Commit | Line | Data |
---|---|---|
e27e3dac | 1 | /* |
fe5ff8b8 | 2 | * file for managing the edac_device subsystem of devices for EDAC |
e27e3dac | 3 | * |
6d8ef247 | 4 | * (C) 2007 SoftwareBitMaker |
1c3631ff | 5 | * |
e27e3dac DT |
6 | * This file may be distributed under the terms of the |
7 | * GNU General Public License. | |
8 | * | |
9 | * Written Doug Thompson <norsk5@xmission.com> | |
10 | * | |
11 | */ | |
12 | ||
e27e3dac | 13 | #include <linux/ctype.h> |
1c3631ff | 14 | #include <linux/module.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
30e1f7a8 | 16 | #include <linux/edac.h> |
e27e3dac | 17 | |
6d8ef247 | 18 | #include "edac_device.h" |
e27e3dac DT |
19 | #include "edac_module.h" |
20 | ||
e27e3dac DT |
21 | #define EDAC_DEVICE_SYMLINK "device" |
22 | ||
23 | #define to_edacdev(k) container_of(k, struct edac_device_ctl_info, kobj) | |
24 | #define to_edacdev_attr(a) container_of(a, struct edacdev_attribute, attr) | |
25 | ||
e27e3dac DT |
26 | |
27 | /* | |
28 | * Set of edac_device_ctl_info attribute store/show functions | |
29 | */ | |
30 | ||
31 | /* 'log_ue' */ | |
079708b9 | 32 | static ssize_t edac_device_ctl_log_ue_show(struct edac_device_ctl_info |
052dfb45 | 33 | *ctl_info, char *data) |
e27e3dac | 34 | { |
079708b9 | 35 | return sprintf(data, "%u\n", ctl_info->log_ue); |
e27e3dac DT |
36 | } |
37 | ||
079708b9 | 38 | static ssize_t edac_device_ctl_log_ue_store(struct edac_device_ctl_info |
052dfb45 DT |
39 | *ctl_info, const char *data, |
40 | size_t count) | |
e27e3dac DT |
41 | { |
42 | /* if parameter is zero, turn off flag, if non-zero turn on flag */ | |
079708b9 | 43 | ctl_info->log_ue = (simple_strtoul(data, NULL, 0) != 0); |
e27e3dac | 44 | |
079708b9 | 45 | return count; |
e27e3dac DT |
46 | } |
47 | ||
48 | /* 'log_ce' */ | |
079708b9 | 49 | static ssize_t edac_device_ctl_log_ce_show(struct edac_device_ctl_info |
052dfb45 | 50 | *ctl_info, char *data) |
e27e3dac | 51 | { |
079708b9 | 52 | return sprintf(data, "%u\n", ctl_info->log_ce); |
e27e3dac DT |
53 | } |
54 | ||
079708b9 | 55 | static ssize_t edac_device_ctl_log_ce_store(struct edac_device_ctl_info |
052dfb45 DT |
56 | *ctl_info, const char *data, |
57 | size_t count) | |
e27e3dac DT |
58 | { |
59 | /* if parameter is zero, turn off flag, if non-zero turn on flag */ | |
079708b9 | 60 | ctl_info->log_ce = (simple_strtoul(data, NULL, 0) != 0); |
e27e3dac | 61 | |
079708b9 | 62 | return count; |
e27e3dac DT |
63 | } |
64 | ||
e27e3dac | 65 | /* 'panic_on_ue' */ |
079708b9 DT |
66 | static ssize_t edac_device_ctl_panic_on_ue_show(struct edac_device_ctl_info |
67 | *ctl_info, char *data) | |
e27e3dac | 68 | { |
079708b9 | 69 | return sprintf(data, "%u\n", ctl_info->panic_on_ue); |
e27e3dac DT |
70 | } |
71 | ||
079708b9 DT |
72 | static ssize_t edac_device_ctl_panic_on_ue_store(struct edac_device_ctl_info |
73 | *ctl_info, const char *data, | |
74 | size_t count) | |
e27e3dac DT |
75 | { |
76 | /* if parameter is zero, turn off flag, if non-zero turn on flag */ | |
079708b9 | 77 | ctl_info->panic_on_ue = (simple_strtoul(data, NULL, 0) != 0); |
e27e3dac DT |
78 | |
79 | return count; | |
80 | } | |
81 | ||
82 | /* 'poll_msec' show and store functions*/ | |
079708b9 | 83 | static ssize_t edac_device_ctl_poll_msec_show(struct edac_device_ctl_info |
052dfb45 | 84 | *ctl_info, char *data) |
e27e3dac | 85 | { |
079708b9 | 86 | return sprintf(data, "%u\n", ctl_info->poll_msec); |
e27e3dac DT |
87 | } |
88 | ||
079708b9 | 89 | static ssize_t edac_device_ctl_poll_msec_store(struct edac_device_ctl_info |
052dfb45 DT |
90 | *ctl_info, const char *data, |
91 | size_t count) | |
e27e3dac DT |
92 | { |
93 | unsigned long value; | |
94 | ||
95 | /* get the value and enforce that it is non-zero, must be at least | |
96 | * one millisecond for the delay period, between scans | |
97 | * Then cancel last outstanding delay for the work request | |
98 | * and set a new one. | |
99 | */ | |
079708b9 DT |
100 | value = simple_strtoul(data, NULL, 0); |
101 | edac_device_reset_delay_period(ctl_info, value); | |
e27e3dac | 102 | |
079708b9 | 103 | return count; |
e27e3dac DT |
104 | } |
105 | ||
e27e3dac DT |
106 | /* edac_device_ctl_info specific attribute structure */ |
107 | struct ctl_info_attribute { | |
079708b9 | 108 | struct attribute attr; |
1c3631ff DT |
109 | ssize_t(*show) (struct edac_device_ctl_info *, char *); |
110 | ssize_t(*store) (struct edac_device_ctl_info *, const char *, size_t); | |
e27e3dac DT |
111 | }; |
112 | ||
113 | #define to_ctl_info(k) container_of(k, struct edac_device_ctl_info, kobj) | |
114 | #define to_ctl_info_attr(a) container_of(a,struct ctl_info_attribute,attr) | |
115 | ||
116 | /* Function to 'show' fields from the edac_dev 'ctl_info' structure */ | |
117 | static ssize_t edac_dev_ctl_info_show(struct kobject *kobj, | |
052dfb45 | 118 | struct attribute *attr, char *buffer) |
e27e3dac | 119 | { |
079708b9 DT |
120 | struct edac_device_ctl_info *edac_dev = to_ctl_info(kobj); |
121 | struct ctl_info_attribute *ctl_info_attr = to_ctl_info_attr(attr); | |
e27e3dac | 122 | |
079708b9 DT |
123 | if (ctl_info_attr->show) |
124 | return ctl_info_attr->show(edac_dev, buffer); | |
125 | return -EIO; | |
e27e3dac DT |
126 | } |
127 | ||
128 | /* Function to 'store' fields into the edac_dev 'ctl_info' structure */ | |
129 | static ssize_t edac_dev_ctl_info_store(struct kobject *kobj, | |
052dfb45 DT |
130 | struct attribute *attr, |
131 | const char *buffer, size_t count) | |
e27e3dac | 132 | { |
079708b9 DT |
133 | struct edac_device_ctl_info *edac_dev = to_ctl_info(kobj); |
134 | struct ctl_info_attribute *ctl_info_attr = to_ctl_info_attr(attr); | |
e27e3dac | 135 | |
079708b9 DT |
136 | if (ctl_info_attr->store) |
137 | return ctl_info_attr->store(edac_dev, buffer, count); | |
138 | return -EIO; | |
e27e3dac DT |
139 | } |
140 | ||
141 | /* edac_dev file operations for an 'ctl_info' */ | |
52cf25d0 | 142 | static const struct sysfs_ops device_ctl_info_ops = { |
079708b9 DT |
143 | .show = edac_dev_ctl_info_show, |
144 | .store = edac_dev_ctl_info_store | |
e27e3dac DT |
145 | }; |
146 | ||
147 | #define CTL_INFO_ATTR(_name,_mode,_show,_store) \ | |
148 | static struct ctl_info_attribute attr_ctl_info_##_name = { \ | |
052dfb45 DT |
149 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
150 | .show = _show, \ | |
151 | .store = _store, \ | |
e27e3dac DT |
152 | }; |
153 | ||
e27e3dac | 154 | /* Declare the various ctl_info attributes here and their respective ops */ |
079708b9 | 155 | CTL_INFO_ATTR(log_ue, S_IRUGO | S_IWUSR, |
052dfb45 | 156 | edac_device_ctl_log_ue_show, edac_device_ctl_log_ue_store); |
079708b9 | 157 | CTL_INFO_ATTR(log_ce, S_IRUGO | S_IWUSR, |
052dfb45 | 158 | edac_device_ctl_log_ce_show, edac_device_ctl_log_ce_store); |
079708b9 | 159 | CTL_INFO_ATTR(panic_on_ue, S_IRUGO | S_IWUSR, |
052dfb45 DT |
160 | edac_device_ctl_panic_on_ue_show, |
161 | edac_device_ctl_panic_on_ue_store); | |
079708b9 | 162 | CTL_INFO_ATTR(poll_msec, S_IRUGO | S_IWUSR, |
052dfb45 | 163 | edac_device_ctl_poll_msec_show, edac_device_ctl_poll_msec_store); |
e27e3dac DT |
164 | |
165 | /* Base Attributes of the EDAC_DEVICE ECC object */ | |
166 | static struct ctl_info_attribute *device_ctrl_attr[] = { | |
167 | &attr_ctl_info_panic_on_ue, | |
168 | &attr_ctl_info_log_ue, | |
169 | &attr_ctl_info_log_ce, | |
170 | &attr_ctl_info_poll_msec, | |
171 | NULL, | |
172 | }; | |
173 | ||
1c3631ff DT |
174 | /* |
175 | * edac_device_ctrl_master_release | |
176 | * | |
177 | * called when the reference count for the 'main' kobj | |
178 | * for a edac_device control struct reaches zero | |
179 | * | |
180 | * Reference count model: | |
181 | * One 'main' kobject for each control structure allocated. | |
182 | * That main kobj is initially set to one AND | |
183 | * the reference count for the EDAC 'core' module is | |
184 | * bumped by one, thus added 'keep in memory' dependency. | |
185 | * | |
186 | * Each new internal kobj (in instances and blocks) then | |
187 | * bumps the 'main' kobject. | |
188 | * | |
189 | * When they are released their release functions decrement | |
190 | * the 'main' kobj. | |
191 | * | |
192 | * When the main kobj reaches zero (0) then THIS function | |
193 | * is called which then decrements the EDAC 'core' module. | |
194 | * When the module reference count reaches zero then the | |
195 | * module no longer has dependency on keeping the release | |
196 | * function code in memory and module can be unloaded. | |
197 | * | |
198 | * This will support several control objects as well, each | |
199 | * with its own 'main' kobj. | |
200 | */ | |
e27e3dac DT |
201 | static void edac_device_ctrl_master_release(struct kobject *kobj) |
202 | { | |
1c3631ff | 203 | struct edac_device_ctl_info *edac_dev = to_edacdev(kobj); |
e27e3dac | 204 | |
956b9ba1 | 205 | edac_dbg(4, "control index=%d\n", edac_dev->dev_idx); |
e27e3dac | 206 | |
1c3631ff DT |
207 | /* decrement the EDAC CORE module ref count */ |
208 | module_put(edac_dev->owner); | |
209 | ||
210 | /* free the control struct containing the 'main' kobj | |
211 | * passed in to this routine | |
212 | */ | |
213 | kfree(edac_dev); | |
e27e3dac DT |
214 | } |
215 | ||
1c3631ff | 216 | /* ktype for the main (master) kobject */ |
e27e3dac DT |
217 | static struct kobj_type ktype_device_ctrl = { |
218 | .release = edac_device_ctrl_master_release, | |
219 | .sysfs_ops = &device_ctl_info_ops, | |
079708b9 | 220 | .default_attrs = (struct attribute **)device_ctrl_attr, |
e27e3dac DT |
221 | }; |
222 | ||
e27e3dac | 223 | /* |
1c3631ff | 224 | * edac_device_register_sysfs_main_kobj |
e27e3dac DT |
225 | * |
226 | * perform the high level setup for the new edac_device instance | |
227 | * | |
228 | * Return: 0 SUCCESS | |
229 | * !0 FAILURE | |
230 | */ | |
1c3631ff | 231 | int edac_device_register_sysfs_main_kobj(struct edac_device_ctl_info *edac_dev) |
e27e3dac | 232 | { |
fe5ff8b8 | 233 | struct bus_type *edac_subsys; |
1c3631ff | 234 | int err; |
e27e3dac | 235 | |
956b9ba1 | 236 | edac_dbg(1, "\n"); |
e27e3dac | 237 | |
079708b9 | 238 | /* get the /sys/devices/system/edac reference */ |
fe5ff8b8 | 239 | edac_subsys = edac_get_sysfs_subsys(); |
e27e3dac | 240 | |
fe5ff8b8 KS |
241 | /* Point to the 'edac_subsys' this instance 'reports' to */ |
242 | edac_dev->edac_subsys = edac_subsys; | |
e27e3dac DT |
243 | |
244 | /* Init the devices's kobject */ | |
079708b9 | 245 | memset(&edac_dev->kobj, 0, sizeof(struct kobject)); |
1c3631ff DT |
246 | |
247 | /* Record which module 'owns' this control structure | |
248 | * and bump the ref count of the module | |
249 | */ | |
250 | edac_dev->owner = THIS_MODULE; | |
251 | ||
252 | if (!try_module_get(edac_dev->owner)) { | |
253 | err = -ENODEV; | |
733476cf | 254 | goto err_out; |
1c3631ff DT |
255 | } |
256 | ||
257 | /* register */ | |
b2ed215a | 258 | err = kobject_init_and_add(&edac_dev->kobj, &ktype_device_ctrl, |
fe5ff8b8 | 259 | &edac_subsys->dev_root->kobj, |
b2ed215a | 260 | "%s", edac_dev->name); |
e27e3dac | 261 | if (err) { |
956b9ba1 JP |
262 | edac_dbg(1, "Failed to register '.../edac/%s'\n", |
263 | edac_dev->name); | |
1c3631ff | 264 | goto err_kobj_reg; |
e27e3dac | 265 | } |
b2ed215a | 266 | kobject_uevent(&edac_dev->kobj, KOBJ_ADD); |
e27e3dac | 267 | |
1c3631ff DT |
268 | /* At this point, to 'free' the control struct, |
269 | * edac_device_unregister_sysfs_main_kobj() must be used | |
270 | */ | |
271 | ||
956b9ba1 | 272 | edac_dbg(4, "Registered '.../edac/%s' kobject\n", edac_dev->name); |
e27e3dac DT |
273 | |
274 | return 0; | |
1c3631ff DT |
275 | |
276 | /* Error exit stack */ | |
277 | err_kobj_reg: | |
17ed808a | 278 | kobject_put(&edac_dev->kobj); |
1c3631ff DT |
279 | module_put(edac_dev->owner); |
280 | ||
281 | err_out: | |
282 | return err; | |
e27e3dac DT |
283 | } |
284 | ||
285 | /* | |
1c3631ff | 286 | * edac_device_unregister_sysfs_main_kobj: |
e27e3dac DT |
287 | * the '..../edac/<name>' kobject |
288 | */ | |
30e1f7a8 | 289 | void edac_device_unregister_sysfs_main_kobj(struct edac_device_ctl_info *dev) |
e27e3dac | 290 | { |
956b9ba1 JP |
291 | edac_dbg(0, "\n"); |
292 | edac_dbg(4, "name of kobject is: %s\n", kobject_name(&dev->kobj)); | |
e27e3dac | 293 | |
e27e3dac DT |
294 | /* |
295 | * Unregister the edac device's kobject and | |
1c3631ff DT |
296 | * allow for reference count to reach 0 at which point |
297 | * the callback will be called to: | |
298 | * a) module_put() this module | |
299 | * b) 'kfree' the memory | |
e27e3dac | 300 | */ |
30e1f7a8 | 301 | kobject_put(&dev->kobj); |
e27e3dac DT |
302 | } |
303 | ||
1c3631ff | 304 | /* edac_dev -> instance information */ |
e27e3dac DT |
305 | |
306 | /* | |
307 | * Set of low-level instance attribute show functions | |
308 | */ | |
079708b9 | 309 | static ssize_t instance_ue_count_show(struct edac_device_instance *instance, |
052dfb45 | 310 | char *data) |
e27e3dac | 311 | { |
079708b9 | 312 | return sprintf(data, "%u\n", instance->counters.ue_count); |
e27e3dac DT |
313 | } |
314 | ||
079708b9 | 315 | static ssize_t instance_ce_count_show(struct edac_device_instance *instance, |
052dfb45 | 316 | char *data) |
e27e3dac | 317 | { |
079708b9 | 318 | return sprintf(data, "%u\n", instance->counters.ce_count); |
e27e3dac DT |
319 | } |
320 | ||
e27e3dac DT |
321 | #define to_instance(k) container_of(k, struct edac_device_instance, kobj) |
322 | #define to_instance_attr(a) container_of(a,struct instance_attribute,attr) | |
323 | ||
324 | /* DEVICE instance kobject release() function */ | |
325 | static void edac_device_ctrl_instance_release(struct kobject *kobj) | |
326 | { | |
327 | struct edac_device_instance *instance; | |
328 | ||
956b9ba1 | 329 | edac_dbg(1, "\n"); |
e27e3dac | 330 | |
1c3631ff DT |
331 | /* map from this kobj to the main control struct |
332 | * and then dec the main kobj count | |
333 | */ | |
e27e3dac | 334 | instance = to_instance(kobj); |
1c3631ff | 335 | kobject_put(&instance->ctl->kobj); |
e27e3dac DT |
336 | } |
337 | ||
e27e3dac DT |
338 | /* instance specific attribute structure */ |
339 | struct instance_attribute { | |
079708b9 | 340 | struct attribute attr; |
52490c8d DT |
341 | ssize_t(*show) (struct edac_device_instance *, char *); |
342 | ssize_t(*store) (struct edac_device_instance *, const char *, size_t); | |
e27e3dac DT |
343 | }; |
344 | ||
e27e3dac DT |
345 | /* Function to 'show' fields from the edac_dev 'instance' structure */ |
346 | static ssize_t edac_dev_instance_show(struct kobject *kobj, | |
052dfb45 | 347 | struct attribute *attr, char *buffer) |
e27e3dac | 348 | { |
079708b9 DT |
349 | struct edac_device_instance *instance = to_instance(kobj); |
350 | struct instance_attribute *instance_attr = to_instance_attr(attr); | |
e27e3dac | 351 | |
079708b9 DT |
352 | if (instance_attr->show) |
353 | return instance_attr->show(instance, buffer); | |
354 | return -EIO; | |
e27e3dac DT |
355 | } |
356 | ||
e27e3dac DT |
357 | /* Function to 'store' fields into the edac_dev 'instance' structure */ |
358 | static ssize_t edac_dev_instance_store(struct kobject *kobj, | |
052dfb45 DT |
359 | struct attribute *attr, |
360 | const char *buffer, size_t count) | |
e27e3dac | 361 | { |
079708b9 DT |
362 | struct edac_device_instance *instance = to_instance(kobj); |
363 | struct instance_attribute *instance_attr = to_instance_attr(attr); | |
e27e3dac | 364 | |
079708b9 DT |
365 | if (instance_attr->store) |
366 | return instance_attr->store(instance, buffer, count); | |
367 | return -EIO; | |
e27e3dac DT |
368 | } |
369 | ||
e27e3dac | 370 | /* edac_dev file operations for an 'instance' */ |
52cf25d0 | 371 | static const struct sysfs_ops device_instance_ops = { |
079708b9 DT |
372 | .show = edac_dev_instance_show, |
373 | .store = edac_dev_instance_store | |
e27e3dac DT |
374 | }; |
375 | ||
376 | #define INSTANCE_ATTR(_name,_mode,_show,_store) \ | |
377 | static struct instance_attribute attr_instance_##_name = { \ | |
052dfb45 DT |
378 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
379 | .show = _show, \ | |
380 | .store = _store, \ | |
e27e3dac DT |
381 | }; |
382 | ||
383 | /* | |
384 | * Define attributes visible for the edac_device instance object | |
385 | * Each contains a pointer to a show and an optional set | |
386 | * function pointer that does the low level output/input | |
387 | */ | |
079708b9 DT |
388 | INSTANCE_ATTR(ce_count, S_IRUGO, instance_ce_count_show, NULL); |
389 | INSTANCE_ATTR(ue_count, S_IRUGO, instance_ue_count_show, NULL); | |
e27e3dac DT |
390 | |
391 | /* list of edac_dev 'instance' attributes */ | |
392 | static struct instance_attribute *device_instance_attr[] = { | |
393 | &attr_instance_ce_count, | |
394 | &attr_instance_ue_count, | |
395 | NULL, | |
396 | }; | |
397 | ||
398 | /* The 'ktype' for each edac_dev 'instance' */ | |
399 | static struct kobj_type ktype_instance_ctrl = { | |
400 | .release = edac_device_ctrl_instance_release, | |
401 | .sysfs_ops = &device_instance_ops, | |
079708b9 | 402 | .default_attrs = (struct attribute **)device_instance_attr, |
e27e3dac DT |
403 | }; |
404 | ||
1c3631ff | 405 | /* edac_dev -> instance -> block information */ |
e27e3dac | 406 | |
b2a4ac0c DT |
407 | #define to_block(k) container_of(k, struct edac_device_block, kobj) |
408 | #define to_block_attr(a) \ | |
409 | container_of(a, struct edac_dev_sysfs_block_attribute, attr) | |
410 | ||
e27e3dac DT |
411 | /* |
412 | * Set of low-level block attribute show functions | |
413 | */ | |
b2a4ac0c DT |
414 | static ssize_t block_ue_count_show(struct kobject *kobj, |
415 | struct attribute *attr, char *data) | |
e27e3dac | 416 | { |
b2a4ac0c DT |
417 | struct edac_device_block *block = to_block(kobj); |
418 | ||
079708b9 | 419 | return sprintf(data, "%u\n", block->counters.ue_count); |
e27e3dac DT |
420 | } |
421 | ||
b2a4ac0c DT |
422 | static ssize_t block_ce_count_show(struct kobject *kobj, |
423 | struct attribute *attr, char *data) | |
e27e3dac | 424 | { |
b2a4ac0c DT |
425 | struct edac_device_block *block = to_block(kobj); |
426 | ||
079708b9 | 427 | return sprintf(data, "%u\n", block->counters.ce_count); |
e27e3dac DT |
428 | } |
429 | ||
e27e3dac DT |
430 | /* DEVICE block kobject release() function */ |
431 | static void edac_device_ctrl_block_release(struct kobject *kobj) | |
432 | { | |
433 | struct edac_device_block *block; | |
434 | ||
956b9ba1 | 435 | edac_dbg(1, "\n"); |
e27e3dac | 436 | |
1c3631ff | 437 | /* get the container of the kobj */ |
e27e3dac | 438 | block = to_block(kobj); |
1c3631ff DT |
439 | |
440 | /* map from 'block kobj' to 'block->instance->controller->main_kobj' | |
441 | * now 'release' the block kobject | |
442 | */ | |
443 | kobject_put(&block->instance->ctl->kobj); | |
e27e3dac DT |
444 | } |
445 | ||
e27e3dac DT |
446 | |
447 | /* Function to 'show' fields from the edac_dev 'block' structure */ | |
448 | static ssize_t edac_dev_block_show(struct kobject *kobj, | |
052dfb45 | 449 | struct attribute *attr, char *buffer) |
e27e3dac | 450 | { |
b2a4ac0c DT |
451 | struct edac_dev_sysfs_block_attribute *block_attr = |
452 | to_block_attr(attr); | |
e27e3dac | 453 | |
079708b9 | 454 | if (block_attr->show) |
b2a4ac0c | 455 | return block_attr->show(kobj, attr, buffer); |
079708b9 | 456 | return -EIO; |
e27e3dac DT |
457 | } |
458 | ||
e27e3dac DT |
459 | /* Function to 'store' fields into the edac_dev 'block' structure */ |
460 | static ssize_t edac_dev_block_store(struct kobject *kobj, | |
052dfb45 DT |
461 | struct attribute *attr, |
462 | const char *buffer, size_t count) | |
e27e3dac | 463 | { |
b2a4ac0c DT |
464 | struct edac_dev_sysfs_block_attribute *block_attr; |
465 | ||
466 | block_attr = to_block_attr(attr); | |
e27e3dac | 467 | |
079708b9 | 468 | if (block_attr->store) |
b2a4ac0c | 469 | return block_attr->store(kobj, attr, buffer, count); |
079708b9 | 470 | return -EIO; |
e27e3dac DT |
471 | } |
472 | ||
e27e3dac | 473 | /* edac_dev file operations for a 'block' */ |
52cf25d0 | 474 | static const struct sysfs_ops device_block_ops = { |
079708b9 DT |
475 | .show = edac_dev_block_show, |
476 | .store = edac_dev_block_store | |
e27e3dac DT |
477 | }; |
478 | ||
e27e3dac | 479 | #define BLOCK_ATTR(_name,_mode,_show,_store) \ |
b2a4ac0c | 480 | static struct edac_dev_sysfs_block_attribute attr_block_##_name = { \ |
052dfb45 DT |
481 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
482 | .show = _show, \ | |
483 | .store = _store, \ | |
e27e3dac DT |
484 | }; |
485 | ||
079708b9 DT |
486 | BLOCK_ATTR(ce_count, S_IRUGO, block_ce_count_show, NULL); |
487 | BLOCK_ATTR(ue_count, S_IRUGO, block_ue_count_show, NULL); | |
e27e3dac DT |
488 | |
489 | /* list of edac_dev 'block' attributes */ | |
b2a4ac0c | 490 | static struct edac_dev_sysfs_block_attribute *device_block_attr[] = { |
e27e3dac DT |
491 | &attr_block_ce_count, |
492 | &attr_block_ue_count, | |
493 | NULL, | |
494 | }; | |
495 | ||
496 | /* The 'ktype' for each edac_dev 'block' */ | |
497 | static struct kobj_type ktype_block_ctrl = { | |
498 | .release = edac_device_ctrl_block_release, | |
499 | .sysfs_ops = &device_block_ops, | |
079708b9 | 500 | .default_attrs = (struct attribute **)device_block_attr, |
e27e3dac DT |
501 | }; |
502 | ||
1c3631ff | 503 | /* block ctor/dtor code */ |
e27e3dac DT |
504 | |
505 | /* | |
506 | * edac_device_create_block | |
507 | */ | |
079708b9 | 508 | static int edac_device_create_block(struct edac_device_ctl_info *edac_dev, |
052dfb45 | 509 | struct edac_device_instance *instance, |
1c3631ff | 510 | struct edac_device_block *block) |
e27e3dac | 511 | { |
fd309a9d | 512 | int i; |
e27e3dac | 513 | int err; |
fd309a9d | 514 | struct edac_dev_sysfs_block_attribute *sysfs_attrib; |
1c3631ff | 515 | struct kobject *main_kobj; |
e27e3dac | 516 | |
956b9ba1 JP |
517 | edac_dbg(4, "Instance '%s' inst_p=%p block '%s' block_p=%p\n", |
518 | instance->name, instance, block->name, block); | |
519 | edac_dbg(4, "block kobj=%p block kobj->parent=%p\n", | |
520 | &block->kobj, &block->kobj.parent); | |
e27e3dac DT |
521 | |
522 | /* init this block's kobject */ | |
079708b9 | 523 | memset(&block->kobj, 0, sizeof(struct kobject)); |
e27e3dac | 524 | |
1c3631ff | 525 | /* bump the main kobject's reference count for this controller |
25985edc | 526 | * and this instance is dependent on the main |
1c3631ff DT |
527 | */ |
528 | main_kobj = kobject_get(&edac_dev->kobj); | |
529 | if (!main_kobj) { | |
530 | err = -ENODEV; | |
531 | goto err_out; | |
532 | } | |
533 | ||
534 | /* Add this block's kobject */ | |
b2ed215a GKH |
535 | err = kobject_init_and_add(&block->kobj, &ktype_block_ctrl, |
536 | &instance->kobj, | |
537 | "%s", block->name); | |
e27e3dac | 538 | if (err) { |
956b9ba1 | 539 | edac_dbg(1, "Failed to register instance '%s'\n", block->name); |
1c3631ff DT |
540 | kobject_put(main_kobj); |
541 | err = -ENODEV; | |
542 | goto err_out; | |
e27e3dac DT |
543 | } |
544 | ||
fd309a9d DT |
545 | /* If there are driver level block attributes, then added them |
546 | * to the block kobject | |
547 | */ | |
548 | sysfs_attrib = block->block_attributes; | |
b2a4ac0c DT |
549 | if (sysfs_attrib && block->nr_attribs) { |
550 | for (i = 0; i < block->nr_attribs; i++, sysfs_attrib++) { | |
551 | ||
956b9ba1 JP |
552 | edac_dbg(4, "creating block attrib='%s' attrib->%p to kobj=%p\n", |
553 | sysfs_attrib->attr.name, | |
554 | sysfs_attrib, &block->kobj); | |
b2a4ac0c DT |
555 | |
556 | /* Create each block_attribute file */ | |
fd309a9d | 557 | err = sysfs_create_file(&block->kobj, |
b2a4ac0c | 558 | &sysfs_attrib->attr); |
fd309a9d DT |
559 | if (err) |
560 | goto err_on_attrib; | |
fd309a9d DT |
561 | } |
562 | } | |
b2ed215a | 563 | kobject_uevent(&block->kobj, KOBJ_ADD); |
fd309a9d | 564 | |
e27e3dac | 565 | return 0; |
fd309a9d | 566 | |
1c3631ff | 567 | /* Error unwind stack */ |
fd309a9d | 568 | err_on_attrib: |
c10997f6 | 569 | kobject_put(&block->kobj); |
fd309a9d | 570 | |
1c3631ff | 571 | err_out: |
fd309a9d | 572 | return err; |
e27e3dac DT |
573 | } |
574 | ||
575 | /* | |
1c3631ff | 576 | * edac_device_delete_block(edac_dev,block); |
e27e3dac | 577 | */ |
079708b9 | 578 | static void edac_device_delete_block(struct edac_device_ctl_info *edac_dev, |
1c3631ff | 579 | struct edac_device_block *block) |
e27e3dac | 580 | { |
1c3631ff DT |
581 | struct edac_dev_sysfs_block_attribute *sysfs_attrib; |
582 | int i; | |
e27e3dac | 583 | |
1c3631ff DT |
584 | /* if this block has 'attributes' then we need to iterate over the list |
585 | * and 'remove' the attributes on this block | |
586 | */ | |
587 | sysfs_attrib = block->block_attributes; | |
588 | if (sysfs_attrib && block->nr_attribs) { | |
b2a4ac0c DT |
589 | for (i = 0; i < block->nr_attribs; i++, sysfs_attrib++) { |
590 | ||
591 | /* remove each block_attrib file */ | |
1c3631ff DT |
592 | sysfs_remove_file(&block->kobj, |
593 | (struct attribute *) sysfs_attrib); | |
594 | } | |
595 | } | |
e27e3dac | 596 | |
1c3631ff DT |
597 | /* unregister this block's kobject, SEE: |
598 | * edac_device_ctrl_block_release() callback operation | |
599 | */ | |
c10997f6 | 600 | kobject_put(&block->kobj); |
e27e3dac DT |
601 | } |
602 | ||
1c3631ff | 603 | /* instance ctor/dtor code */ |
e27e3dac DT |
604 | |
605 | /* | |
606 | * edac_device_create_instance | |
607 | * create just one instance of an edac_device 'instance' | |
608 | */ | |
079708b9 | 609 | static int edac_device_create_instance(struct edac_device_ctl_info *edac_dev, |
052dfb45 | 610 | int idx) |
e27e3dac DT |
611 | { |
612 | int i, j; | |
613 | int err; | |
614 | struct edac_device_instance *instance; | |
1c3631ff | 615 | struct kobject *main_kobj; |
e27e3dac DT |
616 | |
617 | instance = &edac_dev->instances[idx]; | |
618 | ||
619 | /* Init the instance's kobject */ | |
079708b9 | 620 | memset(&instance->kobj, 0, sizeof(struct kobject)); |
e27e3dac | 621 | |
1c3631ff | 622 | instance->ctl = edac_dev; |
e27e3dac | 623 | |
1c3631ff | 624 | /* bump the main kobject's reference count for this controller |
25985edc | 625 | * and this instance is dependent on the main |
1c3631ff DT |
626 | */ |
627 | main_kobj = kobject_get(&edac_dev->kobj); | |
628 | if (!main_kobj) { | |
629 | err = -ENODEV; | |
630 | goto err_out; | |
631 | } | |
e27e3dac | 632 | |
b2ed215a GKH |
633 | /* Formally register this instance's kobject under the edac_device */ |
634 | err = kobject_init_and_add(&instance->kobj, &ktype_instance_ctrl, | |
635 | &edac_dev->kobj, "%s", instance->name); | |
e27e3dac | 636 | if (err != 0) { |
956b9ba1 JP |
637 | edac_dbg(2, "Failed to register instance '%s'\n", |
638 | instance->name); | |
1c3631ff DT |
639 | kobject_put(main_kobj); |
640 | goto err_out; | |
e27e3dac DT |
641 | } |
642 | ||
956b9ba1 JP |
643 | edac_dbg(4, "now register '%d' blocks for instance %d\n", |
644 | instance->nr_blocks, idx); | |
e27e3dac DT |
645 | |
646 | /* register all blocks of this instance */ | |
079708b9 | 647 | for (i = 0; i < instance->nr_blocks; i++) { |
1c3631ff DT |
648 | err = edac_device_create_block(edac_dev, instance, |
649 | &instance->blocks[i]); | |
e27e3dac | 650 | if (err) { |
1c3631ff | 651 | /* If any fail, remove all previous ones */ |
52490c8d | 652 | for (j = 0; j < i; j++) |
1c3631ff DT |
653 | edac_device_delete_block(edac_dev, |
654 | &instance->blocks[j]); | |
655 | goto err_release_instance_kobj; | |
e27e3dac DT |
656 | } |
657 | } | |
b2ed215a | 658 | kobject_uevent(&instance->kobj, KOBJ_ADD); |
e27e3dac | 659 | |
956b9ba1 JP |
660 | edac_dbg(4, "Registered instance %d '%s' kobject\n", |
661 | idx, instance->name); | |
e27e3dac DT |
662 | |
663 | return 0; | |
1c3631ff DT |
664 | |
665 | /* error unwind stack */ | |
666 | err_release_instance_kobj: | |
c10997f6 | 667 | kobject_put(&instance->kobj); |
1c3631ff DT |
668 | |
669 | err_out: | |
670 | return err; | |
e27e3dac DT |
671 | } |
672 | ||
673 | /* | |
674 | * edac_device_remove_instance | |
675 | * remove an edac_device instance | |
676 | */ | |
079708b9 DT |
677 | static void edac_device_delete_instance(struct edac_device_ctl_info *edac_dev, |
678 | int idx) | |
e27e3dac | 679 | { |
e27e3dac | 680 | struct edac_device_instance *instance; |
1c3631ff | 681 | int i; |
e27e3dac DT |
682 | |
683 | instance = &edac_dev->instances[idx]; | |
684 | ||
685 | /* unregister all blocks in this instance */ | |
52490c8d | 686 | for (i = 0; i < instance->nr_blocks; i++) |
1c3631ff | 687 | edac_device_delete_block(edac_dev, &instance->blocks[i]); |
e27e3dac | 688 | |
1c3631ff DT |
689 | /* unregister this instance's kobject, SEE: |
690 | * edac_device_ctrl_instance_release() for callback operation | |
691 | */ | |
c10997f6 | 692 | kobject_put(&instance->kobj); |
e27e3dac DT |
693 | } |
694 | ||
695 | /* | |
696 | * edac_device_create_instances | |
697 | * create the first level of 'instances' for this device | |
698 | * (ie 'cache' might have 'cache0', 'cache1', 'cache2', etc | |
699 | */ | |
700 | static int edac_device_create_instances(struct edac_device_ctl_info *edac_dev) | |
701 | { | |
702 | int i, j; | |
703 | int err; | |
704 | ||
956b9ba1 | 705 | edac_dbg(0, "\n"); |
e27e3dac DT |
706 | |
707 | /* iterate over creation of the instances */ | |
079708b9 DT |
708 | for (i = 0; i < edac_dev->nr_instances; i++) { |
709 | err = edac_device_create_instance(edac_dev, i); | |
e27e3dac DT |
710 | if (err) { |
711 | /* unwind previous instances on error */ | |
52490c8d | 712 | for (j = 0; j < i; j++) |
079708b9 | 713 | edac_device_delete_instance(edac_dev, j); |
e27e3dac DT |
714 | return err; |
715 | } | |
716 | } | |
717 | ||
718 | return 0; | |
719 | } | |
720 | ||
721 | /* | |
722 | * edac_device_delete_instances(edac_dev); | |
723 | * unregister all the kobjects of the instances | |
724 | */ | |
725 | static void edac_device_delete_instances(struct edac_device_ctl_info *edac_dev) | |
726 | { | |
727 | int i; | |
728 | ||
729 | /* iterate over creation of the instances */ | |
52490c8d | 730 | for (i = 0; i < edac_dev->nr_instances; i++) |
079708b9 | 731 | edac_device_delete_instance(edac_dev, i); |
e27e3dac DT |
732 | } |
733 | ||
1c3631ff | 734 | /* edac_dev sysfs ctor/dtor code */ |
e27e3dac | 735 | |
42a8e397 | 736 | /* |
1c3631ff | 737 | * edac_device_add_main_sysfs_attributes |
42a8e397 DT |
738 | * add some attributes to this instance's main kobject |
739 | */ | |
1c3631ff | 740 | static int edac_device_add_main_sysfs_attributes( |
42a8e397 DT |
741 | struct edac_device_ctl_info *edac_dev) |
742 | { | |
052dfb45 | 743 | struct edac_dev_sysfs_attribute *sysfs_attrib; |
1c3631ff | 744 | int err = 0; |
052dfb45 | 745 | |
052dfb45 | 746 | sysfs_attrib = edac_dev->sysfs_attributes; |
1c3631ff DT |
747 | if (sysfs_attrib) { |
748 | /* iterate over the array and create an attribute for each | |
749 | * entry in the list | |
750 | */ | |
751 | while (sysfs_attrib->attr.name != NULL) { | |
752 | err = sysfs_create_file(&edac_dev->kobj, | |
052dfb45 | 753 | (struct attribute*) sysfs_attrib); |
1c3631ff DT |
754 | if (err) |
755 | goto err_out; | |
052dfb45 | 756 | |
1c3631ff DT |
757 | sysfs_attrib++; |
758 | } | |
052dfb45 | 759 | } |
42a8e397 | 760 | |
1c3631ff DT |
761 | err_out: |
762 | return err; | |
763 | } | |
764 | ||
765 | /* | |
766 | * edac_device_remove_main_sysfs_attributes | |
767 | * remove any attributes to this instance's main kobject | |
768 | */ | |
769 | static void edac_device_remove_main_sysfs_attributes( | |
770 | struct edac_device_ctl_info *edac_dev) | |
771 | { | |
772 | struct edac_dev_sysfs_attribute *sysfs_attrib; | |
773 | ||
774 | /* if there are main attributes, defined, remove them. First, | |
775 | * point to the start of the array and iterate over it | |
776 | * removing each attribute listed from this device's instance's kobject | |
777 | */ | |
778 | sysfs_attrib = edac_dev->sysfs_attributes; | |
779 | if (sysfs_attrib) { | |
780 | while (sysfs_attrib->attr.name != NULL) { | |
781 | sysfs_remove_file(&edac_dev->kobj, | |
782 | (struct attribute *) sysfs_attrib); | |
783 | sysfs_attrib++; | |
784 | } | |
785 | } | |
42a8e397 DT |
786 | } |
787 | ||
e27e3dac DT |
788 | /* |
789 | * edac_device_create_sysfs() Constructor | |
790 | * | |
1c3631ff DT |
791 | * accept a created edac_device control structure |
792 | * and 'export' it to sysfs. The 'main' kobj should already have been | |
793 | * created. 'instance' and 'block' kobjects should be registered | |
794 | * along with any 'block' attributes from the low driver. In addition, | |
795 | * the main attributes (if any) are connected to the main kobject of | |
796 | * the control structure. | |
e27e3dac DT |
797 | * |
798 | * Return: | |
799 | * 0 Success | |
800 | * !0 Failure | |
801 | */ | |
802 | int edac_device_create_sysfs(struct edac_device_ctl_info *edac_dev) | |
803 | { | |
804 | int err; | |
079708b9 | 805 | struct kobject *edac_kobj = &edac_dev->kobj; |
e27e3dac | 806 | |
956b9ba1 | 807 | edac_dbg(0, "idx=%d\n", edac_dev->dev_idx); |
e27e3dac | 808 | |
1c3631ff DT |
809 | /* go create any main attributes callers wants */ |
810 | err = edac_device_add_main_sysfs_attributes(edac_dev); | |
811 | if (err) { | |
956b9ba1 | 812 | edac_dbg(0, "failed to add sysfs attribs\n"); |
1c3631ff | 813 | goto err_out; |
42a8e397 DT |
814 | } |
815 | ||
e27e3dac DT |
816 | /* create a symlink from the edac device |
817 | * to the platform 'device' being used for this | |
818 | */ | |
819 | err = sysfs_create_link(edac_kobj, | |
079708b9 | 820 | &edac_dev->dev->kobj, EDAC_DEVICE_SYMLINK); |
e27e3dac | 821 | if (err) { |
956b9ba1 | 822 | edac_dbg(0, "sysfs_create_link() returned err= %d\n", err); |
1c3631ff | 823 | goto err_remove_main_attribs; |
e27e3dac DT |
824 | } |
825 | ||
1c3631ff DT |
826 | /* Create the first level instance directories |
827 | * In turn, the nested blocks beneath the instances will | |
828 | * be registered as well | |
829 | */ | |
e27e3dac | 830 | err = edac_device_create_instances(edac_dev); |
1c3631ff | 831 | if (err) { |
956b9ba1 JP |
832 | edac_dbg(0, "edac_device_create_instances() returned err= %d\n", |
833 | err); | |
42a8e397 | 834 | goto err_remove_link; |
1c3631ff DT |
835 | } |
836 | ||
837 | ||
956b9ba1 | 838 | edac_dbg(4, "create-instances done, idx=%d\n", edac_dev->dev_idx); |
e27e3dac DT |
839 | |
840 | return 0; | |
841 | ||
842 | /* Error unwind stack */ | |
42a8e397 DT |
843 | err_remove_link: |
844 | /* remove the sym link */ | |
845 | sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK); | |
e27e3dac | 846 | |
1c3631ff DT |
847 | err_remove_main_attribs: |
848 | edac_device_remove_main_sysfs_attributes(edac_dev); | |
e27e3dac | 849 | |
1c3631ff | 850 | err_out: |
e27e3dac DT |
851 | return err; |
852 | } | |
853 | ||
854 | /* | |
855 | * edac_device_remove_sysfs() destructor | |
856 | * | |
1c3631ff | 857 | * given an edac_device struct, tear down the kobject resources |
e27e3dac DT |
858 | */ |
859 | void edac_device_remove_sysfs(struct edac_device_ctl_info *edac_dev) | |
860 | { | |
956b9ba1 | 861 | edac_dbg(0, "\n"); |
e27e3dac | 862 | |
1c3631ff DT |
863 | /* remove any main attributes for this device */ |
864 | edac_device_remove_main_sysfs_attributes(edac_dev); | |
e27e3dac | 865 | |
1c3631ff | 866 | /* remove the device sym link */ |
e27e3dac DT |
867 | sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK); |
868 | ||
1c3631ff DT |
869 | /* walk the instance/block kobject tree, deconstructing it */ |
870 | edac_device_delete_instances(edac_dev); | |
e27e3dac | 871 | } |