linux/drivers/edac/edac_device.c
<<
>>
Prefs
   1
   2/*
   3 * edac_device.c
   4 * (C) 2007 www.douglaskthompson.com
   5 *
   6 * This file may be distributed under the terms of the
   7 * GNU General Public License.
   8 *
   9 * Written by Doug Thompson <norsk5@xmission.com>
  10 *
  11 * edac_device API implementation
  12 * 19 Jan 2007
  13 */
  14
  15#include <linux/module.h>
  16#include <linux/types.h>
  17#include <linux/smp.h>
  18#include <linux/init.h>
  19#include <linux/sysctl.h>
  20#include <linux/highmem.h>
  21#include <linux/timer.h>
  22#include <linux/slab.h>
  23#include <linux/jiffies.h>
  24#include <linux/spinlock.h>
  25#include <linux/list.h>
  26#include <linux/ctype.h>
  27#include <linux/workqueue.h>
  28#include <asm/uaccess.h>
  29#include <asm/page.h>
  30
  31#include "edac_core.h"
  32#include "edac_module.h"
  33
  34/* lock for the list: 'edac_device_list', manipulation of this list
  35 * is protected by the 'device_ctls_mutex' lock
  36 */
  37static DEFINE_MUTEX(device_ctls_mutex);
  38static LIST_HEAD(edac_device_list);
  39
  40#ifdef CONFIG_EDAC_DEBUG
  41static void edac_device_dump_device(struct edac_device_ctl_info *edac_dev)
  42{
  43        edac_dbg(3, "\tedac_dev = %p dev_idx=%d\n",
  44                 edac_dev, edac_dev->dev_idx);
  45        edac_dbg(4, "\tedac_dev->edac_check = %p\n", edac_dev->edac_check);
  46        edac_dbg(3, "\tdev = %p\n", edac_dev->dev);
  47        edac_dbg(3, "\tmod_name:ctl_name = %s:%s\n",
  48                 edac_dev->mod_name, edac_dev->ctl_name);
  49        edac_dbg(3, "\tpvt_info = %p\n\n", edac_dev->pvt_info);
  50}
  51#endif                          /* CONFIG_EDAC_DEBUG */
  52
  53
  54/*
  55 * edac_device_alloc_ctl_info()
  56 *      Allocate a new edac device control info structure
  57 *
  58 *      The control structure is allocated in complete chunk
  59 *      from the OS. It is in turn sub allocated to the
  60 *      various objects that compose the structure
  61 *
  62 *      The structure has a 'nr_instance' array within itself.
  63 *      Each instance represents a major component
  64 *              Example:  L1 cache and L2 cache are 2 instance components
  65 *
  66 *      Within each instance is an array of 'nr_blocks' blockoffsets
  67 */
  68struct edac_device_ctl_info *edac_device_alloc_ctl_info(
  69        unsigned sz_private,
  70        char *edac_device_name, unsigned nr_instances,
  71        char *edac_block_name, unsigned nr_blocks,
  72        unsigned offset_value,          /* zero, 1, or other based offset */
  73        struct edac_dev_sysfs_block_attribute *attrib_spec, unsigned nr_attrib,
  74        int device_index)
  75{
  76        struct edac_device_ctl_info *dev_ctl;
  77        struct edac_device_instance *dev_inst, *inst;
  78        struct edac_device_block *dev_blk, *blk_p, *blk;
  79        struct edac_dev_sysfs_block_attribute *dev_attrib, *attrib_p, *attrib;
  80        unsigned total_size;
  81        unsigned count;
  82        unsigned instance, block, attr;
  83        void *pvt, *p;
  84        int err;
  85
  86        edac_dbg(4, "instances=%d blocks=%d\n", nr_instances, nr_blocks);
  87
  88        /* Calculate the size of memory we need to allocate AND
  89         * determine the offsets of the various item arrays
  90         * (instance,block,attrib) from the start of an  allocated structure.
  91         * We want the alignment of each item  (instance,block,attrib)
  92         * to be at least as stringent as what the compiler would
  93         * provide if we could simply hardcode everything into a single struct.
  94         */
  95        p = NULL;
  96        dev_ctl = edac_align_ptr(&p, sizeof(*dev_ctl), 1);
  97
  98        /* Calc the 'end' offset past end of ONE ctl_info structure
  99         * which will become the start of the 'instance' array
 100         */
 101        dev_inst = edac_align_ptr(&p, sizeof(*dev_inst), nr_instances);
 102
 103        /* Calc the 'end' offset past the instance array within the ctl_info
 104         * which will become the start of the block array
 105         */
 106        count = nr_instances * nr_blocks;
 107        dev_blk = edac_align_ptr(&p, sizeof(*dev_blk), count);
 108
 109        /* Calc the 'end' offset past the dev_blk array
 110         * which will become the start of the attrib array, if any.
 111         */
 112        /* calc how many nr_attrib we need */
 113        if (nr_attrib > 0)
 114                count *= nr_attrib;
 115        dev_attrib = edac_align_ptr(&p, sizeof(*dev_attrib), count);
 116
 117        /* Calc the 'end' offset past the attributes array */
 118        pvt = edac_align_ptr(&p, sz_private, 1);
 119
 120        /* 'pvt' now points to where the private data area is.
 121         * At this point 'pvt' (like dev_inst,dev_blk and dev_attrib)
 122         * is baselined at ZERO
 123         */
 124        total_size = ((unsigned long)pvt) + sz_private;
 125
 126        /* Allocate the amount of memory for the set of control structures */
 127        dev_ctl = kzalloc(total_size, GFP_KERNEL);
 128        if (dev_ctl == NULL)
 129                return NULL;
 130
 131        /* Adjust pointers so they point within the actual memory we
 132         * just allocated rather than an imaginary chunk of memory
 133         * located at address 0.
 134         * 'dev_ctl' points to REAL memory, while the others are
 135         * ZERO based and thus need to be adjusted to point within
 136         * the allocated memory.
 137         */
 138        dev_inst = (struct edac_device_instance *)
 139                (((char *)dev_ctl) + ((unsigned long)dev_inst));
 140        dev_blk = (struct edac_device_block *)
 141                (((char *)dev_ctl) + ((unsigned long)dev_blk));
 142        dev_attrib = (struct edac_dev_sysfs_block_attribute *)
 143                (((char *)dev_ctl) + ((unsigned long)dev_attrib));
 144        pvt = sz_private ? (((char *)dev_ctl) + ((unsigned long)pvt)) : NULL;
 145
 146        /* Begin storing the information into the control info structure */
 147        dev_ctl->dev_idx = device_index;
 148        dev_ctl->nr_instances = nr_instances;
 149        dev_ctl->instances = dev_inst;
 150        dev_ctl->pvt_info = pvt;
 151
 152        /* Default logging of CEs and UEs */
 153        dev_ctl->log_ce = 1;
 154        dev_ctl->log_ue = 1;
 155
 156        /* Name of this edac device */
 157        snprintf(dev_ctl->name,sizeof(dev_ctl->name),"%s",edac_device_name);
 158
 159        edac_dbg(4, "edac_dev=%p next after end=%p\n",
 160                 dev_ctl, pvt + sz_private);
 161
 162        /* Initialize every Instance */
 163        for (instance = 0; instance < nr_instances; instance++) {
 164                inst = &dev_inst[instance];
 165                inst->ctl = dev_ctl;
 166                inst->nr_blocks = nr_blocks;
 167                blk_p = &dev_blk[instance * nr_blocks];
 168                inst->blocks = blk_p;
 169
 170                /* name of this instance */
 171                snprintf(inst->name, sizeof(inst->name),
 172                         "%s%u", edac_device_name, instance);
 173
 174                /* Initialize every block in each instance */
 175                for (block = 0; block < nr_blocks; block++) {
 176                        blk = &blk_p[block];
 177                        blk->instance = inst;
 178                        snprintf(blk->name, sizeof(blk->name),
 179                                 "%s%d", edac_block_name, block+offset_value);
 180
 181                        edac_dbg(4, "instance=%d inst_p=%p block=#%d block_p=%p name='%s'\n",
 182                                 instance, inst, block, blk, blk->name);
 183
 184                        /* if there are NO attributes OR no attribute pointer
 185                         * then continue on to next block iteration
 186                         */
 187                        if ((nr_attrib == 0) || (attrib_spec == NULL))
 188                                continue;
 189
 190                        /* setup the attribute array for this block */
 191                        blk->nr_attribs = nr_attrib;
 192                        attrib_p = &dev_attrib[block*nr_instances*nr_attrib];
 193                        blk->block_attributes = attrib_p;
 194
 195                        edac_dbg(4, "THIS BLOCK_ATTRIB=%p\n",
 196                                 blk->block_attributes);
 197
 198                        /* Initialize every user specified attribute in this
 199                         * block with the data the caller passed in
 200                         * Each block gets its own copy of pointers,
 201                         * and its unique 'value'
 202                         */
 203                        for (attr = 0; attr < nr_attrib; attr++) {
 204                                attrib = &attrib_p[attr];
 205
 206                                /* populate the unique per attrib
 207                                 * with the code pointers and info
 208                                 */
 209                                attrib->attr = attrib_spec[attr].attr;
 210                                attrib->show = attrib_spec[attr].show;
 211                                attrib->store = attrib_spec[attr].store;
 212
 213                                attrib->block = blk;    /* up link */
 214
 215                                edac_dbg(4, "alloc-attrib=%p attrib_name='%s' attrib-spec=%p spec-name=%s\n",
 216                                         attrib, attrib->attr.name,
 217                                         &attrib_spec[attr],
 218                                         attrib_spec[attr].attr.name
 219                                        );
 220                        }
 221                }
 222        }
 223
 224        /* Mark this instance as merely ALLOCATED */
 225        dev_ctl->op_state = OP_ALLOC;
 226
 227        /*
 228         * Initialize the 'root' kobj for the edac_device controller
 229         */
 230        err = edac_device_register_sysfs_main_kobj(dev_ctl);
 231        if (err) {
 232                kfree(dev_ctl);
 233                return NULL;
 234        }
 235
 236        /* at this point, the root kobj is valid, and in order to
 237         * 'free' the object, then the function:
 238         *      edac_device_unregister_sysfs_main_kobj() must be called
 239         * which will perform kobj unregistration and the actual free
 240         * will occur during the kobject callback operation
 241         */
 242
 243        return dev_ctl;
 244}
 245EXPORT_SYMBOL_GPL(edac_device_alloc_ctl_info);
 246
 247/*
 248 * edac_device_free_ctl_info()
 249 *      frees the memory allocated by the edac_device_alloc_ctl_info()
 250 *      function
 251 */
 252void edac_device_free_ctl_info(struct edac_device_ctl_info *ctl_info)
 253{
 254        edac_device_unregister_sysfs_main_kobj(ctl_info);
 255}
 256EXPORT_SYMBOL_GPL(edac_device_free_ctl_info);
 257
 258/*
 259 * find_edac_device_by_dev
 260 *      scans the edac_device list for a specific 'struct device *'
 261 *
 262 *      lock to be held prior to call:  device_ctls_mutex
 263 *
 264 *      Return:
 265 *              pointer to control structure managing 'dev'
 266 *              NULL if not found on list
 267 */
 268static struct edac_device_ctl_info *find_edac_device_by_dev(struct device *dev)
 269{
 270        struct edac_device_ctl_info *edac_dev;
 271        struct list_head *item;
 272
 273        edac_dbg(0, "\n");
 274
 275        list_for_each(item, &edac_device_list) {
 276                edac_dev = list_entry(item, struct edac_device_ctl_info, link);
 277
 278                if (edac_dev->dev == dev)
 279                        return edac_dev;
 280        }
 281
 282        return NULL;
 283}
 284
 285/*
 286 * add_edac_dev_to_global_list
 287 *      Before calling this function, caller must
 288 *      assign a unique value to edac_dev->dev_idx.
 289 *
 290 *      lock to be held prior to call:  device_ctls_mutex
 291 *
 292 *      Return:
 293 *              0 on success
 294 *              1 on failure.
 295 */
 296static int add_edac_dev_to_global_list(struct edac_device_ctl_info *edac_dev)
 297{
 298        struct list_head *item, *insert_before;
 299        struct edac_device_ctl_info *rover;
 300
 301        insert_before = &edac_device_list;
 302
 303        /* Determine if already on the list */
 304        rover = find_edac_device_by_dev(edac_dev->dev);
 305        if (unlikely(rover != NULL))
 306                goto fail0;
 307
 308        /* Insert in ascending order by 'dev_idx', so find position */
 309        list_for_each(item, &edac_device_list) {
 310                rover = list_entry(item, struct edac_device_ctl_info, link);
 311
 312                if (rover->dev_idx >= edac_dev->dev_idx) {
 313                        if (unlikely(rover->dev_idx == edac_dev->dev_idx))
 314                                goto fail1;
 315
 316                        insert_before = item;
 317                        break;
 318                }
 319        }
 320
 321        list_add_tail_rcu(&edac_dev->link, insert_before);
 322        return 0;
 323
 324fail0:
 325        edac_printk(KERN_WARNING, EDAC_MC,
 326                        "%s (%s) %s %s already assigned %d\n",
 327                        dev_name(rover->dev), edac_dev_name(rover),
 328                        rover->mod_name, rover->ctl_name, rover->dev_idx);
 329        return 1;
 330
 331fail1:
 332        edac_printk(KERN_WARNING, EDAC_MC,
 333                        "bug in low-level driver: attempt to assign\n"
 334                        "    duplicate dev_idx %d in %s()\n", rover->dev_idx,
 335                        __func__);
 336        return 1;
 337}
 338
 339/*
 340 * del_edac_device_from_global_list
 341 */
 342static void del_edac_device_from_global_list(struct edac_device_ctl_info
 343                                                *edac_device)
 344{
 345        list_del_rcu(&edac_device->link);
 346
 347        /* these are for safe removal of devices from global list while
 348         * NMI handlers may be traversing list
 349         */
 350        synchronize_rcu();
 351        INIT_LIST_HEAD(&edac_device->link);
 352}
 353
 354/*
 355 * edac_device_workq_function
 356 *      performs the operation scheduled by a workq request
 357 *
 358 *      this workq is embedded within an edac_device_ctl_info
 359 *      structure, that needs to be polled for possible error events.
 360 *
 361 *      This operation is to acquire the list mutex lock
 362 *      (thus preventing insertation or deletion)
 363 *      and then call the device's poll function IFF this device is
 364 *      running polled and there is a poll function defined.
 365 */
 366static void edac_device_workq_function(struct work_struct *work_req)
 367{
 368        struct delayed_work *d_work = to_delayed_work(work_req);
 369        struct edac_device_ctl_info *edac_dev = to_edac_device_ctl_work(d_work);
 370
 371        mutex_lock(&device_ctls_mutex);
 372
 373        /* If we are being removed, bail out immediately */
 374        if (edac_dev->op_state == OP_OFFLINE) {
 375                mutex_unlock(&device_ctls_mutex);
 376                return;
 377        }
 378
 379        /* Only poll controllers that are running polled and have a check */
 380        if ((edac_dev->op_state == OP_RUNNING_POLL) &&
 381                (edac_dev->edac_check != NULL)) {
 382                        edac_dev->edac_check(edac_dev);
 383        }
 384
 385        mutex_unlock(&device_ctls_mutex);
 386
 387        /* Reschedule the workq for the next time period to start again
 388         * if the number of msec is for 1 sec, then adjust to the next
 389         * whole one second to save timers firing all over the period
 390         * between integral seconds
 391         */
 392        if (edac_dev->poll_msec == 1000)
 393                queue_delayed_work(edac_workqueue, &edac_dev->work,
 394                                round_jiffies_relative(edac_dev->delay));
 395        else
 396                queue_delayed_work(edac_workqueue, &edac_dev->work,
 397                                edac_dev->delay);
 398}
 399
 400/*
 401 * edac_device_workq_setup
 402 *      initialize a workq item for this edac_device instance
 403 *      passing in the new delay period in msec
 404 */
 405void edac_device_workq_setup(struct edac_device_ctl_info *edac_dev,
 406                                unsigned msec)
 407{
 408        edac_dbg(0, "\n");
 409
 410        /* take the arg 'msec' and set it into the control structure
 411         * to used in the time period calculation
 412         * then calc the number of jiffies that represents
 413         */
 414        edac_dev->poll_msec = msec;
 415        edac_dev->delay = msecs_to_jiffies(msec);
 416
 417        INIT_DELAYED_WORK(&edac_dev->work, edac_device_workq_function);
 418
 419        /* optimize here for the 1 second case, which will be normal value, to
 420         * fire ON the 1 second time event. This helps reduce all sorts of
 421         * timers firing on sub-second basis, while they are happy
 422         * to fire together on the 1 second exactly
 423         */
 424        if (edac_dev->poll_msec == 1000)
 425                queue_delayed_work(edac_workqueue, &edac_dev->work,
 426                                round_jiffies_relative(edac_dev->delay));
 427        else
 428                queue_delayed_work(edac_workqueue, &edac_dev->work,
 429                                edac_dev->delay);
 430}
 431
 432/*
 433 * edac_device_workq_teardown
 434 *      stop the workq processing on this edac_dev
 435 */
 436void edac_device_workq_teardown(struct edac_device_ctl_info *edac_dev)
 437{
 438        int status;
 439
 440        status = cancel_delayed_work(&edac_dev->work);
 441        if (status == 0) {
 442                /* workq instance might be running, wait for it */
 443                flush_workqueue(edac_workqueue);
 444        }
 445}
 446
 447/*
 448 * edac_device_reset_delay_period
 449 *
 450 *      need to stop any outstanding workq queued up at this time
 451 *      because we will be resetting the sleep time.
 452 *      Then restart the workq on the new delay
 453 */
 454void edac_device_reset_delay_period(struct edac_device_ctl_info *edac_dev,
 455                                        unsigned long value)
 456{
 457        /* cancel the current workq request, without the mutex lock */
 458        edac_device_workq_teardown(edac_dev);
 459
 460        /* acquire the mutex before doing the workq setup */
 461        mutex_lock(&device_ctls_mutex);
 462
 463        /* restart the workq request, with new delay value */
 464        edac_device_workq_setup(edac_dev, value);
 465
 466        mutex_unlock(&device_ctls_mutex);
 467}
 468
 469/*
 470 * edac_device_alloc_index: Allocate a unique device index number
 471 *
 472 * Return:
 473 *      allocated index number
 474 */
 475int edac_device_alloc_index(void)
 476{
 477        static atomic_t device_indexes = ATOMIC_INIT(0);
 478
 479        return atomic_inc_return(&device_indexes) - 1;
 480}
 481EXPORT_SYMBOL_GPL(edac_device_alloc_index);
 482
 483/**
 484 * edac_device_add_device: Insert the 'edac_dev' structure into the
 485 * edac_device global list and create sysfs entries associated with
 486 * edac_device structure.
 487 * @edac_device: pointer to the edac_device structure to be added to the list
 488 * 'edac_device' structure.
 489 *
 490 * Return:
 491 *      0       Success
 492 *      !0      Failure
 493 */
 494int edac_device_add_device(struct edac_device_ctl_info *edac_dev)
 495{
 496        edac_dbg(0, "\n");
 497
 498#ifdef CONFIG_EDAC_DEBUG
 499        if (edac_debug_level >= 3)
 500                edac_device_dump_device(edac_dev);
 501#endif
 502        mutex_lock(&device_ctls_mutex);
 503
 504        if (add_edac_dev_to_global_list(edac_dev))
 505                goto fail0;
 506
 507        /* set load time so that error rate can be tracked */
 508        edac_dev->start_time = jiffies;
 509
 510        /* create this instance's sysfs entries */
 511        if (edac_device_create_sysfs(edac_dev)) {
 512                edac_device_printk(edac_dev, KERN_WARNING,
 513                                        "failed to create sysfs device\n");
 514                goto fail1;
 515        }
 516
 517        /* If there IS a check routine, then we are running POLLED */
 518        if (edac_dev->edac_check != NULL) {
 519                /* This instance is NOW RUNNING */
 520                edac_dev->op_state = OP_RUNNING_POLL;
 521
 522                /*
 523                 * enable workq processing on this instance,
 524                 * default = 1000 msec
 525                 */
 526                edac_device_workq_setup(edac_dev, 1000);
 527        } else {
 528                edac_dev->op_state = OP_RUNNING_INTERRUPT;
 529        }
 530
 531        /* Report action taken */
 532        edac_device_printk(edac_dev, KERN_INFO,
 533                                "Giving out device to module '%s' controller "
 534                                "'%s': DEV '%s' (%s)\n",
 535                                edac_dev->mod_name,
 536                                edac_dev->ctl_name,
 537                                edac_dev_name(edac_dev),
 538                                edac_op_state_to_string(edac_dev->op_state));
 539
 540        mutex_unlock(&device_ctls_mutex);
 541        return 0;
 542
 543fail1:
 544        /* Some error, so remove the entry from the lsit */
 545        del_edac_device_from_global_list(edac_dev);
 546
 547fail0:
 548        mutex_unlock(&device_ctls_mutex);
 549        return 1;
 550}
 551EXPORT_SYMBOL_GPL(edac_device_add_device);
 552
 553/**
 554 * edac_device_del_device:
 555 *      Remove sysfs entries for specified edac_device structure and
 556 *      then remove edac_device structure from global list
 557 *
 558 * @dev:
 559 *      Pointer to 'struct device' representing edac_device
 560 *      structure to remove.
 561 *
 562 * Return:
 563 *      Pointer to removed edac_device structure,
 564 *      OR NULL if device not found.
 565 */
 566struct edac_device_ctl_info *edac_device_del_device(struct device *dev)
 567{
 568        struct edac_device_ctl_info *edac_dev;
 569
 570        edac_dbg(0, "\n");
 571
 572        mutex_lock(&device_ctls_mutex);
 573
 574        /* Find the structure on the list, if not there, then leave */
 575        edac_dev = find_edac_device_by_dev(dev);
 576        if (edac_dev == NULL) {
 577                mutex_unlock(&device_ctls_mutex);
 578                return NULL;
 579        }
 580
 581        /* mark this instance as OFFLINE */
 582        edac_dev->op_state = OP_OFFLINE;
 583
 584        /* deregister from global list */
 585        del_edac_device_from_global_list(edac_dev);
 586
 587        mutex_unlock(&device_ctls_mutex);
 588
 589        /* clear workq processing on this instance */
 590        edac_device_workq_teardown(edac_dev);
 591
 592        /* Tear down the sysfs entries for this instance */
 593        edac_device_remove_sysfs(edac_dev);
 594
 595        edac_printk(KERN_INFO, EDAC_MC,
 596                "Removed device %d for %s %s: DEV %s\n",
 597                edac_dev->dev_idx,
 598                edac_dev->mod_name, edac_dev->ctl_name, edac_dev_name(edac_dev));
 599
 600        return edac_dev;
 601}
 602EXPORT_SYMBOL_GPL(edac_device_del_device);
 603
 604static inline int edac_device_get_log_ce(struct edac_device_ctl_info *edac_dev)
 605{
 606        return edac_dev->log_ce;
 607}
 608
 609static inline int edac_device_get_log_ue(struct edac_device_ctl_info *edac_dev)
 610{
 611        return edac_dev->log_ue;
 612}
 613
 614static inline int edac_device_get_panic_on_ue(struct edac_device_ctl_info
 615                                        *edac_dev)
 616{
 617        return edac_dev->panic_on_ue;
 618}
 619
 620/*
 621 * edac_device_handle_ce
 622 *      perform a common output and handling of an 'edac_dev' CE event
 623 */
 624void edac_device_handle_ce(struct edac_device_ctl_info *edac_dev,
 625                        int inst_nr, int block_nr, const char *msg)
 626{
 627        struct edac_device_instance *instance;
 628        struct edac_device_block *block = NULL;
 629
 630        if ((inst_nr >= edac_dev->nr_instances) || (inst_nr < 0)) {
 631                edac_device_printk(edac_dev, KERN_ERR,
 632                                "INTERNAL ERROR: 'instance' out of range "
 633                                "(%d >= %d)\n", inst_nr,
 634                                edac_dev->nr_instances);
 635                return;
 636        }
 637
 638        instance = edac_dev->instances + inst_nr;
 639
 640        if ((block_nr >= instance->nr_blocks) || (block_nr < 0)) {
 641                edac_device_printk(edac_dev, KERN_ERR,
 642                                "INTERNAL ERROR: instance %d 'block' "
 643                                "out of range (%d >= %d)\n",
 644                                inst_nr, block_nr,
 645                                instance->nr_blocks);
 646                return;
 647        }
 648
 649        if (instance->nr_blocks > 0) {
 650                block = instance->blocks + block_nr;
 651                block->counters.ce_count++;
 652        }
 653
 654        /* Propagate the count up the 'totals' tree */
 655        instance->counters.ce_count++;
 656        edac_dev->counters.ce_count++;
 657
 658        if (edac_device_get_log_ce(edac_dev))
 659                edac_device_printk(edac_dev, KERN_WARNING,
 660                                "CE: %s instance: %s block: %s '%s'\n",
 661                                edac_dev->ctl_name, instance->name,
 662                                block ? block->name : "N/A", msg);
 663}
 664EXPORT_SYMBOL_GPL(edac_device_handle_ce);
 665
 666/*
 667 * edac_device_handle_ue
 668 *      perform a common output and handling of an 'edac_dev' UE event
 669 */
 670void edac_device_handle_ue(struct edac_device_ctl_info *edac_dev,
 671                        int inst_nr, int block_nr, const char *msg)
 672{
 673        struct edac_device_instance *instance;
 674        struct edac_device_block *block = NULL;
 675
 676        if ((inst_nr >= edac_dev->nr_instances) || (inst_nr < 0)) {
 677                edac_device_printk(edac_dev, KERN_ERR,
 678                                "INTERNAL ERROR: 'instance' out of range "
 679                                "(%d >= %d)\n", inst_nr,
 680                                edac_dev->nr_instances);
 681                return;
 682        }
 683
 684        instance = edac_dev->instances + inst_nr;
 685
 686        if ((block_nr >= instance->nr_blocks) || (block_nr < 0)) {
 687                edac_device_printk(edac_dev, KERN_ERR,
 688                                "INTERNAL ERROR: instance %d 'block' "
 689                                "out of range (%d >= %d)\n",
 690                                inst_nr, block_nr,
 691                                instance->nr_blocks);
 692                return;
 693        }
 694
 695        if (instance->nr_blocks > 0) {
 696                block = instance->blocks + block_nr;
 697                block->counters.ue_count++;
 698        }
 699
 700        /* Propagate the count up the 'totals' tree */
 701        instance->counters.ue_count++;
 702        edac_dev->counters.ue_count++;
 703
 704        if (edac_device_get_log_ue(edac_dev))
 705                edac_device_printk(edac_dev, KERN_EMERG,
 706                                "UE: %s instance: %s block: %s '%s'\n",
 707                                edac_dev->ctl_name, instance->name,
 708                                block ? block->name : "N/A", msg);
 709
 710        if (edac_device_get_panic_on_ue(edac_dev))
 711                panic("EDAC %s: UE instance: %s block %s '%s'\n",
 712                        edac_dev->ctl_name, instance->name,
 713                        block ? block->name : "N/A", msg);
 714}
 715EXPORT_SYMBOL_GPL(edac_device_handle_ue);
 716
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.