| 1 | /* |
| 2 | * file for managing the edac_device class of devices for EDAC |
| 3 | * |
| 4 | * (C) 2007 SoftwareBitMaker(http://www.softwarebitmaker.com) |
| 5 | * This file may be distributed under the terms of the |
| 6 | * GNU General Public License. |
| 7 | * |
| 8 | * Written Doug Thompson <norsk5@xmission.com> |
| 9 | * |
| 10 | */ |
| 11 | |
| 12 | #include <linux/ctype.h> |
| 13 | |
| 14 | #include "edac_core.h" |
| 15 | #include "edac_module.h" |
| 16 | |
| 17 | #define EDAC_DEVICE_SYMLINK "device" |
| 18 | |
| 19 | #define to_edacdev(k) container_of(k, struct edac_device_ctl_info, kobj) |
| 20 | #define to_edacdev_attr(a) container_of(a, struct edacdev_attribute, attr) |
| 21 | |
| 22 | /************************** edac_device sysfs code and data **************/ |
| 23 | |
| 24 | /* |
| 25 | * Set of edac_device_ctl_info attribute store/show functions |
| 26 | */ |
| 27 | |
| 28 | /* 'log_ue' */ |
| 29 | static ssize_t edac_device_ctl_log_ue_show(struct edac_device_ctl_info |
| 30 | *ctl_info, char *data) |
| 31 | { |
| 32 | return sprintf(data, "%u\n", ctl_info->log_ue); |
| 33 | } |
| 34 | |
| 35 | static ssize_t edac_device_ctl_log_ue_store(struct edac_device_ctl_info |
| 36 | *ctl_info, const char *data, |
| 37 | size_t count) |
| 38 | { |
| 39 | /* if parameter is zero, turn off flag, if non-zero turn on flag */ |
| 40 | ctl_info->log_ue = (simple_strtoul(data, NULL, 0) != 0); |
| 41 | |
| 42 | return count; |
| 43 | } |
| 44 | |
| 45 | /* 'log_ce' */ |
| 46 | static ssize_t edac_device_ctl_log_ce_show(struct edac_device_ctl_info |
| 47 | *ctl_info, char *data) |
| 48 | { |
| 49 | return sprintf(data, "%u\n", ctl_info->log_ce); |
| 50 | } |
| 51 | |
| 52 | static ssize_t edac_device_ctl_log_ce_store(struct edac_device_ctl_info |
| 53 | *ctl_info, const char *data, |
| 54 | size_t count) |
| 55 | { |
| 56 | /* if parameter is zero, turn off flag, if non-zero turn on flag */ |
| 57 | ctl_info->log_ce = (simple_strtoul(data, NULL, 0) != 0); |
| 58 | |
| 59 | return count; |
| 60 | } |
| 61 | |
| 62 | /* 'panic_on_ue' */ |
| 63 | static ssize_t edac_device_ctl_panic_on_ue_show(struct edac_device_ctl_info |
| 64 | *ctl_info, char *data) |
| 65 | { |
| 66 | return sprintf(data, "%u\n", ctl_info->panic_on_ue); |
| 67 | } |
| 68 | |
| 69 | static ssize_t edac_device_ctl_panic_on_ue_store(struct edac_device_ctl_info |
| 70 | *ctl_info, const char *data, |
| 71 | size_t count) |
| 72 | { |
| 73 | /* if parameter is zero, turn off flag, if non-zero turn on flag */ |
| 74 | ctl_info->panic_on_ue = (simple_strtoul(data, NULL, 0) != 0); |
| 75 | |
| 76 | return count; |
| 77 | } |
| 78 | |
| 79 | /* 'poll_msec' show and store functions*/ |
| 80 | static ssize_t edac_device_ctl_poll_msec_show(struct edac_device_ctl_info |
| 81 | *ctl_info, char *data) |
| 82 | { |
| 83 | return sprintf(data, "%u\n", ctl_info->poll_msec); |
| 84 | } |
| 85 | |
| 86 | static ssize_t edac_device_ctl_poll_msec_store(struct edac_device_ctl_info |
| 87 | *ctl_info, const char *data, |
| 88 | size_t count) |
| 89 | { |
| 90 | unsigned long value; |
| 91 | |
| 92 | /* get the value and enforce that it is non-zero, must be at least |
| 93 | * one millisecond for the delay period, between scans |
| 94 | * Then cancel last outstanding delay for the work request |
| 95 | * and set a new one. |
| 96 | */ |
| 97 | value = simple_strtoul(data, NULL, 0); |
| 98 | edac_device_reset_delay_period(ctl_info, value); |
| 99 | |
| 100 | return count; |
| 101 | } |
| 102 | |
| 103 | /* edac_device_ctl_info specific attribute structure */ |
| 104 | struct ctl_info_attribute { |
| 105 | struct attribute attr; |
| 106 | ssize_t(*show) (struct edac_device_ctl_info *, char *); |
| 107 | ssize_t(*store) (struct edac_device_ctl_info *, const char *, size_t); |
| 108 | }; |
| 109 | |
| 110 | #define to_ctl_info(k) container_of(k, struct edac_device_ctl_info, kobj) |
| 111 | #define to_ctl_info_attr(a) container_of(a,struct ctl_info_attribute,attr) |
| 112 | |
| 113 | /* Function to 'show' fields from the edac_dev 'ctl_info' structure */ |
| 114 | static ssize_t edac_dev_ctl_info_show(struct kobject *kobj, |
| 115 | struct attribute *attr, char *buffer) |
| 116 | { |
| 117 | struct edac_device_ctl_info *edac_dev = to_ctl_info(kobj); |
| 118 | struct ctl_info_attribute *ctl_info_attr = to_ctl_info_attr(attr); |
| 119 | |
| 120 | if (ctl_info_attr->show) |
| 121 | return ctl_info_attr->show(edac_dev, buffer); |
| 122 | return -EIO; |
| 123 | } |
| 124 | |
| 125 | /* Function to 'store' fields into the edac_dev 'ctl_info' structure */ |
| 126 | static ssize_t edac_dev_ctl_info_store(struct kobject *kobj, |
| 127 | struct attribute *attr, |
| 128 | const char *buffer, size_t count) |
| 129 | { |
| 130 | struct edac_device_ctl_info *edac_dev = to_ctl_info(kobj); |
| 131 | struct ctl_info_attribute *ctl_info_attr = to_ctl_info_attr(attr); |
| 132 | |
| 133 | if (ctl_info_attr->store) |
| 134 | return ctl_info_attr->store(edac_dev, buffer, count); |
| 135 | return -EIO; |
| 136 | } |
| 137 | |
| 138 | /* edac_dev file operations for an 'ctl_info' */ |
| 139 | static struct sysfs_ops device_ctl_info_ops = { |
| 140 | .show = edac_dev_ctl_info_show, |
| 141 | .store = edac_dev_ctl_info_store |
| 142 | }; |
| 143 | |
| 144 | #define CTL_INFO_ATTR(_name,_mode,_show,_store) \ |
| 145 | static struct ctl_info_attribute attr_ctl_info_##_name = { \ |
| 146 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 147 | .show = _show, \ |
| 148 | .store = _store, \ |
| 149 | }; |
| 150 | |
| 151 | /* Declare the various ctl_info attributes here and their respective ops */ |
| 152 | CTL_INFO_ATTR(log_ue, S_IRUGO | S_IWUSR, |
| 153 | edac_device_ctl_log_ue_show, edac_device_ctl_log_ue_store); |
| 154 | CTL_INFO_ATTR(log_ce, S_IRUGO | S_IWUSR, |
| 155 | edac_device_ctl_log_ce_show, edac_device_ctl_log_ce_store); |
| 156 | CTL_INFO_ATTR(panic_on_ue, S_IRUGO | S_IWUSR, |
| 157 | edac_device_ctl_panic_on_ue_show, |
| 158 | edac_device_ctl_panic_on_ue_store); |
| 159 | CTL_INFO_ATTR(poll_msec, S_IRUGO | S_IWUSR, |
| 160 | edac_device_ctl_poll_msec_show, edac_device_ctl_poll_msec_store); |
| 161 | |
| 162 | /* Base Attributes of the EDAC_DEVICE ECC object */ |
| 163 | static struct ctl_info_attribute *device_ctrl_attr[] = { |
| 164 | &attr_ctl_info_panic_on_ue, |
| 165 | &attr_ctl_info_log_ue, |
| 166 | &attr_ctl_info_log_ce, |
| 167 | &attr_ctl_info_poll_msec, |
| 168 | NULL, |
| 169 | }; |
| 170 | |
| 171 | /* Main DEVICE kobject release() function */ |
| 172 | static void edac_device_ctrl_master_release(struct kobject *kobj) |
| 173 | { |
| 174 | struct edac_device_ctl_info *edac_dev; |
| 175 | |
| 176 | edac_dev = to_edacdev(kobj); |
| 177 | |
| 178 | debugf1("%s()\n", __func__); |
| 179 | complete(&edac_dev->kobj_complete); |
| 180 | } |
| 181 | |
| 182 | static struct kobj_type ktype_device_ctrl = { |
| 183 | .release = edac_device_ctrl_master_release, |
| 184 | .sysfs_ops = &device_ctl_info_ops, |
| 185 | .default_attrs = (struct attribute **)device_ctrl_attr, |
| 186 | }; |
| 187 | |
| 188 | /**************** edac_device main kobj ctor/dtor code *********************/ |
| 189 | |
| 190 | /* |
| 191 | * edac_device_register_main_kobj |
| 192 | * |
| 193 | * perform the high level setup for the new edac_device instance |
| 194 | * |
| 195 | * Return: 0 SUCCESS |
| 196 | * !0 FAILURE |
| 197 | */ |
| 198 | static int edac_device_register_main_kobj(struct edac_device_ctl_info *edac_dev) |
| 199 | { |
| 200 | int err = 0; |
| 201 | struct sysdev_class *edac_class; |
| 202 | |
| 203 | debugf1("%s()\n", __func__); |
| 204 | |
| 205 | /* get the /sys/devices/system/edac reference */ |
| 206 | edac_class = edac_get_edac_class(); |
| 207 | if (edac_class == NULL) { |
| 208 | debugf1("%s() no edac_class error=%d\n", __func__, err); |
| 209 | return err; |
| 210 | } |
| 211 | |
| 212 | /* Point to the 'edac_class' this instance 'reports' to */ |
| 213 | edac_dev->edac_class = edac_class; |
| 214 | |
| 215 | /* Init the devices's kobject */ |
| 216 | memset(&edac_dev->kobj, 0, sizeof(struct kobject)); |
| 217 | edac_dev->kobj.ktype = &ktype_device_ctrl; |
| 218 | |
| 219 | /* set this new device under the edac_class kobject */ |
| 220 | edac_dev->kobj.parent = &edac_class->kset.kobj; |
| 221 | |
| 222 | /* generate sysfs "..../edac/<name>" */ |
| 223 | debugf1("%s() set name of kobject to: %s\n", __func__, edac_dev->name); |
| 224 | err = kobject_set_name(&edac_dev->kobj, "%s", edac_dev->name); |
| 225 | if (err) |
| 226 | return err; |
| 227 | err = kobject_register(&edac_dev->kobj); |
| 228 | if (err) { |
| 229 | debugf1("%s()Failed to register '.../edac/%s'\n", |
| 230 | __func__, edac_dev->name); |
| 231 | return err; |
| 232 | } |
| 233 | |
| 234 | debugf1("%s() Registered '.../edac/%s' kobject\n", |
| 235 | __func__, edac_dev->name); |
| 236 | |
| 237 | return 0; |
| 238 | } |
| 239 | |
| 240 | /* |
| 241 | * edac_device_unregister_main_kobj: |
| 242 | * the '..../edac/<name>' kobject |
| 243 | */ |
| 244 | static void edac_device_unregister_main_kobj(struct edac_device_ctl_info |
| 245 | *edac_dev) |
| 246 | { |
| 247 | debugf0("%s()\n", __func__); |
| 248 | debugf1("%s() name of kobject is: %s\n", |
| 249 | __func__, kobject_name(&edac_dev->kobj)); |
| 250 | |
| 251 | init_completion(&edac_dev->kobj_complete); |
| 252 | |
| 253 | /* |
| 254 | * Unregister the edac device's kobject and |
| 255 | * wait for reference count to reach 0. |
| 256 | */ |
| 257 | kobject_unregister(&edac_dev->kobj); |
| 258 | wait_for_completion(&edac_dev->kobj_complete); |
| 259 | } |
| 260 | |
| 261 | /*************** edac_dev -> instance information ***********/ |
| 262 | |
| 263 | /* |
| 264 | * Set of low-level instance attribute show functions |
| 265 | */ |
| 266 | static ssize_t instance_ue_count_show(struct edac_device_instance *instance, |
| 267 | char *data) |
| 268 | { |
| 269 | return sprintf(data, "%u\n", instance->counters.ue_count); |
| 270 | } |
| 271 | |
| 272 | static ssize_t instance_ce_count_show(struct edac_device_instance *instance, |
| 273 | char *data) |
| 274 | { |
| 275 | return sprintf(data, "%u\n", instance->counters.ce_count); |
| 276 | } |
| 277 | |
| 278 | #define to_instance(k) container_of(k, struct edac_device_instance, kobj) |
| 279 | #define to_instance_attr(a) container_of(a,struct instance_attribute,attr) |
| 280 | |
| 281 | /* DEVICE instance kobject release() function */ |
| 282 | static void edac_device_ctrl_instance_release(struct kobject *kobj) |
| 283 | { |
| 284 | struct edac_device_instance *instance; |
| 285 | |
| 286 | debugf1("%s()\n", __func__); |
| 287 | |
| 288 | instance = to_instance(kobj); |
| 289 | complete(&instance->kobj_complete); |
| 290 | } |
| 291 | |
| 292 | /* instance specific attribute structure */ |
| 293 | struct instance_attribute { |
| 294 | struct attribute attr; |
| 295 | ssize_t(*show) (struct edac_device_instance *, char *); |
| 296 | ssize_t(*store) (struct edac_device_instance *, const char *, size_t); |
| 297 | }; |
| 298 | |
| 299 | /* Function to 'show' fields from the edac_dev 'instance' structure */ |
| 300 | static ssize_t edac_dev_instance_show(struct kobject *kobj, |
| 301 | struct attribute *attr, char *buffer) |
| 302 | { |
| 303 | struct edac_device_instance *instance = to_instance(kobj); |
| 304 | struct instance_attribute *instance_attr = to_instance_attr(attr); |
| 305 | |
| 306 | if (instance_attr->show) |
| 307 | return instance_attr->show(instance, buffer); |
| 308 | return -EIO; |
| 309 | } |
| 310 | |
| 311 | /* Function to 'store' fields into the edac_dev 'instance' structure */ |
| 312 | static ssize_t edac_dev_instance_store(struct kobject *kobj, |
| 313 | struct attribute *attr, |
| 314 | const char *buffer, size_t count) |
| 315 | { |
| 316 | struct edac_device_instance *instance = to_instance(kobj); |
| 317 | struct instance_attribute *instance_attr = to_instance_attr(attr); |
| 318 | |
| 319 | if (instance_attr->store) |
| 320 | return instance_attr->store(instance, buffer, count); |
| 321 | return -EIO; |
| 322 | } |
| 323 | |
| 324 | /* edac_dev file operations for an 'instance' */ |
| 325 | static struct sysfs_ops device_instance_ops = { |
| 326 | .show = edac_dev_instance_show, |
| 327 | .store = edac_dev_instance_store |
| 328 | }; |
| 329 | |
| 330 | #define INSTANCE_ATTR(_name,_mode,_show,_store) \ |
| 331 | static struct instance_attribute attr_instance_##_name = { \ |
| 332 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 333 | .show = _show, \ |
| 334 | .store = _store, \ |
| 335 | }; |
| 336 | |
| 337 | /* |
| 338 | * Define attributes visible for the edac_device instance object |
| 339 | * Each contains a pointer to a show and an optional set |
| 340 | * function pointer that does the low level output/input |
| 341 | */ |
| 342 | INSTANCE_ATTR(ce_count, S_IRUGO, instance_ce_count_show, NULL); |
| 343 | INSTANCE_ATTR(ue_count, S_IRUGO, instance_ue_count_show, NULL); |
| 344 | |
| 345 | /* list of edac_dev 'instance' attributes */ |
| 346 | static struct instance_attribute *device_instance_attr[] = { |
| 347 | &attr_instance_ce_count, |
| 348 | &attr_instance_ue_count, |
| 349 | NULL, |
| 350 | }; |
| 351 | |
| 352 | /* The 'ktype' for each edac_dev 'instance' */ |
| 353 | static struct kobj_type ktype_instance_ctrl = { |
| 354 | .release = edac_device_ctrl_instance_release, |
| 355 | .sysfs_ops = &device_instance_ops, |
| 356 | .default_attrs = (struct attribute **)device_instance_attr, |
| 357 | }; |
| 358 | |
| 359 | /*************** edac_dev -> instance -> block information *********/ |
| 360 | |
| 361 | /* |
| 362 | * Set of low-level block attribute show functions |
| 363 | */ |
| 364 | static ssize_t block_ue_count_show(struct edac_device_block *block, char *data) |
| 365 | { |
| 366 | return sprintf(data, "%u\n", block->counters.ue_count); |
| 367 | } |
| 368 | |
| 369 | static ssize_t block_ce_count_show(struct edac_device_block *block, char *data) |
| 370 | { |
| 371 | return sprintf(data, "%u\n", block->counters.ce_count); |
| 372 | } |
| 373 | |
| 374 | #define to_block(k) container_of(k, struct edac_device_block, kobj) |
| 375 | #define to_block_attr(a) container_of(a,struct block_attribute,attr) |
| 376 | |
| 377 | /* DEVICE block kobject release() function */ |
| 378 | static void edac_device_ctrl_block_release(struct kobject *kobj) |
| 379 | { |
| 380 | struct edac_device_block *block; |
| 381 | |
| 382 | debugf1("%s()\n", __func__); |
| 383 | |
| 384 | block = to_block(kobj); |
| 385 | complete(&block->kobj_complete); |
| 386 | } |
| 387 | |
| 388 | /* block specific attribute structure */ |
| 389 | struct block_attribute { |
| 390 | struct attribute attr; |
| 391 | ssize_t(*show) (struct edac_device_block *, char *); |
| 392 | ssize_t(*store) (struct edac_device_block *, const char *, size_t); |
| 393 | }; |
| 394 | |
| 395 | /* Function to 'show' fields from the edac_dev 'block' structure */ |
| 396 | static ssize_t edac_dev_block_show(struct kobject *kobj, |
| 397 | struct attribute *attr, char *buffer) |
| 398 | { |
| 399 | struct edac_device_block *block = to_block(kobj); |
| 400 | struct block_attribute *block_attr = to_block_attr(attr); |
| 401 | |
| 402 | if (block_attr->show) |
| 403 | return block_attr->show(block, buffer); |
| 404 | return -EIO; |
| 405 | } |
| 406 | |
| 407 | /* Function to 'store' fields into the edac_dev 'block' structure */ |
| 408 | static ssize_t edac_dev_block_store(struct kobject *kobj, |
| 409 | struct attribute *attr, |
| 410 | const char *buffer, size_t count) |
| 411 | { |
| 412 | struct edac_device_block *block = to_block(kobj); |
| 413 | struct block_attribute *block_attr = to_block_attr(attr); |
| 414 | |
| 415 | if (block_attr->store) |
| 416 | return block_attr->store(block, buffer, count); |
| 417 | return -EIO; |
| 418 | } |
| 419 | |
| 420 | /* edac_dev file operations for a 'block' */ |
| 421 | static struct sysfs_ops device_block_ops = { |
| 422 | .show = edac_dev_block_show, |
| 423 | .store = edac_dev_block_store |
| 424 | }; |
| 425 | |
| 426 | #define BLOCK_ATTR(_name,_mode,_show,_store) \ |
| 427 | static struct block_attribute attr_block_##_name = { \ |
| 428 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 429 | .show = _show, \ |
| 430 | .store = _store, \ |
| 431 | }; |
| 432 | |
| 433 | BLOCK_ATTR(ce_count, S_IRUGO, block_ce_count_show, NULL); |
| 434 | BLOCK_ATTR(ue_count, S_IRUGO, block_ue_count_show, NULL); |
| 435 | |
| 436 | /* list of edac_dev 'block' attributes */ |
| 437 | static struct block_attribute *device_block_attr[] = { |
| 438 | &attr_block_ce_count, |
| 439 | &attr_block_ue_count, |
| 440 | NULL, |
| 441 | }; |
| 442 | |
| 443 | /* The 'ktype' for each edac_dev 'block' */ |
| 444 | static struct kobj_type ktype_block_ctrl = { |
| 445 | .release = edac_device_ctrl_block_release, |
| 446 | .sysfs_ops = &device_block_ops, |
| 447 | .default_attrs = (struct attribute **)device_block_attr, |
| 448 | }; |
| 449 | |
| 450 | /************** block ctor/dtor code ************/ |
| 451 | |
| 452 | /* |
| 453 | * edac_device_create_block |
| 454 | */ |
| 455 | static int edac_device_create_block(struct edac_device_ctl_info *edac_dev, |
| 456 | struct edac_device_instance *instance, |
| 457 | int idx) |
| 458 | { |
| 459 | int err; |
| 460 | struct edac_device_block *block; |
| 461 | |
| 462 | block = &instance->blocks[idx]; |
| 463 | |
| 464 | debugf1("%s() Instance '%s' block[%d] '%s'\n", |
| 465 | __func__, instance->name, idx, block->name); |
| 466 | |
| 467 | /* init this block's kobject */ |
| 468 | memset(&block->kobj, 0, sizeof(struct kobject)); |
| 469 | block->kobj.parent = &instance->kobj; |
| 470 | block->kobj.ktype = &ktype_block_ctrl; |
| 471 | |
| 472 | err = kobject_set_name(&block->kobj, "%s", block->name); |
| 473 | if (err) |
| 474 | return err; |
| 475 | |
| 476 | err = kobject_register(&block->kobj); |
| 477 | if (err) { |
| 478 | debugf1("%s()Failed to register instance '%s'\n", |
| 479 | __func__, block->name); |
| 480 | return err; |
| 481 | } |
| 482 | |
| 483 | return 0; |
| 484 | } |
| 485 | |
| 486 | /* |
| 487 | * edac_device_delete_block(edac_dev,j); |
| 488 | */ |
| 489 | static void edac_device_delete_block(struct edac_device_ctl_info *edac_dev, |
| 490 | struct edac_device_instance *instance, |
| 491 | int idx) |
| 492 | { |
| 493 | struct edac_device_block *block; |
| 494 | |
| 495 | block = &instance->blocks[idx]; |
| 496 | |
| 497 | /* unregister this block's kobject */ |
| 498 | init_completion(&block->kobj_complete); |
| 499 | kobject_unregister(&block->kobj); |
| 500 | wait_for_completion(&block->kobj_complete); |
| 501 | } |
| 502 | |
| 503 | /************** instance ctor/dtor code ************/ |
| 504 | |
| 505 | /* |
| 506 | * edac_device_create_instance |
| 507 | * create just one instance of an edac_device 'instance' |
| 508 | */ |
| 509 | static int edac_device_create_instance(struct edac_device_ctl_info *edac_dev, |
| 510 | int idx) |
| 511 | { |
| 512 | int i, j; |
| 513 | int err; |
| 514 | struct edac_device_instance *instance; |
| 515 | |
| 516 | instance = &edac_dev->instances[idx]; |
| 517 | |
| 518 | /* Init the instance's kobject */ |
| 519 | memset(&instance->kobj, 0, sizeof(struct kobject)); |
| 520 | |
| 521 | /* set this new device under the edac_device main kobject */ |
| 522 | instance->kobj.parent = &edac_dev->kobj; |
| 523 | instance->kobj.ktype = &ktype_instance_ctrl; |
| 524 | |
| 525 | err = kobject_set_name(&instance->kobj, "%s", instance->name); |
| 526 | if (err) |
| 527 | return err; |
| 528 | |
| 529 | err = kobject_register(&instance->kobj); |
| 530 | if (err != 0) { |
| 531 | debugf2("%s() Failed to register instance '%s'\n", |
| 532 | __func__, instance->name); |
| 533 | return err; |
| 534 | } |
| 535 | |
| 536 | debugf1("%s() now register '%d' blocks for instance %d\n", |
| 537 | __func__, instance->nr_blocks, idx); |
| 538 | |
| 539 | /* register all blocks of this instance */ |
| 540 | for (i = 0; i < instance->nr_blocks; i++) { |
| 541 | err = edac_device_create_block(edac_dev, instance, i); |
| 542 | if (err) { |
| 543 | for (j = 0; j < i; j++) { |
| 544 | edac_device_delete_block(edac_dev, instance, j); |
| 545 | } |
| 546 | return err; |
| 547 | } |
| 548 | } |
| 549 | |
| 550 | debugf1("%s() Registered instance %d '%s' kobject\n", |
| 551 | __func__, idx, instance->name); |
| 552 | |
| 553 | return 0; |
| 554 | } |
| 555 | |
| 556 | /* |
| 557 | * edac_device_remove_instance |
| 558 | * remove an edac_device instance |
| 559 | */ |
| 560 | static void edac_device_delete_instance(struct edac_device_ctl_info *edac_dev, |
| 561 | int idx) |
| 562 | { |
| 563 | int i; |
| 564 | struct edac_device_instance *instance; |
| 565 | |
| 566 | instance = &edac_dev->instances[idx]; |
| 567 | |
| 568 | /* unregister all blocks in this instance */ |
| 569 | for (i = 0; i < instance->nr_blocks; i++) { |
| 570 | edac_device_delete_block(edac_dev, instance, i); |
| 571 | } |
| 572 | |
| 573 | /* unregister this instance's kobject */ |
| 574 | init_completion(&instance->kobj_complete); |
| 575 | kobject_unregister(&instance->kobj); |
| 576 | wait_for_completion(&instance->kobj_complete); |
| 577 | } |
| 578 | |
| 579 | /* |
| 580 | * edac_device_create_instances |
| 581 | * create the first level of 'instances' for this device |
| 582 | * (ie 'cache' might have 'cache0', 'cache1', 'cache2', etc |
| 583 | */ |
| 584 | static int edac_device_create_instances(struct edac_device_ctl_info *edac_dev) |
| 585 | { |
| 586 | int i, j; |
| 587 | int err; |
| 588 | |
| 589 | debugf0("%s()\n", __func__); |
| 590 | |
| 591 | /* iterate over creation of the instances */ |
| 592 | for (i = 0; i < edac_dev->nr_instances; i++) { |
| 593 | err = edac_device_create_instance(edac_dev, i); |
| 594 | if (err) { |
| 595 | /* unwind previous instances on error */ |
| 596 | for (j = 0; j < i; j++) { |
| 597 | edac_device_delete_instance(edac_dev, j); |
| 598 | } |
| 599 | return err; |
| 600 | } |
| 601 | } |
| 602 | |
| 603 | return 0; |
| 604 | } |
| 605 | |
| 606 | /* |
| 607 | * edac_device_delete_instances(edac_dev); |
| 608 | * unregister all the kobjects of the instances |
| 609 | */ |
| 610 | static void edac_device_delete_instances(struct edac_device_ctl_info *edac_dev) |
| 611 | { |
| 612 | int i; |
| 613 | |
| 614 | /* iterate over creation of the instances */ |
| 615 | for (i = 0; i < edac_dev->nr_instances; i++) { |
| 616 | edac_device_delete_instance(edac_dev, i); |
| 617 | } |
| 618 | } |
| 619 | |
| 620 | /******************* edac_dev sysfs ctor/dtor code *************/ |
| 621 | |
| 622 | /* |
| 623 | * edac_device_add_sysfs_attributes |
| 624 | * add some attributes to this instance's main kobject |
| 625 | */ |
| 626 | static int edac_device_add_sysfs_attributes( |
| 627 | struct edac_device_ctl_info *edac_dev) |
| 628 | { |
| 629 | int err; |
| 630 | struct edac_dev_sysfs_attribute *sysfs_attrib; |
| 631 | |
| 632 | /* point to the start of the array and iterate over it |
| 633 | * adding each attribute listed to this mci instance's kobject |
| 634 | */ |
| 635 | sysfs_attrib = edac_dev->sysfs_attributes; |
| 636 | |
| 637 | while (sysfs_attrib->attr.name != NULL) { |
| 638 | err = sysfs_create_file(&edac_dev->kobj, |
| 639 | (struct attribute*) sysfs_attrib); |
| 640 | if (err) { |
| 641 | return err; |
| 642 | } |
| 643 | |
| 644 | sysfs_attrib++; |
| 645 | } |
| 646 | |
| 647 | return 0; |
| 648 | } |
| 649 | |
| 650 | /* |
| 651 | * edac_device_create_sysfs() Constructor |
| 652 | * |
| 653 | * Create a new edac_device kobject instance, |
| 654 | * |
| 655 | * Return: |
| 656 | * 0 Success |
| 657 | * !0 Failure |
| 658 | */ |
| 659 | int edac_device_create_sysfs(struct edac_device_ctl_info *edac_dev) |
| 660 | { |
| 661 | int err; |
| 662 | struct kobject *edac_kobj = &edac_dev->kobj; |
| 663 | |
| 664 | /* register this instance's main kobj with the edac class kobj */ |
| 665 | err = edac_device_register_main_kobj(edac_dev); |
| 666 | if (err) |
| 667 | return err; |
| 668 | |
| 669 | debugf0("%s() idx=%d\n", __func__, edac_dev->dev_idx); |
| 670 | |
| 671 | /* If the low level driver requests some sysfs entries |
| 672 | * then go create them here |
| 673 | */ |
| 674 | if (edac_dev->sysfs_attributes != NULL) { |
| 675 | err = edac_device_add_sysfs_attributes(edac_dev); |
| 676 | if (err) { |
| 677 | debugf0("%s() failed to add sysfs attribs\n", |
| 678 | __func__); |
| 679 | goto err_unreg_object; |
| 680 | } |
| 681 | } |
| 682 | |
| 683 | /* create a symlink from the edac device |
| 684 | * to the platform 'device' being used for this |
| 685 | */ |
| 686 | err = sysfs_create_link(edac_kobj, |
| 687 | &edac_dev->dev->kobj, EDAC_DEVICE_SYMLINK); |
| 688 | if (err) { |
| 689 | debugf0("%s() sysfs_create_link() returned err= %d\n", |
| 690 | __func__, err); |
| 691 | goto err_unreg_object; |
| 692 | } |
| 693 | |
| 694 | debugf0("%s() calling create-instances, idx=%d\n", |
| 695 | __func__, edac_dev->dev_idx); |
| 696 | |
| 697 | /* Create the first level instance directories */ |
| 698 | err = edac_device_create_instances(edac_dev); |
| 699 | if (err) { |
| 700 | goto err_remove_link; |
| 701 | } |
| 702 | |
| 703 | return 0; |
| 704 | |
| 705 | /* Error unwind stack */ |
| 706 | err_remove_link: |
| 707 | /* remove the sym link */ |
| 708 | sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK); |
| 709 | |
| 710 | err_unreg_object: |
| 711 | edac_device_unregister_main_kobj(edac_dev); |
| 712 | |
| 713 | return err; |
| 714 | } |
| 715 | |
| 716 | /* |
| 717 | * edac_device_remove_sysfs() destructor |
| 718 | * |
| 719 | * remove a edac_device instance |
| 720 | */ |
| 721 | void edac_device_remove_sysfs(struct edac_device_ctl_info *edac_dev) |
| 722 | { |
| 723 | debugf0("%s()\n", __func__); |
| 724 | |
| 725 | edac_device_delete_instances(edac_dev); |
| 726 | |
| 727 | /* remove the sym link */ |
| 728 | sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK); |
| 729 | |
| 730 | /* unregister the instance's main kobj */ |
| 731 | edac_device_unregister_main_kobj(edac_dev); |
| 732 | } |