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 */ | |
625c6b55 | 166 | static struct attribute *device_ctrl_attrs[] = { |
11413893 GKH |
167 | &attr_ctl_info_panic_on_ue.attr, |
168 | &attr_ctl_info_log_ue.attr, | |
169 | &attr_ctl_info_log_ce.attr, | |
170 | &attr_ctl_info_poll_msec.attr, | |
e27e3dac DT |
171 | NULL, |
172 | }; | |
625c6b55 | 173 | ATTRIBUTE_GROUPS(device_ctrl); |
e27e3dac | 174 | |
1c3631ff DT |
175 | /* |
176 | * edac_device_ctrl_master_release | |
177 | * | |
178 | * called when the reference count for the 'main' kobj | |
179 | * for a edac_device control struct reaches zero | |
180 | * | |
181 | * Reference count model: | |
182 | * One 'main' kobject for each control structure allocated. | |
183 | * That main kobj is initially set to one AND | |
184 | * the reference count for the EDAC 'core' module is | |
185 | * bumped by one, thus added 'keep in memory' dependency. | |
186 | * | |
187 | * Each new internal kobj (in instances and blocks) then | |
188 | * bumps the 'main' kobject. | |
189 | * | |
190 | * When they are released their release functions decrement | |
191 | * the 'main' kobj. | |
192 | * | |
193 | * When the main kobj reaches zero (0) then THIS function | |
194 | * is called which then decrements the EDAC 'core' module. | |
195 | * When the module reference count reaches zero then the | |
196 | * module no longer has dependency on keeping the release | |
197 | * function code in memory and module can be unloaded. | |
198 | * | |
199 | * This will support several control objects as well, each | |
200 | * with its own 'main' kobj. | |
201 | */ | |
e27e3dac DT |
202 | static void edac_device_ctrl_master_release(struct kobject *kobj) |
203 | { | |
1c3631ff | 204 | struct edac_device_ctl_info *edac_dev = to_edacdev(kobj); |
e27e3dac | 205 | |
956b9ba1 | 206 | edac_dbg(4, "control index=%d\n", edac_dev->dev_idx); |
e27e3dac | 207 | |
1c3631ff DT |
208 | /* decrement the EDAC CORE module ref count */ |
209 | module_put(edac_dev->owner); | |
210 | ||
211 | /* free the control struct containing the 'main' kobj | |
212 | * passed in to this routine | |
213 | */ | |
214 | kfree(edac_dev); | |
e27e3dac DT |
215 | } |
216 | ||
1c3631ff | 217 | /* ktype for the main (master) kobject */ |
e27e3dac DT |
218 | static struct kobj_type ktype_device_ctrl = { |
219 | .release = edac_device_ctrl_master_release, | |
220 | .sysfs_ops = &device_ctl_info_ops, | |
625c6b55 | 221 | .default_groups = device_ctrl_groups, |
e27e3dac DT |
222 | }; |
223 | ||
e27e3dac | 224 | /* |
1c3631ff | 225 | * edac_device_register_sysfs_main_kobj |
e27e3dac DT |
226 | * |
227 | * perform the high level setup for the new edac_device instance | |
228 | * | |
229 | * Return: 0 SUCCESS | |
230 | * !0 FAILURE | |
231 | */ | |
1c3631ff | 232 | int edac_device_register_sysfs_main_kobj(struct edac_device_ctl_info *edac_dev) |
e27e3dac | 233 | { |
fe5ff8b8 | 234 | struct bus_type *edac_subsys; |
1c3631ff | 235 | int err; |
e27e3dac | 236 | |
956b9ba1 | 237 | edac_dbg(1, "\n"); |
e27e3dac | 238 | |
079708b9 | 239 | /* get the /sys/devices/system/edac reference */ |
fe5ff8b8 | 240 | edac_subsys = edac_get_sysfs_subsys(); |
e27e3dac | 241 | |
fe5ff8b8 KS |
242 | /* Point to the 'edac_subsys' this instance 'reports' to */ |
243 | edac_dev->edac_subsys = edac_subsys; | |
e27e3dac DT |
244 | |
245 | /* Init the devices's kobject */ | |
079708b9 | 246 | memset(&edac_dev->kobj, 0, sizeof(struct kobject)); |
1c3631ff DT |
247 | |
248 | /* Record which module 'owns' this control structure | |
249 | * and bump the ref count of the module | |
250 | */ | |
251 | edac_dev->owner = THIS_MODULE; | |
252 | ||
253 | if (!try_module_get(edac_dev->owner)) { | |
254 | err = -ENODEV; | |
733476cf | 255 | goto err_out; |
1c3631ff DT |
256 | } |
257 | ||
258 | /* register */ | |
b2ed215a | 259 | err = kobject_init_and_add(&edac_dev->kobj, &ktype_device_ctrl, |
fe5ff8b8 | 260 | &edac_subsys->dev_root->kobj, |
b2ed215a | 261 | "%s", edac_dev->name); |
e27e3dac | 262 | if (err) { |
956b9ba1 JP |
263 | edac_dbg(1, "Failed to register '.../edac/%s'\n", |
264 | edac_dev->name); | |
1c3631ff | 265 | goto err_kobj_reg; |
e27e3dac | 266 | } |
b2ed215a | 267 | kobject_uevent(&edac_dev->kobj, KOBJ_ADD); |
e27e3dac | 268 | |
1c3631ff DT |
269 | /* At this point, to 'free' the control struct, |
270 | * edac_device_unregister_sysfs_main_kobj() must be used | |
271 | */ | |
272 | ||
956b9ba1 | 273 | edac_dbg(4, "Registered '.../edac/%s' kobject\n", edac_dev->name); |
e27e3dac DT |
274 | |
275 | return 0; | |
1c3631ff DT |
276 | |
277 | /* Error exit stack */ | |
278 | err_kobj_reg: | |
17ed808a | 279 | kobject_put(&edac_dev->kobj); |
1c3631ff DT |
280 | module_put(edac_dev->owner); |
281 | ||
282 | err_out: | |
283 | return err; | |
e27e3dac DT |
284 | } |
285 | ||
286 | /* | |
1c3631ff | 287 | * edac_device_unregister_sysfs_main_kobj: |
e27e3dac DT |
288 | * the '..../edac/<name>' kobject |
289 | */ | |
30e1f7a8 | 290 | void edac_device_unregister_sysfs_main_kobj(struct edac_device_ctl_info *dev) |
e27e3dac | 291 | { |
956b9ba1 JP |
292 | edac_dbg(0, "\n"); |
293 | edac_dbg(4, "name of kobject is: %s\n", kobject_name(&dev->kobj)); | |
e27e3dac | 294 | |
e27e3dac DT |
295 | /* |
296 | * Unregister the edac device's kobject and | |
1c3631ff DT |
297 | * allow for reference count to reach 0 at which point |
298 | * the callback will be called to: | |
299 | * a) module_put() this module | |
300 | * b) 'kfree' the memory | |
e27e3dac | 301 | */ |
30e1f7a8 | 302 | kobject_put(&dev->kobj); |
e27e3dac DT |
303 | } |
304 | ||
1c3631ff | 305 | /* edac_dev -> instance information */ |
e27e3dac DT |
306 | |
307 | /* | |
308 | * Set of low-level instance attribute show functions | |
309 | */ | |
079708b9 | 310 | static ssize_t instance_ue_count_show(struct edac_device_instance *instance, |
052dfb45 | 311 | char *data) |
e27e3dac | 312 | { |
079708b9 | 313 | return sprintf(data, "%u\n", instance->counters.ue_count); |
e27e3dac DT |
314 | } |
315 | ||
079708b9 | 316 | static ssize_t instance_ce_count_show(struct edac_device_instance *instance, |
052dfb45 | 317 | char *data) |
e27e3dac | 318 | { |
079708b9 | 319 | return sprintf(data, "%u\n", instance->counters.ce_count); |
e27e3dac DT |
320 | } |
321 | ||
e27e3dac DT |
322 | #define to_instance(k) container_of(k, struct edac_device_instance, kobj) |
323 | #define to_instance_attr(a) container_of(a,struct instance_attribute,attr) | |
324 | ||
325 | /* DEVICE instance kobject release() function */ | |
326 | static void edac_device_ctrl_instance_release(struct kobject *kobj) | |
327 | { | |
328 | struct edac_device_instance *instance; | |
329 | ||
956b9ba1 | 330 | edac_dbg(1, "\n"); |
e27e3dac | 331 | |
1c3631ff DT |
332 | /* map from this kobj to the main control struct |
333 | * and then dec the main kobj count | |
334 | */ | |
e27e3dac | 335 | instance = to_instance(kobj); |
1c3631ff | 336 | kobject_put(&instance->ctl->kobj); |
e27e3dac DT |
337 | } |
338 | ||
e27e3dac DT |
339 | /* instance specific attribute structure */ |
340 | struct instance_attribute { | |
079708b9 | 341 | struct attribute attr; |
52490c8d DT |
342 | ssize_t(*show) (struct edac_device_instance *, char *); |
343 | ssize_t(*store) (struct edac_device_instance *, const char *, size_t); | |
e27e3dac DT |
344 | }; |
345 | ||
e27e3dac DT |
346 | /* Function to 'show' fields from the edac_dev 'instance' structure */ |
347 | static ssize_t edac_dev_instance_show(struct kobject *kobj, | |
052dfb45 | 348 | struct attribute *attr, char *buffer) |
e27e3dac | 349 | { |
079708b9 DT |
350 | struct edac_device_instance *instance = to_instance(kobj); |
351 | struct instance_attribute *instance_attr = to_instance_attr(attr); | |
e27e3dac | 352 | |
079708b9 DT |
353 | if (instance_attr->show) |
354 | return instance_attr->show(instance, buffer); | |
355 | return -EIO; | |
e27e3dac DT |
356 | } |
357 | ||
e27e3dac DT |
358 | /* Function to 'store' fields into the edac_dev 'instance' structure */ |
359 | static ssize_t edac_dev_instance_store(struct kobject *kobj, | |
052dfb45 DT |
360 | struct attribute *attr, |
361 | const char *buffer, size_t count) | |
e27e3dac | 362 | { |
079708b9 DT |
363 | struct edac_device_instance *instance = to_instance(kobj); |
364 | struct instance_attribute *instance_attr = to_instance_attr(attr); | |
e27e3dac | 365 | |
079708b9 DT |
366 | if (instance_attr->store) |
367 | return instance_attr->store(instance, buffer, count); | |
368 | return -EIO; | |
e27e3dac DT |
369 | } |
370 | ||
e27e3dac | 371 | /* edac_dev file operations for an 'instance' */ |
52cf25d0 | 372 | static const struct sysfs_ops device_instance_ops = { |
079708b9 DT |
373 | .show = edac_dev_instance_show, |
374 | .store = edac_dev_instance_store | |
e27e3dac DT |
375 | }; |
376 | ||
377 | #define INSTANCE_ATTR(_name,_mode,_show,_store) \ | |
378 | static struct instance_attribute attr_instance_##_name = { \ | |
052dfb45 DT |
379 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
380 | .show = _show, \ | |
381 | .store = _store, \ | |
e27e3dac DT |
382 | }; |
383 | ||
384 | /* | |
385 | * Define attributes visible for the edac_device instance object | |
386 | * Each contains a pointer to a show and an optional set | |
387 | * function pointer that does the low level output/input | |
388 | */ | |
079708b9 DT |
389 | INSTANCE_ATTR(ce_count, S_IRUGO, instance_ce_count_show, NULL); |
390 | INSTANCE_ATTR(ue_count, S_IRUGO, instance_ue_count_show, NULL); | |
e27e3dac DT |
391 | |
392 | /* list of edac_dev 'instance' attributes */ | |
625c6b55 | 393 | static struct attribute *device_instance_attrs[] = { |
11413893 GKH |
394 | &attr_instance_ce_count.attr, |
395 | &attr_instance_ue_count.attr, | |
e27e3dac DT |
396 | NULL, |
397 | }; | |
625c6b55 | 398 | ATTRIBUTE_GROUPS(device_instance); |
e27e3dac DT |
399 | |
400 | /* The 'ktype' for each edac_dev 'instance' */ | |
401 | static struct kobj_type ktype_instance_ctrl = { | |
402 | .release = edac_device_ctrl_instance_release, | |
403 | .sysfs_ops = &device_instance_ops, | |
625c6b55 | 404 | .default_groups = device_instance_groups, |
e27e3dac DT |
405 | }; |
406 | ||
1c3631ff | 407 | /* edac_dev -> instance -> block information */ |
e27e3dac | 408 | |
b2a4ac0c DT |
409 | #define to_block(k) container_of(k, struct edac_device_block, kobj) |
410 | #define to_block_attr(a) \ | |
411 | container_of(a, struct edac_dev_sysfs_block_attribute, attr) | |
412 | ||
e27e3dac DT |
413 | /* |
414 | * Set of low-level block attribute show functions | |
415 | */ | |
b2a4ac0c DT |
416 | static ssize_t block_ue_count_show(struct kobject *kobj, |
417 | struct attribute *attr, char *data) | |
e27e3dac | 418 | { |
b2a4ac0c DT |
419 | struct edac_device_block *block = to_block(kobj); |
420 | ||
079708b9 | 421 | return sprintf(data, "%u\n", block->counters.ue_count); |
e27e3dac DT |
422 | } |
423 | ||
b2a4ac0c DT |
424 | static ssize_t block_ce_count_show(struct kobject *kobj, |
425 | struct attribute *attr, char *data) | |
e27e3dac | 426 | { |
b2a4ac0c DT |
427 | struct edac_device_block *block = to_block(kobj); |
428 | ||
079708b9 | 429 | return sprintf(data, "%u\n", block->counters.ce_count); |
e27e3dac DT |
430 | } |
431 | ||
e27e3dac DT |
432 | /* DEVICE block kobject release() function */ |
433 | static void edac_device_ctrl_block_release(struct kobject *kobj) | |
434 | { | |
435 | struct edac_device_block *block; | |
436 | ||
956b9ba1 | 437 | edac_dbg(1, "\n"); |
e27e3dac | 438 | |
1c3631ff | 439 | /* get the container of the kobj */ |
e27e3dac | 440 | block = to_block(kobj); |
1c3631ff DT |
441 | |
442 | /* map from 'block kobj' to 'block->instance->controller->main_kobj' | |
443 | * now 'release' the block kobject | |
444 | */ | |
445 | kobject_put(&block->instance->ctl->kobj); | |
e27e3dac DT |
446 | } |
447 | ||
e27e3dac DT |
448 | |
449 | /* Function to 'show' fields from the edac_dev 'block' structure */ | |
450 | static ssize_t edac_dev_block_show(struct kobject *kobj, | |
052dfb45 | 451 | struct attribute *attr, char *buffer) |
e27e3dac | 452 | { |
b2a4ac0c DT |
453 | struct edac_dev_sysfs_block_attribute *block_attr = |
454 | to_block_attr(attr); | |
e27e3dac | 455 | |
079708b9 | 456 | if (block_attr->show) |
b2a4ac0c | 457 | return block_attr->show(kobj, attr, buffer); |
079708b9 | 458 | return -EIO; |
e27e3dac DT |
459 | } |
460 | ||
e27e3dac DT |
461 | /* Function to 'store' fields into the edac_dev 'block' structure */ |
462 | static ssize_t edac_dev_block_store(struct kobject *kobj, | |
052dfb45 DT |
463 | struct attribute *attr, |
464 | const char *buffer, size_t count) | |
e27e3dac | 465 | { |
b2a4ac0c DT |
466 | struct edac_dev_sysfs_block_attribute *block_attr; |
467 | ||
468 | block_attr = to_block_attr(attr); | |
e27e3dac | 469 | |
079708b9 | 470 | if (block_attr->store) |
b2a4ac0c | 471 | return block_attr->store(kobj, attr, buffer, count); |
079708b9 | 472 | return -EIO; |
e27e3dac DT |
473 | } |
474 | ||
e27e3dac | 475 | /* edac_dev file operations for a 'block' */ |
52cf25d0 | 476 | static const struct sysfs_ops device_block_ops = { |
079708b9 DT |
477 | .show = edac_dev_block_show, |
478 | .store = edac_dev_block_store | |
e27e3dac DT |
479 | }; |
480 | ||
e27e3dac | 481 | #define BLOCK_ATTR(_name,_mode,_show,_store) \ |
b2a4ac0c | 482 | static struct edac_dev_sysfs_block_attribute attr_block_##_name = { \ |
052dfb45 DT |
483 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
484 | .show = _show, \ | |
485 | .store = _store, \ | |
e27e3dac DT |
486 | }; |
487 | ||
079708b9 DT |
488 | BLOCK_ATTR(ce_count, S_IRUGO, block_ce_count_show, NULL); |
489 | BLOCK_ATTR(ue_count, S_IRUGO, block_ue_count_show, NULL); | |
e27e3dac DT |
490 | |
491 | /* list of edac_dev 'block' attributes */ | |
625c6b55 | 492 | static struct attribute *device_block_attrs[] = { |
11413893 GKH |
493 | &attr_block_ce_count.attr, |
494 | &attr_block_ue_count.attr, | |
e27e3dac DT |
495 | NULL, |
496 | }; | |
625c6b55 | 497 | ATTRIBUTE_GROUPS(device_block); |
e27e3dac DT |
498 | |
499 | /* The 'ktype' for each edac_dev 'block' */ | |
500 | static struct kobj_type ktype_block_ctrl = { | |
501 | .release = edac_device_ctrl_block_release, | |
502 | .sysfs_ops = &device_block_ops, | |
625c6b55 | 503 | .default_groups = device_block_groups, |
e27e3dac DT |
504 | }; |
505 | ||
1c3631ff | 506 | /* block ctor/dtor code */ |
e27e3dac DT |
507 | |
508 | /* | |
509 | * edac_device_create_block | |
510 | */ | |
079708b9 | 511 | static int edac_device_create_block(struct edac_device_ctl_info *edac_dev, |
052dfb45 | 512 | struct edac_device_instance *instance, |
1c3631ff | 513 | struct edac_device_block *block) |
e27e3dac | 514 | { |
fd309a9d | 515 | int i; |
e27e3dac | 516 | int err; |
fd309a9d | 517 | struct edac_dev_sysfs_block_attribute *sysfs_attrib; |
1c3631ff | 518 | struct kobject *main_kobj; |
e27e3dac | 519 | |
956b9ba1 JP |
520 | edac_dbg(4, "Instance '%s' inst_p=%p block '%s' block_p=%p\n", |
521 | instance->name, instance, block->name, block); | |
522 | edac_dbg(4, "block kobj=%p block kobj->parent=%p\n", | |
523 | &block->kobj, &block->kobj.parent); | |
e27e3dac DT |
524 | |
525 | /* init this block's kobject */ | |
079708b9 | 526 | memset(&block->kobj, 0, sizeof(struct kobject)); |
e27e3dac | 527 | |
1c3631ff | 528 | /* bump the main kobject's reference count for this controller |
25985edc | 529 | * and this instance is dependent on the main |
1c3631ff DT |
530 | */ |
531 | main_kobj = kobject_get(&edac_dev->kobj); | |
532 | if (!main_kobj) { | |
533 | err = -ENODEV; | |
534 | goto err_out; | |
535 | } | |
536 | ||
537 | /* Add this block's kobject */ | |
b2ed215a GKH |
538 | err = kobject_init_and_add(&block->kobj, &ktype_block_ctrl, |
539 | &instance->kobj, | |
540 | "%s", block->name); | |
e27e3dac | 541 | if (err) { |
956b9ba1 | 542 | edac_dbg(1, "Failed to register instance '%s'\n", block->name); |
1c3631ff DT |
543 | kobject_put(main_kobj); |
544 | err = -ENODEV; | |
545 | goto err_out; | |
e27e3dac DT |
546 | } |
547 | ||
fd309a9d DT |
548 | /* If there are driver level block attributes, then added them |
549 | * to the block kobject | |
550 | */ | |
551 | sysfs_attrib = block->block_attributes; | |
b2a4ac0c DT |
552 | if (sysfs_attrib && block->nr_attribs) { |
553 | for (i = 0; i < block->nr_attribs; i++, sysfs_attrib++) { | |
554 | ||
956b9ba1 JP |
555 | edac_dbg(4, "creating block attrib='%s' attrib->%p to kobj=%p\n", |
556 | sysfs_attrib->attr.name, | |
557 | sysfs_attrib, &block->kobj); | |
b2a4ac0c DT |
558 | |
559 | /* Create each block_attribute file */ | |
fd309a9d | 560 | err = sysfs_create_file(&block->kobj, |
b2a4ac0c | 561 | &sysfs_attrib->attr); |
fd309a9d DT |
562 | if (err) |
563 | goto err_on_attrib; | |
fd309a9d DT |
564 | } |
565 | } | |
b2ed215a | 566 | kobject_uevent(&block->kobj, KOBJ_ADD); |
fd309a9d | 567 | |
e27e3dac | 568 | return 0; |
fd309a9d | 569 | |
1c3631ff | 570 | /* Error unwind stack */ |
fd309a9d | 571 | err_on_attrib: |
c10997f6 | 572 | kobject_put(&block->kobj); |
fd309a9d | 573 | |
1c3631ff | 574 | err_out: |
fd309a9d | 575 | return err; |
e27e3dac DT |
576 | } |
577 | ||
578 | /* | |
1c3631ff | 579 | * edac_device_delete_block(edac_dev,block); |
e27e3dac | 580 | */ |
079708b9 | 581 | static void edac_device_delete_block(struct edac_device_ctl_info *edac_dev, |
1c3631ff | 582 | struct edac_device_block *block) |
e27e3dac | 583 | { |
1c3631ff DT |
584 | struct edac_dev_sysfs_block_attribute *sysfs_attrib; |
585 | int i; | |
e27e3dac | 586 | |
1c3631ff DT |
587 | /* if this block has 'attributes' then we need to iterate over the list |
588 | * and 'remove' the attributes on this block | |
589 | */ | |
590 | sysfs_attrib = block->block_attributes; | |
591 | if (sysfs_attrib && block->nr_attribs) { | |
b2a4ac0c DT |
592 | for (i = 0; i < block->nr_attribs; i++, sysfs_attrib++) { |
593 | ||
594 | /* remove each block_attrib file */ | |
1c3631ff DT |
595 | sysfs_remove_file(&block->kobj, |
596 | (struct attribute *) sysfs_attrib); | |
597 | } | |
598 | } | |
e27e3dac | 599 | |
1c3631ff DT |
600 | /* unregister this block's kobject, SEE: |
601 | * edac_device_ctrl_block_release() callback operation | |
602 | */ | |
c10997f6 | 603 | kobject_put(&block->kobj); |
e27e3dac DT |
604 | } |
605 | ||
1c3631ff | 606 | /* instance ctor/dtor code */ |
e27e3dac DT |
607 | |
608 | /* | |
609 | * edac_device_create_instance | |
610 | * create just one instance of an edac_device 'instance' | |
611 | */ | |
079708b9 | 612 | static int edac_device_create_instance(struct edac_device_ctl_info *edac_dev, |
052dfb45 | 613 | int idx) |
e27e3dac DT |
614 | { |
615 | int i, j; | |
616 | int err; | |
617 | struct edac_device_instance *instance; | |
1c3631ff | 618 | struct kobject *main_kobj; |
e27e3dac DT |
619 | |
620 | instance = &edac_dev->instances[idx]; | |
621 | ||
622 | /* Init the instance's kobject */ | |
079708b9 | 623 | memset(&instance->kobj, 0, sizeof(struct kobject)); |
e27e3dac | 624 | |
1c3631ff | 625 | instance->ctl = edac_dev; |
e27e3dac | 626 | |
1c3631ff | 627 | /* bump the main kobject's reference count for this controller |
25985edc | 628 | * and this instance is dependent on the main |
1c3631ff DT |
629 | */ |
630 | main_kobj = kobject_get(&edac_dev->kobj); | |
631 | if (!main_kobj) { | |
632 | err = -ENODEV; | |
633 | goto err_out; | |
634 | } | |
e27e3dac | 635 | |
b2ed215a GKH |
636 | /* Formally register this instance's kobject under the edac_device */ |
637 | err = kobject_init_and_add(&instance->kobj, &ktype_instance_ctrl, | |
638 | &edac_dev->kobj, "%s", instance->name); | |
e27e3dac | 639 | if (err != 0) { |
956b9ba1 JP |
640 | edac_dbg(2, "Failed to register instance '%s'\n", |
641 | instance->name); | |
1c3631ff DT |
642 | kobject_put(main_kobj); |
643 | goto err_out; | |
e27e3dac DT |
644 | } |
645 | ||
956b9ba1 JP |
646 | edac_dbg(4, "now register '%d' blocks for instance %d\n", |
647 | instance->nr_blocks, idx); | |
e27e3dac DT |
648 | |
649 | /* register all blocks of this instance */ | |
079708b9 | 650 | for (i = 0; i < instance->nr_blocks; i++) { |
1c3631ff DT |
651 | err = edac_device_create_block(edac_dev, instance, |
652 | &instance->blocks[i]); | |
e27e3dac | 653 | if (err) { |
1c3631ff | 654 | /* If any fail, remove all previous ones */ |
52490c8d | 655 | for (j = 0; j < i; j++) |
1c3631ff DT |
656 | edac_device_delete_block(edac_dev, |
657 | &instance->blocks[j]); | |
658 | goto err_release_instance_kobj; | |
e27e3dac DT |
659 | } |
660 | } | |
b2ed215a | 661 | kobject_uevent(&instance->kobj, KOBJ_ADD); |
e27e3dac | 662 | |
956b9ba1 JP |
663 | edac_dbg(4, "Registered instance %d '%s' kobject\n", |
664 | idx, instance->name); | |
e27e3dac DT |
665 | |
666 | return 0; | |
1c3631ff DT |
667 | |
668 | /* error unwind stack */ | |
669 | err_release_instance_kobj: | |
c10997f6 | 670 | kobject_put(&instance->kobj); |
1c3631ff DT |
671 | |
672 | err_out: | |
673 | return err; | |
e27e3dac DT |
674 | } |
675 | ||
676 | /* | |
677 | * edac_device_remove_instance | |
678 | * remove an edac_device instance | |
679 | */ | |
079708b9 DT |
680 | static void edac_device_delete_instance(struct edac_device_ctl_info *edac_dev, |
681 | int idx) | |
e27e3dac | 682 | { |
e27e3dac | 683 | struct edac_device_instance *instance; |
1c3631ff | 684 | int i; |
e27e3dac DT |
685 | |
686 | instance = &edac_dev->instances[idx]; | |
687 | ||
688 | /* unregister all blocks in this instance */ | |
52490c8d | 689 | for (i = 0; i < instance->nr_blocks; i++) |
1c3631ff | 690 | edac_device_delete_block(edac_dev, &instance->blocks[i]); |
e27e3dac | 691 | |
1c3631ff DT |
692 | /* unregister this instance's kobject, SEE: |
693 | * edac_device_ctrl_instance_release() for callback operation | |
694 | */ | |
c10997f6 | 695 | kobject_put(&instance->kobj); |
e27e3dac DT |
696 | } |
697 | ||
698 | /* | |
699 | * edac_device_create_instances | |
700 | * create the first level of 'instances' for this device | |
701 | * (ie 'cache' might have 'cache0', 'cache1', 'cache2', etc | |
702 | */ | |
703 | static int edac_device_create_instances(struct edac_device_ctl_info *edac_dev) | |
704 | { | |
705 | int i, j; | |
706 | int err; | |
707 | ||
956b9ba1 | 708 | edac_dbg(0, "\n"); |
e27e3dac DT |
709 | |
710 | /* iterate over creation of the instances */ | |
079708b9 DT |
711 | for (i = 0; i < edac_dev->nr_instances; i++) { |
712 | err = edac_device_create_instance(edac_dev, i); | |
e27e3dac DT |
713 | if (err) { |
714 | /* unwind previous instances on error */ | |
52490c8d | 715 | for (j = 0; j < i; j++) |
079708b9 | 716 | edac_device_delete_instance(edac_dev, j); |
e27e3dac DT |
717 | return err; |
718 | } | |
719 | } | |
720 | ||
721 | return 0; | |
722 | } | |
723 | ||
724 | /* | |
725 | * edac_device_delete_instances(edac_dev); | |
726 | * unregister all the kobjects of the instances | |
727 | */ | |
728 | static void edac_device_delete_instances(struct edac_device_ctl_info *edac_dev) | |
729 | { | |
730 | int i; | |
731 | ||
732 | /* iterate over creation of the instances */ | |
52490c8d | 733 | for (i = 0; i < edac_dev->nr_instances; i++) |
079708b9 | 734 | edac_device_delete_instance(edac_dev, i); |
e27e3dac DT |
735 | } |
736 | ||
1c3631ff | 737 | /* edac_dev sysfs ctor/dtor code */ |
e27e3dac | 738 | |
42a8e397 | 739 | /* |
1c3631ff | 740 | * edac_device_add_main_sysfs_attributes |
42a8e397 DT |
741 | * add some attributes to this instance's main kobject |
742 | */ | |
1c3631ff | 743 | static int edac_device_add_main_sysfs_attributes( |
42a8e397 DT |
744 | struct edac_device_ctl_info *edac_dev) |
745 | { | |
052dfb45 | 746 | struct edac_dev_sysfs_attribute *sysfs_attrib; |
1c3631ff | 747 | int err = 0; |
052dfb45 | 748 | |
052dfb45 | 749 | sysfs_attrib = edac_dev->sysfs_attributes; |
1c3631ff DT |
750 | if (sysfs_attrib) { |
751 | /* iterate over the array and create an attribute for each | |
752 | * entry in the list | |
753 | */ | |
754 | while (sysfs_attrib->attr.name != NULL) { | |
755 | err = sysfs_create_file(&edac_dev->kobj, | |
052dfb45 | 756 | (struct attribute*) sysfs_attrib); |
1c3631ff DT |
757 | if (err) |
758 | goto err_out; | |
052dfb45 | 759 | |
1c3631ff DT |
760 | sysfs_attrib++; |
761 | } | |
052dfb45 | 762 | } |
42a8e397 | 763 | |
1c3631ff DT |
764 | err_out: |
765 | return err; | |
766 | } | |
767 | ||
768 | /* | |
769 | * edac_device_remove_main_sysfs_attributes | |
770 | * remove any attributes to this instance's main kobject | |
771 | */ | |
772 | static void edac_device_remove_main_sysfs_attributes( | |
773 | struct edac_device_ctl_info *edac_dev) | |
774 | { | |
775 | struct edac_dev_sysfs_attribute *sysfs_attrib; | |
776 | ||
777 | /* if there are main attributes, defined, remove them. First, | |
778 | * point to the start of the array and iterate over it | |
779 | * removing each attribute listed from this device's instance's kobject | |
780 | */ | |
781 | sysfs_attrib = edac_dev->sysfs_attributes; | |
782 | if (sysfs_attrib) { | |
783 | while (sysfs_attrib->attr.name != NULL) { | |
784 | sysfs_remove_file(&edac_dev->kobj, | |
785 | (struct attribute *) sysfs_attrib); | |
786 | sysfs_attrib++; | |
787 | } | |
788 | } | |
42a8e397 DT |
789 | } |
790 | ||
e27e3dac DT |
791 | /* |
792 | * edac_device_create_sysfs() Constructor | |
793 | * | |
1c3631ff DT |
794 | * accept a created edac_device control structure |
795 | * and 'export' it to sysfs. The 'main' kobj should already have been | |
796 | * created. 'instance' and 'block' kobjects should be registered | |
797 | * along with any 'block' attributes from the low driver. In addition, | |
798 | * the main attributes (if any) are connected to the main kobject of | |
799 | * the control structure. | |
e27e3dac DT |
800 | * |
801 | * Return: | |
802 | * 0 Success | |
803 | * !0 Failure | |
804 | */ | |
805 | int edac_device_create_sysfs(struct edac_device_ctl_info *edac_dev) | |
806 | { | |
807 | int err; | |
079708b9 | 808 | struct kobject *edac_kobj = &edac_dev->kobj; |
e27e3dac | 809 | |
956b9ba1 | 810 | edac_dbg(0, "idx=%d\n", edac_dev->dev_idx); |
e27e3dac | 811 | |
1c3631ff DT |
812 | /* go create any main attributes callers wants */ |
813 | err = edac_device_add_main_sysfs_attributes(edac_dev); | |
814 | if (err) { | |
956b9ba1 | 815 | edac_dbg(0, "failed to add sysfs attribs\n"); |
1c3631ff | 816 | goto err_out; |
42a8e397 DT |
817 | } |
818 | ||
e27e3dac DT |
819 | /* create a symlink from the edac device |
820 | * to the platform 'device' being used for this | |
821 | */ | |
822 | err = sysfs_create_link(edac_kobj, | |
079708b9 | 823 | &edac_dev->dev->kobj, EDAC_DEVICE_SYMLINK); |
e27e3dac | 824 | if (err) { |
956b9ba1 | 825 | edac_dbg(0, "sysfs_create_link() returned err= %d\n", err); |
1c3631ff | 826 | goto err_remove_main_attribs; |
e27e3dac DT |
827 | } |
828 | ||
1c3631ff DT |
829 | /* Create the first level instance directories |
830 | * In turn, the nested blocks beneath the instances will | |
831 | * be registered as well | |
832 | */ | |
e27e3dac | 833 | err = edac_device_create_instances(edac_dev); |
1c3631ff | 834 | if (err) { |
956b9ba1 JP |
835 | edac_dbg(0, "edac_device_create_instances() returned err= %d\n", |
836 | err); | |
42a8e397 | 837 | goto err_remove_link; |
1c3631ff DT |
838 | } |
839 | ||
840 | ||
956b9ba1 | 841 | edac_dbg(4, "create-instances done, idx=%d\n", edac_dev->dev_idx); |
e27e3dac DT |
842 | |
843 | return 0; | |
844 | ||
845 | /* Error unwind stack */ | |
42a8e397 DT |
846 | err_remove_link: |
847 | /* remove the sym link */ | |
848 | sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK); | |
e27e3dac | 849 | |
1c3631ff DT |
850 | err_remove_main_attribs: |
851 | edac_device_remove_main_sysfs_attributes(edac_dev); | |
e27e3dac | 852 | |
1c3631ff | 853 | err_out: |
e27e3dac DT |
854 | return err; |
855 | } | |
856 | ||
857 | /* | |
858 | * edac_device_remove_sysfs() destructor | |
859 | * | |
1c3631ff | 860 | * given an edac_device struct, tear down the kobject resources |
e27e3dac DT |
861 | */ |
862 | void edac_device_remove_sysfs(struct edac_device_ctl_info *edac_dev) | |
863 | { | |
956b9ba1 | 864 | edac_dbg(0, "\n"); |
e27e3dac | 865 | |
1c3631ff DT |
866 | /* remove any main attributes for this device */ |
867 | edac_device_remove_main_sysfs_attributes(edac_dev); | |
e27e3dac | 868 | |
1c3631ff | 869 | /* remove the device sym link */ |
e27e3dac DT |
870 | sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK); |
871 | ||
1c3631ff DT |
872 | /* walk the instance/block kobject tree, deconstructing it */ |
873 | edac_device_delete_instances(edac_dev); | |
e27e3dac | 874 | } |