drivers/edac/edac_mc_sysfs.c

   1 /*
   2  * edac_mc kernel module
   3  * (C) 2005-2007 Linux Networx (http://lnxi.com)
   4  *
   5  * This file may be distributed under the terms of the
   6  * GNU General Public License.
   7  *
   8  * Written Doug Thompson <norsk5@xmission.com> www.softwarebitmaker.com
   9  *
  10  * (c) 2012-2013 - Mauro Carvalho Chehab
  11  *      The entire API were re-written, and ported to use struct device
  12  *
  13  */
  14
  15 #include <linux/ctype.h>
  16 #include <linux/slab.h>
  17 #include <linux/edac.h>
  18 #include <linux/bug.h>
  19 #include <linux/pm_runtime.h>
  20 #include <linux/uaccess.h>
  21
  22 #include "edac_mc.h"
  23 #include "edac_module.h"
  24
  25 /* MC EDAC Controls, setable by module parameter, and sysfs */
  26 static int edac_mc_log_ue = 1;
  27 static int edac_mc_log_ce = 1;
  28 static int edac_mc_panic_on_ue;
  29 static int edac_mc_poll_msec = 1000;
  30
  31 /* Getter functions for above */
  32 int edac_mc_get_log_ue(void)
  33 {
  34         return edac_mc_log_ue;
  35 }
  36
  37 int edac_mc_get_log_ce(void)
  38 {
  39         return edac_mc_log_ce;
  40 }
  41
  42 int edac_mc_get_panic_on_ue(void)
  43 {
  44         return edac_mc_panic_on_ue;
  45 }
  46
  47 /* this is temporary */
  48 int edac_mc_get_poll_msec(void)
  49 {
  50         return edac_mc_poll_msec;
  51 }
  52
  53 static int edac_set_poll_msec(const char *val, const struct kernel_param *kp)
  54 {
  55         unsigned long l;
  56         int ret;
  57
  58         if (!val)
  59                 return -EINVAL;
  60
  61         ret = kstrtoul(val, 0, &l);
  62         if (ret)
  63                 return ret;
  64
  65         if (l < 1000)
  66                 return -EINVAL;
  67
  68         *((unsigned long *)kp->arg) = l;
  69
  70         /* notify edac_mc engine to reset the poll period */
  71         edac_mc_reset_delay_period(l);
  72
  73         return 0;
  74 }
  75
  76 /* Parameter declarations for above */
  77 module_param(edac_mc_panic_on_ue, int, 0644);
  78 MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
  79 module_param(edac_mc_log_ue, int, 0644);
  80 MODULE_PARM_DESC(edac_mc_log_ue,
  81                  "Log uncorrectable error to console: 0=off 1=on");
  82 module_param(edac_mc_log_ce, int, 0644);
  83 MODULE_PARM_DESC(edac_mc_log_ce,
  84                  "Log correctable error to console: 0=off 1=on");
  85 module_param_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_int,
  86                   &edac_mc_poll_msec, 0644);
  87 MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
  88
  89 static struct device *mci_pdev;
  90
  91 /*
  92  * various constants for Memory Controllers
  93  */
  94 static const char * const dev_types[] = {
  95         [DEV_UNKNOWN] = "Unknown",
  96         [DEV_X1] = "x1",
  97         [DEV_X2] = "x2",
  98         [DEV_X4] = "x4",
  99         [DEV_X8] = "x8",
 100         [DEV_X16] = "x16",
 101         [DEV_X32] = "x32",
 102         [DEV_X64] = "x64"
 103 };
 104
 105 static const char * const edac_caps[] = {
 106         [EDAC_UNKNOWN] = "Unknown",
 107         [EDAC_NONE] = "None",
 108         [EDAC_RESERVED] = "Reserved",
 109         [EDAC_PARITY] = "PARITY",
 110         [EDAC_EC] = "EC",
 111         [EDAC_SECDED] = "SECDED",
 112         [EDAC_S2ECD2ED] = "S2ECD2ED",
 113         [EDAC_S4ECD4ED] = "S4ECD4ED",
 114         [EDAC_S8ECD8ED] = "S8ECD8ED",
 115         [EDAC_S16ECD16ED] = "S16ECD16ED"
 116 };
 117
 118 #ifdef CONFIG_EDAC_LEGACY_SYSFS
 119 /*
 120  * EDAC sysfs CSROW data structures and methods
 121  */
 122
 123 #define to_csrow(k) container_of(k, struct csrow_info, dev)
 124
 125 /*
 126  * We need it to avoid namespace conflicts between the legacy API
 127  * and the per-dimm/per-rank one
 128  */
 129 #define DEVICE_ATTR_LEGACY(_name, _mode, _show, _store) \
 130         static struct device_attribute dev_attr_legacy_##_name = __ATTR(_name, _mode, _show, _store)
 131
 132 struct dev_ch_attribute {
 133         struct device_attribute attr;
 134         int channel;
 135 };
 136
 137 #define DEVICE_CHANNEL(_name, _mode, _show, _store, _var) \
 138         static struct dev_ch_attribute dev_attr_legacy_##_name = \
 139                 { __ATTR(_name, _mode, _show, _store), (_var) }
 140
 141 #define to_channel(k) (container_of(k, struct dev_ch_attribute, attr)->channel)
 142
 143 /* Set of more default csrow<id> attribute show/store functions */
 144 static ssize_t csrow_ue_count_show(struct device *dev,
 145                                    struct device_attribute *mattr, char *data)
 146 {
 147         struct csrow_info *csrow = to_csrow(dev);
 148
 149         return sprintf(data, "%u\n", csrow->ue_count);
 150 }
 151
 152 static ssize_t csrow_ce_count_show(struct device *dev,
 153                                    struct device_attribute *mattr, char *data)
 154 {
 155         struct csrow_info *csrow = to_csrow(dev);
 156
 157         return sprintf(data, "%u\n", csrow->ce_count);
 158 }
 159
 160 static ssize_t csrow_size_show(struct device *dev,
 161                                struct device_attribute *mattr, char *data)
 162 {
 163         struct csrow_info *csrow = to_csrow(dev);
 164         int i;
 165         u32 nr_pages = 0;
 166
 167         for (i = 0; i < csrow->nr_channels; i++)
 168                 nr_pages += csrow->channels[i]->dimm->nr_pages;
 169         return sprintf(data, "%u\n", PAGES_TO_MiB(nr_pages));
 170 }
 171
 172 static ssize_t csrow_mem_type_show(struct device *dev,
 173                                    struct device_attribute *mattr, char *data)
 174 {
 175         struct csrow_info *csrow = to_csrow(dev);
 176
 177         return sprintf(data, "%s\n", edac_mem_types[csrow->channels[0]->dimm->mtype]);
 178 }
 179
 180 static ssize_t csrow_dev_type_show(struct device *dev,
 181                                    struct device_attribute *mattr, char *data)
 182 {
 183         struct csrow_info *csrow = to_csrow(dev);
 184
 185         return sprintf(data, "%s\n", dev_types[csrow->channels[0]->dimm->dtype]);
 186 }
 187
 188 static ssize_t csrow_edac_mode_show(struct device *dev,
 189                                     struct device_attribute *mattr,
 190                                     char *data)
 191 {
 192         struct csrow_info *csrow = to_csrow(dev);
 193
 194         return sprintf(data, "%s\n", edac_caps[csrow->channels[0]->dimm->edac_mode]);
 195 }
 196
 197 /* show/store functions for DIMM Label attributes */
 198 static ssize_t channel_dimm_label_show(struct device *dev,
 199                                        struct device_attribute *mattr,
 200                                        char *data)
 201 {
 202         struct csrow_info *csrow = to_csrow(dev);
 203         unsigned chan = to_channel(mattr);
 204         struct rank_info *rank = csrow->channels[chan];
 205
 206         /* if field has not been initialized, there is nothing to send */
 207         if (!rank->dimm->label[0])
 208                 return 0;
 209
 210         return snprintf(data, sizeof(rank->dimm->label) + 1, "%s\n",
 211                         rank->dimm->label);
 212 }
 213
 214 static ssize_t channel_dimm_label_store(struct device *dev,
 215                                         struct device_attribute *mattr,
 216                                         const char *data, size_t count)
 217 {
 218         struct csrow_info *csrow = to_csrow(dev);
 219         unsigned chan = to_channel(mattr);
 220         struct rank_info *rank = csrow->channels[chan];
 221         size_t copy_count = count;
 222
 223         if (count == 0)
 224                 return -EINVAL;
 225
 226         if (data[count - 1] == '\0' || data[count - 1] == '\n')
 227                 copy_count -= 1;
 228
 229         if (copy_count == 0 || copy_count >= sizeof(rank->dimm->label))
 230                 return -EINVAL;
 231
 232         strncpy(rank->dimm->label, data, copy_count);
 233         rank->dimm->label[copy_count] = '\0';
 234
 235         return count;
 236 }
 237
 238 /* show function for dynamic chX_ce_count attribute */
 239 static ssize_t channel_ce_count_show(struct device *dev,
 240                                      struct device_attribute *mattr, char *data)
 241 {
 242         struct csrow_info *csrow = to_csrow(dev);
 243         unsigned chan = to_channel(mattr);
 244         struct rank_info *rank = csrow->channels[chan];
 245
 246         return sprintf(data, "%u\n", rank->ce_count);
 247 }
 248
 249 /* cwrow<id>/attribute files */
 250 DEVICE_ATTR_LEGACY(size_mb, S_IRUGO, csrow_size_show, NULL);
 251 DEVICE_ATTR_LEGACY(dev_type, S_IRUGO, csrow_dev_type_show, NULL);
 252 DEVICE_ATTR_LEGACY(mem_type, S_IRUGO, csrow_mem_type_show, NULL);
 253 DEVICE_ATTR_LEGACY(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL);
 254 DEVICE_ATTR_LEGACY(ue_count, S_IRUGO, csrow_ue_count_show, NULL);
 255 DEVICE_ATTR_LEGACY(ce_count, S_IRUGO, csrow_ce_count_show, NULL);
 256
 257 /* default attributes of the CSROW<id> object */
 258 static struct attribute *csrow_attrs[] = {
 259         &dev_attr_legacy_dev_type.attr,
 260         &dev_attr_legacy_mem_type.attr,
 261         &dev_attr_legacy_edac_mode.attr,
 262         &dev_attr_legacy_size_mb.attr,
 263         &dev_attr_legacy_ue_count.attr,
 264         &dev_attr_legacy_ce_count.attr,
 265         NULL,
 266 };
 267
 268 static const struct attribute_group csrow_attr_grp = {
 269         .attrs  = csrow_attrs,
 270 };
 271
 272 static const struct attribute_group *csrow_attr_groups[] = {
 273         &csrow_attr_grp,
 274         NULL
 275 };
 276
 277 static void csrow_attr_release(struct device *dev)
 278 {
 279         struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);
 280
 281         edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev));
 282         kfree(csrow);
 283 }
 284
 285 static const struct device_type csrow_attr_type = {
 286         .groups         = csrow_attr_groups,
 287         .release        = csrow_attr_release,
 288 };
 289
 290 /*
 291  * possible dynamic channel DIMM Label attribute files
 292  *
 293  */
 294 DEVICE_CHANNEL(ch0_dimm_label, S_IRUGO | S_IWUSR,
 295         channel_dimm_label_show, channel_dimm_label_store, 0);
 296 DEVICE_CHANNEL(ch1_dimm_label, S_IRUGO | S_IWUSR,
 297         channel_dimm_label_show, channel_dimm_label_store, 1);
 298 DEVICE_CHANNEL(ch2_dimm_label, S_IRUGO | S_IWUSR,
 299         channel_dimm_label_show, channel_dimm_label_store, 2);
 300 DEVICE_CHANNEL(ch3_dimm_label, S_IRUGO | S_IWUSR,
 301         channel_dimm_label_show, channel_dimm_label_store, 3);
 302 DEVICE_CHANNEL(ch4_dimm_label, S_IRUGO | S_IWUSR,
 303         channel_dimm_label_show, channel_dimm_label_store, 4);
 304 DEVICE_CHANNEL(ch5_dimm_label, S_IRUGO | S_IWUSR,
 305         channel_dimm_label_show, channel_dimm_label_store, 5);
 306 DEVICE_CHANNEL(ch6_dimm_label, S_IRUGO | S_IWUSR,
 307         channel_dimm_label_show, channel_dimm_label_store, 6);
 308 DEVICE_CHANNEL(ch7_dimm_label, S_IRUGO | S_IWUSR,
 309         channel_dimm_label_show, channel_dimm_label_store, 7);
 310
 311 /* Total possible dynamic DIMM Label attribute file table */
 312 static struct attribute *dynamic_csrow_dimm_attr[] = {
 313         &dev_attr_legacy_ch0_dimm_label.attr.attr,
 314         &dev_attr_legacy_ch1_dimm_label.attr.attr,
 315         &dev_attr_legacy_ch2_dimm_label.attr.attr,
 316         &dev_attr_legacy_ch3_dimm_label.attr.attr,
 317         &dev_attr_legacy_ch4_dimm_label.attr.attr,
 318         &dev_attr_legacy_ch5_dimm_label.attr.attr,
 319         &dev_attr_legacy_ch6_dimm_label.attr.attr,
 320         &dev_attr_legacy_ch7_dimm_label.attr.attr,
 321         NULL
 322 };
 323
 324 /* possible dynamic channel ce_count attribute files */
 325 DEVICE_CHANNEL(ch0_ce_count, S_IRUGO,
 326                    channel_ce_count_show, NULL, 0);
 327 DEVICE_CHANNEL(ch1_ce_count, S_IRUGO,
 328                    channel_ce_count_show, NULL, 1);
 329 DEVICE_CHANNEL(ch2_ce_count, S_IRUGO,
 330                    channel_ce_count_show, NULL, 2);
 331 DEVICE_CHANNEL(ch3_ce_count, S_IRUGO,
 332                    channel_ce_count_show, NULL, 3);
 333 DEVICE_CHANNEL(ch4_ce_count, S_IRUGO,
 334                    channel_ce_count_show, NULL, 4);
 335 DEVICE_CHANNEL(ch5_ce_count, S_IRUGO,
 336                    channel_ce_count_show, NULL, 5);
 337 DEVICE_CHANNEL(ch6_ce_count, S_IRUGO,
 338                    channel_ce_count_show, NULL, 6);
 339 DEVICE_CHANNEL(ch7_ce_count, S_IRUGO,
 340                    channel_ce_count_show, NULL, 7);
 341
 342 /* Total possible dynamic ce_count attribute file table */
 343 static struct attribute *dynamic_csrow_ce_count_attr[] = {
 344         &dev_attr_legacy_ch0_ce_count.attr.attr,
 345         &dev_attr_legacy_ch1_ce_count.attr.attr,
 346         &dev_attr_legacy_ch2_ce_count.attr.attr,
 347         &dev_attr_legacy_ch3_ce_count.attr.attr,
 348         &dev_attr_legacy_ch4_ce_count.attr.attr,
 349         &dev_attr_legacy_ch5_ce_count.attr.attr,
 350         &dev_attr_legacy_ch6_ce_count.attr.attr,
 351         &dev_attr_legacy_ch7_ce_count.attr.attr,
 352         NULL
 353 };
 354
 355 static umode_t csrow_dev_is_visible(struct kobject *kobj,
 356                                     struct attribute *attr, int idx)
 357 {
 358         struct device *dev = kobj_to_dev(kobj);
 359         struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);
 360
 361         if (idx >= csrow->nr_channels)
 362                 return 0;
 363
 364         if (idx >= ARRAY_SIZE(dynamic_csrow_ce_count_attr) - 1) {
 365                 WARN_ONCE(1, "idx: %d\n", idx);
 366                 return 0;
 367         }
 368
 369         /* Only expose populated DIMMs */
 370         if (!csrow->channels[idx]->dimm->nr_pages)
 371                 return 0;
 372
 373         return attr->mode;
 374 }
 375
 376
 377 static const struct attribute_group csrow_dev_dimm_group = {
 378         .attrs = dynamic_csrow_dimm_attr,
 379         .is_visible = csrow_dev_is_visible,
 380 };
 381
 382 static const struct attribute_group csrow_dev_ce_count_group = {
 383         .attrs = dynamic_csrow_ce_count_attr,
 384         .is_visible = csrow_dev_is_visible,
 385 };
 386
 387 static const struct attribute_group *csrow_dev_groups[] = {
 388         &csrow_dev_dimm_group,
 389         &csrow_dev_ce_count_group,
 390         NULL
 391 };
 392
 393 static inline int nr_pages_per_csrow(struct csrow_info *csrow)
 394 {
 395         int chan, nr_pages = 0;
 396
 397         for (chan = 0; chan < csrow->nr_channels; chan++)
 398                 nr_pages += csrow->channels[chan]->dimm->nr_pages;
 399
 400         return nr_pages;
 401 }
 402
 403 /* Create a CSROW object under specifed edac_mc_device */
 404 static int edac_create_csrow_object(struct mem_ctl_info *mci,
 405                                     struct csrow_info *csrow, int index)
 406 {
 407         csrow->dev.type = &csrow_attr_type;
 408         csrow->dev.groups = csrow_dev_groups;
 409         device_initialize(&csrow->dev);
 410         csrow->dev.parent = &mci->dev;
 411         csrow->mci = mci;
 412         dev_set_name(&csrow->dev, "csrow%d", index);
 413         dev_set_drvdata(&csrow->dev, csrow);
 414
 415         edac_dbg(0, "creating (virtual) csrow node %s\n",
 416                  dev_name(&csrow->dev));
 417
 418         return device_add(&csrow->dev);
 419 }
 420
 421 /* Create a CSROW object under specifed edac_mc_device */
 422 static int edac_create_csrow_objects(struct mem_ctl_info *mci)
 423 {
 424         int err, i;
 425         struct csrow_info *csrow;
 426
 427         for (i = 0; i < mci->nr_csrows; i++) {
 428                 csrow = mci->csrows[i];
 429                 if (!nr_pages_per_csrow(csrow))
 430                         continue;
 431                 err = edac_create_csrow_object(mci, mci->csrows[i], i);
 432                 if (err < 0) {
 433                         edac_dbg(1,
 434                                  "failure: create csrow objects for csrow %d\n",
 435                                  i);
 436                         goto error;
 437                 }
 438         }
 439         return 0;
 440
 441 error:
 442         for (--i; i >= 0; i--) {
 443                 csrow = mci->csrows[i];
 444                 if (!nr_pages_per_csrow(csrow))
 445                         continue;
 446                 put_device(&mci->csrows[i]->dev);
 447         }
 448
 449         return err;
 450 }
 451
 452 static void edac_delete_csrow_objects(struct mem_ctl_info *mci)
 453 {
 454         int i;
 455         struct csrow_info *csrow;
 456
 457         for (i = mci->nr_csrows - 1; i >= 0; i--) {
 458                 csrow = mci->csrows[i];
 459                 if (!nr_pages_per_csrow(csrow))
 460                         continue;
 461                 device_unregister(&mci->csrows[i]->dev);
 462         }
 463 }
 464 #endif
 465
 466 /*
 467  * Per-dimm (or per-rank) devices
 468  */
 469
 470 #define to_dimm(k) container_of(k, struct dimm_info, dev)
 471
 472 /* show/store functions for DIMM Label attributes */
 473 static ssize_t dimmdev_location_show(struct device *dev,
 474                                      struct device_attribute *mattr, char *data)
 475 {
 476         struct dimm_info *dimm = to_dimm(dev);
 477
 478         return edac_dimm_info_location(dimm, data, PAGE_SIZE);
 479 }
 480
 481 static ssize_t dimmdev_label_show(struct device *dev,
 482                                   struct device_attribute *mattr, char *data)
 483 {
 484         struct dimm_info *dimm = to_dimm(dev);
 485
 486         /* if field has not been initialized, there is nothing to send */
 487         if (!dimm->label[0])
 488                 return 0;
 489
 490         return snprintf(data, sizeof(dimm->label) + 1, "%s\n", dimm->label);
 491 }
 492
 493 static ssize_t dimmdev_label_store(struct device *dev,
 494                                    struct device_attribute *mattr,
 495                                    const char *data,
 496                                    size_t count)
 497 {
 498         struct dimm_info *dimm = to_dimm(dev);
 499         size_t copy_count = count;
 500
 501         if (count == 0)
 502                 return -EINVAL;
 503
 504         if (data[count - 1] == '\0' || data[count - 1] == '\n')
 505                 copy_count -= 1;
 506
 507         if (copy_count == 0 || copy_count >= sizeof(dimm->label))
 508                 return -EINVAL;
 509
 510         strncpy(dimm->label, data, copy_count);
 511         dimm->label[copy_count] = '\0';
 512
 513         return count;
 514 }
 515
 516 static ssize_t dimmdev_size_show(struct device *dev,
 517                                  struct device_attribute *mattr, char *data)
 518 {
 519         struct dimm_info *dimm = to_dimm(dev);
 520
 521         return sprintf(data, "%u\n", PAGES_TO_MiB(dimm->nr_pages));
 522 }
 523
 524 static ssize_t dimmdev_mem_type_show(struct device *dev,
 525                                      struct device_attribute *mattr, char *data)
 526 {
 527         struct dimm_info *dimm = to_dimm(dev);
 528
 529         return sprintf(data, "%s\n", edac_mem_types[dimm->mtype]);
 530 }
 531
 532 static ssize_t dimmdev_dev_type_show(struct device *dev,
 533                                      struct device_attribute *mattr, char *data)
 534 {
 535         struct dimm_info *dimm = to_dimm(dev);
 536
 537         return sprintf(data, "%s\n", dev_types[dimm->dtype]);
 538 }
 539
 540 static ssize_t dimmdev_edac_mode_show(struct device *dev,
 541                                       struct device_attribute *mattr,
 542                                       char *data)
 543 {
 544         struct dimm_info *dimm = to_dimm(dev);
 545
 546         return sprintf(data, "%s\n", edac_caps[dimm->edac_mode]);
 547 }
 548
 549 static ssize_t dimmdev_ce_count_show(struct device *dev,
 550                                       struct device_attribute *mattr,
 551                                       char *data)
 552 {
 553         struct dimm_info *dimm = to_dimm(dev);
 554         u32 count;
 555         int off;
 556
 557         off = EDAC_DIMM_OFF(dimm->mci->layers,
 558                             dimm->mci->n_layers,
 559                             dimm->location[0],
 560                             dimm->location[1],
 561                             dimm->location[2]);
 562         count = dimm->mci->ce_per_layer[dimm->mci->n_layers-1][off];
 563         return sprintf(data, "%u\n", count);
 564 }
 565
 566 static ssize_t dimmdev_ue_count_show(struct device *dev,
 567                                       struct device_attribute *mattr,
 568                                       char *data)
 569 {
 570         struct dimm_info *dimm = to_dimm(dev);
 571         u32 count;
 572         int off;
 573
 574         off = EDAC_DIMM_OFF(dimm->mci->layers,
 575                             dimm->mci->n_layers,
 576                             dimm->location[0],
 577                             dimm->location[1],
 578                             dimm->location[2]);
 579         count = dimm->mci->ue_per_layer[dimm->mci->n_layers-1][off];
 580         return sprintf(data, "%u\n", count);
 581 }
 582
 583 /* dimm/rank attribute files */
 584 static DEVICE_ATTR(dimm_label, S_IRUGO | S_IWUSR,
 585                    dimmdev_label_show, dimmdev_label_store);
 586 static DEVICE_ATTR(dimm_location, S_IRUGO, dimmdev_location_show, NULL);
 587 static DEVICE_ATTR(size, S_IRUGO, dimmdev_size_show, NULL);
 588 static DEVICE_ATTR(dimm_mem_type, S_IRUGO, dimmdev_mem_type_show, NULL);
 589 static DEVICE_ATTR(dimm_dev_type, S_IRUGO, dimmdev_dev_type_show, NULL);
 590 static DEVICE_ATTR(dimm_edac_mode, S_IRUGO, dimmdev_edac_mode_show, NULL);
 591 static DEVICE_ATTR(dimm_ce_count, S_IRUGO, dimmdev_ce_count_show, NULL);
 592 static DEVICE_ATTR(dimm_ue_count, S_IRUGO, dimmdev_ue_count_show, NULL);
 593
 594 /* attributes of the dimm<id>/rank<id> object */
 595 static struct attribute *dimm_attrs[] = {
 596         &dev_attr_dimm_label.attr,
 597         &dev_attr_dimm_location.attr,
 598         &dev_attr_size.attr,
 599         &dev_attr_dimm_mem_type.attr,
 600         &dev_attr_dimm_dev_type.attr,
 601         &dev_attr_dimm_edac_mode.attr,
 602         &dev_attr_dimm_ce_count.attr,
 603         &dev_attr_dimm_ue_count.attr,
 604         NULL,
 605 };
 606
 607 static const struct attribute_group dimm_attr_grp = {
 608         .attrs  = dimm_attrs,
 609 };
 610
 611 static const struct attribute_group *dimm_attr_groups[] = {
 612         &dimm_attr_grp,
 613         NULL
 614 };
 615
 616 static void dimm_attr_release(struct device *dev)
 617 {
 618         struct dimm_info *dimm = container_of(dev, struct dimm_info, dev);
 619
 620         edac_dbg(1, "Releasing dimm device %s\n", dev_name(dev));
 621         kfree(dimm);
 622 }
 623
 624 static const struct device_type dimm_attr_type = {
 625         .groups         = dimm_attr_groups,
 626         .release        = dimm_attr_release,
 627 };
 628
 629 /* Create a DIMM object under specifed memory controller device */
 630 static int edac_create_dimm_object(struct mem_ctl_info *mci,
 631                                    struct dimm_info *dimm,
 632                                    int index)
 633 {
 634         int err;
 635         dimm->mci = mci;
 636
 637         dimm->dev.type = &dimm_attr_type;
 638         device_initialize(&dimm->dev);
 639
 640         dimm->dev.parent = &mci->dev;
 641         if (mci->csbased)
 642                 dev_set_name(&dimm->dev, "rank%d", index);
 643         else
 644                 dev_set_name(&dimm->dev, "dimm%d", index);
 645         dev_set_drvdata(&dimm->dev, dimm);
 646         pm_runtime_forbid(&mci->dev);
 647
 648         err =  device_add(&dimm->dev);
 649
 650         edac_dbg(0, "creating rank/dimm device %s\n", dev_name(&dimm->dev));
 651
 652         return err;
 653 }
 654
 655 /*
 656  * Memory controller device
 657  */
 658
 659 #define to_mci(k) container_of(k, struct mem_ctl_info, dev)
 660
 661 static ssize_t mci_reset_counters_store(struct device *dev,
 662                                         struct device_attribute *mattr,
 663                                         const char *data, size_t count)
 664 {
 665         struct mem_ctl_info *mci = to_mci(dev);
 666         int cnt, row, chan, i;
 667         mci->ue_mc = 0;
 668         mci->ce_mc = 0;
 669         mci->ue_noinfo_count = 0;
 670         mci->ce_noinfo_count = 0;
 671
 672         for (row = 0; row < mci->nr_csrows; row++) {
 673                 struct csrow_info *ri = mci->csrows[row];
 674
 675                 ri->ue_count = 0;
 676                 ri->ce_count = 0;
 677
 678                 for (chan = 0; chan < ri->nr_channels; chan++)
 679                         ri->channels[chan]->ce_count = 0;
 680         }
 681
 682         cnt = 1;
 683         for (i = 0; i < mci->n_layers; i++) {
 684                 cnt *= mci->layers[i].size;
 685                 memset(mci->ce_per_layer[i], 0, cnt * sizeof(u32));
 686                 memset(mci->ue_per_layer[i], 0, cnt * sizeof(u32));
 687         }
 688
 689         mci->start_time = jiffies;
 690         return count;
 691 }
 692
 693 /* Memory scrubbing interface:
 694  *
 695  * A MC driver can limit the scrubbing bandwidth based on the CPU type.
 696  * Therefore, ->set_sdram_scrub_rate should be made to return the actual
 697  * bandwidth that is accepted or 0 when scrubbing is to be disabled.
 698  *
 699  * Negative value still means that an error has occurred while setting
 700  * the scrub rate.
 701  */
 702 static ssize_t mci_sdram_scrub_rate_store(struct device *dev,
 703                                           struct device_attribute *mattr,
 704                                           const char *data, size_t count)
 705 {
 706         struct mem_ctl_info *mci = to_mci(dev);
 707         unsigned long bandwidth = 0;
 708         int new_bw = 0;
 709
 710         if (kstrtoul(data, 10, &bandwidth) < 0)
 711                 return -EINVAL;
 712
 713         new_bw = mci->set_sdram_scrub_rate(mci, bandwidth);
 714         if (new_bw < 0) {
 715                 edac_printk(KERN_WARNING, EDAC_MC,
 716                             "Error setting scrub rate to: %lu\n", bandwidth);
 717                 return -EINVAL;
 718         }
 719
 720         return count;
 721 }
 722
 723 /*
 724  * ->get_sdram_scrub_rate() return value semantics same as above.
 725  */
 726 static ssize_t mci_sdram_scrub_rate_show(struct device *dev,
 727                                          struct device_attribute *mattr,
 728                                          char *data)
 729 {
 730         struct mem_ctl_info *mci = to_mci(dev);
 731         int bandwidth = 0;
 732
 733         bandwidth = mci->get_sdram_scrub_rate(mci);
 734         if (bandwidth < 0) {
 735                 edac_printk(KERN_DEBUG, EDAC_MC, "Error reading scrub rate\n");
 736                 return bandwidth;
 737         }
 738
 739         return sprintf(data, "%d\n", bandwidth);
 740 }
 741
 742 /* default attribute files for the MCI object */
 743 static ssize_t mci_ue_count_show(struct device *dev,
 744                                  struct device_attribute *mattr,
 745                                  char *data)
 746 {
 747         struct mem_ctl_info *mci = to_mci(dev);
 748
 749         return sprintf(data, "%d\n", mci->ue_mc);
 750 }
 751
 752 static ssize_t mci_ce_count_show(struct device *dev,
 753                                  struct device_attribute *mattr,
 754                                  char *data)
 755 {
 756         struct mem_ctl_info *mci = to_mci(dev);
 757
 758         return sprintf(data, "%d\n", mci->ce_mc);
 759 }
 760
 761 static ssize_t mci_ce_noinfo_show(struct device *dev,
 762                                   struct device_attribute *mattr,
 763                                   char *data)
 764 {
 765         struct mem_ctl_info *mci = to_mci(dev);
 766
 767         return sprintf(data, "%d\n", mci->ce_noinfo_count);
 768 }
 769
 770 static ssize_t mci_ue_noinfo_show(struct device *dev,
 771                                   struct device_attribute *mattr,
 772                                   char *data)
 773 {
 774         struct mem_ctl_info *mci = to_mci(dev);
 775
 776         return sprintf(data, "%d\n", mci->ue_noinfo_count);
 777 }
 778
 779 static ssize_t mci_seconds_show(struct device *dev,
 780                                 struct device_attribute *mattr,
 781                                 char *data)
 782 {
 783         struct mem_ctl_info *mci = to_mci(dev);
 784
 785         return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
 786 }
 787
 788 static ssize_t mci_ctl_name_show(struct device *dev,
 789                                  struct device_attribute *mattr,
 790                                  char *data)
 791 {
 792         struct mem_ctl_info *mci = to_mci(dev);
 793
 794         return sprintf(data, "%s\n", mci->ctl_name);
 795 }
 796
 797 static ssize_t mci_size_mb_show(struct device *dev,
 798                                 struct device_attribute *mattr,
 799                                 char *data)
 800 {
 801         struct mem_ctl_info *mci = to_mci(dev);
 802         int total_pages = 0, csrow_idx, j;
 803
 804         for (csrow_idx = 0; csrow_idx < mci->nr_csrows; csrow_idx++) {
 805                 struct csrow_info *csrow = mci->csrows[csrow_idx];
 806
 807                 for (j = 0; j < csrow->nr_channels; j++) {
 808                         struct dimm_info *dimm = csrow->channels[j]->dimm;
 809
 810                         total_pages += dimm->nr_pages;
 811                 }
 812         }
 813
 814         return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
 815 }
 816
 817 static ssize_t mci_max_location_show(struct device *dev,
 818                                      struct device_attribute *mattr,
 819                                      char *data)
 820 {
 821         struct mem_ctl_info *mci = to_mci(dev);
 822         int i;
 823         char *p = data;
 824
 825         for (i = 0; i < mci->n_layers; i++) {
 826                 p += sprintf(p, "%s %d ",
 827                              edac_layer_name[mci->layers[i].type],
 828                              mci->layers[i].size - 1);
 829         }
 830
 831         return p - data;
 832 }
 833
 834 /* default Control file */
 835 static DEVICE_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
 836
 837 /* default Attribute files */
 838 static DEVICE_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
 839 static DEVICE_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
 840 static DEVICE_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
 841 static DEVICE_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
 842 static DEVICE_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
 843 static DEVICE_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
 844 static DEVICE_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
 845 static DEVICE_ATTR(max_location, S_IRUGO, mci_max_location_show, NULL);
 846
 847 /* memory scrubber attribute file */
 848 static DEVICE_ATTR(sdram_scrub_rate, 0, mci_sdram_scrub_rate_show,
 849             mci_sdram_scrub_rate_store); /* umode set later in is_visible */
 850
 851 static struct attribute *mci_attrs[] = {
 852         &dev_attr_reset_counters.attr,
 853         &dev_attr_mc_name.attr,
 854         &dev_attr_size_mb.attr,
 855         &dev_attr_seconds_since_reset.attr,
 856         &dev_attr_ue_noinfo_count.attr,
 857         &dev_attr_ce_noinfo_count.attr,
 858         &dev_attr_ue_count.attr,
 859         &dev_attr_ce_count.attr,
 860         &dev_attr_max_location.attr,
 861         &dev_attr_sdram_scrub_rate.attr,
 862         NULL
 863 };
 864
 865 static umode_t mci_attr_is_visible(struct kobject *kobj,
 866                                    struct attribute *attr, int idx)
 867 {
 868         struct device *dev = kobj_to_dev(kobj);
 869         struct mem_ctl_info *mci = to_mci(dev);
 870         umode_t mode = 0;
 871
 872         if (attr != &dev_attr_sdram_scrub_rate.attr)
 873                 return attr->mode;
 874         if (mci->get_sdram_scrub_rate)
 875                 mode |= S_IRUGO;
 876         if (mci->set_sdram_scrub_rate)
 877                 mode |= S_IWUSR;
 878         return mode;
 879 }
 880
 881 static const struct attribute_group mci_attr_grp = {
 882         .attrs  = mci_attrs,
 883         .is_visible = mci_attr_is_visible,
 884 };
 885
 886 static const struct attribute_group *mci_attr_groups[] = {
 887         &mci_attr_grp,
 888         NULL
 889 };
 890
 891 static void mci_attr_release(struct device *dev)
 892 {
 893         struct mem_ctl_info *mci = container_of(dev, struct mem_ctl_info, dev);
 894
 895         edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev));
 896         kfree(mci);
 897 }
 898
 899 static const struct device_type mci_attr_type = {
 900         .groups         = mci_attr_groups,
 901         .release        = mci_attr_release,
 902 };
 903
 904 /*
 905  * Create a new Memory Controller kobject instance,
 906  *      mc<id> under the 'mc' directory
 907  *
 908  * Return:
 909  *      0       Success
 910  *      !0      Failure
 911  */
 912 int edac_create_sysfs_mci_device(struct mem_ctl_info *mci,
 913                                  const struct attribute_group **groups)
 914 {
 915         int i, err;
 916
 917         /* get the /sys/devices/system/edac subsys reference */
 918         mci->dev.type = &mci_attr_type;
 919         device_initialize(&mci->dev);
 920
 921         mci->dev.parent = mci_pdev;
 922         mci->dev.groups = groups;
 923         dev_set_name(&mci->dev, "mc%d", mci->mc_idx);
 924         dev_set_drvdata(&mci->dev, mci);
 925         pm_runtime_forbid(&mci->dev);
 926
 927         edac_dbg(0, "creating device %s\n", dev_name(&mci->dev));
 928         err = device_add(&mci->dev);
 929         if (err < 0) {
 930                 edac_dbg(1, "failure: create device %s\n", dev_name(&mci->dev));
 931                 goto out;
 932         }
 933
 934         /*
 935          * Create the dimm/rank devices
 936          */
 937         for (i = 0; i < mci->tot_dimms; i++) {
 938                 struct dimm_info *dimm = mci->dimms[i];
 939                 /* Only expose populated DIMMs */
 940                 if (!dimm->nr_pages)
 941                         continue;
 942
 943 #ifdef CONFIG_EDAC_DEBUG
 944                 edac_dbg(1, "creating dimm%d, located at ", i);
 945                 if (edac_debug_level >= 1) {
 946                         int lay;
 947                         for (lay = 0; lay < mci->n_layers; lay++)
 948                                 printk(KERN_CONT "%s %d ",
 949                                         edac_layer_name[mci->layers[lay].type],
 950                                         dimm->location[lay]);
 951                         printk(KERN_CONT "\n");
 952                 }
 953 #endif
 954                 err = edac_create_dimm_object(mci, dimm, i);
 955                 if (err) {
 956                         edac_dbg(1, "failure: create dimm %d obj\n", i);
 957                         goto fail_unregister_dimm;
 958                 }
 959         }
 960
 961 #ifdef CONFIG_EDAC_LEGACY_SYSFS
 962         err = edac_create_csrow_objects(mci);
 963         if (err < 0)
 964                 goto fail_unregister_dimm;
 965 #endif
 966
 967         edac_create_debugfs_nodes(mci);
 968         return 0;
 969
 970 fail_unregister_dimm:
 971         for (i--; i >= 0; i--) {
 972                 struct dimm_info *dimm = mci->dimms[i];
 973                 if (!dimm->nr_pages)
 974                         continue;
 975
 976                 device_unregister(&dimm->dev);
 977         }
 978         device_unregister(&mci->dev);
 979
 980 out:
 981         return err;
 982 }
 983
 984 /*
 985  * remove a Memory Controller instance
 986  */
 987 void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
 988 {
 989         int i;
 990
 991         edac_dbg(0, "\n");
 992
 993 #ifdef CONFIG_EDAC_DEBUG
 994         edac_debugfs_remove_recursive(mci->debugfs);
 995 #endif
 996 #ifdef CONFIG_EDAC_LEGACY_SYSFS
 997         edac_delete_csrow_objects(mci);
 998 #endif
 999
1000         for (i = 0; i < mci->tot_dimms; i++) {
1001                 struct dimm_info *dimm = mci->dimms[i];
1002                 if (dimm->nr_pages == 0)
1003                         continue;
1004                 edac_dbg(0, "removing device %s\n", dev_name(&dimm->dev));
1005                 device_unregister(&dimm->dev);
1006         }
1007 }
1008
1009 void edac_unregister_sysfs(struct mem_ctl_info *mci)
1010 {
1011         edac_dbg(1, "Unregistering device %s\n", dev_name(&mci->dev));
1012         device_unregister(&mci->dev);
1013 }
1014
1015 static void mc_attr_release(struct device *dev)
1016 {
1017         /*
1018          * There's no container structure here, as this is just the mci
1019          * parent device, used to create the /sys/devices/mc sysfs node.
1020          * So, there are no attributes on it.
1021          */
1022         edac_dbg(1, "Releasing device %s\n", dev_name(dev));
1023         kfree(dev);
1024 }
1025
1026 static const struct device_type mc_attr_type = {
1027         .release        = mc_attr_release,
1028 };
1029 /*
1030  * Init/exit code for the module. Basically, creates/removes /sys/class/rc
1031  */
1032 int __init edac_mc_sysfs_init(void)
1033 {
1034         int err;
1035
1036         mci_pdev = kzalloc(sizeof(*mci_pdev), GFP_KERNEL);
1037         if (!mci_pdev) {
1038                 err = -ENOMEM;
1039                 goto out;
1040         }
1041
1042         mci_pdev->bus = edac_get_sysfs_subsys();
1043         mci_pdev->type = &mc_attr_type;
1044         device_initialize(mci_pdev);
1045         dev_set_name(mci_pdev, "mc");
1046
1047         err = device_add(mci_pdev);
1048         if (err < 0)
1049                 goto out_put_device;
1050
1051         edac_dbg(0, "device %s created\n", dev_name(mci_pdev));
1052
1053         return 0;
1054
1055  out_put_device:
1056         put_device(mci_pdev);
1057  out:
1058         return err;
1059 }
1060
1061 void edac_mc_sysfs_exit(void)
1062 {
1063         device_unregister(mci_pdev);
1064 }