drivers/edac/edac_mc_sysfs.c

   1 /*
   2  * edac_mc kernel module
   3  * (C) 2005, 2006 Linux Networx (http://lnxi.com)
   4  * This file may be distributed under the terms of the
   5  * GNU General Public License.
   6  *
   7  * Written Doug Thompson <norsk5@xmission.com>
   8  *
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/sysdev.h>
  13 #include <linux/ctype.h>
  14
  15 #include "edac_core.h"
  16 #include "edac_module.h"
  17
  18 /* MC EDAC Controls, setable by module parameter, and sysfs */
  19 static int edac_mc_log_ue = 1;
  20 static int edac_mc_log_ce = 1;
  21 static int edac_mc_panic_on_ue = 0;
  22 static int edac_mc_poll_msec = 1000;
  23
  24 /* Getter functions for above */
  25 int edac_mc_get_log_ue(void)
  26 {
  27         return edac_mc_log_ue;
  28 }
  29
  30 int edac_mc_get_log_ce(void)
  31 {
  32         return edac_mc_log_ce;
  33 }
  34
  35 int edac_mc_get_panic_on_ue(void)
  36 {
  37         return edac_mc_panic_on_ue;
  38 }
  39
  40 /* this is temporary */
  41 int edac_mc_get_poll_msec(void)
  42 {
  43         return edac_mc_poll_msec;
  44 }
  45
  46 /* Parameter declarations for above */
  47 module_param(edac_mc_panic_on_ue, int, 0644);
  48 MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
  49 module_param(edac_mc_log_ue, int, 0644);
  50 MODULE_PARM_DESC(edac_mc_log_ue,
  51                 "Log uncorrectable error to console: 0=off 1=on");
  52 module_param(edac_mc_log_ce, int, 0644);
  53 MODULE_PARM_DESC(edac_mc_log_ce,
  54                 "Log correctable error to console: 0=off 1=on");
  55 module_param(edac_mc_poll_msec, int, 0644);
  56 MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
  57
  58
  59 /*
  60  * various constants for Memory Controllers
  61  */
  62 static const char *mem_types[] = {
  63         [MEM_EMPTY] = "Empty",
  64         [MEM_RESERVED] = "Reserved",
  65         [MEM_UNKNOWN] = "Unknown",
  66         [MEM_FPM] = "FPM",
  67         [MEM_EDO] = "EDO",
  68         [MEM_BEDO] = "BEDO",
  69         [MEM_SDR] = "Unbuffered-SDR",
  70         [MEM_RDR] = "Registered-SDR",
  71         [MEM_DDR] = "Unbuffered-DDR",
  72         [MEM_RDDR] = "Registered-DDR",
  73         [MEM_RMBS] = "RMBS",
  74         [MEM_DDR2] = "Unbuffered-DDR2",
  75         [MEM_FB_DDR2] = "FullyBuffered-DDR2",
  76         [MEM_RDDR2] = "Registered-DDR2"
  77 };
  78
  79 static const char *dev_types[] = {
  80         [DEV_UNKNOWN] = "Unknown",
  81         [DEV_X1] = "x1",
  82         [DEV_X2] = "x2",
  83         [DEV_X4] = "x4",
  84         [DEV_X8] = "x8",
  85         [DEV_X16] = "x16",
  86         [DEV_X32] = "x32",
  87         [DEV_X64] = "x64"
  88 };
  89
  90 static const char *edac_caps[] = {
  91         [EDAC_UNKNOWN] = "Unknown",
  92         [EDAC_NONE] = "None",
  93         [EDAC_RESERVED] = "Reserved",
  94         [EDAC_PARITY] = "PARITY",
  95         [EDAC_EC] = "EC",
  96         [EDAC_SECDED] = "SECDED",
  97         [EDAC_S2ECD2ED] = "S2ECD2ED",
  98         [EDAC_S4ECD4ED] = "S4ECD4ED",
  99         [EDAC_S8ECD8ED] = "S8ECD8ED",
 100         [EDAC_S16ECD16ED] = "S16ECD16ED"
 101 };
 102
 103 /* sysfs object:
 104  *      /sys/devices/system/edac/mc
 105  */
 106 static struct kobject edac_memctrl_kobj;
 107
 108 /* We use these to wait for the reference counts on edac_memctrl_kobj and
 109  * edac_pci_kobj to reach 0.
 110  */
 111 static struct completion edac_memctrl_kobj_complete;
 112
 113 /*
 114  * /sys/devices/system/edac/mc;
 115  *      data structures and methods
 116  */
 117 static ssize_t memctrl_int_show(void *ptr, char *buffer)
 118 {
 119         int *value = (int*) ptr;
 120         return sprintf(buffer, "%u\n", *value);
 121 }
 122
 123 static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count)
 124 {
 125         int *value = (int*) ptr;
 126
 127         if (isdigit(*buffer))
 128                 *value = simple_strtoul(buffer, NULL, 0);
 129
 130         return count;
 131 }
 132
 133 struct memctrl_dev_attribute {
 134         struct attribute attr;
 135         void *value;
 136         ssize_t (*show)(void *,char *);
 137         ssize_t (*store)(void *, const char *, size_t);
 138 };
 139
 140 /* Set of show/store abstract level functions for memory control object */
 141 static ssize_t memctrl_dev_show(struct kobject *kobj,
 142                 struct attribute *attr, char *buffer)
 143 {
 144         struct memctrl_dev_attribute *memctrl_dev;
 145         memctrl_dev = (struct memctrl_dev_attribute*)attr;
 146
 147         if (memctrl_dev->show)
 148                 return memctrl_dev->show(memctrl_dev->value, buffer);
 149
 150         return -EIO;
 151 }
 152
 153 static ssize_t memctrl_dev_store(struct kobject *kobj, struct attribute *attr,
 154                 const char *buffer, size_t count)
 155 {
 156         struct memctrl_dev_attribute *memctrl_dev;
 157         memctrl_dev = (struct memctrl_dev_attribute*)attr;
 158
 159         if (memctrl_dev->store)
 160                 return memctrl_dev->store(memctrl_dev->value, buffer, count);
 161
 162         return -EIO;
 163 }
 164
 165 static struct sysfs_ops memctrlfs_ops = {
 166         .show   = memctrl_dev_show,
 167         .store  = memctrl_dev_store
 168 };
 169
 170 #define MEMCTRL_ATTR(_name,_mode,_show,_store)                  \
 171 static struct memctrl_dev_attribute attr_##_name = {                    \
 172         .attr = {.name = __stringify(_name), .mode = _mode },   \
 173         .value  = &_name,                                       \
 174         .show   = _show,                                        \
 175         .store  = _store,                                       \
 176 };
 177
 178 #define MEMCTRL_STRING_ATTR(_name,_data,_mode,_show,_store)     \
 179 static struct memctrl_dev_attribute attr_##_name = {                    \
 180         .attr = {.name = __stringify(_name), .mode = _mode },   \
 181         .value  = _data,                                        \
 182         .show   = _show,                                        \
 183         .store  = _store,                                       \
 184 };
 185
 186 /* csrow<id> control files */
 187 MEMCTRL_ATTR(edac_mc_panic_on_ue,
 188                 S_IRUGO | S_IWUSR,
 189                 memctrl_int_show,
 190                 memctrl_int_store);
 191
 192 MEMCTRL_ATTR(edac_mc_log_ue,
 193                 S_IRUGO|S_IWUSR,
 194                 memctrl_int_show,
 195                 memctrl_int_store);
 196
 197 MEMCTRL_ATTR(edac_mc_log_ce,
 198                 S_IRUGO|S_IWUSR,
 199                 memctrl_int_show,
 200                 memctrl_int_store);
 201
 202 MEMCTRL_ATTR(edac_mc_poll_msec,
 203                 S_IRUGO|S_IWUSR,
 204                 memctrl_int_show,
 205                 memctrl_int_store);
 206
 207 /* Base Attributes of the memory ECC object */
 208 static struct memctrl_dev_attribute *memctrl_attr[] = {
 209         &attr_edac_mc_panic_on_ue,
 210         &attr_edac_mc_log_ue,
 211         &attr_edac_mc_log_ce,
 212         &attr_edac_mc_poll_msec,
 213         NULL,
 214 };
 215
 216 /* Main MC kobject release() function */
 217 static void edac_memctrl_master_release(struct kobject *kobj)
 218 {
 219         debugf1("%s()\n", __func__);
 220         complete(&edac_memctrl_kobj_complete);
 221 }
 222
 223 static struct kobj_type ktype_memctrl = {
 224         .release = edac_memctrl_master_release,
 225         .sysfs_ops = &memctrlfs_ops,
 226         .default_attrs = (struct attribute **) memctrl_attr,
 227 };
 228
 229 /* Initialize the main sysfs entries for edac:
 230  *   /sys/devices/system/edac
 231  *
 232  * and children
 233  *
 234  * Return:  0 SUCCESS
 235  *         !0 FAILURE
 236  */
 237 int edac_sysfs_memctrl_setup(void)
 238 {
 239         int err = 0;
 240         struct sysdev_class *edac_class;
 241
 242         debugf1("%s()\n", __func__);
 243
 244         /* get the /sys/devices/system/edac class reference */
 245         edac_class = edac_get_edac_class();
 246         if (edac_class == NULL) {
 247                 debugf1("%s() no edac_class error=%d\n", __func__, err);
 248                 return err;
 249         }
 250
 251         /* Init the MC's kobject */
 252         memset(&edac_memctrl_kobj, 0, sizeof (edac_memctrl_kobj));
 253         edac_memctrl_kobj.parent = &edac_class->kset.kobj;
 254         edac_memctrl_kobj.ktype = &ktype_memctrl;
 255
 256         /* generate sysfs "..../edac/mc"   */
 257         err = kobject_set_name(&edac_memctrl_kobj,"mc");
 258         if (err) {
 259                 debugf1("%s() Failed to set name '.../edac/mc'\n", __func__ );
 260                 return err;
 261         }
 262
 263         /* FIXME: maybe new sysdev_create_subdir() */
 264         err = kobject_register(&edac_memctrl_kobj);
 265         if (err) {
 266                 debugf1("%s() Failed to register '.../edac/mc'\n", __func__ );
 267                 return err;
 268         }
 269
 270         debugf1("%s() Registered '.../edac/mc' kobject\n",__func__);
 271         return 0;
 272 }
 273
 274 /*
 275  * MC teardown:
 276  *      the '..../edac/mc' kobject followed by '..../edac' itself
 277  */
 278 void edac_sysfs_memctrl_teardown(void)
 279 {
 280         debugf0("MC: " __FILE__ ": %s()\n", __func__);
 281
 282         /* Unregister the MC's kobject and wait for reference count to reach 0.
 283          */
 284         init_completion(&edac_memctrl_kobj_complete);
 285         kobject_unregister(&edac_memctrl_kobj);
 286         wait_for_completion(&edac_memctrl_kobj_complete);
 287 }
 288
 289
 290 /* EDAC sysfs CSROW data structures and methods
 291  */
 292
 293 /* Set of more default csrow<id> attribute show/store functions */
 294 static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data,
 295                         int private)
 296 {
 297         return sprintf(data,"%u\n", csrow->ue_count);
 298 }
 299
 300 static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data,
 301                         int private)
 302 {
 303         return sprintf(data,"%u\n", csrow->ce_count);
 304 }
 305
 306 static ssize_t csrow_size_show(struct csrow_info *csrow, char *data,
 307                         int private)
 308 {
 309         return sprintf(data,"%u\n", PAGES_TO_MiB(csrow->nr_pages));
 310 }
 311
 312 static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data,
 313                         int private)
 314 {
 315         return sprintf(data,"%s\n", mem_types[csrow->mtype]);
 316 }
 317
 318 static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data,
 319                         int private)
 320 {
 321         return sprintf(data,"%s\n", dev_types[csrow->dtype]);
 322 }
 323
 324 static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data,
 325                         int private)
 326 {
 327         return sprintf(data,"%s\n", edac_caps[csrow->edac_mode]);
 328 }
 329
 330 /* show/store functions for DIMM Label attributes */
 331 static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
 332                 char *data, int channel)
 333 {
 334         return snprintf(data, EDAC_MC_LABEL_LEN,"%s",
 335                         csrow->channels[channel].label);
 336 }
 337
 338 static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
 339                                 const char *data,
 340                                 size_t count,
 341                                 int channel)
 342 {
 343         ssize_t max_size = 0;
 344
 345         max_size = min((ssize_t)count,(ssize_t)EDAC_MC_LABEL_LEN-1);
 346         strncpy(csrow->channels[channel].label, data, max_size);
 347         csrow->channels[channel].label[max_size] = '\0';
 348
 349         return max_size;
 350 }
 351
 352 /* show function for dynamic chX_ce_count attribute */
 353 static ssize_t channel_ce_count_show(struct csrow_info *csrow,
 354                                 char *data,
 355                                 int channel)
 356 {
 357         return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
 358 }
 359
 360 /* csrow specific attribute structure */
 361 struct csrowdev_attribute {
 362         struct attribute attr;
 363         ssize_t (*show)(struct csrow_info *,char *,int);
 364         ssize_t (*store)(struct csrow_info *, const char *,size_t,int);
 365         int    private;
 366 };
 367
 368 #define to_csrow(k) container_of(k, struct csrow_info, kobj)
 369 #define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
 370
 371 /* Set of show/store higher level functions for default csrow attributes */
 372 static ssize_t csrowdev_show(struct kobject *kobj,
 373                         struct attribute *attr,
 374                         char *buffer)
 375 {
 376         struct csrow_info *csrow = to_csrow(kobj);
 377         struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
 378
 379         if (csrowdev_attr->show)
 380                 return csrowdev_attr->show(csrow,
 381                                         buffer,
 382                                         csrowdev_attr->private);
 383         return -EIO;
 384 }
 385
 386 static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
 387                 const char *buffer, size_t count)
 388 {
 389         struct csrow_info *csrow = to_csrow(kobj);
 390         struct csrowdev_attribute * csrowdev_attr = to_csrowdev_attr(attr);
 391
 392         if (csrowdev_attr->store)
 393                 return csrowdev_attr->store(csrow,
 394                                         buffer,
 395                                         count,
 396                                         csrowdev_attr->private);
 397         return -EIO;
 398 }
 399
 400 static struct sysfs_ops csrowfs_ops = {
 401         .show   = csrowdev_show,
 402         .store  = csrowdev_store
 403 };
 404
 405 #define CSROWDEV_ATTR(_name,_mode,_show,_store,_private)        \
 406 static struct csrowdev_attribute attr_##_name = {                       \
 407         .attr = {.name = __stringify(_name), .mode = _mode },   \
 408         .show   = _show,                                        \
 409         .store  = _store,                                       \
 410         .private = _private,                                    \
 411 };
 412
 413 /* default cwrow<id>/attribute files */
 414 CSROWDEV_ATTR(size_mb,S_IRUGO,csrow_size_show,NULL,0);
 415 CSROWDEV_ATTR(dev_type,S_IRUGO,csrow_dev_type_show,NULL,0);
 416 CSROWDEV_ATTR(mem_type,S_IRUGO,csrow_mem_type_show,NULL,0);
 417 CSROWDEV_ATTR(edac_mode,S_IRUGO,csrow_edac_mode_show,NULL,0);
 418 CSROWDEV_ATTR(ue_count,S_IRUGO,csrow_ue_count_show,NULL,0);
 419 CSROWDEV_ATTR(ce_count,S_IRUGO,csrow_ce_count_show,NULL,0);
 420
 421 /* default attributes of the CSROW<id> object */
 422 static struct csrowdev_attribute *default_csrow_attr[] = {
 423         &attr_dev_type,
 424         &attr_mem_type,
 425         &attr_edac_mode,
 426         &attr_size_mb,
 427         &attr_ue_count,
 428         &attr_ce_count,
 429         NULL,
 430 };
 431
 432
 433 /* possible dynamic channel DIMM Label attribute files */
 434 CSROWDEV_ATTR(ch0_dimm_label,S_IRUGO|S_IWUSR,
 435                 channel_dimm_label_show,
 436                 channel_dimm_label_store,
 437                 0 );
 438 CSROWDEV_ATTR(ch1_dimm_label,S_IRUGO|S_IWUSR,
 439                 channel_dimm_label_show,
 440                 channel_dimm_label_store,
 441                 1 );
 442 CSROWDEV_ATTR(ch2_dimm_label,S_IRUGO|S_IWUSR,
 443                 channel_dimm_label_show,
 444                 channel_dimm_label_store,
 445                 2 );
 446 CSROWDEV_ATTR(ch3_dimm_label,S_IRUGO|S_IWUSR,
 447                 channel_dimm_label_show,
 448                 channel_dimm_label_store,
 449                 3 );
 450 CSROWDEV_ATTR(ch4_dimm_label,S_IRUGO|S_IWUSR,
 451                 channel_dimm_label_show,
 452                 channel_dimm_label_store,
 453                 4 );
 454 CSROWDEV_ATTR(ch5_dimm_label,S_IRUGO|S_IWUSR,
 455                 channel_dimm_label_show,
 456                 channel_dimm_label_store,
 457                 5 );
 458
 459 /* Total possible dynamic DIMM Label attribute file table */
 460 static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
 461                 &attr_ch0_dimm_label,
 462                 &attr_ch1_dimm_label,
 463                 &attr_ch2_dimm_label,
 464                 &attr_ch3_dimm_label,
 465                 &attr_ch4_dimm_label,
 466                 &attr_ch5_dimm_label
 467 };
 468
 469 /* possible dynamic channel ce_count attribute files */
 470 CSROWDEV_ATTR(ch0_ce_count,S_IRUGO|S_IWUSR,
 471                 channel_ce_count_show,
 472                 NULL,
 473                 0 );
 474 CSROWDEV_ATTR(ch1_ce_count,S_IRUGO|S_IWUSR,
 475                 channel_ce_count_show,
 476                 NULL,
 477                 1 );
 478 CSROWDEV_ATTR(ch2_ce_count,S_IRUGO|S_IWUSR,
 479                 channel_ce_count_show,
 480                 NULL,
 481                 2 );
 482 CSROWDEV_ATTR(ch3_ce_count,S_IRUGO|S_IWUSR,
 483                 channel_ce_count_show,
 484                 NULL,
 485                 3 );
 486 CSROWDEV_ATTR(ch4_ce_count,S_IRUGO|S_IWUSR,
 487                 channel_ce_count_show,
 488                 NULL,
 489                 4 );
 490 CSROWDEV_ATTR(ch5_ce_count,S_IRUGO|S_IWUSR,
 491                 channel_ce_count_show,
 492                 NULL,
 493                 5 );
 494
 495 /* Total possible dynamic ce_count attribute file table */
 496 static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
 497                 &attr_ch0_ce_count,
 498                 &attr_ch1_ce_count,
 499                 &attr_ch2_ce_count,
 500                 &attr_ch3_ce_count,
 501                 &attr_ch4_ce_count,
 502                 &attr_ch5_ce_count
 503 };
 504
 505
 506 #define EDAC_NR_CHANNELS        6
 507
 508 /* Create dynamic CHANNEL files, indexed by 'chan',  under specifed CSROW */
 509 static int edac_create_channel_files(struct kobject *kobj, int chan)
 510 {
 511         int err=-ENODEV;
 512
 513         if (chan >= EDAC_NR_CHANNELS)
 514                 return err;
 515
 516         /* create the DIMM label attribute file */
 517         err = sysfs_create_file(kobj,
 518                         (struct attribute *) dynamic_csrow_dimm_attr[chan]);
 519
 520         if (!err) {
 521                 /* create the CE Count attribute file */
 522                 err = sysfs_create_file(kobj,
 523                         (struct attribute *)dynamic_csrow_ce_count_attr[chan]);
 524         } else {
 525                 debugf1("%s()  dimm labels and ce_count files created",
 526                         __func__);
 527         }
 528
 529         return err;
 530 }
 531
 532 /* No memory to release for this kobj */
 533 static void edac_csrow_instance_release(struct kobject *kobj)
 534 {
 535         struct csrow_info *cs;
 536
 537         cs = container_of(kobj, struct csrow_info, kobj);
 538         complete(&cs->kobj_complete);
 539 }
 540
 541 /* the kobj_type instance for a CSROW */
 542 static struct kobj_type ktype_csrow = {
 543         .release = edac_csrow_instance_release,
 544         .sysfs_ops = &csrowfs_ops,
 545         .default_attrs = (struct attribute **) default_csrow_attr,
 546 };
 547
 548 /* Create a CSROW object under specifed edac_mc_device */
 549 static int edac_create_csrow_object(
 550                 struct kobject *edac_mci_kobj,
 551                 struct csrow_info *csrow,
 552                 int index)
 553 {
 554         int err = 0;
 555         int chan;
 556
 557         memset(&csrow->kobj, 0, sizeof(csrow->kobj));
 558
 559         /* generate ..../edac/mc/mc<id>/csrow<index>   */
 560
 561         csrow->kobj.parent = edac_mci_kobj;
 562         csrow->kobj.ktype = &ktype_csrow;
 563
 564         /* name this instance of csrow<id> */
 565         err = kobject_set_name(&csrow->kobj,"csrow%d",index);
 566         if (err)
 567                 goto error_exit;
 568
 569         /* Instanstiate the csrow object */
 570         err = kobject_register(&csrow->kobj);
 571         if (!err) {
 572                 /* Create the dyanmic attribute files on this csrow,
 573                  * namely, the DIMM labels and the channel ce_count
 574                  */
 575                 for (chan = 0; chan < csrow->nr_channels; chan++) {
 576                         err = edac_create_channel_files(&csrow->kobj,chan);
 577                         if (err)
 578                                 break;
 579                 }
 580         }
 581
 582 error_exit:
 583         return err;
 584 }
 585
 586 /* default sysfs methods and data structures for the main MCI kobject */
 587
 588 static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
 589                 const char *data, size_t count)
 590 {
 591         int row, chan;
 592
 593         mci->ue_noinfo_count = 0;
 594         mci->ce_noinfo_count = 0;
 595         mci->ue_count = 0;
 596         mci->ce_count = 0;
 597
 598         for (row = 0; row < mci->nr_csrows; row++) {
 599                 struct csrow_info *ri = &mci->csrows[row];
 600
 601                 ri->ue_count = 0;
 602                 ri->ce_count = 0;
 603
 604                 for (chan = 0; chan < ri->nr_channels; chan++)
 605                         ri->channels[chan].ce_count = 0;
 606         }
 607
 608         mci->start_time = jiffies;
 609         return count;
 610 }
 611
 612 /* memory scrubbing */
 613 static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci,
 614                                         const char *data, size_t count)
 615 {
 616         u32 bandwidth = -1;
 617
 618         if (mci->set_sdram_scrub_rate) {
 619
 620                 memctrl_int_store(&bandwidth, data, count);
 621
 622                 if (!(*mci->set_sdram_scrub_rate)(mci, &bandwidth)) {
 623                         edac_printk(KERN_DEBUG, EDAC_MC,
 624                                 "Scrub rate set successfully, applied: %d\n",
 625                                 bandwidth);
 626                 } else {
 627                         /* FIXME: error codes maybe? */
 628                         edac_printk(KERN_DEBUG, EDAC_MC,
 629                                 "Scrub rate set FAILED, could not apply: %d\n",
 630                                 bandwidth);
 631                 }
 632         } else {
 633                 /* FIXME: produce "not implemented" ERROR for user-side. */
 634                 edac_printk(KERN_WARNING, EDAC_MC,
 635                         "Memory scrubbing 'set'control is not implemented!\n");
 636         }
 637         return count;
 638 }
 639
 640 static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data)
 641 {
 642         u32 bandwidth = -1;
 643
 644         if (mci->get_sdram_scrub_rate) {
 645                 if (!(*mci->get_sdram_scrub_rate)(mci, &bandwidth)) {
 646                         edac_printk(KERN_DEBUG, EDAC_MC,
 647                                 "Scrub rate successfully, fetched: %d\n",
 648                                 bandwidth);
 649                 } else {
 650                         /* FIXME: error codes maybe? */
 651                         edac_printk(KERN_DEBUG, EDAC_MC,
 652                                 "Scrub rate fetch FAILED, got: %d\n",
 653                                 bandwidth);
 654                 }
 655         } else {
 656                 /* FIXME: produce "not implemented" ERROR for user-side.  */
 657                 edac_printk(KERN_WARNING, EDAC_MC,
 658                         "Memory scrubbing 'get' control is not implemented\n");
 659         }
 660         return sprintf(data, "%d\n", bandwidth);
 661 }
 662
 663 /* default attribute files for the MCI object */
 664 static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
 665 {
 666         return sprintf(data,"%d\n", mci->ue_count);
 667 }
 668
 669 static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
 670 {
 671         return sprintf(data,"%d\n", mci->ce_count);
 672 }
 673
 674 static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
 675 {
 676         return sprintf(data,"%d\n", mci->ce_noinfo_count);
 677 }
 678
 679 static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
 680 {
 681         return sprintf(data,"%d\n", mci->ue_noinfo_count);
 682 }
 683
 684 static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data)
 685 {
 686         return sprintf(data,"%ld\n", (jiffies - mci->start_time) / HZ);
 687 }
 688
 689 static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
 690 {
 691         return sprintf(data,"%s\n", mci->ctl_name);
 692 }
 693
 694 static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data)
 695 {
 696         int total_pages, csrow_idx;
 697
 698         for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows;
 699                         csrow_idx++) {
 700                 struct csrow_info *csrow = &mci->csrows[csrow_idx];
 701
 702                 if (!csrow->nr_pages)
 703                         continue;
 704
 705                 total_pages += csrow->nr_pages;
 706         }
 707
 708         return sprintf(data,"%u\n", PAGES_TO_MiB(total_pages));
 709 }
 710
 711 struct mcidev_attribute {
 712         struct attribute attr;
 713         ssize_t (*show)(struct mem_ctl_info *,char *);
 714         ssize_t (*store)(struct mem_ctl_info *, const char *,size_t);
 715 };
 716
 717 #define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
 718 #define to_mcidev_attr(a) container_of(a, struct mcidev_attribute, attr)
 719
 720 /* MCI show/store functions for top most object */
 721 static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
 722                 char *buffer)
 723 {
 724         struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
 725         struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr);
 726
 727         if (mcidev_attr->show)
 728                 return mcidev_attr->show(mem_ctl_info, buffer);
 729
 730         return -EIO;
 731 }
 732
 733 static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr,
 734                 const char *buffer, size_t count)
 735 {
 736         struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
 737         struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr);
 738
 739         if (mcidev_attr->store)
 740                 return mcidev_attr->store(mem_ctl_info, buffer, count);
 741
 742         return -EIO;
 743 }
 744
 745 static struct sysfs_ops mci_ops = {
 746         .show = mcidev_show,
 747         .store = mcidev_store
 748 };
 749
 750 #define MCIDEV_ATTR(_name,_mode,_show,_store)                   \
 751 static struct mcidev_attribute mci_attr_##_name = {                     \
 752         .attr = {.name = __stringify(_name), .mode = _mode },   \
 753         .show   = _show,                                        \
 754         .store  = _store,                                       \
 755 };
 756
 757 /* default Control file */
 758 MCIDEV_ATTR(reset_counters,S_IWUSR,NULL,mci_reset_counters_store);
 759
 760 /* default Attribute files */
 761 MCIDEV_ATTR(mc_name,S_IRUGO,mci_ctl_name_show,NULL);
 762 MCIDEV_ATTR(size_mb,S_IRUGO,mci_size_mb_show,NULL);
 763 MCIDEV_ATTR(seconds_since_reset,S_IRUGO,mci_seconds_show,NULL);
 764 MCIDEV_ATTR(ue_noinfo_count,S_IRUGO,mci_ue_noinfo_show,NULL);
 765 MCIDEV_ATTR(ce_noinfo_count,S_IRUGO,mci_ce_noinfo_show,NULL);
 766 MCIDEV_ATTR(ue_count,S_IRUGO,mci_ue_count_show,NULL);
 767 MCIDEV_ATTR(ce_count,S_IRUGO,mci_ce_count_show,NULL);
 768
 769 /* memory scrubber attribute file */
 770 MCIDEV_ATTR(sdram_scrub_rate,S_IRUGO|S_IWUSR,mci_sdram_scrub_rate_show,\
 771                         mci_sdram_scrub_rate_store);
 772
 773 static struct mcidev_attribute *mci_attr[] = {
 774         &mci_attr_reset_counters,
 775         &mci_attr_mc_name,
 776         &mci_attr_size_mb,
 777         &mci_attr_seconds_since_reset,
 778         &mci_attr_ue_noinfo_count,
 779         &mci_attr_ce_noinfo_count,
 780         &mci_attr_ue_count,
 781         &mci_attr_ce_count,
 782         &mci_attr_sdram_scrub_rate,
 783         NULL
 784 };
 785
 786 /*
 787  * Release of a MC controlling instance
 788  */
 789 static void edac_mci_instance_release(struct kobject *kobj)
 790 {
 791         struct mem_ctl_info *mci;
 792
 793         mci = to_mci(kobj);
 794         debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
 795         complete(&mci->kobj_complete);
 796 }
 797
 798 static struct kobj_type ktype_mci = {
 799         .release = edac_mci_instance_release,
 800         .sysfs_ops = &mci_ops,
 801         .default_attrs = (struct attribute **) mci_attr,
 802 };
 803
 804
 805 #define EDAC_DEVICE_SYMLINK     "device"
 806
 807 /*
 808  * Create a new Memory Controller kobject instance,
 809  *      mc<id> under the 'mc' directory
 810  *
 811  * Return:
 812  *      0       Success
 813  *      !0      Failure
 814  */
 815 int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
 816 {
 817         int i;
 818         int err;
 819         struct csrow_info *csrow;
 820         struct kobject *edac_mci_kobj=&mci->edac_mci_kobj;
 821
 822         debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
 823         memset(edac_mci_kobj, 0, sizeof(*edac_mci_kobj));
 824
 825         /* set the name of the mc<id> object */
 826         err = kobject_set_name(edac_mci_kobj,"mc%d",mci->mc_idx);
 827         if (err)
 828                 return err;
 829
 830         /* link to our parent the '..../edac/mc' object */
 831         edac_mci_kobj->parent = &edac_memctrl_kobj;
 832         edac_mci_kobj->ktype = &ktype_mci;
 833
 834         /* register the mc<id> kobject */
 835         err = kobject_register(edac_mci_kobj);
 836         if (err)
 837                 return err;
 838
 839         /* create a symlink for the device */
 840         err = sysfs_create_link(edac_mci_kobj, &mci->dev->kobj,
 841                                 EDAC_DEVICE_SYMLINK);
 842         if (err)
 843                 goto fail0;
 844
 845         /* Make directories for each CSROW object
 846          * under the mc<id> kobject
 847          */
 848         for (i = 0; i < mci->nr_csrows; i++) {
 849                 csrow = &mci->csrows[i];
 850
 851                 /* Only expose populated CSROWs */
 852                 if (csrow->nr_pages > 0) {
 853                         err = edac_create_csrow_object(edac_mci_kobj,csrow,i);
 854                         if (err)
 855                                 goto fail1;
 856                 }
 857         }
 858
 859         return 0;
 860
 861         /* CSROW error: backout what has already been registered,  */
 862 fail1:
 863         for ( i--; i >= 0; i--) {
 864                 if (csrow->nr_pages > 0) {
 865                         init_completion(&csrow->kobj_complete);
 866                         kobject_unregister(&mci->csrows[i].kobj);
 867                         wait_for_completion(&csrow->kobj_complete);
 868                 }
 869         }
 870
 871 fail0:
 872         init_completion(&mci->kobj_complete);
 873         kobject_unregister(edac_mci_kobj);
 874         wait_for_completion(&mci->kobj_complete);
 875         return err;
 876 }
 877
 878 /*
 879  * remove a Memory Controller instance
 880  */
 881 void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
 882 {
 883         int i;
 884
 885         debugf0("%s()\n", __func__);
 886
 887         /* remove all csrow kobjects */
 888         for (i = 0; i < mci->nr_csrows; i++) {
 889                 if (mci->csrows[i].nr_pages > 0) {
 890                         init_completion(&mci->csrows[i].kobj_complete);
 891                         kobject_unregister(&mci->csrows[i].kobj);
 892                         wait_for_completion(&mci->csrows[i].kobj_complete);
 893                 }
 894         }
 895
 896         sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
 897         init_completion(&mci->kobj_complete);
 898         kobject_unregister(&mci->edac_mci_kobj);
 899         wait_for_completion(&mci->kobj_complete);
 900 }
 901
 902