Douglas Thompson | e27e3da | 2007-07-19 01:49:36 -0700 | [diff] [blame^] | 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/module.h> |
| 13 | #include <linux/sysdev.h> |
| 14 | #include <linux/ctype.h> |
| 15 | |
| 16 | #include "edac_core.h" |
| 17 | #include "edac_module.h" |
| 18 | |
| 19 | |
| 20 | #define EDAC_DEVICE_SYMLINK "device" |
| 21 | |
| 22 | #define to_edacdev(k) container_of(k, struct edac_device_ctl_info, kobj) |
| 23 | #define to_edacdev_attr(a) container_of(a, struct edacdev_attribute, attr) |
| 24 | |
| 25 | #ifdef DKT |
| 26 | |
| 27 | static ssize_t edac_dev_ue_count_show(struct edac_device_ctl_info *edac_dev, |
| 28 | char *data) |
| 29 | { |
| 30 | return sprintf(data,"%d\n", edac_dev->ue_count); |
| 31 | } |
| 32 | |
| 33 | static ssize_t edac_dev_ce_count_show(struct edac_device_ctl_info *edac_dev, |
| 34 | char *data) |
| 35 | { |
| 36 | return sprintf(data,"%d\n", edac_dev->ce_count); |
| 37 | } |
| 38 | |
| 39 | static ssize_t edac_dev_seconds_show(struct edac_device_ctl_info *edac_dev, |
| 40 | char *data) |
| 41 | { |
| 42 | return sprintf(data,"%ld\n", (jiffies - edac_dev->start_time) / HZ); |
| 43 | } |
| 44 | |
| 45 | static ssize_t edac_dev_ctl_name_show(struct edac_device_ctl_info *edac_dev, |
| 46 | char *data) |
| 47 | { |
| 48 | return sprintf(data,"%s\n", edac_dev->ctl_name); |
| 49 | } |
| 50 | |
| 51 | |
| 52 | struct edacdev_attribute { |
| 53 | struct attribute attr; |
| 54 | ssize_t (*show)(struct edac_device_ctl_info *,char *); |
| 55 | ssize_t (*store)(struct edac_device_ctl_info *, const char *,size_t); |
| 56 | }; |
| 57 | |
| 58 | |
| 59 | /* EDAC DEVICE show/store functions for top most object */ |
| 60 | static ssize_t edacdev_show(struct kobject *kobj, struct attribute *attr, |
| 61 | char *buffer) |
| 62 | { |
| 63 | struct edac_device_ctl_info *edac_dev = to_edacdev(kobj); |
| 64 | struct edacdev_attribute * edacdev_attr = to_edacdev_attr(attr); |
| 65 | |
| 66 | if (edacdev_attr->show) |
| 67 | return edacdev_attr->show(edac_dev, buffer); |
| 68 | |
| 69 | return -EIO; |
| 70 | } |
| 71 | |
| 72 | static ssize_t edacdev_store(struct kobject *kobj, struct attribute *attr, |
| 73 | const char *buffer, size_t count) |
| 74 | { |
| 75 | struct edac_device_ctl_info *edac_dev = to_edacdev(kobj); |
| 76 | struct edacdev_attribute * edacdev_attr = to_edacdev_attr(attr); |
| 77 | |
| 78 | if (edacdev_attr->store) |
| 79 | return edacdev_attr->store(edac_dev, buffer, count); |
| 80 | |
| 81 | return -EIO; |
| 82 | } |
| 83 | |
| 84 | static struct sysfs_ops edac_dev_ops = { |
| 85 | .show = edacdev_show, |
| 86 | .store = edacdev_store |
| 87 | }; |
| 88 | |
| 89 | #define EDACDEV_ATTR(_name,_mode,_show,_store) \ |
| 90 | static struct edacdev_attribute edac_dev_attr_##_name = { \ |
| 91 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 92 | .show = _show, \ |
| 93 | .store = _store, \ |
| 94 | }; |
| 95 | |
| 96 | /* default Control file */ |
| 97 | EDACDEV_ATTR(reset_counters,S_IWUSR,NULL,edac_dev_reset_counters_store); |
| 98 | |
| 99 | /* default Attribute files */ |
| 100 | EDACDEV_ATTR(mc_name,S_IRUGO,edac_dev_ctl_name_show,NULL); |
| 101 | EDACDEV_ATTR(seconds_since_reset,S_IRUGO,edac_dev_seconds_show,NULL); |
| 102 | EDACDEV_ATTR(ue_count,S_IRUGO,edac_dev_ue_count_show,NULL); |
| 103 | EDACDEV_ATTR(ce_count,S_IRUGO,edac_dev_ce_count_show,NULL); |
| 104 | |
| 105 | |
| 106 | static struct edacdev_attribute *edacdev_attr[] = { |
| 107 | &edacdev_attr_reset_counters, |
| 108 | &edacdev_attr_mc_name, |
| 109 | &edacdev_attr_seconds_since_reset, |
| 110 | &edacdev_attr_ue_count, |
| 111 | &edacdev_attr_ce_count, |
| 112 | NULL |
| 113 | }; |
| 114 | |
| 115 | /* |
| 116 | * Release of a Edac Device controlling instance |
| 117 | */ |
| 118 | static void edac_dev_instance_release(struct kobject *kobj) |
| 119 | { |
| 120 | struct edac_device_ctl_info *edac_dev; |
| 121 | |
| 122 | edac_dev = to_edacdev(kobj); |
| 123 | debugf0("%s() idx=%d\n", __func__, edac_dev->dev_idx); |
| 124 | complete(&edac_dev->kobj_complete); |
| 125 | } |
| 126 | |
| 127 | static struct kobj_type ktype_device = { |
| 128 | .release = edac_dev_instance_release, |
| 129 | .sysfs_ops = &edacdev_ops, |
| 130 | .default_attrs = (struct attribute **) edacdev_attr, |
| 131 | }; |
| 132 | |
| 133 | #endif |
| 134 | |
| 135 | /************************** edac_device sysfs code and data **************/ |
| 136 | |
| 137 | /* |
| 138 | * Set of edac_device_ctl_info attribute store/show functions |
| 139 | */ |
| 140 | |
| 141 | /* 'log_ue' */ |
| 142 | static ssize_t edac_device_ctl_log_ue_show( |
| 143 | struct edac_device_ctl_info *ctl_info, char *data) |
| 144 | { |
| 145 | return sprintf(data,"%u\n", ctl_info->log_ue); |
| 146 | } |
| 147 | |
| 148 | static ssize_t edac_device_ctl_log_ue_store( |
| 149 | struct edac_device_ctl_info *ctl_info, |
| 150 | const char *data,size_t count) |
| 151 | { |
| 152 | /* if parameter is zero, turn off flag, if non-zero turn on flag */ |
| 153 | ctl_info->log_ue = (simple_strtoul(data,NULL,0) != 0); |
| 154 | |
| 155 | return count; |
| 156 | } |
| 157 | |
| 158 | /* 'log_ce' */ |
| 159 | static ssize_t edac_device_ctl_log_ce_show( |
| 160 | struct edac_device_ctl_info *ctl_info,char *data) |
| 161 | { |
| 162 | return sprintf(data,"%u\n", ctl_info->log_ce); |
| 163 | } |
| 164 | |
| 165 | static ssize_t edac_device_ctl_log_ce_store( |
| 166 | struct edac_device_ctl_info *ctl_info, |
| 167 | const char *data,size_t count) |
| 168 | { |
| 169 | /* if parameter is zero, turn off flag, if non-zero turn on flag */ |
| 170 | ctl_info->log_ce = (simple_strtoul(data,NULL,0) != 0); |
| 171 | |
| 172 | return count; |
| 173 | } |
| 174 | |
| 175 | |
| 176 | /* 'panic_on_ue' */ |
| 177 | static ssize_t edac_device_ctl_panic_on_ue_show( |
| 178 | struct edac_device_ctl_info *ctl_info, char *data) |
| 179 | { |
| 180 | return sprintf(data,"%u\n", ctl_info->panic_on_ue); |
| 181 | } |
| 182 | |
| 183 | static ssize_t edac_device_ctl_panic_on_ue_store( |
| 184 | struct edac_device_ctl_info *ctl_info, |
| 185 | const char *data,size_t count) |
| 186 | { |
| 187 | /* if parameter is zero, turn off flag, if non-zero turn on flag */ |
| 188 | ctl_info->panic_on_ue = (simple_strtoul(data,NULL,0) != 0); |
| 189 | |
| 190 | return count; |
| 191 | } |
| 192 | |
| 193 | /* 'poll_msec' show and store functions*/ |
| 194 | static ssize_t edac_device_ctl_poll_msec_show( |
| 195 | struct edac_device_ctl_info *ctl_info, char *data) |
| 196 | { |
| 197 | return sprintf(data,"%u\n", ctl_info->poll_msec); |
| 198 | } |
| 199 | |
| 200 | static ssize_t edac_device_ctl_poll_msec_store( |
| 201 | struct edac_device_ctl_info *ctl_info, |
| 202 | const char *data,size_t count) |
| 203 | { |
| 204 | unsigned long value; |
| 205 | |
| 206 | /* get the value and enforce that it is non-zero, must be at least |
| 207 | * one millisecond for the delay period, between scans |
| 208 | * Then cancel last outstanding delay for the work request |
| 209 | * and set a new one. |
| 210 | */ |
| 211 | value = simple_strtoul(data,NULL,0); |
| 212 | edac_device_reset_delay_period(ctl_info,value); |
| 213 | |
| 214 | return count; |
| 215 | } |
| 216 | |
| 217 | |
| 218 | /* edac_device_ctl_info specific attribute structure */ |
| 219 | struct ctl_info_attribute { |
| 220 | struct attribute attr; |
| 221 | ssize_t (*show)(struct edac_device_ctl_info *,char *); |
| 222 | ssize_t (*store)(struct edac_device_ctl_info *,const char *,size_t); |
| 223 | }; |
| 224 | |
| 225 | #define to_ctl_info(k) container_of(k, struct edac_device_ctl_info, kobj) |
| 226 | #define to_ctl_info_attr(a) container_of(a,struct ctl_info_attribute,attr) |
| 227 | |
| 228 | /* Function to 'show' fields from the edac_dev 'ctl_info' structure */ |
| 229 | static ssize_t edac_dev_ctl_info_show(struct kobject *kobj, |
| 230 | struct attribute *attr, |
| 231 | char *buffer) |
| 232 | { |
| 233 | struct edac_device_ctl_info *edac_dev = to_ctl_info(kobj); |
| 234 | struct ctl_info_attribute *ctl_info_attr = to_ctl_info_attr(attr); |
| 235 | |
| 236 | if (ctl_info_attr->show) |
| 237 | return ctl_info_attr->show(edac_dev,buffer); |
| 238 | return -EIO; |
| 239 | } |
| 240 | |
| 241 | /* Function to 'store' fields into the edac_dev 'ctl_info' structure */ |
| 242 | static ssize_t edac_dev_ctl_info_store(struct kobject *kobj, |
| 243 | struct attribute *attr, |
| 244 | const char *buffer, size_t count) |
| 245 | { |
| 246 | struct edac_device_ctl_info *edac_dev = to_ctl_info(kobj); |
| 247 | struct ctl_info_attribute *ctl_info_attr = to_ctl_info_attr(attr); |
| 248 | |
| 249 | if (ctl_info_attr->store) |
| 250 | return ctl_info_attr->store(edac_dev, buffer, count); |
| 251 | return -EIO; |
| 252 | } |
| 253 | |
| 254 | /* edac_dev file operations for an 'ctl_info' */ |
| 255 | static struct sysfs_ops device_ctl_info_ops = { |
| 256 | .show = edac_dev_ctl_info_show, |
| 257 | .store = edac_dev_ctl_info_store |
| 258 | }; |
| 259 | |
| 260 | #define CTL_INFO_ATTR(_name,_mode,_show,_store) \ |
| 261 | static struct ctl_info_attribute attr_ctl_info_##_name = { \ |
| 262 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 263 | .show = _show, \ |
| 264 | .store = _store, \ |
| 265 | }; |
| 266 | |
| 267 | |
| 268 | /* Declare the various ctl_info attributes here and their respective ops */ |
| 269 | CTL_INFO_ATTR(log_ue,S_IRUGO|S_IWUSR, |
| 270 | edac_device_ctl_log_ue_show, |
| 271 | edac_device_ctl_log_ue_store); |
| 272 | CTL_INFO_ATTR(log_ce,S_IRUGO|S_IWUSR, |
| 273 | edac_device_ctl_log_ce_show, |
| 274 | edac_device_ctl_log_ce_store); |
| 275 | CTL_INFO_ATTR(panic_on_ue,S_IRUGO|S_IWUSR, |
| 276 | edac_device_ctl_panic_on_ue_show, |
| 277 | edac_device_ctl_panic_on_ue_store); |
| 278 | CTL_INFO_ATTR(poll_msec,S_IRUGO|S_IWUSR, |
| 279 | edac_device_ctl_poll_msec_show, |
| 280 | edac_device_ctl_poll_msec_store); |
| 281 | |
| 282 | |
| 283 | /* Base Attributes of the EDAC_DEVICE ECC object */ |
| 284 | static struct ctl_info_attribute *device_ctrl_attr[] = { |
| 285 | &attr_ctl_info_panic_on_ue, |
| 286 | &attr_ctl_info_log_ue, |
| 287 | &attr_ctl_info_log_ce, |
| 288 | &attr_ctl_info_poll_msec, |
| 289 | NULL, |
| 290 | }; |
| 291 | |
| 292 | /* Main DEVICE kobject release() function */ |
| 293 | static void edac_device_ctrl_master_release(struct kobject *kobj) |
| 294 | { |
| 295 | struct edac_device_ctl_info *edac_dev; |
| 296 | |
| 297 | edac_dev = to_edacdev(kobj); |
| 298 | |
| 299 | debugf1("%s()\n", __func__); |
| 300 | complete(&edac_dev->kobj_complete); |
| 301 | } |
| 302 | |
| 303 | static struct kobj_type ktype_device_ctrl = { |
| 304 | .release = edac_device_ctrl_master_release, |
| 305 | .sysfs_ops = &device_ctl_info_ops, |
| 306 | .default_attrs = (struct attribute **) device_ctrl_attr, |
| 307 | }; |
| 308 | |
| 309 | |
| 310 | /**************** edac_device main kobj ctor/dtor code *********************/ |
| 311 | |
| 312 | /* |
| 313 | * edac_device_register_main_kobj |
| 314 | * |
| 315 | * perform the high level setup for the new edac_device instance |
| 316 | * |
| 317 | * Return: 0 SUCCESS |
| 318 | * !0 FAILURE |
| 319 | */ |
| 320 | static int edac_device_register_main_kobj( |
| 321 | struct edac_device_ctl_info *edac_dev) |
| 322 | { |
| 323 | int err = 0; |
| 324 | struct sysdev_class *edac_class; |
| 325 | |
| 326 | debugf1("%s()\n", __func__); |
| 327 | |
| 328 | /* get the /sys/devices/system/edac reference */ |
| 329 | edac_class = edac_get_edac_class(); |
| 330 | if (edac_class == NULL) { |
| 331 | debugf1("%s() no edac_class error=%d\n", __func__, err); |
| 332 | return err; |
| 333 | } |
| 334 | |
| 335 | /* Point to the 'edac_class' this instance 'reports' to */ |
| 336 | edac_dev->edac_class = edac_class; |
| 337 | |
| 338 | /* Init the devices's kobject */ |
| 339 | memset(&edac_dev->kobj, 0, sizeof (struct kobject)); |
| 340 | edac_dev->kobj.ktype = &ktype_device_ctrl; |
| 341 | |
| 342 | /* set this new device under the edac_class kobject */ |
| 343 | edac_dev->kobj.parent = &edac_class->kset.kobj; |
| 344 | |
| 345 | /* generate sysfs "..../edac/<name>" */ |
| 346 | debugf1("%s() set name of kobject to: %s\n", |
| 347 | __func__, edac_dev->name); |
| 348 | err = kobject_set_name(&edac_dev->kobj,"%s",edac_dev->name); |
| 349 | if (err) |
| 350 | return err; |
| 351 | err = kobject_register(&edac_dev->kobj); |
| 352 | if (err) { |
| 353 | debugf1("%s()Failed to register '.../edac/%s'\n", |
| 354 | __func__,edac_dev->name); |
| 355 | return err; |
| 356 | } |
| 357 | |
| 358 | debugf1("%s() Registered '.../edac/%s' kobject\n", |
| 359 | __func__, edac_dev->name); |
| 360 | |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | /* |
| 365 | * edac_device_unregister_main_kobj: |
| 366 | * the '..../edac/<name>' kobject |
| 367 | */ |
| 368 | static void edac_device_unregister_main_kobj( |
| 369 | struct edac_device_ctl_info *edac_dev) |
| 370 | { |
| 371 | debugf0("%s()\n", __func__); |
| 372 | debugf1("%s() name of kobject is: %s\n", |
| 373 | __func__, kobject_name(&edac_dev->kobj)); |
| 374 | |
| 375 | init_completion(&edac_dev->kobj_complete); |
| 376 | |
| 377 | /* |
| 378 | * Unregister the edac device's kobject and |
| 379 | * wait for reference count to reach 0. |
| 380 | */ |
| 381 | kobject_unregister(&edac_dev->kobj); |
| 382 | wait_for_completion(&edac_dev->kobj_complete); |
| 383 | } |
| 384 | |
| 385 | |
| 386 | /*************** edac_dev -> instance information ***********/ |
| 387 | |
| 388 | /* |
| 389 | * Set of low-level instance attribute show functions |
| 390 | */ |
| 391 | static ssize_t instance_ue_count_show( |
| 392 | struct edac_device_instance *instance, char *data) |
| 393 | { |
| 394 | return sprintf(data,"%u\n", instance->counters.ue_count); |
| 395 | } |
| 396 | |
| 397 | static ssize_t instance_ce_count_show( |
| 398 | struct edac_device_instance *instance, char *data) |
| 399 | { |
| 400 | return sprintf(data,"%u\n", instance->counters.ce_count); |
| 401 | } |
| 402 | |
| 403 | |
| 404 | |
| 405 | #define to_instance(k) container_of(k, struct edac_device_instance, kobj) |
| 406 | #define to_instance_attr(a) container_of(a,struct instance_attribute,attr) |
| 407 | |
| 408 | /* DEVICE instance kobject release() function */ |
| 409 | static void edac_device_ctrl_instance_release(struct kobject *kobj) |
| 410 | { |
| 411 | struct edac_device_instance *instance; |
| 412 | |
| 413 | debugf1("%s()\n", __func__); |
| 414 | |
| 415 | instance = to_instance(kobj); |
| 416 | complete(&instance->kobj_complete); |
| 417 | } |
| 418 | |
| 419 | |
| 420 | /* instance specific attribute structure */ |
| 421 | struct instance_attribute { |
| 422 | struct attribute attr; |
| 423 | ssize_t (*show)(struct edac_device_instance *,char *); |
| 424 | ssize_t (*store)(struct edac_device_instance *,const char *,size_t); |
| 425 | }; |
| 426 | |
| 427 | |
| 428 | /* Function to 'show' fields from the edac_dev 'instance' structure */ |
| 429 | static ssize_t edac_dev_instance_show(struct kobject *kobj, |
| 430 | struct attribute *attr, |
| 431 | char *buffer) |
| 432 | { |
| 433 | struct edac_device_instance *instance = to_instance(kobj); |
| 434 | struct instance_attribute *instance_attr = to_instance_attr(attr); |
| 435 | |
| 436 | if (instance_attr->show) |
| 437 | return instance_attr->show(instance,buffer); |
| 438 | return -EIO; |
| 439 | } |
| 440 | |
| 441 | |
| 442 | /* Function to 'store' fields into the edac_dev 'instance' structure */ |
| 443 | static ssize_t edac_dev_instance_store(struct kobject *kobj, |
| 444 | struct attribute *attr, |
| 445 | const char *buffer, size_t count) |
| 446 | { |
| 447 | struct edac_device_instance *instance = to_instance(kobj); |
| 448 | struct instance_attribute *instance_attr = to_instance_attr(attr); |
| 449 | |
| 450 | if (instance_attr->store) |
| 451 | return instance_attr->store(instance, buffer, count); |
| 452 | return -EIO; |
| 453 | } |
| 454 | |
| 455 | |
| 456 | |
| 457 | /* edac_dev file operations for an 'instance' */ |
| 458 | static struct sysfs_ops device_instance_ops = { |
| 459 | .show = edac_dev_instance_show, |
| 460 | .store = edac_dev_instance_store |
| 461 | }; |
| 462 | |
| 463 | #define INSTANCE_ATTR(_name,_mode,_show,_store) \ |
| 464 | static struct instance_attribute attr_instance_##_name = { \ |
| 465 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 466 | .show = _show, \ |
| 467 | .store = _store, \ |
| 468 | }; |
| 469 | |
| 470 | /* |
| 471 | * Define attributes visible for the edac_device instance object |
| 472 | * Each contains a pointer to a show and an optional set |
| 473 | * function pointer that does the low level output/input |
| 474 | */ |
| 475 | INSTANCE_ATTR(ce_count,S_IRUGO,instance_ce_count_show,NULL); |
| 476 | INSTANCE_ATTR(ue_count,S_IRUGO,instance_ue_count_show,NULL); |
| 477 | |
| 478 | /* list of edac_dev 'instance' attributes */ |
| 479 | static struct instance_attribute *device_instance_attr[] = { |
| 480 | &attr_instance_ce_count, |
| 481 | &attr_instance_ue_count, |
| 482 | NULL, |
| 483 | }; |
| 484 | |
| 485 | /* The 'ktype' for each edac_dev 'instance' */ |
| 486 | static struct kobj_type ktype_instance_ctrl = { |
| 487 | .release = edac_device_ctrl_instance_release, |
| 488 | .sysfs_ops = &device_instance_ops, |
| 489 | .default_attrs = (struct attribute **) device_instance_attr, |
| 490 | }; |
| 491 | |
| 492 | |
| 493 | /*************** edac_dev -> instance -> block information *********/ |
| 494 | |
| 495 | /* |
| 496 | * Set of low-level block attribute show functions |
| 497 | */ |
| 498 | static ssize_t block_ue_count_show( |
| 499 | struct edac_device_block *block, char *data) |
| 500 | { |
| 501 | return sprintf(data,"%u\n", block->counters.ue_count); |
| 502 | } |
| 503 | |
| 504 | static ssize_t block_ce_count_show( |
| 505 | struct edac_device_block *block, char *data) |
| 506 | { |
| 507 | return sprintf(data,"%u\n", block->counters.ce_count); |
| 508 | } |
| 509 | |
| 510 | |
| 511 | |
| 512 | #define to_block(k) container_of(k, struct edac_device_block, kobj) |
| 513 | #define to_block_attr(a) container_of(a,struct block_attribute,attr) |
| 514 | |
| 515 | /* DEVICE block kobject release() function */ |
| 516 | static void edac_device_ctrl_block_release(struct kobject *kobj) |
| 517 | { |
| 518 | struct edac_device_block *block; |
| 519 | |
| 520 | debugf1("%s()\n", __func__); |
| 521 | |
| 522 | block = to_block(kobj); |
| 523 | complete(&block->kobj_complete); |
| 524 | } |
| 525 | |
| 526 | /* block specific attribute structure */ |
| 527 | struct block_attribute { |
| 528 | struct attribute attr; |
| 529 | ssize_t (*show)(struct edac_device_block *,char *); |
| 530 | ssize_t (*store)(struct edac_device_block *,const char *,size_t); |
| 531 | }; |
| 532 | |
| 533 | /* Function to 'show' fields from the edac_dev 'block' structure */ |
| 534 | static ssize_t edac_dev_block_show(struct kobject *kobj, |
| 535 | struct attribute *attr, |
| 536 | char *buffer) |
| 537 | { |
| 538 | struct edac_device_block *block = to_block(kobj); |
| 539 | struct block_attribute *block_attr = to_block_attr(attr); |
| 540 | |
| 541 | if (block_attr->show) |
| 542 | return block_attr->show(block,buffer); |
| 543 | return -EIO; |
| 544 | } |
| 545 | |
| 546 | |
| 547 | /* Function to 'store' fields into the edac_dev 'block' structure */ |
| 548 | static ssize_t edac_dev_block_store(struct kobject *kobj, |
| 549 | struct attribute *attr, |
| 550 | const char *buffer, size_t count) |
| 551 | { |
| 552 | struct edac_device_block *block = to_block(kobj); |
| 553 | struct block_attribute *block_attr = to_block_attr(attr); |
| 554 | |
| 555 | if (block_attr->store) |
| 556 | return block_attr->store(block, buffer, count); |
| 557 | return -EIO; |
| 558 | } |
| 559 | |
| 560 | |
| 561 | /* edac_dev file operations for a 'block' */ |
| 562 | static struct sysfs_ops device_block_ops = { |
| 563 | .show = edac_dev_block_show, |
| 564 | .store = edac_dev_block_store |
| 565 | }; |
| 566 | |
| 567 | |
| 568 | #define BLOCK_ATTR(_name,_mode,_show,_store) \ |
| 569 | static struct block_attribute attr_block_##_name = { \ |
| 570 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 571 | .show = _show, \ |
| 572 | .store = _store, \ |
| 573 | }; |
| 574 | |
| 575 | BLOCK_ATTR(ce_count,S_IRUGO,block_ce_count_show,NULL); |
| 576 | BLOCK_ATTR(ue_count,S_IRUGO,block_ue_count_show,NULL); |
| 577 | |
| 578 | |
| 579 | /* list of edac_dev 'block' attributes */ |
| 580 | static struct block_attribute *device_block_attr[] = { |
| 581 | &attr_block_ce_count, |
| 582 | &attr_block_ue_count, |
| 583 | NULL, |
| 584 | }; |
| 585 | |
| 586 | /* The 'ktype' for each edac_dev 'block' */ |
| 587 | static struct kobj_type ktype_block_ctrl = { |
| 588 | .release = edac_device_ctrl_block_release, |
| 589 | .sysfs_ops = &device_block_ops, |
| 590 | .default_attrs = (struct attribute **) device_block_attr, |
| 591 | }; |
| 592 | |
| 593 | |
| 594 | /************** block ctor/dtor code ************/ |
| 595 | |
| 596 | /* |
| 597 | * edac_device_create_block |
| 598 | */ |
| 599 | static int edac_device_create_block( |
| 600 | struct edac_device_ctl_info *edac_dev, |
| 601 | struct edac_device_instance *instance, |
| 602 | int idx) |
| 603 | { |
| 604 | int err; |
| 605 | struct edac_device_block *block; |
| 606 | |
| 607 | block = &instance->blocks[idx]; |
| 608 | |
| 609 | debugf1("%s() Instance '%s' block[%d] '%s'\n", |
| 610 | __func__,instance->name, idx, block->name); |
| 611 | |
| 612 | /* init this block's kobject */ |
| 613 | memset(&block->kobj, 0, sizeof (struct kobject)); |
| 614 | block->kobj.parent = &instance->kobj; |
| 615 | block->kobj.ktype = &ktype_block_ctrl; |
| 616 | |
| 617 | err = kobject_set_name(&block->kobj,"%s",block->name); |
| 618 | if (err) |
| 619 | return err; |
| 620 | |
| 621 | err = kobject_register(&block->kobj); |
| 622 | if (err) { |
| 623 | debugf1("%s()Failed to register instance '%s'\n", |
| 624 | __func__,block->name); |
| 625 | return err; |
| 626 | } |
| 627 | |
| 628 | return 0; |
| 629 | } |
| 630 | |
| 631 | /* |
| 632 | * edac_device_delete_block(edac_dev,j); |
| 633 | */ |
| 634 | static void edac_device_delete_block( |
| 635 | struct edac_device_ctl_info *edac_dev, |
| 636 | struct edac_device_instance *instance, |
| 637 | int idx) |
| 638 | { |
| 639 | struct edac_device_block *block; |
| 640 | |
| 641 | block = &instance->blocks[idx]; |
| 642 | |
| 643 | /* unregister this block's kobject */ |
| 644 | init_completion(&block->kobj_complete); |
| 645 | kobject_unregister(&block->kobj); |
| 646 | wait_for_completion(&block->kobj_complete); |
| 647 | } |
| 648 | |
| 649 | /************** instance ctor/dtor code ************/ |
| 650 | |
| 651 | /* |
| 652 | * edac_device_create_instance |
| 653 | * create just one instance of an edac_device 'instance' |
| 654 | */ |
| 655 | static int edac_device_create_instance( |
| 656 | struct edac_device_ctl_info *edac_dev, int idx) |
| 657 | { |
| 658 | int i, j; |
| 659 | int err; |
| 660 | struct edac_device_instance *instance; |
| 661 | |
| 662 | instance = &edac_dev->instances[idx]; |
| 663 | |
| 664 | /* Init the instance's kobject */ |
| 665 | memset(&instance->kobj, 0, sizeof (struct kobject)); |
| 666 | |
| 667 | /* set this new device under the edac_device main kobject */ |
| 668 | instance->kobj.parent = &edac_dev->kobj; |
| 669 | instance->kobj.ktype = &ktype_instance_ctrl; |
| 670 | |
| 671 | err = kobject_set_name(&instance->kobj,"%s",instance->name); |
| 672 | if (err) |
| 673 | return err; |
| 674 | |
| 675 | err = kobject_register(&instance->kobj); |
| 676 | if (err != 0) { |
| 677 | debugf2("%s() Failed to register instance '%s'\n", |
| 678 | __func__,instance->name); |
| 679 | return err; |
| 680 | } |
| 681 | |
| 682 | debugf1("%s() now register '%d' blocks for instance %d\n", |
| 683 | __func__,instance->nr_blocks,idx); |
| 684 | |
| 685 | /* register all blocks of this instance */ |
| 686 | for (i = 0; i < instance->nr_blocks; i++ ) { |
| 687 | err = edac_device_create_block(edac_dev,instance,i); |
| 688 | if (err) { |
| 689 | for (j = 0; j < i; j++) { |
| 690 | edac_device_delete_block(edac_dev,instance,j); |
| 691 | } |
| 692 | return err; |
| 693 | } |
| 694 | } |
| 695 | |
| 696 | debugf1("%s() Registered instance %d '%s' kobject\n", |
| 697 | __func__, idx, instance->name); |
| 698 | |
| 699 | return 0; |
| 700 | } |
| 701 | |
| 702 | /* |
| 703 | * edac_device_remove_instance |
| 704 | * remove an edac_device instance |
| 705 | */ |
| 706 | static void edac_device_delete_instance( |
| 707 | struct edac_device_ctl_info *edac_dev, int idx) |
| 708 | { |
| 709 | int i; |
| 710 | struct edac_device_instance *instance; |
| 711 | |
| 712 | instance = &edac_dev->instances[idx]; |
| 713 | |
| 714 | /* unregister all blocks in this instance */ |
| 715 | for (i = 0; i < instance->nr_blocks; i++) { |
| 716 | edac_device_delete_block(edac_dev,instance,i); |
| 717 | } |
| 718 | |
| 719 | /* unregister this instance's kobject */ |
| 720 | init_completion(&instance->kobj_complete); |
| 721 | kobject_unregister(&instance->kobj); |
| 722 | wait_for_completion(&instance->kobj_complete); |
| 723 | } |
| 724 | |
| 725 | /* |
| 726 | * edac_device_create_instances |
| 727 | * create the first level of 'instances' for this device |
| 728 | * (ie 'cache' might have 'cache0', 'cache1', 'cache2', etc |
| 729 | */ |
| 730 | static int edac_device_create_instances(struct edac_device_ctl_info *edac_dev) |
| 731 | { |
| 732 | int i, j; |
| 733 | int err; |
| 734 | |
| 735 | debugf0("%s()\n", __func__); |
| 736 | |
| 737 | /* iterate over creation of the instances */ |
| 738 | for (i = 0; i < edac_dev->nr_instances; i++ ) { |
| 739 | err = edac_device_create_instance(edac_dev,i); |
| 740 | if (err) { |
| 741 | /* unwind previous instances on error */ |
| 742 | for (j = 0; j < i; j++) { |
| 743 | edac_device_delete_instance(edac_dev,j); |
| 744 | } |
| 745 | return err; |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | return 0; |
| 750 | } |
| 751 | |
| 752 | /* |
| 753 | * edac_device_delete_instances(edac_dev); |
| 754 | * unregister all the kobjects of the instances |
| 755 | */ |
| 756 | static void edac_device_delete_instances(struct edac_device_ctl_info *edac_dev) |
| 757 | { |
| 758 | int i; |
| 759 | |
| 760 | /* iterate over creation of the instances */ |
| 761 | for (i = 0; i < edac_dev->nr_instances; i++ ) { |
| 762 | edac_device_delete_instance(edac_dev,i); |
| 763 | } |
| 764 | } |
| 765 | |
| 766 | /******************* edac_dev sysfs ctor/dtor code *************/ |
| 767 | |
| 768 | /* |
| 769 | * edac_device_create_sysfs() Constructor |
| 770 | * |
| 771 | * Create a new edac_device kobject instance, |
| 772 | * |
| 773 | * Return: |
| 774 | * 0 Success |
| 775 | * !0 Failure |
| 776 | */ |
| 777 | int edac_device_create_sysfs(struct edac_device_ctl_info *edac_dev) |
| 778 | { |
| 779 | int err; |
| 780 | struct kobject *edac_kobj=&edac_dev->kobj; |
| 781 | |
| 782 | /* register this instance's main kobj with the edac class kobj */ |
| 783 | err = edac_device_register_main_kobj(edac_dev); |
| 784 | if (err) |
| 785 | return err; |
| 786 | |
| 787 | debugf0("%s() idx=%d\n", __func__, edac_dev->dev_idx); |
| 788 | |
| 789 | /* create a symlink from the edac device |
| 790 | * to the platform 'device' being used for this |
| 791 | */ |
| 792 | err = sysfs_create_link(edac_kobj, |
| 793 | &edac_dev->dev->kobj, |
| 794 | EDAC_DEVICE_SYMLINK); |
| 795 | if (err) { |
| 796 | debugf0("%s() sysfs_create_link() returned err= %d\n", |
| 797 | __func__, err); |
| 798 | return err; |
| 799 | } |
| 800 | |
| 801 | debugf0("%s() calling create-instances, idx=%d\n", |
| 802 | __func__, edac_dev->dev_idx); |
| 803 | |
| 804 | /* Create the first level instance directories */ |
| 805 | err = edac_device_create_instances(edac_dev); |
| 806 | if (err) { |
| 807 | goto error0; |
| 808 | } |
| 809 | |
| 810 | return 0; |
| 811 | |
| 812 | /* Error unwind stack */ |
| 813 | |
| 814 | error0: |
| 815 | edac_device_unregister_main_kobj(edac_dev); |
| 816 | |
| 817 | return err; |
| 818 | } |
| 819 | |
| 820 | /* |
| 821 | * edac_device_remove_sysfs() destructor |
| 822 | * |
| 823 | * remove a edac_device instance |
| 824 | */ |
| 825 | void edac_device_remove_sysfs(struct edac_device_ctl_info *edac_dev) |
| 826 | { |
| 827 | debugf0("%s()\n", __func__); |
| 828 | |
| 829 | edac_device_delete_instances(edac_dev); |
| 830 | |
| 831 | /* remove the sym link */ |
| 832 | sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK); |
| 833 | |
| 834 | /* unregister the instance's main kobj */ |
| 835 | edac_device_unregister_main_kobj(edac_dev); |
| 836 | } |
| 837 | |