Commit | Line | Data |
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e27e3dac DT |
1 | |
2 | /* | |
3 | * edac_device.c | |
4 | * (C) 2007 www.douglaskthompson.com | |
5 | * | |
6 | * This file may be distributed under the terms of the | |
7 | * GNU General Public License. | |
8 | * | |
9 | * Written by Doug Thompson <norsk5@xmission.com> | |
10 | * | |
11 | * edac_device API implementation | |
12 | * 19 Jan 2007 | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/smp.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/sysctl.h> | |
20 | #include <linux/highmem.h> | |
21 | #include <linux/timer.h> | |
22 | #include <linux/slab.h> | |
52490c8d | 23 | #include <linux/jiffies.h> |
e27e3dac DT |
24 | #include <linux/spinlock.h> |
25 | #include <linux/list.h> | |
26 | #include <linux/sysdev.h> | |
27 | #include <linux/ctype.h> | |
28 | #include <linux/workqueue.h> | |
29 | #include <asm/uaccess.h> | |
30 | #include <asm/page.h> | |
31 | ||
32 | #include "edac_core.h" | |
33 | #include "edac_module.h" | |
34 | ||
52490c8d | 35 | /* lock to memory controller's control array 'edac_device_list' */ |
0ca84761 | 36 | static DEFINE_MUTEX(device_ctls_mutex); |
e27e3dac DT |
37 | static struct list_head edac_device_list = LIST_HEAD_INIT(edac_device_list); |
38 | ||
e27e3dac DT |
39 | #ifdef CONFIG_EDAC_DEBUG |
40 | static void edac_device_dump_device(struct edac_device_ctl_info *edac_dev) | |
41 | { | |
079708b9 | 42 | debugf3("\tedac_dev = %p dev_idx=%d \n", edac_dev, edac_dev->dev_idx); |
e27e3dac DT |
43 | debugf4("\tedac_dev->edac_check = %p\n", edac_dev->edac_check); |
44 | debugf3("\tdev = %p\n", edac_dev->dev); | |
45 | debugf3("\tmod_name:ctl_name = %s:%s\n", | |
46 | edac_dev->mod_name, edac_dev->ctl_name); | |
47 | debugf3("\tpvt_info = %p\n\n", edac_dev->pvt_info); | |
48 | } | |
079708b9 | 49 | #endif /* CONFIG_EDAC_DEBUG */ |
e27e3dac DT |
50 | |
51 | /* | |
52490c8d DT |
52 | * edac_device_alloc_ctl_info() |
53 | * Allocate a new edac device control info structure | |
54 | * | |
55 | * The control structure is allocated in complete chunk | |
56 | * from the OS. It is in turn sub allocated to the | |
57 | * various objects that compose the struture | |
58 | * | |
59 | * The structure has a 'nr_instance' array within itself. | |
60 | * Each instance represents a major component | |
61 | * Example: L1 cache and L2 cache are 2 instance components | |
62 | * | |
63 | * Within each instance is an array of 'nr_blocks' blockoffsets | |
e27e3dac DT |
64 | */ |
65 | struct edac_device_ctl_info *edac_device_alloc_ctl_info( | |
66 | unsigned sz_private, | |
52490c8d DT |
67 | char *edac_device_name, unsigned nr_instances, |
68 | char *edac_block_name, unsigned nr_blocks, | |
69 | unsigned offset_value, /* zero, 1, or other based offset */ | |
fd309a9d | 70 | struct edac_dev_sysfs_block_attribute *attrib_spec, unsigned nr_attrib) |
e27e3dac DT |
71 | { |
72 | struct edac_device_ctl_info *dev_ctl; | |
73 | struct edac_device_instance *dev_inst, *inst; | |
74 | struct edac_device_block *dev_blk, *blk_p, *blk; | |
fd309a9d | 75 | struct edac_dev_sysfs_block_attribute *dev_attrib, *attrib_p, *attrib; |
e27e3dac DT |
76 | unsigned total_size; |
77 | unsigned count; | |
78 | unsigned instance, block, attr; | |
79 | void *pvt; | |
80 | ||
81 | debugf1("%s() instances=%d blocks=%d\n", | |
079708b9 | 82 | __func__, nr_instances, nr_blocks); |
e27e3dac | 83 | |
fd309a9d DT |
84 | /* Calculate the size of memory we need to allocate AND |
85 | * determine the offsets of the various item arrays | |
86 | * (instance,block,attrib) from the start of an allocated structure. | |
87 | * We want the alignment of each item (instance,block,attrib) | |
e27e3dac DT |
88 | * to be at least as stringent as what the compiler would |
89 | * provide if we could simply hardcode everything into a single struct. | |
90 | */ | |
52490c8d | 91 | dev_ctl = (struct edac_device_ctl_info *)NULL; |
e27e3dac | 92 | |
fd309a9d DT |
93 | /* Calc the 'end' offset past end of ONE ctl_info structure |
94 | * which will become the start of the 'instance' array | |
95 | */ | |
7391c6dc | 96 | dev_inst = edac_align_ptr(&dev_ctl[1], sizeof(*dev_inst)); |
e27e3dac | 97 | |
fd309a9d DT |
98 | /* Calc the 'end' offset past the instance array within the ctl_info |
99 | * which will become the start of the block array | |
100 | */ | |
7391c6dc | 101 | dev_blk = edac_align_ptr(&dev_inst[nr_instances], sizeof(*dev_blk)); |
e27e3dac | 102 | |
fd309a9d DT |
103 | /* Calc the 'end' offset past the dev_blk array |
104 | * which will become the start of the attrib array, if any. | |
105 | */ | |
e27e3dac | 106 | count = nr_instances * nr_blocks; |
7391c6dc | 107 | dev_attrib = edac_align_ptr(&dev_blk[count], sizeof(*dev_attrib)); |
e27e3dac | 108 | |
fd309a9d DT |
109 | /* Check for case of when an attribute array is specified */ |
110 | if (nr_attrib > 0) { | |
111 | /* calc how many nr_attrib we need */ | |
112 | count *= nr_attrib; | |
e27e3dac | 113 | |
fd309a9d DT |
114 | /* Calc the 'end' offset past the attributes array */ |
115 | pvt = edac_align_ptr(&dev_attrib[count], sz_private); | |
116 | } else { | |
117 | /* no attribute array specificed */ | |
118 | pvt = edac_align_ptr(dev_attrib, sz_private); | |
119 | } | |
120 | ||
121 | /* 'pvt' now points to where the private data area is. | |
122 | * At this point 'pvt' (like dev_inst,dev_blk and dev_attrib) | |
123 | * is baselined at ZERO | |
124 | */ | |
079708b9 | 125 | total_size = ((unsigned long)pvt) + sz_private; |
e27e3dac DT |
126 | |
127 | /* Allocate the amount of memory for the set of control structures */ | |
52490c8d DT |
128 | dev_ctl = kzalloc(total_size, GFP_KERNEL); |
129 | if (dev_ctl == NULL) | |
e27e3dac DT |
130 | return NULL; |
131 | ||
fd309a9d DT |
132 | /* Adjust pointers so they point within the actual memory we |
133 | * just allocated rather than an imaginary chunk of memory | |
134 | * located at address 0. | |
135 | * 'dev_ctl' points to REAL memory, while the others are | |
136 | * ZERO based and thus need to be adjusted to point within | |
137 | * the allocated memory. | |
e27e3dac DT |
138 | */ |
139 | dev_inst = (struct edac_device_instance *) | |
052dfb45 | 140 | (((char *)dev_ctl) + ((unsigned long)dev_inst)); |
e27e3dac | 141 | dev_blk = (struct edac_device_block *) |
052dfb45 | 142 | (((char *)dev_ctl) + ((unsigned long)dev_blk)); |
fd309a9d | 143 | dev_attrib = (struct edac_dev_sysfs_block_attribute *) |
052dfb45 | 144 | (((char *)dev_ctl) + ((unsigned long)dev_attrib)); |
079708b9 | 145 | pvt = sz_private ? (((char *)dev_ctl) + ((unsigned long)pvt)) : NULL; |
e27e3dac | 146 | |
fd309a9d | 147 | /* Begin storing the information into the control info structure */ |
e27e3dac DT |
148 | dev_ctl->nr_instances = nr_instances; |
149 | dev_ctl->instances = dev_inst; | |
150 | dev_ctl->pvt_info = pvt; | |
151 | ||
52490c8d DT |
152 | /* Name of this edac device */ |
153 | snprintf(dev_ctl->name,sizeof(dev_ctl->name),"%s",edac_device_name); | |
e27e3dac DT |
154 | |
155 | /* Initialize every Instance */ | |
156 | for (instance = 0; instance < nr_instances; instance++) { | |
157 | inst = &dev_inst[instance]; | |
158 | inst->ctl = dev_ctl; | |
159 | inst->nr_blocks = nr_blocks; | |
160 | blk_p = &dev_blk[instance * nr_blocks]; | |
161 | inst->blocks = blk_p; | |
162 | ||
163 | /* name of this instance */ | |
164 | snprintf(inst->name, sizeof(inst->name), | |
079708b9 | 165 | "%s%u", edac_device_name, instance); |
e27e3dac DT |
166 | |
167 | /* Initialize every block in each instance */ | |
079708b9 | 168 | for (block = 0; block < nr_blocks; block++) { |
e27e3dac DT |
169 | blk = &blk_p[block]; |
170 | blk->instance = inst; | |
e27e3dac | 171 | snprintf(blk->name, sizeof(blk->name), |
d391a7b8 | 172 | "%s%d", edac_block_name, block+offset_value); |
e27e3dac DT |
173 | |
174 | debugf1("%s() instance=%d block=%d name=%s\n", | |
079708b9 | 175 | __func__, instance, block, blk->name); |
e27e3dac | 176 | |
fd309a9d DT |
177 | /* if there are NO attributes OR no attribute pointer |
178 | * then continue on to next block iteration | |
179 | */ | |
180 | if ((nr_attrib == 0) || (attrib_spec == NULL)) | |
181 | continue; | |
182 | ||
183 | /* setup the attribute array for this block */ | |
184 | blk->nr_attribs = nr_attrib; | |
185 | attrib_p = &dev_attrib[block*nr_instances*nr_attrib]; | |
186 | blk->block_attributes = attrib_p; | |
187 | ||
188 | /* Initialize every user specified attribute in this | |
189 | * block with the data the caller passed in | |
190 | */ | |
191 | for (attr = 0; attr < nr_attrib; attr++) { | |
192 | attrib = &attrib_p[attr]; | |
193 | attrib->attr = attrib_spec->attr; | |
194 | attrib->show = attrib_spec->show; | |
195 | attrib->store = attrib_spec->store; | |
196 | ||
197 | /* up reference this block */ | |
198 | attrib->block = blk; | |
199 | ||
200 | /* bump the attrib_spec */ | |
201 | attrib_spec++; | |
e27e3dac DT |
202 | } |
203 | } | |
204 | } | |
205 | ||
206 | /* Mark this instance as merely ALLOCATED */ | |
207 | dev_ctl->op_state = OP_ALLOC; | |
208 | ||
209 | return dev_ctl; | |
210 | } | |
211 | EXPORT_SYMBOL_GPL(edac_device_alloc_ctl_info); | |
212 | ||
213 | /* | |
214 | * edac_device_free_ctl_info() | |
215 | * frees the memory allocated by the edac_device_alloc_ctl_info() | |
216 | * function | |
217 | */ | |
079708b9 DT |
218 | void edac_device_free_ctl_info(struct edac_device_ctl_info *ctl_info) |
219 | { | |
e27e3dac DT |
220 | kfree(ctl_info); |
221 | } | |
079708b9 | 222 | EXPORT_SYMBOL_GPL(edac_device_free_ctl_info); |
e27e3dac DT |
223 | |
224 | /* | |
225 | * find_edac_device_by_dev | |
226 | * scans the edac_device list for a specific 'struct device *' | |
52490c8d DT |
227 | * |
228 | * lock to be held prior to call: device_ctls_mutex | |
229 | * | |
230 | * Return: | |
231 | * pointer to control structure managing 'dev' | |
232 | * NULL if not found on list | |
e27e3dac | 233 | */ |
079708b9 | 234 | static struct edac_device_ctl_info *find_edac_device_by_dev(struct device *dev) |
e27e3dac DT |
235 | { |
236 | struct edac_device_ctl_info *edac_dev; | |
237 | struct list_head *item; | |
238 | ||
239 | debugf3("%s()\n", __func__); | |
240 | ||
241 | list_for_each(item, &edac_device_list) { | |
242 | edac_dev = list_entry(item, struct edac_device_ctl_info, link); | |
243 | ||
244 | if (edac_dev->dev == dev) | |
245 | return edac_dev; | |
246 | } | |
247 | ||
248 | return NULL; | |
249 | } | |
250 | ||
251 | /* | |
252 | * add_edac_dev_to_global_list | |
253 | * Before calling this function, caller must | |
254 | * assign a unique value to edac_dev->dev_idx. | |
52490c8d DT |
255 | * |
256 | * lock to be held prior to call: device_ctls_mutex | |
257 | * | |
e27e3dac DT |
258 | * Return: |
259 | * 0 on success | |
260 | * 1 on failure. | |
261 | */ | |
079708b9 | 262 | static int add_edac_dev_to_global_list(struct edac_device_ctl_info *edac_dev) |
e27e3dac DT |
263 | { |
264 | struct list_head *item, *insert_before; | |
265 | struct edac_device_ctl_info *rover; | |
266 | ||
267 | insert_before = &edac_device_list; | |
268 | ||
269 | /* Determine if already on the list */ | |
52490c8d DT |
270 | rover = find_edac_device_by_dev(edac_dev->dev); |
271 | if (unlikely(rover != NULL)) | |
e27e3dac DT |
272 | goto fail0; |
273 | ||
274 | /* Insert in ascending order by 'dev_idx', so find position */ | |
275 | list_for_each(item, &edac_device_list) { | |
276 | rover = list_entry(item, struct edac_device_ctl_info, link); | |
277 | ||
278 | if (rover->dev_idx >= edac_dev->dev_idx) { | |
279 | if (unlikely(rover->dev_idx == edac_dev->dev_idx)) | |
280 | goto fail1; | |
281 | ||
282 | insert_before = item; | |
283 | break; | |
284 | } | |
285 | } | |
286 | ||
287 | list_add_tail_rcu(&edac_dev->link, insert_before); | |
288 | return 0; | |
289 | ||
052dfb45 | 290 | fail0: |
e27e3dac | 291 | edac_printk(KERN_WARNING, EDAC_MC, |
052dfb45 DT |
292 | "%s (%s) %s %s already assigned %d\n", |
293 | rover->dev->bus_id, dev_name(rover), | |
294 | rover->mod_name, rover->ctl_name, rover->dev_idx); | |
e27e3dac DT |
295 | return 1; |
296 | ||
052dfb45 | 297 | fail1: |
e27e3dac | 298 | edac_printk(KERN_WARNING, EDAC_MC, |
052dfb45 DT |
299 | "bug in low-level driver: attempt to assign\n" |
300 | " duplicate dev_idx %d in %s()\n", rover->dev_idx, | |
301 | __func__); | |
e27e3dac DT |
302 | return 1; |
303 | } | |
304 | ||
305 | /* | |
306 | * complete_edac_device_list_del | |
52490c8d DT |
307 | * |
308 | * callback function when reference count is zero | |
e27e3dac DT |
309 | */ |
310 | static void complete_edac_device_list_del(struct rcu_head *head) | |
311 | { | |
312 | struct edac_device_ctl_info *edac_dev; | |
313 | ||
314 | edac_dev = container_of(head, struct edac_device_ctl_info, rcu); | |
315 | INIT_LIST_HEAD(&edac_dev->link); | |
316 | complete(&edac_dev->complete); | |
317 | } | |
318 | ||
319 | /* | |
320 | * del_edac_device_from_global_list | |
52490c8d DT |
321 | * |
322 | * remove the RCU, setup for a callback call, then wait for the | |
323 | * callback to occur | |
e27e3dac | 324 | */ |
079708b9 | 325 | static void del_edac_device_from_global_list(struct edac_device_ctl_info |
052dfb45 | 326 | *edac_device) |
e27e3dac DT |
327 | { |
328 | list_del_rcu(&edac_device->link); | |
329 | init_completion(&edac_device->complete); | |
330 | call_rcu(&edac_device->rcu, complete_edac_device_list_del); | |
331 | wait_for_completion(&edac_device->complete); | |
332 | } | |
333 | ||
334 | /** | |
335 | * edac_device_find | |
336 | * Search for a edac_device_ctl_info structure whose index is 'idx'. | |
337 | * | |
338 | * If found, return a pointer to the structure. | |
339 | * Else return NULL. | |
340 | * | |
341 | * Caller must hold device_ctls_mutex. | |
342 | */ | |
079708b9 | 343 | struct edac_device_ctl_info *edac_device_find(int idx) |
e27e3dac DT |
344 | { |
345 | struct list_head *item; | |
346 | struct edac_device_ctl_info *edac_dev; | |
347 | ||
348 | /* Iterate over list, looking for exact match of ID */ | |
349 | list_for_each(item, &edac_device_list) { | |
350 | edac_dev = list_entry(item, struct edac_device_ctl_info, link); | |
351 | ||
352 | if (edac_dev->dev_idx >= idx) { | |
353 | if (edac_dev->dev_idx == idx) | |
354 | return edac_dev; | |
355 | ||
356 | /* not on list, so terminate early */ | |
357 | break; | |
358 | } | |
359 | } | |
360 | ||
361 | return NULL; | |
362 | } | |
52490c8d | 363 | EXPORT_SYMBOL_GPL(edac_device_find); |
e27e3dac DT |
364 | |
365 | /* | |
81d87cb1 | 366 | * edac_device_workq_function |
e27e3dac DT |
367 | * performs the operation scheduled by a workq request |
368 | */ | |
81d87cb1 | 369 | static void edac_device_workq_function(struct work_struct *work_req) |
e27e3dac | 370 | { |
079708b9 DT |
371 | struct delayed_work *d_work = (struct delayed_work *)work_req; |
372 | struct edac_device_ctl_info *edac_dev = to_edac_device_ctl_work(d_work); | |
e27e3dac DT |
373 | |
374 | //debugf0("%s() here and running\n", __func__); | |
0ca84761 | 375 | mutex_lock(&device_ctls_mutex); |
e27e3dac DT |
376 | |
377 | /* Only poll controllers that are running polled and have a check */ | |
378 | if ((edac_dev->op_state == OP_RUNNING_POLL) && | |
052dfb45 DT |
379 | (edac_dev->edac_check != NULL)) { |
380 | edac_dev->edac_check(edac_dev); | |
e27e3dac DT |
381 | } |
382 | ||
0ca84761 | 383 | mutex_unlock(&device_ctls_mutex); |
e27e3dac DT |
384 | |
385 | /* Reschedule */ | |
079708b9 | 386 | queue_delayed_work(edac_workqueue, &edac_dev->work, edac_dev->delay); |
e27e3dac DT |
387 | } |
388 | ||
389 | /* | |
81d87cb1 | 390 | * edac_device_workq_setup |
e27e3dac DT |
391 | * initialize a workq item for this edac_device instance |
392 | * passing in the new delay period in msec | |
393 | */ | |
81d87cb1 | 394 | void edac_device_workq_setup(struct edac_device_ctl_info *edac_dev, |
052dfb45 | 395 | unsigned msec) |
e27e3dac DT |
396 | { |
397 | debugf0("%s()\n", __func__); | |
398 | ||
399 | edac_dev->poll_msec = msec; | |
52490c8d | 400 | edac_dev->delay = msecs_to_jiffies(msec); /* Calc delay jiffies */ |
e27e3dac | 401 | |
81d87cb1 | 402 | INIT_DELAYED_WORK(&edac_dev->work, edac_device_workq_function); |
81d87cb1 | 403 | queue_delayed_work(edac_workqueue, &edac_dev->work, edac_dev->delay); |
e27e3dac DT |
404 | } |
405 | ||
406 | /* | |
81d87cb1 | 407 | * edac_device_workq_teardown |
e27e3dac DT |
408 | * stop the workq processing on this edac_dev |
409 | */ | |
81d87cb1 | 410 | void edac_device_workq_teardown(struct edac_device_ctl_info *edac_dev) |
e27e3dac DT |
411 | { |
412 | int status; | |
413 | ||
414 | status = cancel_delayed_work(&edac_dev->work); | |
415 | if (status == 0) { | |
416 | /* workq instance might be running, wait for it */ | |
417 | flush_workqueue(edac_workqueue); | |
418 | } | |
419 | } | |
420 | ||
421 | /* | |
422 | * edac_device_reset_delay_period | |
423 | */ | |
424 | ||
079708b9 | 425 | void edac_device_reset_delay_period(struct edac_device_ctl_info *edac_dev, |
052dfb45 | 426 | unsigned long value) |
e27e3dac | 427 | { |
0ca84761 | 428 | mutex_lock(&device_ctls_mutex); |
e27e3dac DT |
429 | |
430 | /* cancel the current workq request */ | |
81d87cb1 | 431 | edac_device_workq_teardown(edac_dev); |
e27e3dac DT |
432 | |
433 | /* restart the workq request, with new delay value */ | |
81d87cb1 | 434 | edac_device_workq_setup(edac_dev, value); |
e27e3dac | 435 | |
0ca84761 | 436 | mutex_unlock(&device_ctls_mutex); |
e27e3dac DT |
437 | } |
438 | ||
e27e3dac DT |
439 | /** |
440 | * edac_device_add_device: Insert the 'edac_dev' structure into the | |
441 | * edac_device global list and create sysfs entries associated with | |
442 | * edac_device structure. | |
443 | * @edac_device: pointer to the edac_device structure to be added to the list | |
444 | * @edac_idx: A unique numeric identifier to be assigned to the | |
445 | * 'edac_device' structure. | |
446 | * | |
447 | * Return: | |
448 | * 0 Success | |
449 | * !0 Failure | |
450 | */ | |
451 | int edac_device_add_device(struct edac_device_ctl_info *edac_dev, int edac_idx) | |
452 | { | |
453 | debugf0("%s()\n", __func__); | |
454 | ||
455 | edac_dev->dev_idx = edac_idx; | |
456 | #ifdef CONFIG_EDAC_DEBUG | |
457 | if (edac_debug_level >= 3) | |
458 | edac_device_dump_device(edac_dev); | |
459 | #endif | |
0ca84761 | 460 | mutex_lock(&device_ctls_mutex); |
e27e3dac DT |
461 | |
462 | if (add_edac_dev_to_global_list(edac_dev)) | |
463 | goto fail0; | |
464 | ||
465 | /* set load time so that error rate can be tracked */ | |
466 | edac_dev->start_time = jiffies; | |
467 | ||
468 | /* create this instance's sysfs entries */ | |
469 | if (edac_device_create_sysfs(edac_dev)) { | |
470 | edac_device_printk(edac_dev, KERN_WARNING, | |
052dfb45 | 471 | "failed to create sysfs device\n"); |
e27e3dac DT |
472 | goto fail1; |
473 | } | |
474 | ||
475 | /* If there IS a check routine, then we are running POLLED */ | |
476 | if (edac_dev->edac_check != NULL) { | |
477 | /* This instance is NOW RUNNING */ | |
478 | edac_dev->op_state = OP_RUNNING_POLL; | |
479 | ||
81d87cb1 DJ |
480 | /* |
481 | * enable workq processing on this instance, | |
482 | * default = 1000 msec | |
483 | */ | |
484 | edac_device_workq_setup(edac_dev, 1000); | |
e27e3dac DT |
485 | } else { |
486 | edac_dev->op_state = OP_RUNNING_INTERRUPT; | |
487 | } | |
488 | ||
e27e3dac DT |
489 | /* Report action taken */ |
490 | edac_device_printk(edac_dev, KERN_INFO, | |
052dfb45 DT |
491 | "Giving out device to module '%s' controller " |
492 | "'%s': DEV '%s' (%s)\n", | |
493 | edac_dev->mod_name, | |
494 | edac_dev->ctl_name, | |
495 | dev_name(edac_dev), | |
494d0d55 | 496 | edac_op_state_to_string(edac_dev->op_state)); |
e27e3dac | 497 | |
0ca84761 | 498 | mutex_unlock(&device_ctls_mutex); |
e27e3dac DT |
499 | return 0; |
500 | ||
052dfb45 | 501 | fail1: |
e27e3dac DT |
502 | /* Some error, so remove the entry from the lsit */ |
503 | del_edac_device_from_global_list(edac_dev); | |
504 | ||
052dfb45 | 505 | fail0: |
0ca84761 | 506 | mutex_unlock(&device_ctls_mutex); |
e27e3dac DT |
507 | return 1; |
508 | } | |
509 | EXPORT_SYMBOL_GPL(edac_device_add_device); | |
510 | ||
511 | /** | |
512 | * edac_device_del_device: | |
513 | * Remove sysfs entries for specified edac_device structure and | |
514 | * then remove edac_device structure from global list | |
515 | * | |
516 | * @pdev: | |
517 | * Pointer to 'struct device' representing edac_device | |
518 | * structure to remove. | |
519 | * | |
520 | * Return: | |
521 | * Pointer to removed edac_device structure, | |
522 | * OR NULL if device not found. | |
523 | */ | |
079708b9 | 524 | struct edac_device_ctl_info *edac_device_del_device(struct device *dev) |
e27e3dac DT |
525 | { |
526 | struct edac_device_ctl_info *edac_dev; | |
527 | ||
528 | debugf0("MC: %s()\n", __func__); | |
529 | ||
0ca84761 | 530 | mutex_lock(&device_ctls_mutex); |
e27e3dac | 531 | |
52490c8d DT |
532 | /* Find the structure on the list, if not there, then leave */ |
533 | edac_dev = find_edac_device_by_dev(dev); | |
534 | if (edac_dev == NULL) { | |
0ca84761 | 535 | mutex_unlock(&device_ctls_mutex); |
e27e3dac DT |
536 | return NULL; |
537 | } | |
538 | ||
539 | /* mark this instance as OFFLINE */ | |
540 | edac_dev->op_state = OP_OFFLINE; | |
541 | ||
542 | /* clear workq processing on this instance */ | |
81d87cb1 | 543 | edac_device_workq_teardown(edac_dev); |
e27e3dac DT |
544 | |
545 | /* Tear down the sysfs entries for this instance */ | |
546 | edac_device_remove_sysfs(edac_dev); | |
547 | ||
548 | /* deregister from global list */ | |
549 | del_edac_device_from_global_list(edac_dev); | |
550 | ||
0ca84761 | 551 | mutex_unlock(&device_ctls_mutex); |
e27e3dac DT |
552 | |
553 | edac_printk(KERN_INFO, EDAC_MC, | |
052dfb45 DT |
554 | "Removed device %d for %s %s: DEV %s\n", |
555 | edac_dev->dev_idx, | |
556 | edac_dev->mod_name, edac_dev->ctl_name, dev_name(edac_dev)); | |
e27e3dac DT |
557 | |
558 | return edac_dev; | |
559 | } | |
079708b9 | 560 | EXPORT_SYMBOL_GPL(edac_device_del_device); |
e27e3dac DT |
561 | |
562 | static inline int edac_device_get_log_ce(struct edac_device_ctl_info *edac_dev) | |
563 | { | |
564 | return edac_dev->log_ce; | |
565 | } | |
566 | ||
567 | static inline int edac_device_get_log_ue(struct edac_device_ctl_info *edac_dev) | |
568 | { | |
569 | return edac_dev->log_ue; | |
570 | } | |
571 | ||
079708b9 | 572 | static inline int edac_device_get_panic_on_ue(struct edac_device_ctl_info |
052dfb45 | 573 | *edac_dev) |
e27e3dac DT |
574 | { |
575 | return edac_dev->panic_on_ue; | |
576 | } | |
577 | ||
578 | /* | |
579 | * edac_device_handle_ce | |
580 | * perform a common output and handling of an 'edac_dev' CE event | |
581 | */ | |
582 | void edac_device_handle_ce(struct edac_device_ctl_info *edac_dev, | |
052dfb45 | 583 | int inst_nr, int block_nr, const char *msg) |
e27e3dac DT |
584 | { |
585 | struct edac_device_instance *instance; | |
586 | struct edac_device_block *block = NULL; | |
587 | ||
588 | if ((inst_nr >= edac_dev->nr_instances) || (inst_nr < 0)) { | |
589 | edac_device_printk(edac_dev, KERN_ERR, | |
052dfb45 DT |
590 | "INTERNAL ERROR: 'instance' out of range " |
591 | "(%d >= %d)\n", inst_nr, | |
592 | edac_dev->nr_instances); | |
e27e3dac DT |
593 | return; |
594 | } | |
595 | ||
596 | instance = edac_dev->instances + inst_nr; | |
597 | ||
598 | if ((block_nr >= instance->nr_blocks) || (block_nr < 0)) { | |
599 | edac_device_printk(edac_dev, KERN_ERR, | |
052dfb45 DT |
600 | "INTERNAL ERROR: instance %d 'block' " |
601 | "out of range (%d >= %d)\n", | |
602 | inst_nr, block_nr, | |
603 | instance->nr_blocks); | |
e27e3dac DT |
604 | return; |
605 | } | |
606 | ||
607 | if (instance->nr_blocks > 0) { | |
608 | block = instance->blocks + block_nr; | |
609 | block->counters.ce_count++; | |
610 | } | |
611 | ||
612 | /* Propogate the count up the 'totals' tree */ | |
613 | instance->counters.ce_count++; | |
614 | edac_dev->counters.ce_count++; | |
615 | ||
616 | if (edac_device_get_log_ce(edac_dev)) | |
617 | edac_device_printk(edac_dev, KERN_WARNING, | |
052dfb45 DT |
618 | "CE: %s instance: %s block: %s '%s'\n", |
619 | edac_dev->ctl_name, instance->name, | |
620 | block ? block->name : "N/A", msg); | |
e27e3dac DT |
621 | } |
622 | EXPORT_SYMBOL_GPL(edac_device_handle_ce); | |
623 | ||
624 | /* | |
625 | * edac_device_handle_ue | |
626 | * perform a common output and handling of an 'edac_dev' UE event | |
627 | */ | |
628 | void edac_device_handle_ue(struct edac_device_ctl_info *edac_dev, | |
052dfb45 | 629 | int inst_nr, int block_nr, const char *msg) |
e27e3dac DT |
630 | { |
631 | struct edac_device_instance *instance; | |
632 | struct edac_device_block *block = NULL; | |
633 | ||
634 | if ((inst_nr >= edac_dev->nr_instances) || (inst_nr < 0)) { | |
635 | edac_device_printk(edac_dev, KERN_ERR, | |
052dfb45 DT |
636 | "INTERNAL ERROR: 'instance' out of range " |
637 | "(%d >= %d)\n", inst_nr, | |
638 | edac_dev->nr_instances); | |
e27e3dac DT |
639 | return; |
640 | } | |
641 | ||
642 | instance = edac_dev->instances + inst_nr; | |
643 | ||
644 | if ((block_nr >= instance->nr_blocks) || (block_nr < 0)) { | |
645 | edac_device_printk(edac_dev, KERN_ERR, | |
052dfb45 DT |
646 | "INTERNAL ERROR: instance %d 'block' " |
647 | "out of range (%d >= %d)\n", | |
648 | inst_nr, block_nr, | |
649 | instance->nr_blocks); | |
e27e3dac DT |
650 | return; |
651 | } | |
652 | ||
653 | if (instance->nr_blocks > 0) { | |
654 | block = instance->blocks + block_nr; | |
655 | block->counters.ue_count++; | |
656 | } | |
657 | ||
658 | /* Propogate the count up the 'totals' tree */ | |
659 | instance->counters.ue_count++; | |
660 | edac_dev->counters.ue_count++; | |
661 | ||
662 | if (edac_device_get_log_ue(edac_dev)) | |
663 | edac_device_printk(edac_dev, KERN_EMERG, | |
052dfb45 DT |
664 | "UE: %s instance: %s block: %s '%s'\n", |
665 | edac_dev->ctl_name, instance->name, | |
666 | block ? block->name : "N/A", msg); | |
e27e3dac DT |
667 | |
668 | if (edac_device_get_panic_on_ue(edac_dev)) | |
d391a7b8 | 669 | panic("EDAC %s: UE instance: %s block %s '%s'\n", |
052dfb45 DT |
670 | edac_dev->ctl_name, instance->name, |
671 | block ? block->name : "N/A", msg); | |
e27e3dac | 672 | } |
079708b9 | 673 | EXPORT_SYMBOL_GPL(edac_device_handle_ue); |