linux/drivers/edac/edac_device.c
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   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/sysdev.h>
  27#include <linux/ctype.h>
  28#include <linux/workqueue.h>
  29#include <asm/uaccess.h>
  30#include <asm/page.h>
  31
  32#include "edac_core.h"
  33#include "edac_module.h"
  34
  35/* lock for the list: 'edac_device_list', manipulation of this list
  36 * is protected by the 'device_ctls_mutex' lock
  37 */
  38static DEFINE_MUTEX(device_ctls_mutex);
  39static LIST_HEAD(edac_device_list);
  40
  41#ifdef CONFIG_EDAC_DEBUG
  42static void edac_device_dump_device(struct edac_device_ctl_info *edac_dev)
  43{
  44        debugf3("\tedac_dev = %p dev_idx=%d \n", edac_dev, edac_dev->dev_idx);
  45        debugf4("\tedac_dev->edac_check = %p\n", edac_dev->edac_check);
  46        debugf3("\tdev = %p\n", edac_dev->dev);
  47        debugf3("\tmod_name:ctl_name = %s:%s\n",
  48                edac_dev->mod_name, edac_dev->ctl_name);
  49        debugf3("\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 struture
  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;
  84        int err;
  85
  86        debugf4("%s() instances=%d blocks=%d\n",
  87                __func__, nr_instances, nr_blocks);
  88
  89        /* Calculate the size of memory we need to allocate AND
  90         * determine the offsets of the various item arrays
  91         * (instance,block,attrib) from the start of an  allocated structure.
  92         * We want the alignment of each item  (instance,block,attrib)
  93         * to be at least as stringent as what the compiler would
  94         * provide if we could simply hardcode everything into a single struct.
  95         */
  96        dev_ctl = (struct edac_device_ctl_info *)NULL;
  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(&dev_ctl[1], sizeof(*dev_inst));
 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        dev_blk = edac_align_ptr(&dev_inst[nr_instances], sizeof(*dev_blk));
 107
 108        /* Calc the 'end' offset past the dev_blk array
 109         * which will become the start of the attrib array, if any.
 110         */
 111        count = nr_instances * nr_blocks;
 112        dev_attrib = edac_align_ptr(&dev_blk[count], sizeof(*dev_attrib));
 113
 114        /* Check for case of when an attribute array is specified */
 115        if (nr_attrib > 0) {
 116                /* calc how many nr_attrib we need */
 117                count *= nr_attrib;
 118
 119                /* Calc the 'end' offset past the attributes array */
 120                pvt = edac_align_ptr(&dev_attrib[count], sz_private);
 121        } else {
 122                /* no attribute array specificed */
 123                pvt = edac_align_ptr(dev_attrib, sz_private);
 124        }
 125
 126        /* 'pvt' now points to where the private data area is.
 127         * At this point 'pvt' (like dev_inst,dev_blk and dev_attrib)
 128         * is baselined at ZERO
 129         */
 130        total_size = ((unsigned long)pvt) + sz_private;
 131
 132        /* Allocate the amount of memory for the set of control structures */
 133        dev_ctl = kzalloc(total_size, GFP_KERNEL);
 134        if (dev_ctl == NULL)
 135                return NULL;
 136
 137        /* Adjust pointers so they point within the actual memory we
 138         * just allocated rather than an imaginary chunk of memory
 139         * located at address 0.
 140         * 'dev_ctl' points to REAL memory, while the others are
 141         * ZERO based and thus need to be adjusted to point within
 142         * the allocated memory.
 143         */
 144        dev_inst = (struct edac_device_instance *)
 145                (((char *)dev_ctl) + ((unsigned long)dev_inst));
 146        dev_blk = (struct edac_device_block *)
 147                (((char *)dev_ctl) + ((unsigned long)dev_blk));
 148        dev_attrib = (struct edac_dev_sysfs_block_attribute *)
 149                (((char *)dev_ctl) + ((unsigned long)dev_attrib));
 150        pvt = sz_private ? (((char *)dev_ctl) + ((unsigned long)pvt)) : NULL;
 151
 152        /* Begin storing the information into the control info structure */
 153        dev_ctl->dev_idx = device_index;
 154        dev_ctl->nr_instances = nr_instances;
 155        dev_ctl->instances = dev_inst;
 156        dev_ctl->pvt_info = pvt;
 157
 158        /* Default logging of CEs and UEs */
 159        dev_ctl->log_ce = 1;
 160        dev_ctl->log_ue = 1;
 161
 162        /* Name of this edac device */
 163        snprintf(dev_ctl->name,sizeof(dev_ctl->name),"%s",edac_device_name);
 164
 165        debugf4("%s() edac_dev=%p next after end=%p\n",
 166                __func__, dev_ctl, pvt + sz_private );
 167
 168        /* Initialize every Instance */
 169        for (instance = 0; instance < nr_instances; instance++) {
 170                inst = &dev_inst[instance];
 171                inst->ctl = dev_ctl;
 172                inst->nr_blocks = nr_blocks;
 173                blk_p = &dev_blk[instance * nr_blocks];
 174                inst->blocks = blk_p;
 175
 176                /* name of this instance */
 177                snprintf(inst->name, sizeof(inst->name),
 178                         "%s%u", edac_device_name, instance);
 179
 180                /* Initialize every block in each instance */
 181                for (block = 0; block < nr_blocks; block++) {
 182                        blk = &blk_p[block];
 183                        blk->instance = inst;
 184                        snprintf(blk->name, sizeof(blk->name),
 185                                 "%s%d", edac_block_name, block+offset_value);
 186
 187                        debugf4("%s() instance=%d inst_p=%p block=#%d "
 188                                "block_p=%p name='%s'\n",
 189                                __func__, instance, inst, block,
 190                                blk, blk->name);
 191
 192                        /* if there are NO attributes OR no attribute pointer
 193                         * then continue on to next block iteration
 194                         */
 195                        if ((nr_attrib == 0) || (attrib_spec == NULL))
 196                                continue;
 197
 198                        /* setup the attribute array for this block */
 199                        blk->nr_attribs = nr_attrib;
 200                        attrib_p = &dev_attrib[block*nr_instances*nr_attrib];
 201                        blk->block_attributes = attrib_p;
 202
 203                        debugf4("%s() THIS BLOCK_ATTRIB=%p\n",
 204                                __func__, blk->block_attributes);
 205
 206                        /* Initialize every user specified attribute in this
 207                         * block with the data the caller passed in
 208                         * Each block gets its own copy of pointers,
 209                         * and its unique 'value'
 210                         */
 211                        for (attr = 0; attr < nr_attrib; attr++) {
 212                                attrib = &attrib_p[attr];
 213
 214                                /* populate the unique per attrib
 215                                 * with the code pointers and info
 216                                 */
 217                                attrib->attr = attrib_spec[attr].attr;
 218                                attrib->show = attrib_spec[attr].show;
 219                                attrib->store = attrib_spec[attr].store;
 220
 221                                attrib->block = blk;    /* up link */
 222
 223                                debugf4("%s() alloc-attrib=%p attrib_name='%s' "
 224                                        "attrib-spec=%p spec-name=%s\n",
 225                                        __func__, attrib, attrib->attr.name,
 226                                        &attrib_spec[attr],
 227                                        attrib_spec[attr].attr.name
 228                                        );
 229                        }
 230                }
 231        }
 232
 233        /* Mark this instance as merely ALLOCATED */
 234        dev_ctl->op_state = OP_ALLOC;
 235
 236        /*
 237         * Initialize the 'root' kobj for the edac_device controller
 238         */
 239        err = edac_device_register_sysfs_main_kobj(dev_ctl);
 240        if (err) {
 241                kfree(dev_ctl);
 242                return NULL;
 243        }
 244
 245        /* at this point, the root kobj is valid, and in order to
 246         * 'free' the object, then the function:
 247         *      edac_device_unregister_sysfs_main_kobj() must be called
 248         * which will perform kobj unregistration and the actual free
 249         * will occur during the kobject callback operation
 250         */
 251
 252        return dev_ctl;
 253}
 254EXPORT_SYMBOL_GPL(edac_device_alloc_ctl_info);
 255
 256/*
 257 * edac_device_free_ctl_info()
 258 *      frees the memory allocated by the edac_device_alloc_ctl_info()
 259 *      function
 260 */
 261void edac_device_free_ctl_info(struct edac_device_ctl_info *ctl_info)
 262{
 263        edac_device_unregister_sysfs_main_kobj(ctl_info);
 264}
 265EXPORT_SYMBOL_GPL(edac_device_free_ctl_info);
 266
 267/*
 268 * find_edac_device_by_dev
 269 *      scans the edac_device list for a specific 'struct device *'
 270 *
 271 *      lock to be held prior to call:  device_ctls_mutex
 272 *
 273 *      Return:
 274 *              pointer to control structure managing 'dev'
 275 *              NULL if not found on list
 276 */
 277static struct edac_device_ctl_info *find_edac_device_by_dev(struct device *dev)
 278{
 279        struct edac_device_ctl_info *edac_dev;
 280        struct list_head *item;
 281
 282        debugf0("%s()\n", __func__);
 283
 284        list_for_each(item, &edac_device_list) {
 285                edac_dev = list_entry(item, struct edac_device_ctl_info, link);
 286
 287                if (edac_dev->dev == dev)
 288                        return edac_dev;
 289        }
 290
 291        return NULL;
 292}
 293
 294/*
 295 * add_edac_dev_to_global_list
 296 *      Before calling this function, caller must
 297 *      assign a unique value to edac_dev->dev_idx.
 298 *
 299 *      lock to be held prior to call:  device_ctls_mutex
 300 *
 301 *      Return:
 302 *              0 on success
 303 *              1 on failure.
 304 */
 305static int add_edac_dev_to_global_list(struct edac_device_ctl_info *edac_dev)
 306{
 307        struct list_head *item, *insert_before;
 308        struct edac_device_ctl_info *rover;
 309
 310        insert_before = &edac_device_list;
 311
 312        /* Determine if already on the list */
 313        rover = find_edac_device_by_dev(edac_dev->dev);
 314        if (unlikely(rover != NULL))
 315                goto fail0;
 316
 317        /* Insert in ascending order by 'dev_idx', so find position */
 318        list_for_each(item, &edac_device_list) {
 319                rover = list_entry(item, struct edac_device_ctl_info, link);
 320
 321                if (rover->dev_idx >= edac_dev->dev_idx) {
 322                        if (unlikely(rover->dev_idx == edac_dev->dev_idx))
 323                                goto fail1;
 324
 325                        insert_before = item;
 326                        break;
 327                }
 328        }
 329
 330        list_add_tail_rcu(&edac_dev->link, insert_before);
 331        return 0;
 332
 333fail0:
 334        edac_printk(KERN_WARNING, EDAC_MC,
 335                        "%s (%s) %s %s already assigned %d\n",
 336                        rover->dev->bus_id, edac_dev_name(rover),
 337                        rover->mod_name, rover->ctl_name, rover->dev_idx);
 338        return 1;
 339
 340fail1:
 341        edac_printk(KERN_WARNING, EDAC_MC,
 342                        "bug in low-level driver: attempt to assign\n"
 343                        "    duplicate dev_idx %d in %s()\n", rover->dev_idx,
 344                        __func__);
 345        return 1;
 346}
 347
 348/*
 349 * complete_edac_device_list_del
 350 *
 351 *      callback function when reference count is zero
 352 */
 353static void complete_edac_device_list_del(struct rcu_head *head)
 354{
 355        struct edac_device_ctl_info *edac_dev;
 356
 357        edac_dev = container_of(head, struct edac_device_ctl_info, rcu);
 358        INIT_LIST_HEAD(&edac_dev->link);
 359        complete(&edac_dev->removal_complete);
 360}
 361
 362/*
 363 * del_edac_device_from_global_list
 364 *
 365 *      remove the RCU, setup for a callback call,
 366 *      then wait for the callback to occur
 367 */
 368static void del_edac_device_from_global_list(struct edac_device_ctl_info
 369                                                *edac_device)
 370{
 371        list_del_rcu(&edac_device->link);
 372
 373        init_completion(&edac_device->removal_complete);
 374        call_rcu(&edac_device->rcu, complete_edac_device_list_del);
 375        wait_for_completion(&edac_device->removal_complete);
 376}
 377
 378/*
 379 * edac_device_workq_function
 380 *      performs the operation scheduled by a workq request
 381 *
 382 *      this workq is embedded within an edac_device_ctl_info
 383 *      structure, that needs to be polled for possible error events.
 384 *
 385 *      This operation is to acquire the list mutex lock
 386 *      (thus preventing insertation or deletion)
 387 *      and then call the device's poll function IFF this device is
 388 *      running polled and there is a poll function defined.
 389 */
 390static void edac_device_workq_function(struct work_struct *work_req)
 391{
 392        struct delayed_work *d_work = (struct delayed_work *)work_req;
 393        struct edac_device_ctl_info *edac_dev = to_edac_device_ctl_work(d_work);
 394
 395        mutex_lock(&device_ctls_mutex);
 396
 397        /* If we are being removed, bail out immediately */
 398        if (edac_dev->op_state == OP_OFFLINE) {
 399                mutex_unlock(&device_ctls_mutex);
 400                return;
 401        }
 402
 403        /* Only poll controllers that are running polled and have a check */
 404        if ((edac_dev->op_state == OP_RUNNING_POLL) &&
 405                (edac_dev->edac_check != NULL)) {
 406                        edac_dev->edac_check(edac_dev);
 407        }
 408
 409        mutex_unlock(&device_ctls_mutex);
 410
 411        /* Reschedule the workq for the next time period to start again
 412         * if the number of msec is for 1 sec, then adjust to the next
 413         * whole one second to save timers fireing all over the period
 414         * between integral seconds
 415         */
 416        if (edac_dev->poll_msec == 1000)
 417                queue_delayed_work(edac_workqueue, &edac_dev->work,
 418                                round_jiffies_relative(edac_dev->delay));
 419        else
 420                queue_delayed_work(edac_workqueue, &edac_dev->work,
 421                                edac_dev->delay);
 422}
 423
 424/*
 425 * edac_device_workq_setup
 426 *      initialize a workq item for this edac_device instance
 427 *      passing in the new delay period in msec
 428 */
 429void edac_device_workq_setup(struct edac_device_ctl_info *edac_dev,
 430                                unsigned msec)
 431{
 432        debugf0("%s()\n", __func__);
 433
 434        /* take the arg 'msec' and set it into the control structure
 435         * to used in the time period calculation
 436         * then calc the number of jiffies that represents
 437         */
 438        edac_dev->poll_msec = msec;
 439        edac_dev->delay = msecs_to_jiffies(msec);
 440
 441        INIT_DELAYED_WORK(&edac_dev->work, edac_device_workq_function);
 442
 443        /* optimize here for the 1 second case, which will be normal value, to
 444         * fire ON the 1 second time event. This helps reduce all sorts of
 445         * timers firing on sub-second basis, while they are happy
 446         * to fire together on the 1 second exactly
 447         */
 448        if (edac_dev->poll_msec == 1000)
 449                queue_delayed_work(edac_workqueue, &edac_dev->work,
 450                                round_jiffies_relative(edac_dev->delay));
 451        else
 452                queue_delayed_work(edac_workqueue, &edac_dev->work,
 453                                edac_dev->delay);
 454}
 455
 456/*
 457 * edac_device_workq_teardown
 458 *      stop the workq processing on this edac_dev
 459 */
 460void edac_device_workq_teardown(struct edac_device_ctl_info *edac_dev)
 461{
 462        int status;
 463
 464        status = cancel_delayed_work(&edac_dev->work);
 465        if (status == 0) {
 466                /* workq instance might be running, wait for it */
 467                flush_workqueue(edac_workqueue);
 468        }
 469}
 470
 471/*
 472 * edac_device_reset_delay_period
 473 *
 474 *      need to stop any outstanding workq queued up at this time
 475 *      because we will be resetting the sleep time.
 476 *      Then restart the workq on the new delay
 477 */
 478void edac_device_reset_delay_period(struct edac_device_ctl_info *edac_dev,
 479                                        unsigned long value)
 480{
 481        /* cancel the current workq request, without the mutex lock */
 482        edac_device_workq_teardown(edac_dev);
 483
 484        /* acquire the mutex before doing the workq setup */
 485        mutex_lock(&device_ctls_mutex);
 486
 487        /* restart the workq request, with new delay value */
 488        edac_device_workq_setup(edac_dev, value);
 489
 490        mutex_unlock(&device_ctls_mutex);
 491}
 492
 493/**
 494 * edac_device_add_device: Insert the 'edac_dev' structure into the
 495 * edac_device global list and create sysfs entries associated with
 496 * edac_device structure.
 497 * @edac_device: pointer to the edac_device structure to be added to the list
 498 * 'edac_device' structure.
 499 *
 500 * Return:
 501 *      0       Success
 502 *      !0      Failure
 503 */
 504int edac_device_add_device(struct edac_device_ctl_info *edac_dev)
 505{
 506        debugf0("%s()\n", __func__);
 507
 508#ifdef CONFIG_EDAC_DEBUG
 509        if (edac_debug_level >= 3)
 510                edac_device_dump_device(edac_dev);
 511#endif
 512        mutex_lock(&device_ctls_mutex);
 513
 514        if (add_edac_dev_to_global_list(edac_dev))
 515                goto fail0;
 516
 517        /* set load time so that error rate can be tracked */
 518        edac_dev->start_time = jiffies;
 519
 520        /* create this instance's sysfs entries */
 521        if (edac_device_create_sysfs(edac_dev)) {
 522                edac_device_printk(edac_dev, KERN_WARNING,
 523                                        "failed to create sysfs device\n");
 524                goto fail1;
 525        }
 526
 527        /* If there IS a check routine, then we are running POLLED */
 528        if (edac_dev->edac_check != NULL) {
 529                /* This instance is NOW RUNNING */
 530                edac_dev->op_state = OP_RUNNING_POLL;
 531
 532                /*
 533                 * enable workq processing on this instance,
 534                 * default = 1000 msec
 535                 */
 536                edac_device_workq_setup(edac_dev, 1000);
 537        } else {
 538                edac_dev->op_state = OP_RUNNING_INTERRUPT;
 539        }
 540
 541        /* Report action taken */
 542        edac_device_printk(edac_dev, KERN_INFO,
 543                                "Giving out device to module '%s' controller "
 544                                "'%s': DEV '%s' (%s)\n",
 545                                edac_dev->mod_name,
 546                                edac_dev->ctl_name,
 547                                edac_dev_name(edac_dev),
 548                                edac_op_state_to_string(edac_dev->op_state));
 549
 550        mutex_unlock(&device_ctls_mutex);
 551        return 0;
 552
 553fail1:
 554        /* Some error, so remove the entry from the lsit */
 555        del_edac_device_from_global_list(edac_dev);
 556
 557fail0:
 558        mutex_unlock(&device_ctls_mutex);
 559        return 1;
 560}
 561EXPORT_SYMBOL_GPL(edac_device_add_device);
 562
 563/**
 564 * edac_device_del_device:
 565 *      Remove sysfs entries for specified edac_device structure and
 566 *      then remove edac_device structure from global list
 567 *
 568 * @pdev:
 569 *      Pointer to 'struct device' representing edac_device
 570 *      structure to remove.
 571 *
 572 * Return:
 573 *      Pointer to removed edac_device structure,
 574 *      OR NULL if device not found.
 575 */
 576struct edac_device_ctl_info *edac_device_del_device(struct device *dev)
 577{
 578        struct edac_device_ctl_info *edac_dev;
 579
 580        debugf0("%s()\n", __func__);
 581
 582        mutex_lock(&device_ctls_mutex);
 583
 584        /* Find the structure on the list, if not there, then leave */
 585        edac_dev = find_edac_device_by_dev(dev);
 586        if (edac_dev == NULL) {
 587                mutex_unlock(&device_ctls_mutex);
 588                return NULL;
 589        }
 590
 591        /* mark this instance as OFFLINE */
 592        edac_dev->op_state = OP_OFFLINE;
 593
 594        /* deregister from global list */
 595        del_edac_device_from_global_list(edac_dev);
 596
 597        mutex_unlock(&device_ctls_mutex);
 598
 599        /* clear workq processing on this instance */
 600        edac_device_workq_teardown(edac_dev);
 601
 602        /* Tear down the sysfs entries for this instance */
 603        edac_device_remove_sysfs(edac_dev);
 604
 605        edac_printk(KERN_INFO, EDAC_MC,
 606                "Removed device %d for %s %s: DEV %s\n",
 607                edac_dev->dev_idx,
 608                edac_dev->mod_name, edac_dev->ctl_name, edac_dev_name(edac_dev));
 609
 610        return edac_dev;
 611}
 612EXPORT_SYMBOL_GPL(edac_device_del_device);
 613
 614static inline int edac_device_get_log_ce(struct edac_device_ctl_info *edac_dev)
 615{
 616        return edac_dev->log_ce;
 617}
 618
 619static inline int edac_device_get_log_ue(struct edac_device_ctl_info *edac_dev)
 620{
 621        return edac_dev->log_ue;
 622}
 623
 624static inline int edac_device_get_panic_on_ue(struct edac_device_ctl_info
 625                                        *edac_dev)
 626{
 627        return edac_dev->panic_on_ue;
 628}
 629
 630/*
 631 * edac_device_handle_ce
 632 *      perform a common output and handling of an 'edac_dev' CE event
 633 */
 634void edac_device_handle_ce(struct edac_device_ctl_info *edac_dev,
 635                        int inst_nr, int block_nr, const char *msg)
 636{
 637        struct edac_device_instance *instance;
 638        struct edac_device_block *block = NULL;
 639
 640        if ((inst_nr >= edac_dev->nr_instances) || (inst_nr < 0)) {
 641                edac_device_printk(edac_dev, KERN_ERR,
 642                                "INTERNAL ERROR: 'instance' out of range "
 643                                "(%d >= %d)\n", inst_nr,
 644                                edac_dev->nr_instances);
 645                return;
 646        }
 647
 648        instance = edac_dev->instances + inst_nr;
 649
 650        if ((block_nr >= instance->nr_blocks) || (block_nr < 0)) {
 651                edac_device_printk(edac_dev, KERN_ERR,
 652                                "INTERNAL ERROR: instance %d 'block' "
 653                                "out of range (%d >= %d)\n",
 654                                inst_nr, block_nr,
 655                                instance->nr_blocks);
 656                return;
 657        }
 658
 659        if (instance->nr_blocks > 0) {
 660                block = instance->blocks + block_nr;
 661                block->counters.ce_count++;
 662        }
 663
 664        /* Propogate the count up the 'totals' tree */
 665        instance->counters.ce_count++;
 666        edac_dev->counters.ce_count++;
 667
 668        if (edac_device_get_log_ce(edac_dev))
 669                edac_device_printk(edac_dev, KERN_WARNING,
 670                                "CE: %s instance: %s block: %s '%s'\n",
 671                                edac_dev->ctl_name, instance->name,
 672                                block ? block->name : "N/A", msg);
 673}
 674EXPORT_SYMBOL_GPL(edac_device_handle_ce);
 675
 676/*
 677 * edac_device_handle_ue
 678 *      perform a common output and handling of an 'edac_dev' UE event
 679 */
 680void edac_device_handle_ue(struct edac_device_ctl_info *edac_dev,
 681                        int inst_nr, int block_nr, const char *msg)
 682{
 683        struct edac_device_instance *instance;
 684        struct edac_device_block *block = NULL;
 685
 686        if ((inst_nr >= edac_dev->nr_instances) || (inst_nr < 0)) {
 687                edac_device_printk(edac_dev, KERN_ERR,
 688                                "INTERNAL ERROR: 'instance' out of range "
 689                                "(%d >= %d)\n", inst_nr,
 690                                edac_dev->nr_instances);
 691                return;
 692        }
 693
 694        instance = edac_dev->instances + inst_nr;
 695
 696        if ((block_nr >= instance->nr_blocks) || (block_nr < 0)) {
 697                edac_device_printk(edac_dev, KERN_ERR,
 698                                "INTERNAL ERROR: instance %d 'block' "
 699                                "out of range (%d >= %d)\n",
 700                                inst_nr, block_nr,
 701                                instance->nr_blocks);
 702                return;
 703        }
 704
 705        if (instance->nr_blocks > 0) {
 706                block = instance->blocks + block_nr;
 707                block->counters.ue_count++;
 708        }
 709
 710        /* Propogate the count up the 'totals' tree */
 711        instance->counters.ue_count++;
 712        edac_dev->counters.ue_count++;
 713
 714        if (edac_device_get_log_ue(edac_dev))
 715                edac_device_printk(edac_dev, KERN_EMERG,
 716                                "UE: %s instance: %s block: %s '%s'\n",
 717                                edac_dev->ctl_name, instance->name,
 718                                block ? block->name : "N/A", msg);
 719
 720        if (edac_device_get_panic_on_ue(edac_dev))
 721                panic("EDAC %s: UE instance: %s block %s '%s'\n",
 722                        edac_dev->ctl_name, instance->name,
 723                        block ? block->name : "N/A", msg);
 724}
 725EXPORT_SYMBOL_GPL(edac_device_handle_ue);
 726
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