Commit | Line | Data |
---|---|---|
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> | |
f2fe42ab | 30 | #include <linux/kthread.h> |
7dfb7103 | 31 | #include <linux/freezer.h> |
da9bb1d2 AC |
32 | #include <asm/uaccess.h> |
33 | #include <asm/page.h> | |
34 | #include <asm/edac.h> | |
da9bb1d2 AC |
35 | #include "edac_mc.h" |
36 | ||
49c0dab7 | 37 | #define EDAC_MC_VERSION "Ver: 2.0.1 " __DATE__ |
da9bb1d2 | 38 | |
ceb2ca9c | 39 | |
da9bb1d2 AC |
40 | #ifdef CONFIG_EDAC_DEBUG |
41 | /* Values of 0 to 4 will generate output */ | |
42 | int edac_debug_level = 1; | |
9110540f | 43 | EXPORT_SYMBOL_GPL(edac_debug_level); |
da9bb1d2 AC |
44 | #endif |
45 | ||
46 | /* EDAC Controls, setable by module parameter, and sysfs */ | |
47 | static int log_ue = 1; | |
48 | static int log_ce = 1; | |
ceb2ca9c | 49 | static int panic_on_ue; |
da9bb1d2 AC |
50 | static int poll_msec = 1000; |
51 | ||
da9bb1d2 AC |
52 | /* lock to memory controller's control array */ |
53 | static DECLARE_MUTEX(mem_ctls_mutex); | |
54 | static struct list_head mc_devices = LIST_HEAD_INIT(mc_devices); | |
55 | ||
f2fe42ab DP |
56 | static struct task_struct *edac_thread; |
57 | ||
37f04581 DT |
58 | #ifdef CONFIG_PCI |
59 | static int check_pci_parity = 0; /* default YES check PCI parity */ | |
60 | static int panic_on_pci_parity; /* default no panic on PCI Parity */ | |
61 | static atomic_t pci_parity_count = ATOMIC_INIT(0); | |
62 | ||
37f04581 DT |
63 | static struct kobject edac_pci_kobj; /* /sys/devices/system/edac/pci */ |
64 | static struct completion edac_pci_kobj_complete; | |
37f04581 DT |
65 | #endif /* CONFIG_PCI */ |
66 | ||
da9bb1d2 AC |
67 | /* START sysfs data and methods */ |
68 | ||
ceb2ca9c | 69 | |
da9bb1d2 AC |
70 | static const char *mem_types[] = { |
71 | [MEM_EMPTY] = "Empty", | |
72 | [MEM_RESERVED] = "Reserved", | |
73 | [MEM_UNKNOWN] = "Unknown", | |
74 | [MEM_FPM] = "FPM", | |
75 | [MEM_EDO] = "EDO", | |
76 | [MEM_BEDO] = "BEDO", | |
77 | [MEM_SDR] = "Unbuffered-SDR", | |
78 | [MEM_RDR] = "Registered-SDR", | |
79 | [MEM_DDR] = "Unbuffered-DDR", | |
80 | [MEM_RDDR] = "Registered-DDR", | |
81 | [MEM_RMBS] = "RMBS" | |
82 | }; | |
83 | ||
84 | static const char *dev_types[] = { | |
85 | [DEV_UNKNOWN] = "Unknown", | |
86 | [DEV_X1] = "x1", | |
87 | [DEV_X2] = "x2", | |
88 | [DEV_X4] = "x4", | |
89 | [DEV_X8] = "x8", | |
90 | [DEV_X16] = "x16", | |
91 | [DEV_X32] = "x32", | |
92 | [DEV_X64] = "x64" | |
93 | }; | |
94 | ||
95 | static const char *edac_caps[] = { | |
96 | [EDAC_UNKNOWN] = "Unknown", | |
97 | [EDAC_NONE] = "None", | |
98 | [EDAC_RESERVED] = "Reserved", | |
99 | [EDAC_PARITY] = "PARITY", | |
100 | [EDAC_EC] = "EC", | |
101 | [EDAC_SECDED] = "SECDED", | |
102 | [EDAC_S2ECD2ED] = "S2ECD2ED", | |
103 | [EDAC_S4ECD4ED] = "S4ECD4ED", | |
104 | [EDAC_S8ECD8ED] = "S8ECD8ED", | |
105 | [EDAC_S16ECD16ED] = "S16ECD16ED" | |
106 | }; | |
107 | ||
da9bb1d2 AC |
108 | /* sysfs object: /sys/devices/system/edac */ |
109 | static struct sysdev_class edac_class = { | |
110 | set_kset_name("edac"), | |
111 | }; | |
112 | ||
37f04581 | 113 | /* sysfs object: |
da9bb1d2 | 114 | * /sys/devices/system/edac/mc |
da9bb1d2 AC |
115 | */ |
116 | static struct kobject edac_memctrl_kobj; | |
da9bb1d2 | 117 | |
472678eb DP |
118 | /* We use these to wait for the reference counts on edac_memctrl_kobj and |
119 | * edac_pci_kobj to reach 0. | |
120 | */ | |
121 | static struct completion edac_memctrl_kobj_complete; | |
472678eb | 122 | |
da9bb1d2 AC |
123 | /* |
124 | * /sys/devices/system/edac/mc; | |
e7ecd891 | 125 | * data structures and methods |
da9bb1d2 | 126 | */ |
da9bb1d2 AC |
127 | static ssize_t memctrl_int_show(void *ptr, char *buffer) |
128 | { | |
129 | int *value = (int*) ptr; | |
49c0dab7 | 130 | return sprintf(buffer, "%u\n", *value); |
da9bb1d2 AC |
131 | } |
132 | ||
133 | static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count) | |
134 | { | |
135 | int *value = (int*) ptr; | |
136 | ||
137 | if (isdigit(*buffer)) | |
138 | *value = simple_strtoul(buffer, NULL, 0); | |
139 | ||
140 | return count; | |
141 | } | |
142 | ||
143 | struct memctrl_dev_attribute { | |
e7ecd891 DP |
144 | struct attribute attr; |
145 | void *value; | |
da9bb1d2 AC |
146 | ssize_t (*show)(void *,char *); |
147 | ssize_t (*store)(void *, const char *, size_t); | |
148 | }; | |
149 | ||
150 | /* Set of show/store abstract level functions for memory control object */ | |
e7ecd891 DP |
151 | static ssize_t memctrl_dev_show(struct kobject *kobj, |
152 | struct attribute *attr, char *buffer) | |
da9bb1d2 AC |
153 | { |
154 | struct memctrl_dev_attribute *memctrl_dev; | |
155 | memctrl_dev = (struct memctrl_dev_attribute*)attr; | |
156 | ||
157 | if (memctrl_dev->show) | |
158 | return memctrl_dev->show(memctrl_dev->value, buffer); | |
e7ecd891 | 159 | |
da9bb1d2 AC |
160 | return -EIO; |
161 | } | |
162 | ||
e7ecd891 DP |
163 | static ssize_t memctrl_dev_store(struct kobject *kobj, struct attribute *attr, |
164 | const char *buffer, size_t count) | |
da9bb1d2 AC |
165 | { |
166 | struct memctrl_dev_attribute *memctrl_dev; | |
167 | memctrl_dev = (struct memctrl_dev_attribute*)attr; | |
168 | ||
169 | if (memctrl_dev->store) | |
170 | return memctrl_dev->store(memctrl_dev->value, buffer, count); | |
e7ecd891 | 171 | |
da9bb1d2 AC |
172 | return -EIO; |
173 | } | |
174 | ||
175 | static struct sysfs_ops memctrlfs_ops = { | |
176 | .show = memctrl_dev_show, | |
177 | .store = memctrl_dev_store | |
178 | }; | |
179 | ||
180 | #define MEMCTRL_ATTR(_name,_mode,_show,_store) \ | |
181 | struct memctrl_dev_attribute attr_##_name = { \ | |
182 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
183 | .value = &_name, \ | |
184 | .show = _show, \ | |
185 | .store = _store, \ | |
186 | }; | |
187 | ||
188 | #define MEMCTRL_STRING_ATTR(_name,_data,_mode,_show,_store) \ | |
189 | struct memctrl_dev_attribute attr_##_name = { \ | |
190 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
191 | .value = _data, \ | |
192 | .show = _show, \ | |
193 | .store = _store, \ | |
194 | }; | |
195 | ||
da9bb1d2 AC |
196 | /* csrow<id> control files */ |
197 | MEMCTRL_ATTR(panic_on_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); | |
198 | MEMCTRL_ATTR(log_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); | |
199 | MEMCTRL_ATTR(log_ce,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); | |
200 | MEMCTRL_ATTR(poll_msec,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store); | |
201 | ||
da9bb1d2 AC |
202 | /* Base Attributes of the memory ECC object */ |
203 | static struct memctrl_dev_attribute *memctrl_attr[] = { | |
204 | &attr_panic_on_ue, | |
205 | &attr_log_ue, | |
206 | &attr_log_ce, | |
207 | &attr_poll_msec, | |
da9bb1d2 AC |
208 | NULL, |
209 | }; | |
210 | ||
211 | /* Main MC kobject release() function */ | |
212 | static void edac_memctrl_master_release(struct kobject *kobj) | |
213 | { | |
537fba28 | 214 | debugf1("%s()\n", __func__); |
472678eb | 215 | complete(&edac_memctrl_kobj_complete); |
da9bb1d2 AC |
216 | } |
217 | ||
218 | static struct kobj_type ktype_memctrl = { | |
e7ecd891 DP |
219 | .release = edac_memctrl_master_release, |
220 | .sysfs_ops = &memctrlfs_ops, | |
221 | .default_attrs = (struct attribute **) memctrl_attr, | |
da9bb1d2 AC |
222 | }; |
223 | ||
da9bb1d2 AC |
224 | /* Initialize the main sysfs entries for edac: |
225 | * /sys/devices/system/edac | |
226 | * | |
227 | * and children | |
228 | * | |
229 | * Return: 0 SUCCESS | |
230 | * !0 FAILURE | |
231 | */ | |
232 | static int edac_sysfs_memctrl_setup(void) | |
233 | { | |
77d6e139 | 234 | int err = 0; |
da9bb1d2 | 235 | |
537fba28 | 236 | debugf1("%s()\n", __func__); |
da9bb1d2 AC |
237 | |
238 | /* create the /sys/devices/system/edac directory */ | |
239 | err = sysdev_class_register(&edac_class); | |
e7ecd891 | 240 | |
77d6e139 | 241 | if (err) { |
537fba28 | 242 | debugf1("%s() error=%d\n", __func__, err); |
77d6e139 AM |
243 | return err; |
244 | } | |
da9bb1d2 | 245 | |
77d6e139 AM |
246 | /* Init the MC's kobject */ |
247 | memset(&edac_memctrl_kobj, 0, sizeof (edac_memctrl_kobj)); | |
248 | edac_memctrl_kobj.parent = &edac_class.kset.kobj; | |
249 | edac_memctrl_kobj.ktype = &ktype_memctrl; | |
250 | ||
251 | /* generate sysfs "..../edac/mc" */ | |
252 | err = kobject_set_name(&edac_memctrl_kobj,"mc"); | |
253 | ||
254 | if (err) | |
255 | goto fail; | |
256 | ||
257 | /* FIXME: maybe new sysdev_create_subdir() */ | |
258 | err = kobject_register(&edac_memctrl_kobj); | |
259 | ||
260 | if (err) { | |
261 | debugf1("Failed to register '.../edac/mc'\n"); | |
262 | goto fail; | |
263 | } | |
264 | ||
265 | debugf1("Registered '.../edac/mc' kobject\n"); | |
266 | ||
267 | return 0; | |
268 | ||
269 | fail: | |
270 | sysdev_class_unregister(&edac_class); | |
da9bb1d2 AC |
271 | return err; |
272 | } | |
273 | ||
274 | /* | |
275 | * MC teardown: | |
276 | * the '..../edac/mc' kobject followed by '..../edac' itself | |
277 | */ | |
278 | static void edac_sysfs_memctrl_teardown(void) | |
279 | { | |
280 | debugf0("MC: " __FILE__ ": %s()\n", __func__); | |
281 | ||
472678eb DP |
282 | /* Unregister the MC's kobject and wait for reference count to reach |
283 | * 0. | |
284 | */ | |
285 | init_completion(&edac_memctrl_kobj_complete); | |
da9bb1d2 | 286 | kobject_unregister(&edac_memctrl_kobj); |
472678eb | 287 | wait_for_completion(&edac_memctrl_kobj_complete); |
da9bb1d2 | 288 | |
da9bb1d2 AC |
289 | /* Unregister the 'edac' object */ |
290 | sysdev_class_unregister(&edac_class); | |
291 | } | |
292 | ||
37f04581 | 293 | #ifdef CONFIG_PCI |
da9bb1d2 AC |
294 | static ssize_t edac_pci_int_show(void *ptr, char *buffer) |
295 | { | |
296 | int *value = ptr; | |
297 | return sprintf(buffer,"%d\n",*value); | |
298 | } | |
299 | ||
300 | static ssize_t edac_pci_int_store(void *ptr, const char *buffer, size_t count) | |
301 | { | |
302 | int *value = ptr; | |
303 | ||
304 | if (isdigit(*buffer)) | |
305 | *value = simple_strtoul(buffer,NULL,0); | |
306 | ||
307 | return count; | |
308 | } | |
309 | ||
310 | struct edac_pci_dev_attribute { | |
e7ecd891 DP |
311 | struct attribute attr; |
312 | void *value; | |
da9bb1d2 AC |
313 | ssize_t (*show)(void *,char *); |
314 | ssize_t (*store)(void *, const char *,size_t); | |
315 | }; | |
316 | ||
317 | /* Set of show/store abstract level functions for PCI Parity object */ | |
318 | static ssize_t edac_pci_dev_show(struct kobject *kobj, struct attribute *attr, | |
e7ecd891 | 319 | char *buffer) |
da9bb1d2 AC |
320 | { |
321 | struct edac_pci_dev_attribute *edac_pci_dev; | |
322 | edac_pci_dev= (struct edac_pci_dev_attribute*)attr; | |
323 | ||
324 | if (edac_pci_dev->show) | |
325 | return edac_pci_dev->show(edac_pci_dev->value, buffer); | |
326 | return -EIO; | |
327 | } | |
328 | ||
e7ecd891 DP |
329 | static ssize_t edac_pci_dev_store(struct kobject *kobj, |
330 | struct attribute *attr, const char *buffer, size_t count) | |
da9bb1d2 AC |
331 | { |
332 | struct edac_pci_dev_attribute *edac_pci_dev; | |
333 | edac_pci_dev= (struct edac_pci_dev_attribute*)attr; | |
334 | ||
335 | if (edac_pci_dev->show) | |
336 | return edac_pci_dev->store(edac_pci_dev->value, buffer, count); | |
337 | return -EIO; | |
338 | } | |
339 | ||
340 | static struct sysfs_ops edac_pci_sysfs_ops = { | |
341 | .show = edac_pci_dev_show, | |
342 | .store = edac_pci_dev_store | |
343 | }; | |
344 | ||
da9bb1d2 AC |
345 | #define EDAC_PCI_ATTR(_name,_mode,_show,_store) \ |
346 | struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ | |
347 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
348 | .value = &_name, \ | |
349 | .show = _show, \ | |
350 | .store = _store, \ | |
351 | }; | |
352 | ||
353 | #define EDAC_PCI_STRING_ATTR(_name,_data,_mode,_show,_store) \ | |
354 | struct edac_pci_dev_attribute edac_pci_attr_##_name = { \ | |
355 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
356 | .value = _data, \ | |
357 | .show = _show, \ | |
358 | .store = _store, \ | |
359 | }; | |
360 | ||
da9bb1d2 | 361 | /* PCI Parity control files */ |
e7ecd891 DP |
362 | EDAC_PCI_ATTR(check_pci_parity, S_IRUGO|S_IWUSR, edac_pci_int_show, |
363 | edac_pci_int_store); | |
364 | EDAC_PCI_ATTR(panic_on_pci_parity, S_IRUGO|S_IWUSR, edac_pci_int_show, | |
365 | edac_pci_int_store); | |
366 | EDAC_PCI_ATTR(pci_parity_count, S_IRUGO, edac_pci_int_show, NULL); | |
da9bb1d2 AC |
367 | |
368 | /* Base Attributes of the memory ECC object */ | |
369 | static struct edac_pci_dev_attribute *edac_pci_attr[] = { | |
370 | &edac_pci_attr_check_pci_parity, | |
371 | &edac_pci_attr_panic_on_pci_parity, | |
372 | &edac_pci_attr_pci_parity_count, | |
da9bb1d2 AC |
373 | NULL, |
374 | }; | |
375 | ||
376 | /* No memory to release */ | |
377 | static void edac_pci_release(struct kobject *kobj) | |
378 | { | |
537fba28 | 379 | debugf1("%s()\n", __func__); |
472678eb | 380 | complete(&edac_pci_kobj_complete); |
da9bb1d2 AC |
381 | } |
382 | ||
383 | static struct kobj_type ktype_edac_pci = { | |
e7ecd891 DP |
384 | .release = edac_pci_release, |
385 | .sysfs_ops = &edac_pci_sysfs_ops, | |
386 | .default_attrs = (struct attribute **) edac_pci_attr, | |
da9bb1d2 AC |
387 | }; |
388 | ||
389 | /** | |
390 | * edac_sysfs_pci_setup() | |
391 | * | |
392 | */ | |
393 | static int edac_sysfs_pci_setup(void) | |
394 | { | |
395 | int err; | |
396 | ||
537fba28 | 397 | debugf1("%s()\n", __func__); |
da9bb1d2 AC |
398 | |
399 | memset(&edac_pci_kobj, 0, sizeof(edac_pci_kobj)); | |
da9bb1d2 AC |
400 | edac_pci_kobj.parent = &edac_class.kset.kobj; |
401 | edac_pci_kobj.ktype = &ktype_edac_pci; | |
da9bb1d2 | 402 | err = kobject_set_name(&edac_pci_kobj, "pci"); |
e7ecd891 | 403 | |
da9bb1d2 AC |
404 | if (!err) { |
405 | /* Instanstiate the csrow object */ | |
406 | /* FIXME: maybe new sysdev_create_subdir() */ | |
407 | err = kobject_register(&edac_pci_kobj); | |
e7ecd891 | 408 | |
da9bb1d2 AC |
409 | if (err) |
410 | debugf1("Failed to register '.../edac/pci'\n"); | |
411 | else | |
412 | debugf1("Registered '.../edac/pci' kobject\n"); | |
413 | } | |
e7ecd891 | 414 | |
da9bb1d2 AC |
415 | return err; |
416 | } | |
da9bb1d2 AC |
417 | |
418 | static void edac_sysfs_pci_teardown(void) | |
419 | { | |
537fba28 | 420 | debugf0("%s()\n", __func__); |
472678eb | 421 | init_completion(&edac_pci_kobj_complete); |
da9bb1d2 | 422 | kobject_unregister(&edac_pci_kobj); |
472678eb | 423 | wait_for_completion(&edac_pci_kobj_complete); |
da9bb1d2 AC |
424 | } |
425 | ||
37f04581 DT |
426 | |
427 | static u16 get_pci_parity_status(struct pci_dev *dev, int secondary) | |
428 | { | |
429 | int where; | |
430 | u16 status; | |
431 | ||
432 | where = secondary ? PCI_SEC_STATUS : PCI_STATUS; | |
433 | pci_read_config_word(dev, where, &status); | |
434 | ||
435 | /* If we get back 0xFFFF then we must suspect that the card has been | |
436 | * pulled but the Linux PCI layer has not yet finished cleaning up. | |
437 | * We don't want to report on such devices | |
438 | */ | |
439 | ||
440 | if (status == 0xFFFF) { | |
441 | u32 sanity; | |
442 | ||
443 | pci_read_config_dword(dev, 0, &sanity); | |
444 | ||
445 | if (sanity == 0xFFFFFFFF) | |
446 | return 0; | |
447 | } | |
448 | ||
449 | status &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR | | |
450 | PCI_STATUS_PARITY; | |
451 | ||
452 | if (status) | |
453 | /* reset only the bits we are interested in */ | |
454 | pci_write_config_word(dev, where, status); | |
455 | ||
456 | return status; | |
457 | } | |
458 | ||
459 | typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev); | |
460 | ||
461 | /* Clear any PCI parity errors logged by this device. */ | |
462 | static void edac_pci_dev_parity_clear(struct pci_dev *dev) | |
463 | { | |
464 | u8 header_type; | |
465 | ||
466 | get_pci_parity_status(dev, 0); | |
467 | ||
468 | /* read the device TYPE, looking for bridges */ | |
469 | pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); | |
470 | ||
471 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) | |
472 | get_pci_parity_status(dev, 1); | |
473 | } | |
474 | ||
475 | /* | |
476 | * PCI Parity polling | |
477 | * | |
478 | */ | |
479 | static void edac_pci_dev_parity_test(struct pci_dev *dev) | |
480 | { | |
481 | u16 status; | |
482 | u8 header_type; | |
483 | ||
484 | /* read the STATUS register on this device | |
485 | */ | |
486 | status = get_pci_parity_status(dev, 0); | |
487 | ||
488 | debugf2("PCI STATUS= 0x%04x %s\n", status, dev->dev.bus_id ); | |
489 | ||
490 | /* check the status reg for errors */ | |
491 | if (status) { | |
492 | if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) | |
493 | edac_printk(KERN_CRIT, EDAC_PCI, | |
494 | "Signaled System Error on %s\n", | |
495 | pci_name(dev)); | |
496 | ||
497 | if (status & (PCI_STATUS_PARITY)) { | |
498 | edac_printk(KERN_CRIT, EDAC_PCI, | |
499 | "Master Data Parity Error on %s\n", | |
500 | pci_name(dev)); | |
501 | ||
502 | atomic_inc(&pci_parity_count); | |
503 | } | |
504 | ||
505 | if (status & (PCI_STATUS_DETECTED_PARITY)) { | |
506 | edac_printk(KERN_CRIT, EDAC_PCI, | |
507 | "Detected Parity Error on %s\n", | |
508 | pci_name(dev)); | |
509 | ||
510 | atomic_inc(&pci_parity_count); | |
511 | } | |
512 | } | |
513 | ||
514 | /* read the device TYPE, looking for bridges */ | |
515 | pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); | |
516 | ||
517 | debugf2("PCI HEADER TYPE= 0x%02x %s\n", header_type, dev->dev.bus_id ); | |
518 | ||
519 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { | |
520 | /* On bridges, need to examine secondary status register */ | |
521 | status = get_pci_parity_status(dev, 1); | |
522 | ||
523 | debugf2("PCI SEC_STATUS= 0x%04x %s\n", | |
524 | status, dev->dev.bus_id ); | |
525 | ||
526 | /* check the secondary status reg for errors */ | |
527 | if (status) { | |
528 | if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) | |
529 | edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " | |
530 | "Signaled System Error on %s\n", | |
531 | pci_name(dev)); | |
532 | ||
533 | if (status & (PCI_STATUS_PARITY)) { | |
534 | edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " | |
535 | "Master Data Parity Error on " | |
536 | "%s\n", pci_name(dev)); | |
537 | ||
538 | atomic_inc(&pci_parity_count); | |
539 | } | |
540 | ||
541 | if (status & (PCI_STATUS_DETECTED_PARITY)) { | |
542 | edac_printk(KERN_CRIT, EDAC_PCI, "Bridge " | |
543 | "Detected Parity Error on %s\n", | |
544 | pci_name(dev)); | |
545 | ||
546 | atomic_inc(&pci_parity_count); | |
547 | } | |
548 | } | |
549 | } | |
550 | } | |
551 | ||
37f04581 DT |
552 | /* |
553 | * pci_dev parity list iterator | |
554 | * Scan the PCI device list for one iteration, looking for SERRORs | |
555 | * Master Parity ERRORS or Parity ERRORs on primary or secondary devices | |
556 | */ | |
557 | static inline void edac_pci_dev_parity_iterator(pci_parity_check_fn_t fn) | |
558 | { | |
559 | struct pci_dev *dev = NULL; | |
560 | ||
561 | /* request for kernel access to the next PCI device, if any, | |
562 | * and while we are looking at it have its reference count | |
563 | * bumped until we are done with it | |
564 | */ | |
565 | while((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { | |
49c0dab7 | 566 | fn(dev); |
37f04581 DT |
567 | } |
568 | } | |
569 | ||
570 | static void do_pci_parity_check(void) | |
571 | { | |
572 | unsigned long flags; | |
573 | int before_count; | |
574 | ||
575 | debugf3("%s()\n", __func__); | |
576 | ||
577 | if (!check_pci_parity) | |
578 | return; | |
579 | ||
580 | before_count = atomic_read(&pci_parity_count); | |
581 | ||
582 | /* scan all PCI devices looking for a Parity Error on devices and | |
583 | * bridges | |
584 | */ | |
585 | local_irq_save(flags); | |
586 | edac_pci_dev_parity_iterator(edac_pci_dev_parity_test); | |
587 | local_irq_restore(flags); | |
588 | ||
589 | /* Only if operator has selected panic on PCI Error */ | |
590 | if (panic_on_pci_parity) { | |
591 | /* If the count is different 'after' from 'before' */ | |
592 | if (before_count != atomic_read(&pci_parity_count)) | |
593 | panic("EDAC: PCI Parity Error"); | |
594 | } | |
595 | } | |
596 | ||
597 | static inline void clear_pci_parity_errors(void) | |
598 | { | |
599 | /* Clear any PCI bus parity errors that devices initially have logged | |
600 | * in their registers. | |
601 | */ | |
602 | edac_pci_dev_parity_iterator(edac_pci_dev_parity_clear); | |
603 | } | |
604 | ||
605 | #else /* CONFIG_PCI */ | |
606 | ||
49c0dab7 DT |
607 | /* pre-process these away */ |
608 | #define do_pci_parity_check() | |
609 | #define clear_pci_parity_errors() | |
610 | #define edac_sysfs_pci_teardown() | |
611 | #define edac_sysfs_pci_setup() (0) | |
37f04581 | 612 | |
37f04581 DT |
613 | #endif /* CONFIG_PCI */ |
614 | ||
49c0dab7 DT |
615 | /* EDAC sysfs CSROW data structures and methods |
616 | */ | |
da9bb1d2 | 617 | |
49c0dab7 DT |
618 | /* Set of more default csrow<id> attribute show/store functions */ |
619 | static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data, int private) | |
da9bb1d2 | 620 | { |
49c0dab7 | 621 | return sprintf(data,"%u\n", csrow->ue_count); |
da9bb1d2 AC |
622 | } |
623 | ||
49c0dab7 | 624 | static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data, int private) |
da9bb1d2 | 625 | { |
49c0dab7 | 626 | return sprintf(data,"%u\n", csrow->ce_count); |
da9bb1d2 AC |
627 | } |
628 | ||
49c0dab7 | 629 | static ssize_t csrow_size_show(struct csrow_info *csrow, char *data, int private) |
da9bb1d2 | 630 | { |
49c0dab7 | 631 | return sprintf(data,"%u\n", PAGES_TO_MiB(csrow->nr_pages)); |
da9bb1d2 AC |
632 | } |
633 | ||
49c0dab7 | 634 | static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data, int private) |
da9bb1d2 | 635 | { |
49c0dab7 | 636 | return sprintf(data,"%s\n", mem_types[csrow->mtype]); |
da9bb1d2 AC |
637 | } |
638 | ||
49c0dab7 | 639 | static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data, int private) |
da9bb1d2 | 640 | { |
49c0dab7 | 641 | return sprintf(data,"%s\n", dev_types[csrow->dtype]); |
da9bb1d2 AC |
642 | } |
643 | ||
49c0dab7 | 644 | static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data, int private) |
da9bb1d2 | 645 | { |
49c0dab7 | 646 | return sprintf(data,"%s\n", edac_caps[csrow->edac_mode]); |
da9bb1d2 AC |
647 | } |
648 | ||
49c0dab7 DT |
649 | /* show/store functions for DIMM Label attributes */ |
650 | static ssize_t channel_dimm_label_show(struct csrow_info *csrow, | |
651 | char *data, int channel) | |
da9bb1d2 | 652 | { |
49c0dab7 DT |
653 | return snprintf(data, EDAC_MC_LABEL_LEN,"%s", |
654 | csrow->channels[channel].label); | |
da9bb1d2 AC |
655 | } |
656 | ||
49c0dab7 DT |
657 | static ssize_t channel_dimm_label_store(struct csrow_info *csrow, |
658 | const char *data, | |
659 | size_t count, | |
660 | int channel) | |
da9bb1d2 | 661 | { |
49c0dab7 | 662 | ssize_t max_size = 0; |
da9bb1d2 | 663 | |
49c0dab7 DT |
664 | max_size = min((ssize_t)count,(ssize_t)EDAC_MC_LABEL_LEN-1); |
665 | strncpy(csrow->channels[channel].label, data, max_size); | |
666 | csrow->channels[channel].label[max_size] = '\0'; | |
da9bb1d2 | 667 | |
49c0dab7 | 668 | return max_size; |
da9bb1d2 AC |
669 | } |
670 | ||
49c0dab7 DT |
671 | /* show function for dynamic chX_ce_count attribute */ |
672 | static ssize_t channel_ce_count_show(struct csrow_info *csrow, | |
673 | char *data, | |
674 | int channel) | |
da9bb1d2 | 675 | { |
49c0dab7 | 676 | return sprintf(data, "%u\n", csrow->channels[channel].ce_count); |
da9bb1d2 AC |
677 | } |
678 | ||
49c0dab7 | 679 | /* csrow specific attribute structure */ |
da9bb1d2 | 680 | struct csrowdev_attribute { |
e7ecd891 | 681 | struct attribute attr; |
49c0dab7 DT |
682 | ssize_t (*show)(struct csrow_info *,char *,int); |
683 | ssize_t (*store)(struct csrow_info *, const char *,size_t,int); | |
684 | int private; | |
da9bb1d2 AC |
685 | }; |
686 | ||
687 | #define to_csrow(k) container_of(k, struct csrow_info, kobj) | |
688 | #define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr) | |
689 | ||
49c0dab7 DT |
690 | /* Set of show/store higher level functions for default csrow attributes */ |
691 | static ssize_t csrowdev_show(struct kobject *kobj, | |
692 | struct attribute *attr, | |
693 | char *buffer) | |
da9bb1d2 AC |
694 | { |
695 | struct csrow_info *csrow = to_csrow(kobj); | |
696 | struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr); | |
697 | ||
698 | if (csrowdev_attr->show) | |
49c0dab7 DT |
699 | return csrowdev_attr->show(csrow, |
700 | buffer, | |
701 | csrowdev_attr->private); | |
da9bb1d2 AC |
702 | return -EIO; |
703 | } | |
704 | ||
705 | static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr, | |
e7ecd891 | 706 | const char *buffer, size_t count) |
da9bb1d2 AC |
707 | { |
708 | struct csrow_info *csrow = to_csrow(kobj); | |
709 | struct csrowdev_attribute * csrowdev_attr = to_csrowdev_attr(attr); | |
710 | ||
711 | if (csrowdev_attr->store) | |
49c0dab7 DT |
712 | return csrowdev_attr->store(csrow, |
713 | buffer, | |
714 | count, | |
715 | csrowdev_attr->private); | |
da9bb1d2 AC |
716 | return -EIO; |
717 | } | |
718 | ||
719 | static struct sysfs_ops csrowfs_ops = { | |
720 | .show = csrowdev_show, | |
721 | .store = csrowdev_store | |
722 | }; | |
723 | ||
49c0dab7 | 724 | #define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \ |
da9bb1d2 AC |
725 | struct csrowdev_attribute attr_##_name = { \ |
726 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
727 | .show = _show, \ | |
728 | .store = _store, \ | |
49c0dab7 | 729 | .private = _private, \ |
da9bb1d2 AC |
730 | }; |
731 | ||
49c0dab7 DT |
732 | /* default cwrow<id>/attribute files */ |
733 | CSROWDEV_ATTR(size_mb,S_IRUGO,csrow_size_show,NULL,0); | |
734 | CSROWDEV_ATTR(dev_type,S_IRUGO,csrow_dev_type_show,NULL,0); | |
735 | CSROWDEV_ATTR(mem_type,S_IRUGO,csrow_mem_type_show,NULL,0); | |
736 | CSROWDEV_ATTR(edac_mode,S_IRUGO,csrow_edac_mode_show,NULL,0); | |
737 | CSROWDEV_ATTR(ue_count,S_IRUGO,csrow_ue_count_show,NULL,0); | |
738 | CSROWDEV_ATTR(ce_count,S_IRUGO,csrow_ce_count_show,NULL,0); | |
da9bb1d2 | 739 | |
49c0dab7 DT |
740 | /* default attributes of the CSROW<id> object */ |
741 | static struct csrowdev_attribute *default_csrow_attr[] = { | |
da9bb1d2 AC |
742 | &attr_dev_type, |
743 | &attr_mem_type, | |
744 | &attr_edac_mode, | |
745 | &attr_size_mb, | |
746 | &attr_ue_count, | |
747 | &attr_ce_count, | |
da9bb1d2 AC |
748 | NULL, |
749 | }; | |
750 | ||
49c0dab7 DT |
751 | |
752 | /* possible dynamic channel DIMM Label attribute files */ | |
753 | CSROWDEV_ATTR(ch0_dimm_label,S_IRUGO|S_IWUSR, | |
754 | channel_dimm_label_show, | |
755 | channel_dimm_label_store, | |
756 | 0 ); | |
757 | CSROWDEV_ATTR(ch1_dimm_label,S_IRUGO|S_IWUSR, | |
758 | channel_dimm_label_show, | |
759 | channel_dimm_label_store, | |
760 | 1 ); | |
761 | CSROWDEV_ATTR(ch2_dimm_label,S_IRUGO|S_IWUSR, | |
762 | channel_dimm_label_show, | |
763 | channel_dimm_label_store, | |
764 | 2 ); | |
765 | CSROWDEV_ATTR(ch3_dimm_label,S_IRUGO|S_IWUSR, | |
766 | channel_dimm_label_show, | |
767 | channel_dimm_label_store, | |
768 | 3 ); | |
769 | CSROWDEV_ATTR(ch4_dimm_label,S_IRUGO|S_IWUSR, | |
770 | channel_dimm_label_show, | |
771 | channel_dimm_label_store, | |
772 | 4 ); | |
773 | CSROWDEV_ATTR(ch5_dimm_label,S_IRUGO|S_IWUSR, | |
774 | channel_dimm_label_show, | |
775 | channel_dimm_label_store, | |
776 | 5 ); | |
777 | ||
778 | /* Total possible dynamic DIMM Label attribute file table */ | |
779 | static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = { | |
780 | &attr_ch0_dimm_label, | |
781 | &attr_ch1_dimm_label, | |
782 | &attr_ch2_dimm_label, | |
783 | &attr_ch3_dimm_label, | |
784 | &attr_ch4_dimm_label, | |
785 | &attr_ch5_dimm_label | |
786 | }; | |
787 | ||
788 | /* possible dynamic channel ce_count attribute files */ | |
789 | CSROWDEV_ATTR(ch0_ce_count,S_IRUGO|S_IWUSR, | |
790 | channel_ce_count_show, | |
791 | NULL, | |
792 | 0 ); | |
793 | CSROWDEV_ATTR(ch1_ce_count,S_IRUGO|S_IWUSR, | |
794 | channel_ce_count_show, | |
795 | NULL, | |
796 | 1 ); | |
797 | CSROWDEV_ATTR(ch2_ce_count,S_IRUGO|S_IWUSR, | |
798 | channel_ce_count_show, | |
799 | NULL, | |
800 | 2 ); | |
801 | CSROWDEV_ATTR(ch3_ce_count,S_IRUGO|S_IWUSR, | |
802 | channel_ce_count_show, | |
803 | NULL, | |
804 | 3 ); | |
805 | CSROWDEV_ATTR(ch4_ce_count,S_IRUGO|S_IWUSR, | |
806 | channel_ce_count_show, | |
807 | NULL, | |
808 | 4 ); | |
809 | CSROWDEV_ATTR(ch5_ce_count,S_IRUGO|S_IWUSR, | |
810 | channel_ce_count_show, | |
811 | NULL, | |
812 | 5 ); | |
813 | ||
814 | /* Total possible dynamic ce_count attribute file table */ | |
815 | static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = { | |
816 | &attr_ch0_ce_count, | |
817 | &attr_ch1_ce_count, | |
818 | &attr_ch2_ce_count, | |
819 | &attr_ch3_ce_count, | |
820 | &attr_ch4_ce_count, | |
821 | &attr_ch5_ce_count | |
822 | }; | |
823 | ||
824 | ||
825 | #define EDAC_NR_CHANNELS 6 | |
826 | ||
827 | /* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */ | |
828 | static int edac_create_channel_files(struct kobject *kobj, int chan) | |
829 | { | |
830 | int err=-ENODEV; | |
831 | ||
832 | if (chan >= EDAC_NR_CHANNELS) | |
833 | return err; | |
834 | ||
835 | /* create the DIMM label attribute file */ | |
836 | err = sysfs_create_file(kobj, | |
837 | (struct attribute *) dynamic_csrow_dimm_attr[chan]); | |
838 | ||
839 | if (!err) { | |
840 | /* create the CE Count attribute file */ | |
841 | err = sysfs_create_file(kobj, | |
842 | (struct attribute *) dynamic_csrow_ce_count_attr[chan]); | |
843 | } else { | |
844 | debugf1("%s() dimm labels and ce_count files created", __func__); | |
845 | } | |
846 | ||
847 | return err; | |
848 | } | |
849 | ||
850 | /* No memory to release for this kobj */ | |
da9bb1d2 AC |
851 | static void edac_csrow_instance_release(struct kobject *kobj) |
852 | { | |
472678eb DP |
853 | struct csrow_info *cs; |
854 | ||
472678eb DP |
855 | cs = container_of(kobj, struct csrow_info, kobj); |
856 | complete(&cs->kobj_complete); | |
da9bb1d2 AC |
857 | } |
858 | ||
49c0dab7 | 859 | /* the kobj_type instance for a CSROW */ |
da9bb1d2 | 860 | static struct kobj_type ktype_csrow = { |
e7ecd891 DP |
861 | .release = edac_csrow_instance_release, |
862 | .sysfs_ops = &csrowfs_ops, | |
49c0dab7 | 863 | .default_attrs = (struct attribute **) default_csrow_attr, |
da9bb1d2 AC |
864 | }; |
865 | ||
866 | /* Create a CSROW object under specifed edac_mc_device */ | |
49c0dab7 DT |
867 | static int edac_create_csrow_object( |
868 | struct kobject *edac_mci_kobj, | |
869 | struct csrow_info *csrow, | |
870 | int index) | |
da9bb1d2 AC |
871 | { |
872 | int err = 0; | |
49c0dab7 | 873 | int chan; |
da9bb1d2 | 874 | |
da9bb1d2 AC |
875 | memset(&csrow->kobj, 0, sizeof(csrow->kobj)); |
876 | ||
877 | /* generate ..../edac/mc/mc<id>/csrow<index> */ | |
878 | ||
da9bb1d2 AC |
879 | csrow->kobj.parent = edac_mci_kobj; |
880 | csrow->kobj.ktype = &ktype_csrow; | |
881 | ||
882 | /* name this instance of csrow<id> */ | |
883 | err = kobject_set_name(&csrow->kobj,"csrow%d",index); | |
49c0dab7 DT |
884 | if (err) |
885 | goto error_exit; | |
e7ecd891 | 886 | |
49c0dab7 DT |
887 | /* Instanstiate the csrow object */ |
888 | err = kobject_register(&csrow->kobj); | |
da9bb1d2 | 889 | if (!err) { |
49c0dab7 DT |
890 | /* Create the dyanmic attribute files on this csrow, |
891 | * namely, the DIMM labels and the channel ce_count | |
892 | */ | |
893 | for (chan = 0; chan < csrow->nr_channels; chan++) { | |
894 | err = edac_create_channel_files(&csrow->kobj,chan); | |
895 | if (err) | |
896 | break; | |
897 | } | |
da9bb1d2 AC |
898 | } |
899 | ||
49c0dab7 | 900 | error_exit: |
da9bb1d2 AC |
901 | return err; |
902 | } | |
903 | ||
49c0dab7 | 904 | /* default sysfs methods and data structures for the main MCI kobject */ |
da9bb1d2 | 905 | |
e7ecd891 DP |
906 | static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci, |
907 | const char *data, size_t count) | |
da9bb1d2 AC |
908 | { |
909 | int row, chan; | |
910 | ||
911 | mci->ue_noinfo_count = 0; | |
912 | mci->ce_noinfo_count = 0; | |
913 | mci->ue_count = 0; | |
914 | mci->ce_count = 0; | |
e7ecd891 | 915 | |
da9bb1d2 AC |
916 | for (row = 0; row < mci->nr_csrows; row++) { |
917 | struct csrow_info *ri = &mci->csrows[row]; | |
918 | ||
919 | ri->ue_count = 0; | |
920 | ri->ce_count = 0; | |
e7ecd891 | 921 | |
da9bb1d2 AC |
922 | for (chan = 0; chan < ri->nr_channels; chan++) |
923 | ri->channels[chan].ce_count = 0; | |
924 | } | |
da9bb1d2 | 925 | |
e7ecd891 | 926 | mci->start_time = jiffies; |
da9bb1d2 AC |
927 | return count; |
928 | } | |
929 | ||
49c0dab7 | 930 | /* default attribute files for the MCI object */ |
da9bb1d2 AC |
931 | static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data) |
932 | { | |
933 | return sprintf(data,"%d\n", mci->ue_count); | |
934 | } | |
935 | ||
936 | static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data) | |
937 | { | |
938 | return sprintf(data,"%d\n", mci->ce_count); | |
939 | } | |
940 | ||
941 | static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data) | |
942 | { | |
943 | return sprintf(data,"%d\n", mci->ce_noinfo_count); | |
944 | } | |
945 | ||
946 | static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data) | |
947 | { | |
948 | return sprintf(data,"%d\n", mci->ue_noinfo_count); | |
949 | } | |
950 | ||
951 | static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data) | |
952 | { | |
953 | return sprintf(data,"%ld\n", (jiffies - mci->start_time) / HZ); | |
954 | } | |
955 | ||
da9bb1d2 AC |
956 | static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data) |
957 | { | |
958 | return sprintf(data,"%s\n", mci->ctl_name); | |
959 | } | |
960 | ||
da9bb1d2 AC |
961 | static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data) |
962 | { | |
963 | int total_pages, csrow_idx; | |
964 | ||
965 | for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows; | |
966 | csrow_idx++) { | |
967 | struct csrow_info *csrow = &mci->csrows[csrow_idx]; | |
968 | ||
969 | if (!csrow->nr_pages) | |
970 | continue; | |
e7ecd891 | 971 | |
da9bb1d2 AC |
972 | total_pages += csrow->nr_pages; |
973 | } | |
974 | ||
975 | return sprintf(data,"%u\n", PAGES_TO_MiB(total_pages)); | |
976 | } | |
977 | ||
978 | struct mcidev_attribute { | |
e7ecd891 | 979 | struct attribute attr; |
da9bb1d2 AC |
980 | ssize_t (*show)(struct mem_ctl_info *,char *); |
981 | ssize_t (*store)(struct mem_ctl_info *, const char *,size_t); | |
982 | }; | |
983 | ||
984 | #define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj) | |
985 | #define to_mcidev_attr(a) container_of(a, struct mcidev_attribute, attr) | |
986 | ||
49c0dab7 | 987 | /* MCI show/store functions for top most object */ |
da9bb1d2 | 988 | static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr, |
e7ecd891 | 989 | char *buffer) |
da9bb1d2 AC |
990 | { |
991 | struct mem_ctl_info *mem_ctl_info = to_mci(kobj); | |
992 | struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr); | |
993 | ||
994 | if (mcidev_attr->show) | |
995 | return mcidev_attr->show(mem_ctl_info, buffer); | |
e7ecd891 | 996 | |
da9bb1d2 AC |
997 | return -EIO; |
998 | } | |
999 | ||
1000 | static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr, | |
e7ecd891 | 1001 | const char *buffer, size_t count) |
da9bb1d2 AC |
1002 | { |
1003 | struct mem_ctl_info *mem_ctl_info = to_mci(kobj); | |
1004 | struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr); | |
1005 | ||
1006 | if (mcidev_attr->store) | |
1007 | return mcidev_attr->store(mem_ctl_info, buffer, count); | |
e7ecd891 | 1008 | |
da9bb1d2 AC |
1009 | return -EIO; |
1010 | } | |
1011 | ||
1012 | static struct sysfs_ops mci_ops = { | |
e7ecd891 DP |
1013 | .show = mcidev_show, |
1014 | .store = mcidev_store | |
da9bb1d2 AC |
1015 | }; |
1016 | ||
1017 | #define MCIDEV_ATTR(_name,_mode,_show,_store) \ | |
1018 | struct mcidev_attribute mci_attr_##_name = { \ | |
1019 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
1020 | .show = _show, \ | |
1021 | .store = _store, \ | |
1022 | }; | |
1023 | ||
49c0dab7 | 1024 | /* default Control file */ |
da9bb1d2 AC |
1025 | MCIDEV_ATTR(reset_counters,S_IWUSR,NULL,mci_reset_counters_store); |
1026 | ||
49c0dab7 | 1027 | /* default Attribute files */ |
da9bb1d2 | 1028 | MCIDEV_ATTR(mc_name,S_IRUGO,mci_ctl_name_show,NULL); |
da9bb1d2 AC |
1029 | MCIDEV_ATTR(size_mb,S_IRUGO,mci_size_mb_show,NULL); |
1030 | MCIDEV_ATTR(seconds_since_reset,S_IRUGO,mci_seconds_show,NULL); | |
1031 | MCIDEV_ATTR(ue_noinfo_count,S_IRUGO,mci_ue_noinfo_show,NULL); | |
1032 | MCIDEV_ATTR(ce_noinfo_count,S_IRUGO,mci_ce_noinfo_show,NULL); | |
1033 | MCIDEV_ATTR(ue_count,S_IRUGO,mci_ue_count_show,NULL); | |
1034 | MCIDEV_ATTR(ce_count,S_IRUGO,mci_ce_count_show,NULL); | |
da9bb1d2 | 1035 | |
da9bb1d2 AC |
1036 | static struct mcidev_attribute *mci_attr[] = { |
1037 | &mci_attr_reset_counters, | |
da9bb1d2 | 1038 | &mci_attr_mc_name, |
da9bb1d2 AC |
1039 | &mci_attr_size_mb, |
1040 | &mci_attr_seconds_since_reset, | |
1041 | &mci_attr_ue_noinfo_count, | |
1042 | &mci_attr_ce_noinfo_count, | |
1043 | &mci_attr_ue_count, | |
1044 | &mci_attr_ce_count, | |
1045 | NULL | |
1046 | }; | |
1047 | ||
da9bb1d2 AC |
1048 | /* |
1049 | * Release of a MC controlling instance | |
1050 | */ | |
1051 | static void edac_mci_instance_release(struct kobject *kobj) | |
1052 | { | |
1053 | struct mem_ctl_info *mci; | |
da9bb1d2 | 1054 | |
472678eb DP |
1055 | mci = to_mci(kobj); |
1056 | debugf0("%s() idx=%d\n", __func__, mci->mc_idx); | |
1057 | complete(&mci->kobj_complete); | |
da9bb1d2 AC |
1058 | } |
1059 | ||
1060 | static struct kobj_type ktype_mci = { | |
e7ecd891 DP |
1061 | .release = edac_mci_instance_release, |
1062 | .sysfs_ops = &mci_ops, | |
1063 | .default_attrs = (struct attribute **) mci_attr, | |
da9bb1d2 AC |
1064 | }; |
1065 | ||
ceb2ca9c | 1066 | |
da9bb1d2 AC |
1067 | #define EDAC_DEVICE_SYMLINK "device" |
1068 | ||
1069 | /* | |
1070 | * Create a new Memory Controller kobject instance, | |
1071 | * mc<id> under the 'mc' directory | |
1072 | * | |
1073 | * Return: | |
1074 | * 0 Success | |
1075 | * !0 Failure | |
1076 | */ | |
1077 | static int edac_create_sysfs_mci_device(struct mem_ctl_info *mci) | |
1078 | { | |
1079 | int i; | |
1080 | int err; | |
1081 | struct csrow_info *csrow; | |
1082 | struct kobject *edac_mci_kobj=&mci->edac_mci_kobj; | |
1083 | ||
537fba28 | 1084 | debugf0("%s() idx=%d\n", __func__, mci->mc_idx); |
da9bb1d2 | 1085 | memset(edac_mci_kobj, 0, sizeof(*edac_mci_kobj)); |
da9bb1d2 AC |
1086 | |
1087 | /* set the name of the mc<id> object */ | |
1088 | err = kobject_set_name(edac_mci_kobj,"mc%d",mci->mc_idx); | |
1089 | if (err) | |
1090 | return err; | |
1091 | ||
1092 | /* link to our parent the '..../edac/mc' object */ | |
1093 | edac_mci_kobj->parent = &edac_memctrl_kobj; | |
1094 | edac_mci_kobj->ktype = &ktype_mci; | |
1095 | ||
1096 | /* register the mc<id> kobject */ | |
1097 | err = kobject_register(edac_mci_kobj); | |
1098 | if (err) | |
1099 | return err; | |
1100 | ||
1101 | /* create a symlink for the device */ | |
37f04581 | 1102 | err = sysfs_create_link(edac_mci_kobj, &mci->dev->kobj, |
da9bb1d2 | 1103 | EDAC_DEVICE_SYMLINK); |
6e5a8748 DP |
1104 | if (err) |
1105 | goto fail0; | |
da9bb1d2 AC |
1106 | |
1107 | /* Make directories for each CSROW object | |
1108 | * under the mc<id> kobject | |
1109 | */ | |
1110 | for (i = 0; i < mci->nr_csrows; i++) { | |
da9bb1d2 AC |
1111 | csrow = &mci->csrows[i]; |
1112 | ||
1113 | /* Only expose populated CSROWs */ | |
1114 | if (csrow->nr_pages > 0) { | |
1115 | err = edac_create_csrow_object(edac_mci_kobj,csrow,i); | |
1116 | if (err) | |
6e5a8748 | 1117 | goto fail1; |
da9bb1d2 AC |
1118 | } |
1119 | } | |
1120 | ||
da9bb1d2 AC |
1121 | return 0; |
1122 | ||
da9bb1d2 | 1123 | /* CSROW error: backout what has already been registered, */ |
6e5a8748 | 1124 | fail1: |
da9bb1d2 | 1125 | for ( i--; i >= 0; i--) { |
472678eb DP |
1126 | if (csrow->nr_pages > 0) { |
1127 | init_completion(&csrow->kobj_complete); | |
da9bb1d2 | 1128 | kobject_unregister(&mci->csrows[i].kobj); |
472678eb DP |
1129 | wait_for_completion(&csrow->kobj_complete); |
1130 | } | |
da9bb1d2 AC |
1131 | } |
1132 | ||
6e5a8748 | 1133 | fail0: |
472678eb | 1134 | init_completion(&mci->kobj_complete); |
da9bb1d2 | 1135 | kobject_unregister(edac_mci_kobj); |
472678eb | 1136 | wait_for_completion(&mci->kobj_complete); |
da9bb1d2 AC |
1137 | return err; |
1138 | } | |
1139 | ||
1140 | /* | |
1141 | * remove a Memory Controller instance | |
1142 | */ | |
1143 | static void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci) | |
1144 | { | |
1145 | int i; | |
1146 | ||
537fba28 | 1147 | debugf0("%s()\n", __func__); |
da9bb1d2 AC |
1148 | |
1149 | /* remove all csrow kobjects */ | |
1150 | for (i = 0; i < mci->nr_csrows; i++) { | |
472678eb DP |
1151 | if (mci->csrows[i].nr_pages > 0) { |
1152 | init_completion(&mci->csrows[i].kobj_complete); | |
da9bb1d2 | 1153 | kobject_unregister(&mci->csrows[i].kobj); |
472678eb DP |
1154 | wait_for_completion(&mci->csrows[i].kobj_complete); |
1155 | } | |
da9bb1d2 AC |
1156 | } |
1157 | ||
1158 | sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK); | |
472678eb | 1159 | init_completion(&mci->kobj_complete); |
da9bb1d2 | 1160 | kobject_unregister(&mci->edac_mci_kobj); |
472678eb | 1161 | wait_for_completion(&mci->kobj_complete); |
da9bb1d2 AC |
1162 | } |
1163 | ||
1164 | /* END OF sysfs data and methods */ | |
1165 | ||
1166 | #ifdef CONFIG_EDAC_DEBUG | |
1167 | ||
da9bb1d2 AC |
1168 | void edac_mc_dump_channel(struct channel_info *chan) |
1169 | { | |
1170 | debugf4("\tchannel = %p\n", chan); | |
1171 | debugf4("\tchannel->chan_idx = %d\n", chan->chan_idx); | |
1172 | debugf4("\tchannel->ce_count = %d\n", chan->ce_count); | |
1173 | debugf4("\tchannel->label = '%s'\n", chan->label); | |
1174 | debugf4("\tchannel->csrow = %p\n\n", chan->csrow); | |
1175 | } | |
9110540f | 1176 | EXPORT_SYMBOL_GPL(edac_mc_dump_channel); |
da9bb1d2 | 1177 | |
da9bb1d2 AC |
1178 | void edac_mc_dump_csrow(struct csrow_info *csrow) |
1179 | { | |
1180 | debugf4("\tcsrow = %p\n", csrow); | |
1181 | debugf4("\tcsrow->csrow_idx = %d\n", csrow->csrow_idx); | |
1182 | debugf4("\tcsrow->first_page = 0x%lx\n", | |
1183 | csrow->first_page); | |
1184 | debugf4("\tcsrow->last_page = 0x%lx\n", csrow->last_page); | |
1185 | debugf4("\tcsrow->page_mask = 0x%lx\n", csrow->page_mask); | |
1186 | debugf4("\tcsrow->nr_pages = 0x%x\n", csrow->nr_pages); | |
1187 | debugf4("\tcsrow->nr_channels = %d\n", | |
1188 | csrow->nr_channels); | |
1189 | debugf4("\tcsrow->channels = %p\n", csrow->channels); | |
1190 | debugf4("\tcsrow->mci = %p\n\n", csrow->mci); | |
1191 | } | |
9110540f | 1192 | EXPORT_SYMBOL_GPL(edac_mc_dump_csrow); |
da9bb1d2 | 1193 | |
da9bb1d2 AC |
1194 | void edac_mc_dump_mci(struct mem_ctl_info *mci) |
1195 | { | |
1196 | debugf3("\tmci = %p\n", mci); | |
1197 | debugf3("\tmci->mtype_cap = %lx\n", mci->mtype_cap); | |
1198 | debugf3("\tmci->edac_ctl_cap = %lx\n", mci->edac_ctl_cap); | |
1199 | debugf3("\tmci->edac_cap = %lx\n", mci->edac_cap); | |
1200 | debugf4("\tmci->edac_check = %p\n", mci->edac_check); | |
1201 | debugf3("\tmci->nr_csrows = %d, csrows = %p\n", | |
1202 | mci->nr_csrows, mci->csrows); | |
37f04581 | 1203 | debugf3("\tdev = %p\n", mci->dev); |
da9bb1d2 AC |
1204 | debugf3("\tmod_name:ctl_name = %s:%s\n", |
1205 | mci->mod_name, mci->ctl_name); | |
1206 | debugf3("\tpvt_info = %p\n\n", mci->pvt_info); | |
1207 | } | |
9110540f | 1208 | EXPORT_SYMBOL_GPL(edac_mc_dump_mci); |
da9bb1d2 | 1209 | |
e7ecd891 | 1210 | #endif /* CONFIG_EDAC_DEBUG */ |
da9bb1d2 AC |
1211 | |
1212 | /* 'ptr' points to a possibly unaligned item X such that sizeof(X) is 'size'. | |
1213 | * Adjust 'ptr' so that its alignment is at least as stringent as what the | |
1214 | * compiler would provide for X and return the aligned result. | |
1215 | * | |
1216 | * If 'size' is a constant, the compiler will optimize this whole function | |
1217 | * down to either a no-op or the addition of a constant to the value of 'ptr'. | |
1218 | */ | |
e7ecd891 | 1219 | static inline char * align_ptr(void *ptr, unsigned size) |
da9bb1d2 AC |
1220 | { |
1221 | unsigned align, r; | |
1222 | ||
1223 | /* Here we assume that the alignment of a "long long" is the most | |
1224 | * stringent alignment that the compiler will ever provide by default. | |
1225 | * As far as I know, this is a reasonable assumption. | |
1226 | */ | |
1227 | if (size > sizeof(long)) | |
1228 | align = sizeof(long long); | |
1229 | else if (size > sizeof(int)) | |
1230 | align = sizeof(long); | |
1231 | else if (size > sizeof(short)) | |
1232 | align = sizeof(int); | |
1233 | else if (size > sizeof(char)) | |
1234 | align = sizeof(short); | |
1235 | else | |
1236 | return (char *) ptr; | |
1237 | ||
1238 | r = size % align; | |
1239 | ||
1240 | if (r == 0) | |
1241 | return (char *) ptr; | |
1242 | ||
1243 | return (char *) (((unsigned long) ptr) + align - r); | |
1244 | } | |
1245 | ||
da9bb1d2 AC |
1246 | /** |
1247 | * edac_mc_alloc: Allocate a struct mem_ctl_info structure | |
1248 | * @size_pvt: size of private storage needed | |
1249 | * @nr_csrows: Number of CWROWS needed for this MC | |
1250 | * @nr_chans: Number of channels for the MC | |
1251 | * | |
1252 | * Everything is kmalloc'ed as one big chunk - more efficient. | |
1253 | * Only can be used if all structures have the same lifetime - otherwise | |
1254 | * you have to allocate and initialize your own structures. | |
1255 | * | |
1256 | * Use edac_mc_free() to free mc structures allocated by this function. | |
1257 | * | |
1258 | * Returns: | |
1259 | * NULL allocation failed | |
1260 | * struct mem_ctl_info pointer | |
1261 | */ | |
1262 | struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows, | |
e7ecd891 | 1263 | unsigned nr_chans) |
da9bb1d2 AC |
1264 | { |
1265 | struct mem_ctl_info *mci; | |
1266 | struct csrow_info *csi, *csrow; | |
1267 | struct channel_info *chi, *chp, *chan; | |
1268 | void *pvt; | |
1269 | unsigned size; | |
1270 | int row, chn; | |
1271 | ||
1272 | /* Figure out the offsets of the various items from the start of an mc | |
1273 | * structure. We want the alignment of each item to be at least as | |
1274 | * stringent as what the compiler would provide if we could simply | |
1275 | * hardcode everything into a single struct. | |
1276 | */ | |
1277 | mci = (struct mem_ctl_info *) 0; | |
1278 | csi = (struct csrow_info *)align_ptr(&mci[1], sizeof(*csi)); | |
1279 | chi = (struct channel_info *) | |
1280 | align_ptr(&csi[nr_csrows], sizeof(*chi)); | |
1281 | pvt = align_ptr(&chi[nr_chans * nr_csrows], sz_pvt); | |
1282 | size = ((unsigned long) pvt) + sz_pvt; | |
1283 | ||
1284 | if ((mci = kmalloc(size, GFP_KERNEL)) == NULL) | |
1285 | return NULL; | |
1286 | ||
1287 | /* Adjust pointers so they point within the memory we just allocated | |
1288 | * rather than an imaginary chunk of memory located at address 0. | |
1289 | */ | |
1290 | csi = (struct csrow_info *) (((char *) mci) + ((unsigned long) csi)); | |
1291 | chi = (struct channel_info *) (((char *) mci) + ((unsigned long) chi)); | |
1292 | pvt = sz_pvt ? (((char *) mci) + ((unsigned long) pvt)) : NULL; | |
1293 | ||
e7ecd891 | 1294 | memset(mci, 0, size); /* clear all fields */ |
da9bb1d2 AC |
1295 | mci->csrows = csi; |
1296 | mci->pvt_info = pvt; | |
1297 | mci->nr_csrows = nr_csrows; | |
1298 | ||
1299 | for (row = 0; row < nr_csrows; row++) { | |
1300 | csrow = &csi[row]; | |
1301 | csrow->csrow_idx = row; | |
1302 | csrow->mci = mci; | |
1303 | csrow->nr_channels = nr_chans; | |
1304 | chp = &chi[row * nr_chans]; | |
1305 | csrow->channels = chp; | |
1306 | ||
1307 | for (chn = 0; chn < nr_chans; chn++) { | |
1308 | chan = &chp[chn]; | |
1309 | chan->chan_idx = chn; | |
1310 | chan->csrow = csrow; | |
1311 | } | |
1312 | } | |
1313 | ||
1314 | return mci; | |
1315 | } | |
9110540f | 1316 | EXPORT_SYMBOL_GPL(edac_mc_alloc); |
da9bb1d2 | 1317 | |
da9bb1d2 AC |
1318 | /** |
1319 | * edac_mc_free: Free a previously allocated 'mci' structure | |
1320 | * @mci: pointer to a struct mem_ctl_info structure | |
da9bb1d2 AC |
1321 | */ |
1322 | void edac_mc_free(struct mem_ctl_info *mci) | |
1323 | { | |
472678eb | 1324 | kfree(mci); |
da9bb1d2 | 1325 | } |
9110540f | 1326 | EXPORT_SYMBOL_GPL(edac_mc_free); |
da9bb1d2 | 1327 | |
37f04581 | 1328 | static struct mem_ctl_info *find_mci_by_dev(struct device *dev) |
da9bb1d2 AC |
1329 | { |
1330 | struct mem_ctl_info *mci; | |
1331 | struct list_head *item; | |
1332 | ||
537fba28 | 1333 | debugf3("%s()\n", __func__); |
da9bb1d2 AC |
1334 | |
1335 | list_for_each(item, &mc_devices) { | |
1336 | mci = list_entry(item, struct mem_ctl_info, link); | |
1337 | ||
37f04581 | 1338 | if (mci->dev == dev) |
da9bb1d2 AC |
1339 | return mci; |
1340 | } | |
1341 | ||
1342 | return NULL; | |
1343 | } | |
1344 | ||
2d7bbb91 DT |
1345 | /* Return 0 on success, 1 on failure. |
1346 | * Before calling this function, caller must | |
1347 | * assign a unique value to mci->mc_idx. | |
1348 | */ | |
1349 | static int add_mc_to_global_list (struct mem_ctl_info *mci) | |
da9bb1d2 AC |
1350 | { |
1351 | struct list_head *item, *insert_before; | |
1352 | struct mem_ctl_info *p; | |
da9bb1d2 | 1353 | |
2d7bbb91 | 1354 | insert_before = &mc_devices; |
da9bb1d2 | 1355 | |
2d7bbb91 DT |
1356 | if (unlikely((p = find_mci_by_dev(mci->dev)) != NULL)) |
1357 | goto fail0; | |
da9bb1d2 | 1358 | |
2d7bbb91 DT |
1359 | list_for_each(item, &mc_devices) { |
1360 | p = list_entry(item, struct mem_ctl_info, link); | |
da9bb1d2 | 1361 | |
2d7bbb91 DT |
1362 | if (p->mc_idx >= mci->mc_idx) { |
1363 | if (unlikely(p->mc_idx == mci->mc_idx)) | |
1364 | goto fail1; | |
da9bb1d2 | 1365 | |
2d7bbb91 DT |
1366 | insert_before = item; |
1367 | break; | |
da9bb1d2 | 1368 | } |
da9bb1d2 AC |
1369 | } |
1370 | ||
1371 | list_add_tail_rcu(&mci->link, insert_before); | |
1372 | return 0; | |
2d7bbb91 DT |
1373 | |
1374 | fail0: | |
1375 | edac_printk(KERN_WARNING, EDAC_MC, | |
1376 | "%s (%s) %s %s already assigned %d\n", p->dev->bus_id, | |
1377 | dev_name(p->dev), p->mod_name, p->ctl_name, p->mc_idx); | |
1378 | return 1; | |
1379 | ||
1380 | fail1: | |
1381 | edac_printk(KERN_WARNING, EDAC_MC, | |
1382 | "bug in low-level driver: attempt to assign\n" | |
1383 | " duplicate mc_idx %d in %s()\n", p->mc_idx, __func__); | |
1384 | return 1; | |
da9bb1d2 AC |
1385 | } |
1386 | ||
e7ecd891 | 1387 | static void complete_mc_list_del(struct rcu_head *head) |
a1d03fcc DP |
1388 | { |
1389 | struct mem_ctl_info *mci; | |
1390 | ||
1391 | mci = container_of(head, struct mem_ctl_info, rcu); | |
1392 | INIT_LIST_HEAD(&mci->link); | |
1393 | complete(&mci->complete); | |
1394 | } | |
1395 | ||
e7ecd891 | 1396 | static void del_mc_from_global_list(struct mem_ctl_info *mci) |
a1d03fcc DP |
1397 | { |
1398 | list_del_rcu(&mci->link); | |
1399 | init_completion(&mci->complete); | |
1400 | call_rcu(&mci->rcu, complete_mc_list_del); | |
1401 | wait_for_completion(&mci->complete); | |
1402 | } | |
1403 | ||
da9bb1d2 | 1404 | /** |
472678eb DP |
1405 | * edac_mc_add_mc: Insert the 'mci' structure into the mci global list and |
1406 | * create sysfs entries associated with mci structure | |
da9bb1d2 | 1407 | * @mci: pointer to the mci structure to be added to the list |
2d7bbb91 | 1408 | * @mc_idx: A unique numeric identifier to be assigned to the 'mci' structure. |
da9bb1d2 AC |
1409 | * |
1410 | * Return: | |
1411 | * 0 Success | |
1412 | * !0 Failure | |
1413 | */ | |
1414 | ||
1415 | /* FIXME - should a warning be printed if no error detection? correction? */ | |
2d7bbb91 | 1416 | int edac_mc_add_mc(struct mem_ctl_info *mci, int mc_idx) |
da9bb1d2 | 1417 | { |
537fba28 | 1418 | debugf0("%s()\n", __func__); |
2d7bbb91 | 1419 | mci->mc_idx = mc_idx; |
da9bb1d2 AC |
1420 | #ifdef CONFIG_EDAC_DEBUG |
1421 | if (edac_debug_level >= 3) | |
1422 | edac_mc_dump_mci(mci); | |
e7ecd891 | 1423 | |
da9bb1d2 AC |
1424 | if (edac_debug_level >= 4) { |
1425 | int i; | |
1426 | ||
1427 | for (i = 0; i < mci->nr_csrows; i++) { | |
1428 | int j; | |
e7ecd891 | 1429 | |
da9bb1d2 AC |
1430 | edac_mc_dump_csrow(&mci->csrows[i]); |
1431 | for (j = 0; j < mci->csrows[i].nr_channels; j++) | |
e7ecd891 DP |
1432 | edac_mc_dump_channel( |
1433 | &mci->csrows[i].channels[j]); | |
da9bb1d2 AC |
1434 | } |
1435 | } | |
1436 | #endif | |
1437 | down(&mem_ctls_mutex); | |
1438 | ||
1439 | if (add_mc_to_global_list(mci)) | |
028a7b6d | 1440 | goto fail0; |
da9bb1d2 AC |
1441 | |
1442 | /* set load time so that error rate can be tracked */ | |
1443 | mci->start_time = jiffies; | |
1444 | ||
1445 | if (edac_create_sysfs_mci_device(mci)) { | |
537fba28 DP |
1446 | edac_mc_printk(mci, KERN_WARNING, |
1447 | "failed to create sysfs device\n"); | |
028a7b6d | 1448 | goto fail1; |
da9bb1d2 AC |
1449 | } |
1450 | ||
1451 | /* Report action taken */ | |
37f04581 DT |
1452 | edac_mc_printk(mci, KERN_INFO, "Giving out device to %s %s: DEV %s\n", |
1453 | mci->mod_name, mci->ctl_name, dev_name(mci->dev)); | |
da9bb1d2 | 1454 | |
028a7b6d DP |
1455 | up(&mem_ctls_mutex); |
1456 | return 0; | |
da9bb1d2 | 1457 | |
028a7b6d DP |
1458 | fail1: |
1459 | del_mc_from_global_list(mci); | |
1460 | ||
1461 | fail0: | |
da9bb1d2 | 1462 | up(&mem_ctls_mutex); |
028a7b6d | 1463 | return 1; |
da9bb1d2 | 1464 | } |
9110540f | 1465 | EXPORT_SYMBOL_GPL(edac_mc_add_mc); |
da9bb1d2 | 1466 | |
da9bb1d2 | 1467 | /** |
472678eb DP |
1468 | * edac_mc_del_mc: Remove sysfs entries for specified mci structure and |
1469 | * remove mci structure from global list | |
37f04581 | 1470 | * @pdev: Pointer to 'struct device' representing mci structure to remove. |
da9bb1d2 | 1471 | * |
18dbc337 | 1472 | * Return pointer to removed mci structure, or NULL if device not found. |
da9bb1d2 | 1473 | */ |
37f04581 | 1474 | struct mem_ctl_info * edac_mc_del_mc(struct device *dev) |
da9bb1d2 | 1475 | { |
18dbc337 | 1476 | struct mem_ctl_info *mci; |
da9bb1d2 | 1477 | |
18dbc337 | 1478 | debugf0("MC: %s()\n", __func__); |
da9bb1d2 | 1479 | down(&mem_ctls_mutex); |
18dbc337 | 1480 | |
37f04581 | 1481 | if ((mci = find_mci_by_dev(dev)) == NULL) { |
18dbc337 DP |
1482 | up(&mem_ctls_mutex); |
1483 | return NULL; | |
1484 | } | |
1485 | ||
1486 | edac_remove_sysfs_mci_device(mci); | |
da9bb1d2 | 1487 | del_mc_from_global_list(mci); |
18dbc337 | 1488 | up(&mem_ctls_mutex); |
537fba28 | 1489 | edac_printk(KERN_INFO, EDAC_MC, |
37f04581 DT |
1490 | "Removed device %d for %s %s: DEV %s\n", mci->mc_idx, |
1491 | mci->mod_name, mci->ctl_name, dev_name(mci->dev)); | |
18dbc337 | 1492 | return mci; |
da9bb1d2 | 1493 | } |
9110540f | 1494 | EXPORT_SYMBOL_GPL(edac_mc_del_mc); |
da9bb1d2 | 1495 | |
e7ecd891 | 1496 | void edac_mc_scrub_block(unsigned long page, unsigned long offset, u32 size) |
da9bb1d2 AC |
1497 | { |
1498 | struct page *pg; | |
1499 | void *virt_addr; | |
1500 | unsigned long flags = 0; | |
1501 | ||
537fba28 | 1502 | debugf3("%s()\n", __func__); |
da9bb1d2 AC |
1503 | |
1504 | /* ECC error page was not in our memory. Ignore it. */ | |
1505 | if(!pfn_valid(page)) | |
1506 | return; | |
1507 | ||
1508 | /* Find the actual page structure then map it and fix */ | |
1509 | pg = pfn_to_page(page); | |
1510 | ||
1511 | if (PageHighMem(pg)) | |
1512 | local_irq_save(flags); | |
1513 | ||
1514 | virt_addr = kmap_atomic(pg, KM_BOUNCE_READ); | |
1515 | ||
1516 | /* Perform architecture specific atomic scrub operation */ | |
1517 | atomic_scrub(virt_addr + offset, size); | |
1518 | ||
1519 | /* Unmap and complete */ | |
1520 | kunmap_atomic(virt_addr, KM_BOUNCE_READ); | |
1521 | ||
1522 | if (PageHighMem(pg)) | |
1523 | local_irq_restore(flags); | |
1524 | } | |
9110540f | 1525 | EXPORT_SYMBOL_GPL(edac_mc_scrub_block); |
da9bb1d2 | 1526 | |
da9bb1d2 | 1527 | /* FIXME - should return -1 */ |
e7ecd891 | 1528 | int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, unsigned long page) |
da9bb1d2 AC |
1529 | { |
1530 | struct csrow_info *csrows = mci->csrows; | |
1531 | int row, i; | |
1532 | ||
537fba28 | 1533 | debugf1("MC%d: %s(): 0x%lx\n", mci->mc_idx, __func__, page); |
da9bb1d2 AC |
1534 | row = -1; |
1535 | ||
1536 | for (i = 0; i < mci->nr_csrows; i++) { | |
1537 | struct csrow_info *csrow = &csrows[i]; | |
1538 | ||
1539 | if (csrow->nr_pages == 0) | |
1540 | continue; | |
1541 | ||
537fba28 DP |
1542 | debugf3("MC%d: %s(): first(0x%lx) page(0x%lx) last(0x%lx) " |
1543 | "mask(0x%lx)\n", mci->mc_idx, __func__, | |
1544 | csrow->first_page, page, csrow->last_page, | |
1545 | csrow->page_mask); | |
da9bb1d2 AC |
1546 | |
1547 | if ((page >= csrow->first_page) && | |
1548 | (page <= csrow->last_page) && | |
1549 | ((page & csrow->page_mask) == | |
1550 | (csrow->first_page & csrow->page_mask))) { | |
1551 | row = i; | |
1552 | break; | |
1553 | } | |
1554 | } | |
1555 | ||
1556 | if (row == -1) | |
537fba28 DP |
1557 | edac_mc_printk(mci, KERN_ERR, |
1558 | "could not look up page error address %lx\n", | |
1559 | (unsigned long) page); | |
da9bb1d2 AC |
1560 | |
1561 | return row; | |
1562 | } | |
9110540f | 1563 | EXPORT_SYMBOL_GPL(edac_mc_find_csrow_by_page); |
da9bb1d2 | 1564 | |
da9bb1d2 AC |
1565 | /* FIXME - setable log (warning/emerg) levels */ |
1566 | /* FIXME - integrate with evlog: http://evlog.sourceforge.net/ */ | |
1567 | void edac_mc_handle_ce(struct mem_ctl_info *mci, | |
e7ecd891 DP |
1568 | unsigned long page_frame_number, unsigned long offset_in_page, |
1569 | unsigned long syndrome, int row, int channel, const char *msg) | |
da9bb1d2 AC |
1570 | { |
1571 | unsigned long remapped_page; | |
1572 | ||
537fba28 | 1573 | debugf3("MC%d: %s()\n", mci->mc_idx, __func__); |
da9bb1d2 AC |
1574 | |
1575 | /* FIXME - maybe make panic on INTERNAL ERROR an option */ | |
1576 | if (row >= mci->nr_csrows || row < 0) { | |
1577 | /* something is wrong */ | |
537fba28 DP |
1578 | edac_mc_printk(mci, KERN_ERR, |
1579 | "INTERNAL ERROR: row out of range " | |
1580 | "(%d >= %d)\n", row, mci->nr_csrows); | |
da9bb1d2 AC |
1581 | edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); |
1582 | return; | |
1583 | } | |
e7ecd891 | 1584 | |
da9bb1d2 AC |
1585 | if (channel >= mci->csrows[row].nr_channels || channel < 0) { |
1586 | /* something is wrong */ | |
537fba28 DP |
1587 | edac_mc_printk(mci, KERN_ERR, |
1588 | "INTERNAL ERROR: channel out of range " | |
1589 | "(%d >= %d)\n", channel, | |
1590 | mci->csrows[row].nr_channels); | |
da9bb1d2 AC |
1591 | edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); |
1592 | return; | |
1593 | } | |
1594 | ||
1595 | if (log_ce) | |
1596 | /* FIXME - put in DIMM location */ | |
537fba28 DP |
1597 | edac_mc_printk(mci, KERN_WARNING, |
1598 | "CE page 0x%lx, offset 0x%lx, grain %d, syndrome " | |
1599 | "0x%lx, row %d, channel %d, label \"%s\": %s\n", | |
1600 | page_frame_number, offset_in_page, | |
1601 | mci->csrows[row].grain, syndrome, row, channel, | |
1602 | mci->csrows[row].channels[channel].label, msg); | |
da9bb1d2 AC |
1603 | |
1604 | mci->ce_count++; | |
1605 | mci->csrows[row].ce_count++; | |
1606 | mci->csrows[row].channels[channel].ce_count++; | |
1607 | ||
1608 | if (mci->scrub_mode & SCRUB_SW_SRC) { | |
1609 | /* | |
1610 | * Some MC's can remap memory so that it is still available | |
1611 | * at a different address when PCI devices map into memory. | |
1612 | * MC's that can't do this lose the memory where PCI devices | |
1613 | * are mapped. This mapping is MC dependant and so we call | |
1614 | * back into the MC driver for it to map the MC page to | |
1615 | * a physical (CPU) page which can then be mapped to a virtual | |
1616 | * page - which can then be scrubbed. | |
1617 | */ | |
1618 | remapped_page = mci->ctl_page_to_phys ? | |
1619 | mci->ctl_page_to_phys(mci, page_frame_number) : | |
1620 | page_frame_number; | |
1621 | ||
1622 | edac_mc_scrub_block(remapped_page, offset_in_page, | |
e7ecd891 | 1623 | mci->csrows[row].grain); |
da9bb1d2 AC |
1624 | } |
1625 | } | |
9110540f | 1626 | EXPORT_SYMBOL_GPL(edac_mc_handle_ce); |
da9bb1d2 | 1627 | |
e7ecd891 | 1628 | void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, const char *msg) |
da9bb1d2 AC |
1629 | { |
1630 | if (log_ce) | |
537fba28 DP |
1631 | edac_mc_printk(mci, KERN_WARNING, |
1632 | "CE - no information available: %s\n", msg); | |
e7ecd891 | 1633 | |
da9bb1d2 AC |
1634 | mci->ce_noinfo_count++; |
1635 | mci->ce_count++; | |
1636 | } | |
9110540f | 1637 | EXPORT_SYMBOL_GPL(edac_mc_handle_ce_no_info); |
da9bb1d2 | 1638 | |
da9bb1d2 | 1639 | void edac_mc_handle_ue(struct mem_ctl_info *mci, |
e7ecd891 DP |
1640 | unsigned long page_frame_number, unsigned long offset_in_page, |
1641 | int row, const char *msg) | |
da9bb1d2 AC |
1642 | { |
1643 | int len = EDAC_MC_LABEL_LEN * 4; | |
1644 | char labels[len + 1]; | |
1645 | char *pos = labels; | |
1646 | int chan; | |
1647 | int chars; | |
1648 | ||
537fba28 | 1649 | debugf3("MC%d: %s()\n", mci->mc_idx, __func__); |
da9bb1d2 AC |
1650 | |
1651 | /* FIXME - maybe make panic on INTERNAL ERROR an option */ | |
1652 | if (row >= mci->nr_csrows || row < 0) { | |
1653 | /* something is wrong */ | |
537fba28 DP |
1654 | edac_mc_printk(mci, KERN_ERR, |
1655 | "INTERNAL ERROR: row out of range " | |
1656 | "(%d >= %d)\n", row, mci->nr_csrows); | |
da9bb1d2 AC |
1657 | edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); |
1658 | return; | |
1659 | } | |
1660 | ||
1661 | chars = snprintf(pos, len + 1, "%s", | |
e7ecd891 | 1662 | mci->csrows[row].channels[0].label); |
da9bb1d2 AC |
1663 | len -= chars; |
1664 | pos += chars; | |
e7ecd891 | 1665 | |
da9bb1d2 AC |
1666 | for (chan = 1; (chan < mci->csrows[row].nr_channels) && (len > 0); |
1667 | chan++) { | |
1668 | chars = snprintf(pos, len + 1, ":%s", | |
e7ecd891 | 1669 | mci->csrows[row].channels[chan].label); |
da9bb1d2 AC |
1670 | len -= chars; |
1671 | pos += chars; | |
1672 | } | |
1673 | ||
1674 | if (log_ue) | |
537fba28 DP |
1675 | edac_mc_printk(mci, KERN_EMERG, |
1676 | "UE page 0x%lx, offset 0x%lx, grain %d, row %d, " | |
1677 | "labels \"%s\": %s\n", page_frame_number, | |
1678 | offset_in_page, mci->csrows[row].grain, row, labels, | |
1679 | msg); | |
da9bb1d2 AC |
1680 | |
1681 | if (panic_on_ue) | |
e7ecd891 DP |
1682 | panic("EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, " |
1683 | "row %d, labels \"%s\": %s\n", mci->mc_idx, | |
1684 | page_frame_number, offset_in_page, | |
1685 | mci->csrows[row].grain, row, labels, msg); | |
da9bb1d2 AC |
1686 | |
1687 | mci->ue_count++; | |
1688 | mci->csrows[row].ue_count++; | |
1689 | } | |
9110540f | 1690 | EXPORT_SYMBOL_GPL(edac_mc_handle_ue); |
da9bb1d2 | 1691 | |
e7ecd891 | 1692 | void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, const char *msg) |
da9bb1d2 AC |
1693 | { |
1694 | if (panic_on_ue) | |
1695 | panic("EDAC MC%d: Uncorrected Error", mci->mc_idx); | |
1696 | ||
1697 | if (log_ue) | |
537fba28 DP |
1698 | edac_mc_printk(mci, KERN_WARNING, |
1699 | "UE - no information available: %s\n", msg); | |
da9bb1d2 AC |
1700 | mci->ue_noinfo_count++; |
1701 | mci->ue_count++; | |
1702 | } | |
9110540f | 1703 | EXPORT_SYMBOL_GPL(edac_mc_handle_ue_no_info); |
da9bb1d2 | 1704 | |
da9bb1d2 AC |
1705 | |
1706 | /* | |
1707 | * Iterate over all MC instances and check for ECC, et al, errors | |
1708 | */ | |
e7ecd891 | 1709 | static inline void check_mc_devices(void) |
da9bb1d2 | 1710 | { |
da9bb1d2 AC |
1711 | struct list_head *item; |
1712 | struct mem_ctl_info *mci; | |
1713 | ||
537fba28 | 1714 | debugf3("%s()\n", __func__); |
18dbc337 | 1715 | down(&mem_ctls_mutex); |
da9bb1d2 AC |
1716 | |
1717 | list_for_each(item, &mc_devices) { | |
1718 | mci = list_entry(item, struct mem_ctl_info, link); | |
1719 | ||
1720 | if (mci->edac_check != NULL) | |
1721 | mci->edac_check(mci); | |
1722 | } | |
1723 | ||
18dbc337 | 1724 | up(&mem_ctls_mutex); |
da9bb1d2 AC |
1725 | } |
1726 | ||
da9bb1d2 AC |
1727 | /* |
1728 | * Check MC status every poll_msec. | |
1729 | * Check PCI status every poll_msec as well. | |
1730 | * | |
1731 | * This where the work gets done for edac. | |
1732 | * | |
1733 | * SMP safe, doesn't use NMI, and auto-rate-limits. | |
1734 | */ | |
1735 | static void do_edac_check(void) | |
1736 | { | |
537fba28 | 1737 | debugf3("%s()\n", __func__); |
da9bb1d2 | 1738 | check_mc_devices(); |
da9bb1d2 AC |
1739 | do_pci_parity_check(); |
1740 | } | |
1741 | ||
da9bb1d2 AC |
1742 | static int edac_kernel_thread(void *arg) |
1743 | { | |
f2fe42ab DP |
1744 | while (!kthread_should_stop()) { |
1745 | do_edac_check(); | |
da9bb1d2 AC |
1746 | |
1747 | /* goto sleep for the interval */ | |
f2fe42ab | 1748 | schedule_timeout_interruptible((HZ * poll_msec) / 1000); |
da9bb1d2 AC |
1749 | try_to_freeze(); |
1750 | } | |
1751 | ||
da9bb1d2 AC |
1752 | return 0; |
1753 | } | |
1754 | ||
1755 | /* | |
1756 | * edac_mc_init | |
1757 | * module initialization entry point | |
1758 | */ | |
1759 | static int __init edac_mc_init(void) | |
1760 | { | |
537fba28 | 1761 | edac_printk(KERN_INFO, EDAC_MC, EDAC_MC_VERSION "\n"); |
da9bb1d2 AC |
1762 | |
1763 | /* | |
1764 | * Harvest and clear any boot/initialization PCI parity errors | |
1765 | * | |
1766 | * FIXME: This only clears errors logged by devices present at time of | |
1767 | * module initialization. We should also do an initial clear | |
1768 | * of each newly hotplugged device. | |
1769 | */ | |
1770 | clear_pci_parity_errors(); | |
1771 | ||
7f927fcc | 1772 | /* Create the MC sysfs entries */ |
da9bb1d2 | 1773 | if (edac_sysfs_memctrl_setup()) { |
537fba28 DP |
1774 | edac_printk(KERN_ERR, EDAC_MC, |
1775 | "Error initializing sysfs code\n"); | |
da9bb1d2 AC |
1776 | return -ENODEV; |
1777 | } | |
1778 | ||
1779 | /* Create the PCI parity sysfs entries */ | |
1780 | if (edac_sysfs_pci_setup()) { | |
1781 | edac_sysfs_memctrl_teardown(); | |
537fba28 DP |
1782 | edac_printk(KERN_ERR, EDAC_MC, |
1783 | "EDAC PCI: Error initializing sysfs code\n"); | |
da9bb1d2 AC |
1784 | return -ENODEV; |
1785 | } | |
1786 | ||
da9bb1d2 | 1787 | /* create our kernel thread */ |
f2fe42ab | 1788 | edac_thread = kthread_run(edac_kernel_thread, NULL, "kedac"); |
e7ecd891 | 1789 | |
f2fe42ab | 1790 | if (IS_ERR(edac_thread)) { |
da9bb1d2 AC |
1791 | /* remove the sysfs entries */ |
1792 | edac_sysfs_memctrl_teardown(); | |
1793 | edac_sysfs_pci_teardown(); | |
f2fe42ab | 1794 | return PTR_ERR(edac_thread); |
da9bb1d2 AC |
1795 | } |
1796 | ||
da9bb1d2 AC |
1797 | return 0; |
1798 | } | |
1799 | ||
da9bb1d2 AC |
1800 | /* |
1801 | * edac_mc_exit() | |
1802 | * module exit/termination functioni | |
1803 | */ | |
1804 | static void __exit edac_mc_exit(void) | |
1805 | { | |
537fba28 | 1806 | debugf0("%s()\n", __func__); |
f2fe42ab | 1807 | kthread_stop(edac_thread); |
da9bb1d2 AC |
1808 | |
1809 | /* tear down the sysfs device */ | |
1810 | edac_sysfs_memctrl_teardown(); | |
1811 | edac_sysfs_pci_teardown(); | |
1812 | } | |
1813 | ||
da9bb1d2 AC |
1814 | module_init(edac_mc_init); |
1815 | module_exit(edac_mc_exit); | |
1816 | ||
1817 | MODULE_LICENSE("GPL"); | |
1818 | MODULE_AUTHOR("Linux Networx (http://lnxi.com) Thayne Harbaugh et al\n" | |
e7ecd891 | 1819 | "Based on work by Dan Hollis et al"); |
da9bb1d2 AC |
1820 | MODULE_DESCRIPTION("Core library routines for MC reporting"); |
1821 | ||
1822 | module_param(panic_on_ue, int, 0644); | |
1823 | MODULE_PARM_DESC(panic_on_ue, "Panic on uncorrected error: 0=off 1=on"); | |
37f04581 | 1824 | #ifdef CONFIG_PCI |
da9bb1d2 AC |
1825 | module_param(check_pci_parity, int, 0644); |
1826 | MODULE_PARM_DESC(check_pci_parity, "Check for PCI bus parity errors: 0=off 1=on"); | |
1827 | module_param(panic_on_pci_parity, int, 0644); | |
1828 | MODULE_PARM_DESC(panic_on_pci_parity, "Panic on PCI Bus Parity error: 0=off 1=on"); | |
37f04581 | 1829 | #endif |
da9bb1d2 AC |
1830 | module_param(log_ue, int, 0644); |
1831 | MODULE_PARM_DESC(log_ue, "Log uncorrectable error to console: 0=off 1=on"); | |
1832 | module_param(log_ce, int, 0644); | |
1833 | MODULE_PARM_DESC(log_ce, "Log correctable error to console: 0=off 1=on"); | |
1834 | module_param(poll_msec, int, 0644); | |
1835 | MODULE_PARM_DESC(poll_msec, "Polling period in milliseconds"); | |
1836 | #ifdef CONFIG_EDAC_DEBUG | |
1837 | module_param(edac_debug_level, int, 0644); | |
1838 | MODULE_PARM_DESC(edac_debug_level, "Debug level"); | |
1839 | #endif |