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Commit | Line | Data |
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da9bb1d2 AC |
1 | /* |
2 | * edac_mc kernel module | |
49c0dab7 | 3 | * (C) 2005, 2006 Linux Networx (http://lnxi.com) |
da9bb1d2 AC |
4 | * This file may be distributed under the terms of the |
5 | * GNU General Public License. | |
6 | * | |
7 | * Written by Thayne Harbaugh | |
8 | * Based on work by Dan Hollis <goemon at anime dot net> and others. | |
9 | * http://www.anime.net/~goemon/linux-ecc/ | |
10 | * | |
11 | * Modified by Dave Peterson and Doug Thompson | |
12 | * | |
13 | */ | |
14 | ||
da9bb1d2 AC |
15 | #include <linux/module.h> |
16 | #include <linux/proc_fs.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/types.h> | |
19 | #include <linux/smp.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/sysctl.h> | |
22 | #include <linux/highmem.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/jiffies.h> | |
26 | #include <linux/spinlock.h> | |
27 | #include <linux/list.h> | |
28 | #include <linux/sysdev.h> | |
29 | #include <linux/ctype.h> | |
c0d12172 | 30 | #include <linux/edac.h> |
da9bb1d2 AC |
31 | #include <asm/uaccess.h> |
32 | #include <asm/page.h> | |
33 | #include <asm/edac.h> | |
20bcb7a8 | 34 | #include "edac_core.h" |
7c9281d7 | 35 | #include "edac_module.h" |
da9bb1d2 | 36 | |
da9bb1d2 | 37 | /* lock to memory controller's control array */ |
63b7df91 | 38 | static DEFINE_MUTEX(mem_ctls_mutex); |
ff6ac2a6 | 39 | static LIST_HEAD(mc_devices); |
da9bb1d2 | 40 | |
da9bb1d2 AC |
41 | #ifdef CONFIG_EDAC_DEBUG |
42 | ||
2da1c119 | 43 | static void edac_mc_dump_channel(struct channel_info *chan) |
da9bb1d2 AC |
44 | { |
45 | debugf4("\tchannel = %p\n", chan); | |
46 | debugf4("\tchannel->chan_idx = %d\n", chan->chan_idx); | |
47 | debugf4("\tchannel->ce_count = %d\n", chan->ce_count); | |
48 | debugf4("\tchannel->label = '%s'\n", chan->label); | |
49 | debugf4("\tchannel->csrow = %p\n\n", chan->csrow); | |
50 | } | |
51 | ||
2da1c119 | 52 | static void edac_mc_dump_csrow(struct csrow_info *csrow) |
da9bb1d2 AC |
53 | { |
54 | debugf4("\tcsrow = %p\n", csrow); | |
55 | debugf4("\tcsrow->csrow_idx = %d\n", csrow->csrow_idx); | |
079708b9 | 56 | debugf4("\tcsrow->first_page = 0x%lx\n", csrow->first_page); |
da9bb1d2 AC |
57 | debugf4("\tcsrow->last_page = 0x%lx\n", csrow->last_page); |
58 | debugf4("\tcsrow->page_mask = 0x%lx\n", csrow->page_mask); | |
59 | debugf4("\tcsrow->nr_pages = 0x%x\n", csrow->nr_pages); | |
079708b9 | 60 | debugf4("\tcsrow->nr_channels = %d\n", csrow->nr_channels); |
da9bb1d2 AC |
61 | debugf4("\tcsrow->channels = %p\n", csrow->channels); |
62 | debugf4("\tcsrow->mci = %p\n\n", csrow->mci); | |
63 | } | |
64 | ||
2da1c119 | 65 | static void edac_mc_dump_mci(struct mem_ctl_info *mci) |
da9bb1d2 AC |
66 | { |
67 | debugf3("\tmci = %p\n", mci); | |
68 | debugf3("\tmci->mtype_cap = %lx\n", mci->mtype_cap); | |
69 | debugf3("\tmci->edac_ctl_cap = %lx\n", mci->edac_ctl_cap); | |
70 | debugf3("\tmci->edac_cap = %lx\n", mci->edac_cap); | |
71 | debugf4("\tmci->edac_check = %p\n", mci->edac_check); | |
72 | debugf3("\tmci->nr_csrows = %d, csrows = %p\n", | |
73 | mci->nr_csrows, mci->csrows); | |
37f04581 | 74 | debugf3("\tdev = %p\n", mci->dev); |
079708b9 | 75 | debugf3("\tmod_name:ctl_name = %s:%s\n", mci->mod_name, mci->ctl_name); |
da9bb1d2 AC |
76 | debugf3("\tpvt_info = %p\n\n", mci->pvt_info); |
77 | } | |
78 | ||
239642fe BP |
79 | /* |
80 | * keep those in sync with the enum mem_type | |
81 | */ | |
82 | const char *edac_mem_types[] = { | |
83 | "Empty csrow", | |
84 | "Reserved csrow type", | |
85 | "Unknown csrow type", | |
86 | "Fast page mode RAM", | |
87 | "Extended data out RAM", | |
88 | "Burst Extended data out RAM", | |
89 | "Single data rate SDRAM", | |
90 | "Registered single data rate SDRAM", | |
91 | "Double data rate SDRAM", | |
92 | "Registered Double data rate SDRAM", | |
93 | "Rambus DRAM", | |
94 | "Unbuffered DDR2 RAM", | |
95 | "Fully buffered DDR2", | |
96 | "Registered DDR2 RAM", | |
97 | "Rambus XDR", | |
98 | "Unbuffered DDR3 RAM", | |
99 | "Registered DDR3 RAM", | |
100 | }; | |
101 | EXPORT_SYMBOL_GPL(edac_mem_types); | |
102 | ||
079708b9 | 103 | #endif /* CONFIG_EDAC_DEBUG */ |
da9bb1d2 AC |
104 | |
105 | /* 'ptr' points to a possibly unaligned item X such that sizeof(X) is 'size'. | |
106 | * Adjust 'ptr' so that its alignment is at least as stringent as what the | |
107 | * compiler would provide for X and return the aligned result. | |
108 | * | |
109 | * If 'size' is a constant, the compiler will optimize this whole function | |
110 | * down to either a no-op or the addition of a constant to the value of 'ptr'. | |
111 | */ | |
7391c6dc | 112 | void *edac_align_ptr(void *ptr, unsigned size) |
da9bb1d2 AC |
113 | { |
114 | unsigned align, r; | |
115 | ||
116 | /* Here we assume that the alignment of a "long long" is the most | |
117 | * stringent alignment that the compiler will ever provide by default. | |
118 | * As far as I know, this is a reasonable assumption. | |
119 | */ | |
120 | if (size > sizeof(long)) | |
121 | align = sizeof(long long); | |
122 | else if (size > sizeof(int)) | |
123 | align = sizeof(long); | |
124 | else if (size > sizeof(short)) | |
125 | align = sizeof(int); | |
126 | else if (size > sizeof(char)) | |
127 | align = sizeof(short); | |
128 | else | |
079708b9 | 129 | return (char *)ptr; |
da9bb1d2 AC |
130 | |
131 | r = size % align; | |
132 | ||
133 | if (r == 0) | |
079708b9 | 134 | return (char *)ptr; |
da9bb1d2 | 135 | |
7391c6dc | 136 | return (void *)(((unsigned long)ptr) + align - r); |
da9bb1d2 AC |
137 | } |
138 | ||
da9bb1d2 AC |
139 | /** |
140 | * edac_mc_alloc: Allocate a struct mem_ctl_info structure | |
141 | * @size_pvt: size of private storage needed | |
142 | * @nr_csrows: Number of CWROWS needed for this MC | |
143 | * @nr_chans: Number of channels for the MC | |
144 | * | |
145 | * Everything is kmalloc'ed as one big chunk - more efficient. | |
146 | * Only can be used if all structures have the same lifetime - otherwise | |
147 | * you have to allocate and initialize your own structures. | |
148 | * | |
149 | * Use edac_mc_free() to free mc structures allocated by this function. | |
150 | * | |
151 | * Returns: | |
152 | * NULL allocation failed | |
153 | * struct mem_ctl_info pointer | |
154 | */ | |
155 | struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows, | |
b8f6f975 | 156 | unsigned nr_chans, int edac_index) |
da9bb1d2 AC |
157 | { |
158 | struct mem_ctl_info *mci; | |
159 | struct csrow_info *csi, *csrow; | |
160 | struct channel_info *chi, *chp, *chan; | |
161 | void *pvt; | |
162 | unsigned size; | |
163 | int row, chn; | |
8096cfaf | 164 | int err; |
da9bb1d2 AC |
165 | |
166 | /* Figure out the offsets of the various items from the start of an mc | |
167 | * structure. We want the alignment of each item to be at least as | |
168 | * stringent as what the compiler would provide if we could simply | |
169 | * hardcode everything into a single struct. | |
170 | */ | |
079708b9 | 171 | mci = (struct mem_ctl_info *)0; |
7391c6dc DT |
172 | csi = edac_align_ptr(&mci[1], sizeof(*csi)); |
173 | chi = edac_align_ptr(&csi[nr_csrows], sizeof(*chi)); | |
e27e3dac | 174 | pvt = edac_align_ptr(&chi[nr_chans * nr_csrows], sz_pvt); |
079708b9 | 175 | size = ((unsigned long)pvt) + sz_pvt; |
da9bb1d2 | 176 | |
8096cfaf DT |
177 | mci = kzalloc(size, GFP_KERNEL); |
178 | if (mci == NULL) | |
da9bb1d2 AC |
179 | return NULL; |
180 | ||
181 | /* Adjust pointers so they point within the memory we just allocated | |
182 | * rather than an imaginary chunk of memory located at address 0. | |
183 | */ | |
079708b9 DT |
184 | csi = (struct csrow_info *)(((char *)mci) + ((unsigned long)csi)); |
185 | chi = (struct channel_info *)(((char *)mci) + ((unsigned long)chi)); | |
186 | pvt = sz_pvt ? (((char *)mci) + ((unsigned long)pvt)) : NULL; | |
da9bb1d2 | 187 | |
b8f6f975 DT |
188 | /* setup index and various internal pointers */ |
189 | mci->mc_idx = edac_index; | |
da9bb1d2 AC |
190 | mci->csrows = csi; |
191 | mci->pvt_info = pvt; | |
192 | mci->nr_csrows = nr_csrows; | |
193 | ||
194 | for (row = 0; row < nr_csrows; row++) { | |
195 | csrow = &csi[row]; | |
196 | csrow->csrow_idx = row; | |
197 | csrow->mci = mci; | |
198 | csrow->nr_channels = nr_chans; | |
199 | chp = &chi[row * nr_chans]; | |
200 | csrow->channels = chp; | |
201 | ||
202 | for (chn = 0; chn < nr_chans; chn++) { | |
203 | chan = &chp[chn]; | |
204 | chan->chan_idx = chn; | |
205 | chan->csrow = csrow; | |
206 | } | |
207 | } | |
208 | ||
81d87cb1 DJ |
209 | mci->op_state = OP_ALLOC; |
210 | ||
8096cfaf DT |
211 | /* |
212 | * Initialize the 'root' kobj for the edac_mc controller | |
213 | */ | |
214 | err = edac_mc_register_sysfs_main_kobj(mci); | |
215 | if (err) { | |
216 | kfree(mci); | |
217 | return NULL; | |
218 | } | |
219 | ||
220 | /* at this point, the root kobj is valid, and in order to | |
221 | * 'free' the object, then the function: | |
222 | * edac_mc_unregister_sysfs_main_kobj() must be called | |
223 | * which will perform kobj unregistration and the actual free | |
224 | * will occur during the kobject callback operation | |
225 | */ | |
da9bb1d2 AC |
226 | return mci; |
227 | } | |
9110540f | 228 | EXPORT_SYMBOL_GPL(edac_mc_alloc); |
da9bb1d2 | 229 | |
da9bb1d2 | 230 | /** |
8096cfaf DT |
231 | * edac_mc_free |
232 | * 'Free' a previously allocated 'mci' structure | |
da9bb1d2 | 233 | * @mci: pointer to a struct mem_ctl_info structure |
da9bb1d2 AC |
234 | */ |
235 | void edac_mc_free(struct mem_ctl_info *mci) | |
236 | { | |
8096cfaf | 237 | edac_mc_unregister_sysfs_main_kobj(mci); |
da9bb1d2 | 238 | } |
9110540f | 239 | EXPORT_SYMBOL_GPL(edac_mc_free); |
da9bb1d2 | 240 | |
bce19683 DT |
241 | |
242 | /* | |
243 | * find_mci_by_dev | |
244 | * | |
245 | * scan list of controllers looking for the one that manages | |
246 | * the 'dev' device | |
247 | */ | |
37f04581 | 248 | static struct mem_ctl_info *find_mci_by_dev(struct device *dev) |
da9bb1d2 AC |
249 | { |
250 | struct mem_ctl_info *mci; | |
251 | struct list_head *item; | |
252 | ||
537fba28 | 253 | debugf3("%s()\n", __func__); |
da9bb1d2 AC |
254 | |
255 | list_for_each(item, &mc_devices) { | |
256 | mci = list_entry(item, struct mem_ctl_info, link); | |
257 | ||
37f04581 | 258 | if (mci->dev == dev) |
da9bb1d2 AC |
259 | return mci; |
260 | } | |
261 | ||
262 | return NULL; | |
263 | } | |
264 | ||
81d87cb1 DJ |
265 | /* |
266 | * handler for EDAC to check if NMI type handler has asserted interrupt | |
267 | */ | |
268 | static int edac_mc_assert_error_check_and_clear(void) | |
269 | { | |
66ee2f94 | 270 | int old_state; |
81d87cb1 | 271 | |
079708b9 | 272 | if (edac_op_state == EDAC_OPSTATE_POLL) |
81d87cb1 DJ |
273 | return 1; |
274 | ||
66ee2f94 DJ |
275 | old_state = edac_err_assert; |
276 | edac_err_assert = 0; | |
81d87cb1 | 277 | |
66ee2f94 | 278 | return old_state; |
81d87cb1 DJ |
279 | } |
280 | ||
281 | /* | |
282 | * edac_mc_workq_function | |
283 | * performs the operation scheduled by a workq request | |
284 | */ | |
81d87cb1 DJ |
285 | static void edac_mc_workq_function(struct work_struct *work_req) |
286 | { | |
fbeb4384 | 287 | struct delayed_work *d_work = to_delayed_work(work_req); |
81d87cb1 | 288 | struct mem_ctl_info *mci = to_edac_mem_ctl_work(d_work); |
81d87cb1 DJ |
289 | |
290 | mutex_lock(&mem_ctls_mutex); | |
291 | ||
bf52fa4a DT |
292 | /* if this control struct has movd to offline state, we are done */ |
293 | if (mci->op_state == OP_OFFLINE) { | |
294 | mutex_unlock(&mem_ctls_mutex); | |
295 | return; | |
296 | } | |
297 | ||
81d87cb1 DJ |
298 | /* Only poll controllers that are running polled and have a check */ |
299 | if (edac_mc_assert_error_check_and_clear() && (mci->edac_check != NULL)) | |
300 | mci->edac_check(mci); | |
301 | ||
81d87cb1 DJ |
302 | mutex_unlock(&mem_ctls_mutex); |
303 | ||
304 | /* Reschedule */ | |
4de78c68 | 305 | queue_delayed_work(edac_workqueue, &mci->work, |
052dfb45 | 306 | msecs_to_jiffies(edac_mc_get_poll_msec())); |
81d87cb1 DJ |
307 | } |
308 | ||
309 | /* | |
310 | * edac_mc_workq_setup | |
311 | * initialize a workq item for this mci | |
312 | * passing in the new delay period in msec | |
bf52fa4a DT |
313 | * |
314 | * locking model: | |
315 | * | |
316 | * called with the mem_ctls_mutex held | |
81d87cb1 | 317 | */ |
bf52fa4a | 318 | static void edac_mc_workq_setup(struct mem_ctl_info *mci, unsigned msec) |
81d87cb1 DJ |
319 | { |
320 | debugf0("%s()\n", __func__); | |
321 | ||
bf52fa4a DT |
322 | /* if this instance is not in the POLL state, then simply return */ |
323 | if (mci->op_state != OP_RUNNING_POLL) | |
324 | return; | |
325 | ||
81d87cb1 | 326 | INIT_DELAYED_WORK(&mci->work, edac_mc_workq_function); |
81d87cb1 DJ |
327 | queue_delayed_work(edac_workqueue, &mci->work, msecs_to_jiffies(msec)); |
328 | } | |
329 | ||
330 | /* | |
331 | * edac_mc_workq_teardown | |
332 | * stop the workq processing on this mci | |
bf52fa4a DT |
333 | * |
334 | * locking model: | |
335 | * | |
336 | * called WITHOUT lock held | |
81d87cb1 | 337 | */ |
bf52fa4a | 338 | static void edac_mc_workq_teardown(struct mem_ctl_info *mci) |
81d87cb1 DJ |
339 | { |
340 | int status; | |
341 | ||
00740c58 BP |
342 | if (mci->op_state != OP_RUNNING_POLL) |
343 | return; | |
344 | ||
bce19683 DT |
345 | status = cancel_delayed_work(&mci->work); |
346 | if (status == 0) { | |
347 | debugf0("%s() not canceled, flush the queue\n", | |
348 | __func__); | |
bf52fa4a | 349 | |
bce19683 DT |
350 | /* workq instance might be running, wait for it */ |
351 | flush_workqueue(edac_workqueue); | |
81d87cb1 DJ |
352 | } |
353 | } | |
354 | ||
355 | /* | |
bce19683 DT |
356 | * edac_mc_reset_delay_period(unsigned long value) |
357 | * | |
358 | * user space has updated our poll period value, need to | |
359 | * reset our workq delays | |
81d87cb1 | 360 | */ |
bce19683 | 361 | void edac_mc_reset_delay_period(int value) |
81d87cb1 | 362 | { |
bce19683 DT |
363 | struct mem_ctl_info *mci; |
364 | struct list_head *item; | |
365 | ||
366 | mutex_lock(&mem_ctls_mutex); | |
367 | ||
368 | /* scan the list and turn off all workq timers, doing so under lock | |
369 | */ | |
370 | list_for_each(item, &mc_devices) { | |
371 | mci = list_entry(item, struct mem_ctl_info, link); | |
372 | ||
373 | if (mci->op_state == OP_RUNNING_POLL) | |
374 | cancel_delayed_work(&mci->work); | |
375 | } | |
376 | ||
377 | mutex_unlock(&mem_ctls_mutex); | |
81d87cb1 | 378 | |
bce19683 DT |
379 | |
380 | /* re-walk the list, and reset the poll delay */ | |
bf52fa4a DT |
381 | mutex_lock(&mem_ctls_mutex); |
382 | ||
bce19683 DT |
383 | list_for_each(item, &mc_devices) { |
384 | mci = list_entry(item, struct mem_ctl_info, link); | |
385 | ||
386 | edac_mc_workq_setup(mci, (unsigned long) value); | |
387 | } | |
81d87cb1 DJ |
388 | |
389 | mutex_unlock(&mem_ctls_mutex); | |
390 | } | |
391 | ||
bce19683 DT |
392 | |
393 | ||
2d7bbb91 DT |
394 | /* Return 0 on success, 1 on failure. |
395 | * Before calling this function, caller must | |
396 | * assign a unique value to mci->mc_idx. | |
bf52fa4a DT |
397 | * |
398 | * locking model: | |
399 | * | |
400 | * called with the mem_ctls_mutex lock held | |
2d7bbb91 | 401 | */ |
079708b9 | 402 | static int add_mc_to_global_list(struct mem_ctl_info *mci) |
da9bb1d2 AC |
403 | { |
404 | struct list_head *item, *insert_before; | |
405 | struct mem_ctl_info *p; | |
da9bb1d2 | 406 | |
2d7bbb91 | 407 | insert_before = &mc_devices; |
da9bb1d2 | 408 | |
bf52fa4a DT |
409 | p = find_mci_by_dev(mci->dev); |
410 | if (unlikely(p != NULL)) | |
2d7bbb91 | 411 | goto fail0; |
da9bb1d2 | 412 | |
2d7bbb91 DT |
413 | list_for_each(item, &mc_devices) { |
414 | p = list_entry(item, struct mem_ctl_info, link); | |
da9bb1d2 | 415 | |
2d7bbb91 DT |
416 | if (p->mc_idx >= mci->mc_idx) { |
417 | if (unlikely(p->mc_idx == mci->mc_idx)) | |
418 | goto fail1; | |
da9bb1d2 | 419 | |
2d7bbb91 DT |
420 | insert_before = item; |
421 | break; | |
da9bb1d2 | 422 | } |
da9bb1d2 AC |
423 | } |
424 | ||
425 | list_add_tail_rcu(&mci->link, insert_before); | |
c0d12172 | 426 | atomic_inc(&edac_handlers); |
da9bb1d2 | 427 | return 0; |
2d7bbb91 | 428 | |
052dfb45 | 429 | fail0: |
2d7bbb91 | 430 | edac_printk(KERN_WARNING, EDAC_MC, |
281efb17 | 431 | "%s (%s) %s %s already assigned %d\n", dev_name(p->dev), |
17aa7e03 | 432 | edac_dev_name(mci), p->mod_name, p->ctl_name, p->mc_idx); |
2d7bbb91 DT |
433 | return 1; |
434 | ||
052dfb45 | 435 | fail1: |
2d7bbb91 | 436 | edac_printk(KERN_WARNING, EDAC_MC, |
052dfb45 DT |
437 | "bug in low-level driver: attempt to assign\n" |
438 | " duplicate mc_idx %d in %s()\n", p->mc_idx, __func__); | |
2d7bbb91 | 439 | return 1; |
da9bb1d2 AC |
440 | } |
441 | ||
e7ecd891 | 442 | static void complete_mc_list_del(struct rcu_head *head) |
a1d03fcc DP |
443 | { |
444 | struct mem_ctl_info *mci; | |
445 | ||
446 | mci = container_of(head, struct mem_ctl_info, rcu); | |
447 | INIT_LIST_HEAD(&mci->link); | |
a1d03fcc DP |
448 | } |
449 | ||
e7ecd891 | 450 | static void del_mc_from_global_list(struct mem_ctl_info *mci) |
a1d03fcc | 451 | { |
c0d12172 | 452 | atomic_dec(&edac_handlers); |
a1d03fcc | 453 | list_del_rcu(&mci->link); |
a1d03fcc | 454 | call_rcu(&mci->rcu, complete_mc_list_del); |
458e5ff1 | 455 | rcu_barrier(); |
a1d03fcc DP |
456 | } |
457 | ||
5da0831c DT |
458 | /** |
459 | * edac_mc_find: Search for a mem_ctl_info structure whose index is 'idx'. | |
460 | * | |
461 | * If found, return a pointer to the structure. | |
462 | * Else return NULL. | |
463 | * | |
464 | * Caller must hold mem_ctls_mutex. | |
465 | */ | |
079708b9 | 466 | struct mem_ctl_info *edac_mc_find(int idx) |
5da0831c DT |
467 | { |
468 | struct list_head *item; | |
469 | struct mem_ctl_info *mci; | |
470 | ||
471 | list_for_each(item, &mc_devices) { | |
472 | mci = list_entry(item, struct mem_ctl_info, link); | |
473 | ||
474 | if (mci->mc_idx >= idx) { | |
475 | if (mci->mc_idx == idx) | |
476 | return mci; | |
477 | ||
478 | break; | |
479 | } | |
480 | } | |
481 | ||
482 | return NULL; | |
483 | } | |
484 | EXPORT_SYMBOL(edac_mc_find); | |
485 | ||
da9bb1d2 | 486 | /** |
472678eb DP |
487 | * edac_mc_add_mc: Insert the 'mci' structure into the mci global list and |
488 | * create sysfs entries associated with mci structure | |
da9bb1d2 | 489 | * @mci: pointer to the mci structure to be added to the list |
2d7bbb91 | 490 | * @mc_idx: A unique numeric identifier to be assigned to the 'mci' structure. |
da9bb1d2 AC |
491 | * |
492 | * Return: | |
493 | * 0 Success | |
494 | * !0 Failure | |
495 | */ | |
496 | ||
497 | /* FIXME - should a warning be printed if no error detection? correction? */ | |
b8f6f975 | 498 | int edac_mc_add_mc(struct mem_ctl_info *mci) |
da9bb1d2 | 499 | { |
537fba28 | 500 | debugf0("%s()\n", __func__); |
b8f6f975 | 501 | |
da9bb1d2 AC |
502 | #ifdef CONFIG_EDAC_DEBUG |
503 | if (edac_debug_level >= 3) | |
504 | edac_mc_dump_mci(mci); | |
e7ecd891 | 505 | |
da9bb1d2 AC |
506 | if (edac_debug_level >= 4) { |
507 | int i; | |
508 | ||
509 | for (i = 0; i < mci->nr_csrows; i++) { | |
510 | int j; | |
e7ecd891 | 511 | |
da9bb1d2 AC |
512 | edac_mc_dump_csrow(&mci->csrows[i]); |
513 | for (j = 0; j < mci->csrows[i].nr_channels; j++) | |
079708b9 | 514 | edac_mc_dump_channel(&mci->csrows[i]. |
052dfb45 | 515 | channels[j]); |
da9bb1d2 AC |
516 | } |
517 | } | |
518 | #endif | |
63b7df91 | 519 | mutex_lock(&mem_ctls_mutex); |
da9bb1d2 AC |
520 | |
521 | if (add_mc_to_global_list(mci)) | |
028a7b6d | 522 | goto fail0; |
da9bb1d2 AC |
523 | |
524 | /* set load time so that error rate can be tracked */ | |
525 | mci->start_time = jiffies; | |
526 | ||
9794f33d | 527 | if (edac_create_sysfs_mci_device(mci)) { |
528 | edac_mc_printk(mci, KERN_WARNING, | |
052dfb45 | 529 | "failed to create sysfs device\n"); |
9794f33d | 530 | goto fail1; |
531 | } | |
da9bb1d2 | 532 | |
81d87cb1 DJ |
533 | /* If there IS a check routine, then we are running POLLED */ |
534 | if (mci->edac_check != NULL) { | |
535 | /* This instance is NOW RUNNING */ | |
536 | mci->op_state = OP_RUNNING_POLL; | |
537 | ||
538 | edac_mc_workq_setup(mci, edac_mc_get_poll_msec()); | |
539 | } else { | |
540 | mci->op_state = OP_RUNNING_INTERRUPT; | |
541 | } | |
542 | ||
da9bb1d2 | 543 | /* Report action taken */ |
bf52fa4a | 544 | edac_mc_printk(mci, KERN_INFO, "Giving out device to '%s' '%s':" |
17aa7e03 | 545 | " DEV %s\n", mci->mod_name, mci->ctl_name, edac_dev_name(mci)); |
da9bb1d2 | 546 | |
63b7df91 | 547 | mutex_unlock(&mem_ctls_mutex); |
028a7b6d | 548 | return 0; |
da9bb1d2 | 549 | |
052dfb45 | 550 | fail1: |
028a7b6d DP |
551 | del_mc_from_global_list(mci); |
552 | ||
052dfb45 | 553 | fail0: |
63b7df91 | 554 | mutex_unlock(&mem_ctls_mutex); |
028a7b6d | 555 | return 1; |
da9bb1d2 | 556 | } |
9110540f | 557 | EXPORT_SYMBOL_GPL(edac_mc_add_mc); |
da9bb1d2 | 558 | |
da9bb1d2 | 559 | /** |
472678eb DP |
560 | * edac_mc_del_mc: Remove sysfs entries for specified mci structure and |
561 | * remove mci structure from global list | |
37f04581 | 562 | * @pdev: Pointer to 'struct device' representing mci structure to remove. |
da9bb1d2 | 563 | * |
18dbc337 | 564 | * Return pointer to removed mci structure, or NULL if device not found. |
da9bb1d2 | 565 | */ |
079708b9 | 566 | struct mem_ctl_info *edac_mc_del_mc(struct device *dev) |
da9bb1d2 | 567 | { |
18dbc337 | 568 | struct mem_ctl_info *mci; |
da9bb1d2 | 569 | |
bf52fa4a DT |
570 | debugf0("%s()\n", __func__); |
571 | ||
63b7df91 | 572 | mutex_lock(&mem_ctls_mutex); |
18dbc337 | 573 | |
bf52fa4a DT |
574 | /* find the requested mci struct in the global list */ |
575 | mci = find_mci_by_dev(dev); | |
576 | if (mci == NULL) { | |
63b7df91 | 577 | mutex_unlock(&mem_ctls_mutex); |
18dbc337 DP |
578 | return NULL; |
579 | } | |
580 | ||
81d87cb1 DJ |
581 | /* marking MCI offline */ |
582 | mci->op_state = OP_OFFLINE; | |
583 | ||
da9bb1d2 | 584 | del_mc_from_global_list(mci); |
63b7df91 | 585 | mutex_unlock(&mem_ctls_mutex); |
bf52fa4a DT |
586 | |
587 | /* flush workq processes and remove sysfs */ | |
588 | edac_mc_workq_teardown(mci); | |
589 | edac_remove_sysfs_mci_device(mci); | |
590 | ||
537fba28 | 591 | edac_printk(KERN_INFO, EDAC_MC, |
052dfb45 | 592 | "Removed device %d for %s %s: DEV %s\n", mci->mc_idx, |
17aa7e03 | 593 | mci->mod_name, mci->ctl_name, edac_dev_name(mci)); |
bf52fa4a | 594 | |
18dbc337 | 595 | return mci; |
da9bb1d2 | 596 | } |
9110540f | 597 | EXPORT_SYMBOL_GPL(edac_mc_del_mc); |
da9bb1d2 | 598 | |
2da1c119 AB |
599 | static void edac_mc_scrub_block(unsigned long page, unsigned long offset, |
600 | u32 size) | |
da9bb1d2 AC |
601 | { |
602 | struct page *pg; | |
603 | void *virt_addr; | |
604 | unsigned long flags = 0; | |
605 | ||
537fba28 | 606 | debugf3("%s()\n", __func__); |
da9bb1d2 AC |
607 | |
608 | /* ECC error page was not in our memory. Ignore it. */ | |
079708b9 | 609 | if (!pfn_valid(page)) |
da9bb1d2 AC |
610 | return; |
611 | ||
612 | /* Find the actual page structure then map it and fix */ | |
613 | pg = pfn_to_page(page); | |
614 | ||
615 | if (PageHighMem(pg)) | |
616 | local_irq_save(flags); | |
617 | ||
618 | virt_addr = kmap_atomic(pg, KM_BOUNCE_READ); | |
619 | ||
620 | /* Perform architecture specific atomic scrub operation */ | |
621 | atomic_scrub(virt_addr + offset, size); | |
622 | ||
623 | /* Unmap and complete */ | |
624 | kunmap_atomic(virt_addr, KM_BOUNCE_READ); | |
625 | ||
626 | if (PageHighMem(pg)) | |
627 | local_irq_restore(flags); | |
628 | } | |
629 | ||
da9bb1d2 | 630 | /* FIXME - should return -1 */ |
e7ecd891 | 631 | int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, unsigned long page) |
da9bb1d2 AC |
632 | { |
633 | struct csrow_info *csrows = mci->csrows; | |
634 | int row, i; | |
635 | ||
537fba28 | 636 | debugf1("MC%d: %s(): 0x%lx\n", mci->mc_idx, __func__, page); |
da9bb1d2 AC |
637 | row = -1; |
638 | ||
639 | for (i = 0; i < mci->nr_csrows; i++) { | |
640 | struct csrow_info *csrow = &csrows[i]; | |
641 | ||
642 | if (csrow->nr_pages == 0) | |
643 | continue; | |
644 | ||
537fba28 DP |
645 | debugf3("MC%d: %s(): first(0x%lx) page(0x%lx) last(0x%lx) " |
646 | "mask(0x%lx)\n", mci->mc_idx, __func__, | |
647 | csrow->first_page, page, csrow->last_page, | |
648 | csrow->page_mask); | |
da9bb1d2 AC |
649 | |
650 | if ((page >= csrow->first_page) && | |
651 | (page <= csrow->last_page) && | |
652 | ((page & csrow->page_mask) == | |
653 | (csrow->first_page & csrow->page_mask))) { | |
654 | row = i; | |
655 | break; | |
656 | } | |
657 | } | |
658 | ||
659 | if (row == -1) | |
537fba28 | 660 | edac_mc_printk(mci, KERN_ERR, |
052dfb45 DT |
661 | "could not look up page error address %lx\n", |
662 | (unsigned long)page); | |
da9bb1d2 AC |
663 | |
664 | return row; | |
665 | } | |
9110540f | 666 | EXPORT_SYMBOL_GPL(edac_mc_find_csrow_by_page); |
da9bb1d2 | 667 | |
da9bb1d2 AC |
668 | /* FIXME - setable log (warning/emerg) levels */ |
669 | /* FIXME - integrate with evlog: http://evlog.sourceforge.net/ */ | |
670 | void edac_mc_handle_ce(struct mem_ctl_info *mci, | |
052dfb45 DT |
671 | unsigned long page_frame_number, |
672 | unsigned long offset_in_page, unsigned long syndrome, | |
673 | int row, int channel, const char *msg) | |
da9bb1d2 AC |
674 | { |
675 | unsigned long remapped_page; | |
676 | ||
537fba28 | 677 | debugf3("MC%d: %s()\n", mci->mc_idx, __func__); |
da9bb1d2 AC |
678 | |
679 | /* FIXME - maybe make panic on INTERNAL ERROR an option */ | |
680 | if (row >= mci->nr_csrows || row < 0) { | |
681 | /* something is wrong */ | |
537fba28 | 682 | edac_mc_printk(mci, KERN_ERR, |
052dfb45 DT |
683 | "INTERNAL ERROR: row out of range " |
684 | "(%d >= %d)\n", row, mci->nr_csrows); | |
da9bb1d2 AC |
685 | edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); |
686 | return; | |
687 | } | |
e7ecd891 | 688 | |
da9bb1d2 AC |
689 | if (channel >= mci->csrows[row].nr_channels || channel < 0) { |
690 | /* something is wrong */ | |
537fba28 | 691 | edac_mc_printk(mci, KERN_ERR, |
052dfb45 DT |
692 | "INTERNAL ERROR: channel out of range " |
693 | "(%d >= %d)\n", channel, | |
694 | mci->csrows[row].nr_channels); | |
da9bb1d2 AC |
695 | edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); |
696 | return; | |
697 | } | |
698 | ||
4de78c68 | 699 | if (edac_mc_get_log_ce()) |
da9bb1d2 | 700 | /* FIXME - put in DIMM location */ |
537fba28 | 701 | edac_mc_printk(mci, KERN_WARNING, |
052dfb45 DT |
702 | "CE page 0x%lx, offset 0x%lx, grain %d, syndrome " |
703 | "0x%lx, row %d, channel %d, label \"%s\": %s\n", | |
704 | page_frame_number, offset_in_page, | |
705 | mci->csrows[row].grain, syndrome, row, channel, | |
706 | mci->csrows[row].channels[channel].label, msg); | |
da9bb1d2 AC |
707 | |
708 | mci->ce_count++; | |
709 | mci->csrows[row].ce_count++; | |
710 | mci->csrows[row].channels[channel].ce_count++; | |
711 | ||
712 | if (mci->scrub_mode & SCRUB_SW_SRC) { | |
713 | /* | |
714 | * Some MC's can remap memory so that it is still available | |
715 | * at a different address when PCI devices map into memory. | |
716 | * MC's that can't do this lose the memory where PCI devices | |
717 | * are mapped. This mapping is MC dependant and so we call | |
718 | * back into the MC driver for it to map the MC page to | |
719 | * a physical (CPU) page which can then be mapped to a virtual | |
720 | * page - which can then be scrubbed. | |
721 | */ | |
722 | remapped_page = mci->ctl_page_to_phys ? | |
052dfb45 DT |
723 | mci->ctl_page_to_phys(mci, page_frame_number) : |
724 | page_frame_number; | |
da9bb1d2 AC |
725 | |
726 | edac_mc_scrub_block(remapped_page, offset_in_page, | |
052dfb45 | 727 | mci->csrows[row].grain); |
da9bb1d2 AC |
728 | } |
729 | } | |
9110540f | 730 | EXPORT_SYMBOL_GPL(edac_mc_handle_ce); |
da9bb1d2 | 731 | |
e7ecd891 | 732 | void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, const char *msg) |
da9bb1d2 | 733 | { |
4de78c68 | 734 | if (edac_mc_get_log_ce()) |
537fba28 | 735 | edac_mc_printk(mci, KERN_WARNING, |
052dfb45 | 736 | "CE - no information available: %s\n", msg); |
e7ecd891 | 737 | |
da9bb1d2 AC |
738 | mci->ce_noinfo_count++; |
739 | mci->ce_count++; | |
740 | } | |
9110540f | 741 | EXPORT_SYMBOL_GPL(edac_mc_handle_ce_no_info); |
da9bb1d2 | 742 | |
da9bb1d2 | 743 | void edac_mc_handle_ue(struct mem_ctl_info *mci, |
052dfb45 DT |
744 | unsigned long page_frame_number, |
745 | unsigned long offset_in_page, int row, const char *msg) | |
da9bb1d2 AC |
746 | { |
747 | int len = EDAC_MC_LABEL_LEN * 4; | |
748 | char labels[len + 1]; | |
749 | char *pos = labels; | |
750 | int chan; | |
751 | int chars; | |
752 | ||
537fba28 | 753 | debugf3("MC%d: %s()\n", mci->mc_idx, __func__); |
da9bb1d2 AC |
754 | |
755 | /* FIXME - maybe make panic on INTERNAL ERROR an option */ | |
756 | if (row >= mci->nr_csrows || row < 0) { | |
757 | /* something is wrong */ | |
537fba28 | 758 | edac_mc_printk(mci, KERN_ERR, |
052dfb45 DT |
759 | "INTERNAL ERROR: row out of range " |
760 | "(%d >= %d)\n", row, mci->nr_csrows); | |
da9bb1d2 AC |
761 | edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); |
762 | return; | |
763 | } | |
764 | ||
765 | chars = snprintf(pos, len + 1, "%s", | |
079708b9 | 766 | mci->csrows[row].channels[0].label); |
da9bb1d2 AC |
767 | len -= chars; |
768 | pos += chars; | |
e7ecd891 | 769 | |
da9bb1d2 | 770 | for (chan = 1; (chan < mci->csrows[row].nr_channels) && (len > 0); |
052dfb45 | 771 | chan++) { |
da9bb1d2 | 772 | chars = snprintf(pos, len + 1, ":%s", |
079708b9 | 773 | mci->csrows[row].channels[chan].label); |
da9bb1d2 AC |
774 | len -= chars; |
775 | pos += chars; | |
776 | } | |
777 | ||
4de78c68 | 778 | if (edac_mc_get_log_ue()) |
537fba28 | 779 | edac_mc_printk(mci, KERN_EMERG, |
052dfb45 DT |
780 | "UE page 0x%lx, offset 0x%lx, grain %d, row %d, " |
781 | "labels \"%s\": %s\n", page_frame_number, | |
782 | offset_in_page, mci->csrows[row].grain, row, | |
783 | labels, msg); | |
da9bb1d2 | 784 | |
4de78c68 | 785 | if (edac_mc_get_panic_on_ue()) |
e7ecd891 | 786 | panic("EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, " |
052dfb45 DT |
787 | "row %d, labels \"%s\": %s\n", mci->mc_idx, |
788 | page_frame_number, offset_in_page, | |
789 | mci->csrows[row].grain, row, labels, msg); | |
da9bb1d2 AC |
790 | |
791 | mci->ue_count++; | |
792 | mci->csrows[row].ue_count++; | |
793 | } | |
9110540f | 794 | EXPORT_SYMBOL_GPL(edac_mc_handle_ue); |
da9bb1d2 | 795 | |
e7ecd891 | 796 | void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, const char *msg) |
da9bb1d2 | 797 | { |
4de78c68 | 798 | if (edac_mc_get_panic_on_ue()) |
da9bb1d2 AC |
799 | panic("EDAC MC%d: Uncorrected Error", mci->mc_idx); |
800 | ||
4de78c68 | 801 | if (edac_mc_get_log_ue()) |
537fba28 | 802 | edac_mc_printk(mci, KERN_WARNING, |
052dfb45 | 803 | "UE - no information available: %s\n", msg); |
da9bb1d2 AC |
804 | mci->ue_noinfo_count++; |
805 | mci->ue_count++; | |
806 | } | |
079708b9 | 807 | EXPORT_SYMBOL_GPL(edac_mc_handle_ue_no_info); |
da9bb1d2 | 808 | |
9794f33d | 809 | /************************************************************* |
810 | * On Fully Buffered DIMM modules, this help function is | |
811 | * called to process UE events | |
812 | */ | |
813 | void edac_mc_handle_fbd_ue(struct mem_ctl_info *mci, | |
052dfb45 DT |
814 | unsigned int csrow, |
815 | unsigned int channela, | |
816 | unsigned int channelb, char *msg) | |
9794f33d | 817 | { |
818 | int len = EDAC_MC_LABEL_LEN * 4; | |
819 | char labels[len + 1]; | |
820 | char *pos = labels; | |
821 | int chars; | |
822 | ||
823 | if (csrow >= mci->nr_csrows) { | |
824 | /* something is wrong */ | |
825 | edac_mc_printk(mci, KERN_ERR, | |
052dfb45 DT |
826 | "INTERNAL ERROR: row out of range (%d >= %d)\n", |
827 | csrow, mci->nr_csrows); | |
9794f33d | 828 | edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); |
829 | return; | |
830 | } | |
831 | ||
832 | if (channela >= mci->csrows[csrow].nr_channels) { | |
833 | /* something is wrong */ | |
834 | edac_mc_printk(mci, KERN_ERR, | |
052dfb45 DT |
835 | "INTERNAL ERROR: channel-a out of range " |
836 | "(%d >= %d)\n", | |
837 | channela, mci->csrows[csrow].nr_channels); | |
9794f33d | 838 | edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); |
839 | return; | |
840 | } | |
841 | ||
842 | if (channelb >= mci->csrows[csrow].nr_channels) { | |
843 | /* something is wrong */ | |
844 | edac_mc_printk(mci, KERN_ERR, | |
052dfb45 DT |
845 | "INTERNAL ERROR: channel-b out of range " |
846 | "(%d >= %d)\n", | |
847 | channelb, mci->csrows[csrow].nr_channels); | |
9794f33d | 848 | edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); |
849 | return; | |
850 | } | |
851 | ||
852 | mci->ue_count++; | |
853 | mci->csrows[csrow].ue_count++; | |
854 | ||
855 | /* Generate the DIMM labels from the specified channels */ | |
856 | chars = snprintf(pos, len + 1, "%s", | |
857 | mci->csrows[csrow].channels[channela].label); | |
079708b9 DT |
858 | len -= chars; |
859 | pos += chars; | |
9794f33d | 860 | chars = snprintf(pos, len + 1, "-%s", |
861 | mci->csrows[csrow].channels[channelb].label); | |
862 | ||
4de78c68 | 863 | if (edac_mc_get_log_ue()) |
9794f33d | 864 | edac_mc_printk(mci, KERN_EMERG, |
052dfb45 DT |
865 | "UE row %d, channel-a= %d channel-b= %d " |
866 | "labels \"%s\": %s\n", csrow, channela, channelb, | |
867 | labels, msg); | |
9794f33d | 868 | |
4de78c68 | 869 | if (edac_mc_get_panic_on_ue()) |
9794f33d | 870 | panic("UE row %d, channel-a= %d channel-b= %d " |
052dfb45 DT |
871 | "labels \"%s\": %s\n", csrow, channela, |
872 | channelb, labels, msg); | |
9794f33d | 873 | } |
874 | EXPORT_SYMBOL(edac_mc_handle_fbd_ue); | |
875 | ||
876 | /************************************************************* | |
877 | * On Fully Buffered DIMM modules, this help function is | |
878 | * called to process CE events | |
879 | */ | |
880 | void edac_mc_handle_fbd_ce(struct mem_ctl_info *mci, | |
052dfb45 | 881 | unsigned int csrow, unsigned int channel, char *msg) |
9794f33d | 882 | { |
883 | ||
884 | /* Ensure boundary values */ | |
885 | if (csrow >= mci->nr_csrows) { | |
886 | /* something is wrong */ | |
887 | edac_mc_printk(mci, KERN_ERR, | |
052dfb45 DT |
888 | "INTERNAL ERROR: row out of range (%d >= %d)\n", |
889 | csrow, mci->nr_csrows); | |
9794f33d | 890 | edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); |
891 | return; | |
892 | } | |
893 | if (channel >= mci->csrows[csrow].nr_channels) { | |
894 | /* something is wrong */ | |
895 | edac_mc_printk(mci, KERN_ERR, | |
052dfb45 DT |
896 | "INTERNAL ERROR: channel out of range (%d >= %d)\n", |
897 | channel, mci->csrows[csrow].nr_channels); | |
9794f33d | 898 | edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); |
899 | return; | |
900 | } | |
901 | ||
4de78c68 | 902 | if (edac_mc_get_log_ce()) |
9794f33d | 903 | /* FIXME - put in DIMM location */ |
904 | edac_mc_printk(mci, KERN_WARNING, | |
052dfb45 DT |
905 | "CE row %d, channel %d, label \"%s\": %s\n", |
906 | csrow, channel, | |
907 | mci->csrows[csrow].channels[channel].label, msg); | |
9794f33d | 908 | |
909 | mci->ce_count++; | |
910 | mci->csrows[csrow].ce_count++; | |
911 | mci->csrows[csrow].channels[channel].ce_count++; | |
912 | } | |
079708b9 | 913 | EXPORT_SYMBOL(edac_mc_handle_fbd_ce); |