= 0x%02x %s\n", 604 header_type, dev_name(&dev->dev)); 605 606 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { 607 /* On bridges, need to examine secondary status register */ 608 status = get_pci_parity_status(dev, 1); 609 610 edac_dbg(4, "PCI SEC_STATUS= 0x%04x %s\n", 611 status, dev_name(&dev->dev)); 612 613 /* check the secondary status reg for errors, 614 * on NOT broken boards 615 */ 616 if (status && !dev->broken_parity_status) { 617 if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) { 618 edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " 619 "Signaled System Error on %s\n", 620 pci_name(dev)); 621 atomic_inc(&pci_nonparity_count); 622 } 623 624 if (status & (PCI_STATUS_PARITY)) { 625 edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " 626 "Master Data Parity Error on " 627 "%s\n", pci_name(dev)); 628 629 atomic_inc(&pci_parity_count); 630 } 631 632 if (status & (PCI_STATUS_DETECTED_PARITY)) { 633 edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " 634 "Detected Parity Error on %s\n", 635 pci_name(dev)); 636 637 atomic_inc(&pci_parity_count); 638 } 639 } 640 } 641} 642 643/* reduce some complexity in definition of the iterator */ 644typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev); 645 646/* 647 * pci_dev parity list iterator 648 * 649 * Scan the PCI device list looking for SERRORs, Master Parity ERRORS or 650 * 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 for_each_pci_dev(dev) 657 fn(dev); 658} 659 660/* 661 * edac_pci_do_parity_check 662 * 663 * performs the actual PCI parity check operation 664 */ 665void edac_pci_do_parity_check(void) 666{ 667 int before_count; 668 669 edac_dbg(3, "\n"); 670 671 /* if policy has PCI check off, leave now */ 672 if (!check_pci_errors) 673 return; 674 675 before_count = atomic_read(&pci_parity_count); 676 677 /* scan all PCI devices looking for a Parity Error on devices and 678 * bridges. 679 * The iterator calls pci_get_device() which might sleep, thus 680 * we cannot disable interrupts in this scan. 681 */ 682 edac_pci_dev_parity_iterator(edac_pci_dev_parity_test); 683 684 /* Only if operator has selected panic on PCI Error */ 685 if (edac_pci_get_panic_on_pe()) { 686 /* If the count is different 'after' from 'before' */ 687 if (before_count != atomic_read(&pci_parity_count)) 688 panic("EDAC: PCI Parity Error"); 689 } 690} 691 692/* 693 * edac_pci_clear_parity_errors 694 * 695 * function to perform an iteration over the PCI devices 696 * and clearn their current status 697 */ 698void edac_pci_clear_parity_errors(void) 699{ 700 /* Clear any PCI bus parity errors that devices initially have logged 701 * in their registers. 702 */ 703 edac_pci_dev_parity_iterator(edac_pci_dev_parity_clear); 704} 705 706/* 707 * edac_pci_handle_pe 708 * 709 * Called to handle a PARITY ERROR event 710 */ 711void edac_pci_handle_pe(struct edac_pci_ctl_info *pci, const char *msg) 712{ 713 714 /* global PE counter incremented by edac_pci_do_parity_check() */ 715 atomic_inc(&pci->counters.pe_count); 716 717 if (edac_pci_get_log_pe()) 718 edac_pci_printk(pci, KERN_WARNING, 719 "Parity Error ctl: %s %d: %s\n", 720 pci->ctl_name, pci->pci_idx, msg); 721 722 /* 723 * poke all PCI devices and see which one is the troublemaker 724 * panic() is called if set 725 */ 726 edac_pci_do_parity_check(); 727} 728EXPORT_SYMBOL_GPL(edac_pci_handle_pe); 729 730 731/* 732 * edac_pci_handle_npe 733 * 734 * Called to handle a NON-PARITY ERROR event 735 */ 736void edac_pci_handle_npe(struct edac_pci_ctl_info *pci, const char *msg) 737{ 738 739 /* global NPE counter incremented by edac_pci_do_parity_check() */ 740 atomic_inc(&pci->counters.npe_count); 741 742 if (edac_pci_get_log_npe()) 743 edac_pci_printk(pci, KERN_WARNING, 744 "Non-Parity Error ctl: %s %d: %s\n", 745 pci->ctl_name, pci->pci_idx, msg); 746 747 /* 748 * poke all PCI devices and see which one is the troublemaker 749 * panic() is called if set 750 */ 751 edac_pci_do_parity_check(); 752} 753EXPORT_SYMBOL_GPL(edac_pci_handle_npe); 754 755/* 756 * Define the PCI parameter to the module 757 */ 758module_param(check_pci_errors, int, 0644); 759MODULE_PARM_DESC(check_pci_errors, 760 "Check for PCI bus parity errors: 0=off 1=on"); 761module_param(edac_pci_panic_on_pe, int, 0644); 762MODULE_PARM_DESC(edac_pci_panic_on_pe, 763 "Panic on PCI Bus Parity error: 0=off 1=on"); 764 765#endif /* CONFIG_PCI */ 766