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