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