Commit | Line | Data |
---|---|---|
7c9281d7 DT |
1 | /* |
2 | * edac_mc kernel module | |
42a8e397 DT |
3 | * (C) 2005-2007 Linux Networx (http://lnxi.com) |
4 | * | |
7c9281d7 DT |
5 | * This file may be distributed under the terms of the |
6 | * GNU General Public License. | |
7 | * | |
42a8e397 | 8 | * Written Doug Thompson <norsk5@xmission.com> www.softwarebitmaker.com |
7c9281d7 DT |
9 | * |
10 | */ | |
11 | ||
7c9281d7 | 12 | #include <linux/ctype.h> |
8096cfaf | 13 | #include <linux/bug.h> |
7c9281d7 | 14 | |
20bcb7a8 | 15 | #include "edac_core.h" |
7c9281d7 DT |
16 | #include "edac_module.h" |
17 | ||
8096cfaf | 18 | |
7c9281d7 | 19 | /* MC EDAC Controls, setable by module parameter, and sysfs */ |
4de78c68 DJ |
20 | static int edac_mc_log_ue = 1; |
21 | static int edac_mc_log_ce = 1; | |
f044091c | 22 | static int edac_mc_panic_on_ue; |
4de78c68 | 23 | static int edac_mc_poll_msec = 1000; |
7c9281d7 DT |
24 | |
25 | /* Getter functions for above */ | |
4de78c68 | 26 | int edac_mc_get_log_ue(void) |
7c9281d7 | 27 | { |
4de78c68 | 28 | return edac_mc_log_ue; |
7c9281d7 DT |
29 | } |
30 | ||
4de78c68 | 31 | int edac_mc_get_log_ce(void) |
7c9281d7 | 32 | { |
4de78c68 | 33 | return edac_mc_log_ce; |
7c9281d7 DT |
34 | } |
35 | ||
4de78c68 | 36 | int edac_mc_get_panic_on_ue(void) |
7c9281d7 | 37 | { |
4de78c68 | 38 | return edac_mc_panic_on_ue; |
7c9281d7 DT |
39 | } |
40 | ||
81d87cb1 DJ |
41 | /* this is temporary */ |
42 | int edac_mc_get_poll_msec(void) | |
43 | { | |
4de78c68 | 44 | return edac_mc_poll_msec; |
7c9281d7 DT |
45 | } |
46 | ||
47 | /* Parameter declarations for above */ | |
4de78c68 DJ |
48 | module_param(edac_mc_panic_on_ue, int, 0644); |
49 | MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on"); | |
50 | module_param(edac_mc_log_ue, int, 0644); | |
51 | MODULE_PARM_DESC(edac_mc_log_ue, | |
079708b9 | 52 | "Log uncorrectable error to console: 0=off 1=on"); |
4de78c68 DJ |
53 | module_param(edac_mc_log_ce, int, 0644); |
54 | MODULE_PARM_DESC(edac_mc_log_ce, | |
079708b9 | 55 | "Log correctable error to console: 0=off 1=on"); |
4de78c68 DJ |
56 | module_param(edac_mc_poll_msec, int, 0644); |
57 | MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds"); | |
7c9281d7 | 58 | |
7c9281d7 DT |
59 | /* |
60 | * various constants for Memory Controllers | |
61 | */ | |
62 | static const char *mem_types[] = { | |
63 | [MEM_EMPTY] = "Empty", | |
64 | [MEM_RESERVED] = "Reserved", | |
65 | [MEM_UNKNOWN] = "Unknown", | |
66 | [MEM_FPM] = "FPM", | |
67 | [MEM_EDO] = "EDO", | |
68 | [MEM_BEDO] = "BEDO", | |
69 | [MEM_SDR] = "Unbuffered-SDR", | |
70 | [MEM_RDR] = "Registered-SDR", | |
71 | [MEM_DDR] = "Unbuffered-DDR", | |
72 | [MEM_RDDR] = "Registered-DDR", | |
1a9b85e6 DJ |
73 | [MEM_RMBS] = "RMBS", |
74 | [MEM_DDR2] = "Unbuffered-DDR2", | |
75 | [MEM_FB_DDR2] = "FullyBuffered-DDR2", | |
1d5f726c BH |
76 | [MEM_RDDR2] = "Registered-DDR2", |
77 | [MEM_XDR] = "XDR" | |
7c9281d7 DT |
78 | }; |
79 | ||
80 | static const char *dev_types[] = { | |
81 | [DEV_UNKNOWN] = "Unknown", | |
82 | [DEV_X1] = "x1", | |
83 | [DEV_X2] = "x2", | |
84 | [DEV_X4] = "x4", | |
85 | [DEV_X8] = "x8", | |
86 | [DEV_X16] = "x16", | |
87 | [DEV_X32] = "x32", | |
88 | [DEV_X64] = "x64" | |
89 | }; | |
90 | ||
91 | static const char *edac_caps[] = { | |
92 | [EDAC_UNKNOWN] = "Unknown", | |
93 | [EDAC_NONE] = "None", | |
94 | [EDAC_RESERVED] = "Reserved", | |
95 | [EDAC_PARITY] = "PARITY", | |
96 | [EDAC_EC] = "EC", | |
97 | [EDAC_SECDED] = "SECDED", | |
98 | [EDAC_S2ECD2ED] = "S2ECD2ED", | |
99 | [EDAC_S4ECD4ED] = "S4ECD4ED", | |
100 | [EDAC_S8ECD8ED] = "S8ECD8ED", | |
101 | [EDAC_S16ECD16ED] = "S16ECD16ED" | |
102 | }; | |
103 | ||
7c9281d7 | 104 | |
7c9281d7 DT |
105 | |
106 | /* | |
107 | * /sys/devices/system/edac/mc; | |
108 | * data structures and methods | |
109 | */ | |
110 | static ssize_t memctrl_int_show(void *ptr, char *buffer) | |
111 | { | |
079708b9 | 112 | int *value = (int *)ptr; |
7c9281d7 DT |
113 | return sprintf(buffer, "%u\n", *value); |
114 | } | |
115 | ||
116 | static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count) | |
117 | { | |
079708b9 | 118 | int *value = (int *)ptr; |
7c9281d7 DT |
119 | |
120 | if (isdigit(*buffer)) | |
121 | *value = simple_strtoul(buffer, NULL, 0); | |
122 | ||
123 | return count; | |
124 | } | |
125 | ||
bce19683 DT |
126 | /* |
127 | * mc poll_msec time value | |
128 | */ | |
129 | static ssize_t poll_msec_int_store(void *ptr, const char *buffer, size_t count) | |
130 | { | |
131 | int *value = (int *)ptr; | |
132 | ||
133 | if (isdigit(*buffer)) { | |
134 | *value = simple_strtoul(buffer, NULL, 0); | |
135 | ||
136 | /* notify edac_mc engine to reset the poll period */ | |
137 | edac_mc_reset_delay_period(*value); | |
138 | } | |
139 | ||
140 | return count; | |
141 | } | |
142 | ||
7c9281d7 | 143 | |
7c9281d7 DT |
144 | /* EDAC sysfs CSROW data structures and methods |
145 | */ | |
146 | ||
147 | /* Set of more default csrow<id> attribute show/store functions */ | |
e27e3dac | 148 | static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data, |
052dfb45 | 149 | int private) |
7c9281d7 | 150 | { |
079708b9 | 151 | return sprintf(data, "%u\n", csrow->ue_count); |
7c9281d7 DT |
152 | } |
153 | ||
e27e3dac | 154 | static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data, |
052dfb45 | 155 | int private) |
7c9281d7 | 156 | { |
079708b9 | 157 | return sprintf(data, "%u\n", csrow->ce_count); |
7c9281d7 DT |
158 | } |
159 | ||
e27e3dac | 160 | static ssize_t csrow_size_show(struct csrow_info *csrow, char *data, |
052dfb45 | 161 | int private) |
7c9281d7 | 162 | { |
079708b9 | 163 | return sprintf(data, "%u\n", PAGES_TO_MiB(csrow->nr_pages)); |
7c9281d7 DT |
164 | } |
165 | ||
e27e3dac | 166 | static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data, |
052dfb45 | 167 | int private) |
7c9281d7 | 168 | { |
079708b9 | 169 | return sprintf(data, "%s\n", mem_types[csrow->mtype]); |
7c9281d7 DT |
170 | } |
171 | ||
e27e3dac | 172 | static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data, |
052dfb45 | 173 | int private) |
7c9281d7 | 174 | { |
079708b9 | 175 | return sprintf(data, "%s\n", dev_types[csrow->dtype]); |
7c9281d7 DT |
176 | } |
177 | ||
e27e3dac | 178 | static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data, |
052dfb45 | 179 | int private) |
7c9281d7 | 180 | { |
079708b9 | 181 | return sprintf(data, "%s\n", edac_caps[csrow->edac_mode]); |
7c9281d7 DT |
182 | } |
183 | ||
184 | /* show/store functions for DIMM Label attributes */ | |
185 | static ssize_t channel_dimm_label_show(struct csrow_info *csrow, | |
052dfb45 | 186 | char *data, int channel) |
7c9281d7 | 187 | { |
079708b9 | 188 | return snprintf(data, EDAC_MC_LABEL_LEN, "%s", |
7c9281d7 DT |
189 | csrow->channels[channel].label); |
190 | } | |
191 | ||
192 | static ssize_t channel_dimm_label_store(struct csrow_info *csrow, | |
079708b9 DT |
193 | const char *data, |
194 | size_t count, int channel) | |
7c9281d7 DT |
195 | { |
196 | ssize_t max_size = 0; | |
197 | ||
079708b9 | 198 | max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1); |
7c9281d7 DT |
199 | strncpy(csrow->channels[channel].label, data, max_size); |
200 | csrow->channels[channel].label[max_size] = '\0'; | |
201 | ||
202 | return max_size; | |
203 | } | |
204 | ||
205 | /* show function for dynamic chX_ce_count attribute */ | |
206 | static ssize_t channel_ce_count_show(struct csrow_info *csrow, | |
052dfb45 | 207 | char *data, int channel) |
7c9281d7 DT |
208 | { |
209 | return sprintf(data, "%u\n", csrow->channels[channel].ce_count); | |
210 | } | |
211 | ||
212 | /* csrow specific attribute structure */ | |
213 | struct csrowdev_attribute { | |
214 | struct attribute attr; | |
079708b9 DT |
215 | ssize_t(*show) (struct csrow_info *, char *, int); |
216 | ssize_t(*store) (struct csrow_info *, const char *, size_t, int); | |
217 | int private; | |
7c9281d7 DT |
218 | }; |
219 | ||
220 | #define to_csrow(k) container_of(k, struct csrow_info, kobj) | |
221 | #define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr) | |
222 | ||
223 | /* Set of show/store higher level functions for default csrow attributes */ | |
224 | static ssize_t csrowdev_show(struct kobject *kobj, | |
052dfb45 | 225 | struct attribute *attr, char *buffer) |
7c9281d7 DT |
226 | { |
227 | struct csrow_info *csrow = to_csrow(kobj); | |
228 | struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr); | |
229 | ||
230 | if (csrowdev_attr->show) | |
231 | return csrowdev_attr->show(csrow, | |
052dfb45 | 232 | buffer, csrowdev_attr->private); |
7c9281d7 DT |
233 | return -EIO; |
234 | } | |
235 | ||
236 | static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr, | |
052dfb45 | 237 | const char *buffer, size_t count) |
7c9281d7 DT |
238 | { |
239 | struct csrow_info *csrow = to_csrow(kobj); | |
079708b9 | 240 | struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr); |
7c9281d7 DT |
241 | |
242 | if (csrowdev_attr->store) | |
243 | return csrowdev_attr->store(csrow, | |
052dfb45 DT |
244 | buffer, |
245 | count, csrowdev_attr->private); | |
7c9281d7 DT |
246 | return -EIO; |
247 | } | |
248 | ||
249 | static struct sysfs_ops csrowfs_ops = { | |
079708b9 DT |
250 | .show = csrowdev_show, |
251 | .store = csrowdev_store | |
7c9281d7 DT |
252 | }; |
253 | ||
254 | #define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \ | |
255 | static struct csrowdev_attribute attr_##_name = { \ | |
256 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
257 | .show = _show, \ | |
258 | .store = _store, \ | |
259 | .private = _private, \ | |
260 | }; | |
261 | ||
262 | /* default cwrow<id>/attribute files */ | |
079708b9 DT |
263 | CSROWDEV_ATTR(size_mb, S_IRUGO, csrow_size_show, NULL, 0); |
264 | CSROWDEV_ATTR(dev_type, S_IRUGO, csrow_dev_type_show, NULL, 0); | |
265 | CSROWDEV_ATTR(mem_type, S_IRUGO, csrow_mem_type_show, NULL, 0); | |
266 | CSROWDEV_ATTR(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL, 0); | |
267 | CSROWDEV_ATTR(ue_count, S_IRUGO, csrow_ue_count_show, NULL, 0); | |
268 | CSROWDEV_ATTR(ce_count, S_IRUGO, csrow_ce_count_show, NULL, 0); | |
7c9281d7 DT |
269 | |
270 | /* default attributes of the CSROW<id> object */ | |
271 | static struct csrowdev_attribute *default_csrow_attr[] = { | |
272 | &attr_dev_type, | |
273 | &attr_mem_type, | |
274 | &attr_edac_mode, | |
275 | &attr_size_mb, | |
276 | &attr_ue_count, | |
277 | &attr_ce_count, | |
278 | NULL, | |
279 | }; | |
280 | ||
7c9281d7 | 281 | /* possible dynamic channel DIMM Label attribute files */ |
079708b9 | 282 | CSROWDEV_ATTR(ch0_dimm_label, S_IRUGO | S_IWUSR, |
052dfb45 | 283 | channel_dimm_label_show, channel_dimm_label_store, 0); |
079708b9 | 284 | CSROWDEV_ATTR(ch1_dimm_label, S_IRUGO | S_IWUSR, |
052dfb45 | 285 | channel_dimm_label_show, channel_dimm_label_store, 1); |
079708b9 | 286 | CSROWDEV_ATTR(ch2_dimm_label, S_IRUGO | S_IWUSR, |
052dfb45 | 287 | channel_dimm_label_show, channel_dimm_label_store, 2); |
079708b9 | 288 | CSROWDEV_ATTR(ch3_dimm_label, S_IRUGO | S_IWUSR, |
052dfb45 | 289 | channel_dimm_label_show, channel_dimm_label_store, 3); |
079708b9 | 290 | CSROWDEV_ATTR(ch4_dimm_label, S_IRUGO | S_IWUSR, |
052dfb45 | 291 | channel_dimm_label_show, channel_dimm_label_store, 4); |
079708b9 | 292 | CSROWDEV_ATTR(ch5_dimm_label, S_IRUGO | S_IWUSR, |
052dfb45 | 293 | channel_dimm_label_show, channel_dimm_label_store, 5); |
7c9281d7 DT |
294 | |
295 | /* Total possible dynamic DIMM Label attribute file table */ | |
296 | static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = { | |
079708b9 DT |
297 | &attr_ch0_dimm_label, |
298 | &attr_ch1_dimm_label, | |
299 | &attr_ch2_dimm_label, | |
300 | &attr_ch3_dimm_label, | |
301 | &attr_ch4_dimm_label, | |
302 | &attr_ch5_dimm_label | |
7c9281d7 DT |
303 | }; |
304 | ||
305 | /* possible dynamic channel ce_count attribute files */ | |
079708b9 DT |
306 | CSROWDEV_ATTR(ch0_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 0); |
307 | CSROWDEV_ATTR(ch1_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 1); | |
308 | CSROWDEV_ATTR(ch2_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 2); | |
309 | CSROWDEV_ATTR(ch3_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 3); | |
310 | CSROWDEV_ATTR(ch4_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 4); | |
311 | CSROWDEV_ATTR(ch5_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 5); | |
7c9281d7 DT |
312 | |
313 | /* Total possible dynamic ce_count attribute file table */ | |
314 | static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = { | |
079708b9 DT |
315 | &attr_ch0_ce_count, |
316 | &attr_ch1_ce_count, | |
317 | &attr_ch2_ce_count, | |
318 | &attr_ch3_ce_count, | |
319 | &attr_ch4_ce_count, | |
320 | &attr_ch5_ce_count | |
7c9281d7 DT |
321 | }; |
322 | ||
7c9281d7 DT |
323 | #define EDAC_NR_CHANNELS 6 |
324 | ||
325 | /* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */ | |
326 | static int edac_create_channel_files(struct kobject *kobj, int chan) | |
327 | { | |
079708b9 | 328 | int err = -ENODEV; |
7c9281d7 DT |
329 | |
330 | if (chan >= EDAC_NR_CHANNELS) | |
331 | return err; | |
332 | ||
333 | /* create the DIMM label attribute file */ | |
334 | err = sysfs_create_file(kobj, | |
079708b9 DT |
335 | (struct attribute *) |
336 | dynamic_csrow_dimm_attr[chan]); | |
7c9281d7 DT |
337 | |
338 | if (!err) { | |
339 | /* create the CE Count attribute file */ | |
340 | err = sysfs_create_file(kobj, | |
079708b9 DT |
341 | (struct attribute *) |
342 | dynamic_csrow_ce_count_attr[chan]); | |
7c9281d7 | 343 | } else { |
e27e3dac DT |
344 | debugf1("%s() dimm labels and ce_count files created", |
345 | __func__); | |
7c9281d7 DT |
346 | } |
347 | ||
348 | return err; | |
349 | } | |
350 | ||
351 | /* No memory to release for this kobj */ | |
352 | static void edac_csrow_instance_release(struct kobject *kobj) | |
353 | { | |
8096cfaf | 354 | struct mem_ctl_info *mci; |
7c9281d7 DT |
355 | struct csrow_info *cs; |
356 | ||
8096cfaf DT |
357 | debugf1("%s()\n", __func__); |
358 | ||
7c9281d7 | 359 | cs = container_of(kobj, struct csrow_info, kobj); |
8096cfaf DT |
360 | mci = cs->mci; |
361 | ||
362 | kobject_put(&mci->edac_mci_kobj); | |
7c9281d7 DT |
363 | } |
364 | ||
365 | /* the kobj_type instance for a CSROW */ | |
366 | static struct kobj_type ktype_csrow = { | |
367 | .release = edac_csrow_instance_release, | |
368 | .sysfs_ops = &csrowfs_ops, | |
079708b9 | 369 | .default_attrs = (struct attribute **)default_csrow_attr, |
7c9281d7 DT |
370 | }; |
371 | ||
372 | /* Create a CSROW object under specifed edac_mc_device */ | |
8096cfaf DT |
373 | static int edac_create_csrow_object(struct mem_ctl_info *mci, |
374 | struct csrow_info *csrow, int index) | |
7c9281d7 | 375 | { |
8096cfaf DT |
376 | struct kobject *kobj_mci = &mci->edac_mci_kobj; |
377 | struct kobject *kobj; | |
7c9281d7 | 378 | int chan; |
8096cfaf | 379 | int err; |
7c9281d7 DT |
380 | |
381 | /* generate ..../edac/mc/mc<id>/csrow<index> */ | |
8096cfaf DT |
382 | memset(&csrow->kobj, 0, sizeof(csrow->kobj)); |
383 | csrow->mci = mci; /* include container up link */ | |
8096cfaf DT |
384 | |
385 | /* bump the mci instance's kobject's ref count */ | |
386 | kobj = kobject_get(&mci->edac_mci_kobj); | |
387 | if (!kobj) { | |
388 | err = -ENODEV; | |
389 | goto err_out; | |
390 | } | |
7c9281d7 DT |
391 | |
392 | /* Instanstiate the csrow object */ | |
b2ed215a GKH |
393 | err = kobject_init_and_add(&csrow->kobj, &ktype_csrow, kobj_mci, |
394 | "csrow%d", index); | |
8096cfaf DT |
395 | if (err) |
396 | goto err_release_top_kobj; | |
397 | ||
398 | /* At this point, to release a csrow kobj, one must | |
c10997f6 | 399 | * call the kobject_put and allow that tear down |
8096cfaf DT |
400 | * to work the releasing |
401 | */ | |
402 | ||
403 | /* Create the dyanmic attribute files on this csrow, | |
404 | * namely, the DIMM labels and the channel ce_count | |
405 | */ | |
406 | for (chan = 0; chan < csrow->nr_channels; chan++) { | |
407 | err = edac_create_channel_files(&csrow->kobj, chan); | |
408 | if (err) { | |
409 | /* special case the unregister here */ | |
c10997f6 | 410 | kobject_put(&csrow->kobj); |
8096cfaf | 411 | goto err_out; |
7c9281d7 DT |
412 | } |
413 | } | |
b2ed215a | 414 | kobject_uevent(&csrow->kobj, KOBJ_ADD); |
8096cfaf DT |
415 | return 0; |
416 | ||
417 | /* error unwind stack */ | |
418 | err_release_top_kobj: | |
419 | kobject_put(&mci->edac_mci_kobj); | |
420 | ||
421 | err_out: | |
7c9281d7 DT |
422 | return err; |
423 | } | |
424 | ||
425 | /* default sysfs methods and data structures for the main MCI kobject */ | |
426 | ||
427 | static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci, | |
079708b9 | 428 | const char *data, size_t count) |
7c9281d7 DT |
429 | { |
430 | int row, chan; | |
431 | ||
432 | mci->ue_noinfo_count = 0; | |
433 | mci->ce_noinfo_count = 0; | |
434 | mci->ue_count = 0; | |
435 | mci->ce_count = 0; | |
436 | ||
437 | for (row = 0; row < mci->nr_csrows; row++) { | |
438 | struct csrow_info *ri = &mci->csrows[row]; | |
439 | ||
440 | ri->ue_count = 0; | |
441 | ri->ce_count = 0; | |
442 | ||
443 | for (chan = 0; chan < ri->nr_channels; chan++) | |
444 | ri->channels[chan].ce_count = 0; | |
445 | } | |
446 | ||
447 | mci->start_time = jiffies; | |
448 | return count; | |
449 | } | |
450 | ||
451 | /* memory scrubbing */ | |
452 | static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci, | |
052dfb45 | 453 | const char *data, size_t count) |
7c9281d7 DT |
454 | { |
455 | u32 bandwidth = -1; | |
456 | ||
457 | if (mci->set_sdram_scrub_rate) { | |
458 | ||
459 | memctrl_int_store(&bandwidth, data, count); | |
460 | ||
079708b9 | 461 | if (!(*mci->set_sdram_scrub_rate) (mci, &bandwidth)) { |
7c9281d7 | 462 | edac_printk(KERN_DEBUG, EDAC_MC, |
052dfb45 DT |
463 | "Scrub rate set successfully, applied: %d\n", |
464 | bandwidth); | |
7c9281d7 DT |
465 | } else { |
466 | /* FIXME: error codes maybe? */ | |
467 | edac_printk(KERN_DEBUG, EDAC_MC, | |
052dfb45 DT |
468 | "Scrub rate set FAILED, could not apply: %d\n", |
469 | bandwidth); | |
7c9281d7 DT |
470 | } |
471 | } else { | |
472 | /* FIXME: produce "not implemented" ERROR for user-side. */ | |
473 | edac_printk(KERN_WARNING, EDAC_MC, | |
052dfb45 | 474 | "Memory scrubbing 'set'control is not implemented!\n"); |
7c9281d7 DT |
475 | } |
476 | return count; | |
477 | } | |
478 | ||
479 | static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data) | |
480 | { | |
481 | u32 bandwidth = -1; | |
482 | ||
483 | if (mci->get_sdram_scrub_rate) { | |
079708b9 | 484 | if (!(*mci->get_sdram_scrub_rate) (mci, &bandwidth)) { |
7c9281d7 | 485 | edac_printk(KERN_DEBUG, EDAC_MC, |
052dfb45 DT |
486 | "Scrub rate successfully, fetched: %d\n", |
487 | bandwidth); | |
7c9281d7 DT |
488 | } else { |
489 | /* FIXME: error codes maybe? */ | |
490 | edac_printk(KERN_DEBUG, EDAC_MC, | |
052dfb45 DT |
491 | "Scrub rate fetch FAILED, got: %d\n", |
492 | bandwidth); | |
7c9281d7 DT |
493 | } |
494 | } else { | |
495 | /* FIXME: produce "not implemented" ERROR for user-side. */ | |
496 | edac_printk(KERN_WARNING, EDAC_MC, | |
052dfb45 | 497 | "Memory scrubbing 'get' control is not implemented\n"); |
7c9281d7 DT |
498 | } |
499 | return sprintf(data, "%d\n", bandwidth); | |
500 | } | |
501 | ||
502 | /* default attribute files for the MCI object */ | |
503 | static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data) | |
504 | { | |
079708b9 | 505 | return sprintf(data, "%d\n", mci->ue_count); |
7c9281d7 DT |
506 | } |
507 | ||
508 | static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data) | |
509 | { | |
079708b9 | 510 | return sprintf(data, "%d\n", mci->ce_count); |
7c9281d7 DT |
511 | } |
512 | ||
513 | static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data) | |
514 | { | |
079708b9 | 515 | return sprintf(data, "%d\n", mci->ce_noinfo_count); |
7c9281d7 DT |
516 | } |
517 | ||
518 | static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data) | |
519 | { | |
079708b9 | 520 | return sprintf(data, "%d\n", mci->ue_noinfo_count); |
7c9281d7 DT |
521 | } |
522 | ||
523 | static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data) | |
524 | { | |
079708b9 | 525 | return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ); |
7c9281d7 DT |
526 | } |
527 | ||
528 | static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data) | |
529 | { | |
079708b9 | 530 | return sprintf(data, "%s\n", mci->ctl_name); |
7c9281d7 DT |
531 | } |
532 | ||
533 | static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data) | |
534 | { | |
535 | int total_pages, csrow_idx; | |
536 | ||
537 | for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows; | |
052dfb45 | 538 | csrow_idx++) { |
7c9281d7 DT |
539 | struct csrow_info *csrow = &mci->csrows[csrow_idx]; |
540 | ||
541 | if (!csrow->nr_pages) | |
542 | continue; | |
543 | ||
544 | total_pages += csrow->nr_pages; | |
545 | } | |
546 | ||
079708b9 | 547 | return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages)); |
7c9281d7 DT |
548 | } |
549 | ||
7c9281d7 | 550 | #define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj) |
42a8e397 | 551 | #define to_mcidev_attr(a) container_of(a,struct mcidev_sysfs_attribute,attr) |
7c9281d7 DT |
552 | |
553 | /* MCI show/store functions for top most object */ | |
554 | static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr, | |
052dfb45 | 555 | char *buffer) |
7c9281d7 DT |
556 | { |
557 | struct mem_ctl_info *mem_ctl_info = to_mci(kobj); | |
42a8e397 | 558 | struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr); |
7c9281d7 DT |
559 | |
560 | if (mcidev_attr->show) | |
561 | return mcidev_attr->show(mem_ctl_info, buffer); | |
562 | ||
563 | return -EIO; | |
564 | } | |
565 | ||
566 | static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr, | |
052dfb45 | 567 | const char *buffer, size_t count) |
7c9281d7 DT |
568 | { |
569 | struct mem_ctl_info *mem_ctl_info = to_mci(kobj); | |
42a8e397 | 570 | struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr); |
7c9281d7 DT |
571 | |
572 | if (mcidev_attr->store) | |
573 | return mcidev_attr->store(mem_ctl_info, buffer, count); | |
574 | ||
575 | return -EIO; | |
576 | } | |
577 | ||
8096cfaf | 578 | /* Intermediate show/store table */ |
7c9281d7 DT |
579 | static struct sysfs_ops mci_ops = { |
580 | .show = mcidev_show, | |
581 | .store = mcidev_store | |
582 | }; | |
583 | ||
584 | #define MCIDEV_ATTR(_name,_mode,_show,_store) \ | |
42a8e397 | 585 | static struct mcidev_sysfs_attribute mci_attr_##_name = { \ |
7c9281d7 DT |
586 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
587 | .show = _show, \ | |
588 | .store = _store, \ | |
589 | }; | |
590 | ||
591 | /* default Control file */ | |
079708b9 | 592 | MCIDEV_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store); |
7c9281d7 DT |
593 | |
594 | /* default Attribute files */ | |
079708b9 DT |
595 | MCIDEV_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL); |
596 | MCIDEV_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL); | |
597 | MCIDEV_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL); | |
598 | MCIDEV_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL); | |
599 | MCIDEV_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL); | |
600 | MCIDEV_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL); | |
601 | MCIDEV_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL); | |
7c9281d7 DT |
602 | |
603 | /* memory scrubber attribute file */ | |
079708b9 | 604 | MCIDEV_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show, |
052dfb45 | 605 | mci_sdram_scrub_rate_store); |
7c9281d7 | 606 | |
42a8e397 | 607 | static struct mcidev_sysfs_attribute *mci_attr[] = { |
7c9281d7 DT |
608 | &mci_attr_reset_counters, |
609 | &mci_attr_mc_name, | |
610 | &mci_attr_size_mb, | |
611 | &mci_attr_seconds_since_reset, | |
612 | &mci_attr_ue_noinfo_count, | |
613 | &mci_attr_ce_noinfo_count, | |
614 | &mci_attr_ue_count, | |
615 | &mci_attr_ce_count, | |
616 | &mci_attr_sdram_scrub_rate, | |
617 | NULL | |
618 | }; | |
619 | ||
8096cfaf | 620 | |
7c9281d7 DT |
621 | /* |
622 | * Release of a MC controlling instance | |
8096cfaf DT |
623 | * |
624 | * each MC control instance has the following resources upon entry: | |
625 | * a) a ref count on the top memctl kobj | |
626 | * b) a ref count on this module | |
627 | * | |
628 | * this function must decrement those ref counts and then | |
629 | * issue a free on the instance's memory | |
7c9281d7 | 630 | */ |
8096cfaf | 631 | static void edac_mci_control_release(struct kobject *kobj) |
7c9281d7 DT |
632 | { |
633 | struct mem_ctl_info *mci; | |
634 | ||
635 | mci = to_mci(kobj); | |
8096cfaf DT |
636 | |
637 | debugf0("%s() mci instance idx=%d releasing\n", __func__, mci->mc_idx); | |
638 | ||
639 | /* decrement the module ref count */ | |
640 | module_put(mci->owner); | |
641 | ||
642 | /* free the mci instance memory here */ | |
643 | kfree(mci); | |
7c9281d7 DT |
644 | } |
645 | ||
646 | static struct kobj_type ktype_mci = { | |
8096cfaf | 647 | .release = edac_mci_control_release, |
7c9281d7 | 648 | .sysfs_ops = &mci_ops, |
079708b9 | 649 | .default_attrs = (struct attribute **)mci_attr, |
7c9281d7 DT |
650 | }; |
651 | ||
8096cfaf DT |
652 | /* show/store, tables, etc for the MC kset */ |
653 | ||
654 | ||
655 | struct memctrl_dev_attribute { | |
656 | struct attribute attr; | |
657 | void *value; | |
658 | ssize_t(*show) (void *, char *); | |
659 | ssize_t(*store) (void *, const char *, size_t); | |
660 | }; | |
661 | ||
662 | /* Set of show/store abstract level functions for memory control object */ | |
663 | static ssize_t memctrl_dev_show(struct kobject *kobj, | |
664 | struct attribute *attr, char *buffer) | |
665 | { | |
666 | struct memctrl_dev_attribute *memctrl_dev; | |
667 | memctrl_dev = (struct memctrl_dev_attribute *)attr; | |
668 | ||
669 | if (memctrl_dev->show) | |
670 | return memctrl_dev->show(memctrl_dev->value, buffer); | |
671 | ||
672 | return -EIO; | |
673 | } | |
674 | ||
675 | static ssize_t memctrl_dev_store(struct kobject *kobj, struct attribute *attr, | |
676 | const char *buffer, size_t count) | |
677 | { | |
678 | struct memctrl_dev_attribute *memctrl_dev; | |
679 | memctrl_dev = (struct memctrl_dev_attribute *)attr; | |
680 | ||
681 | if (memctrl_dev->store) | |
682 | return memctrl_dev->store(memctrl_dev->value, buffer, count); | |
683 | ||
684 | return -EIO; | |
685 | } | |
686 | ||
687 | static struct sysfs_ops memctrlfs_ops = { | |
688 | .show = memctrl_dev_show, | |
689 | .store = memctrl_dev_store | |
690 | }; | |
691 | ||
692 | #define MEMCTRL_ATTR(_name, _mode, _show, _store) \ | |
693 | static struct memctrl_dev_attribute attr_##_name = { \ | |
694 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
695 | .value = &_name, \ | |
696 | .show = _show, \ | |
697 | .store = _store, \ | |
698 | }; | |
699 | ||
700 | #define MEMCTRL_STRING_ATTR(_name, _data, _mode, _show, _store) \ | |
701 | static struct memctrl_dev_attribute attr_##_name = { \ | |
702 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
703 | .value = _data, \ | |
704 | .show = _show, \ | |
705 | .store = _store, \ | |
706 | }; | |
707 | ||
708 | /* csrow<id> control files */ | |
709 | MEMCTRL_ATTR(edac_mc_panic_on_ue, | |
710 | S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store); | |
711 | ||
712 | MEMCTRL_ATTR(edac_mc_log_ue, | |
713 | S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store); | |
714 | ||
715 | MEMCTRL_ATTR(edac_mc_log_ce, | |
716 | S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store); | |
717 | ||
718 | MEMCTRL_ATTR(edac_mc_poll_msec, | |
bce19683 | 719 | S_IRUGO | S_IWUSR, memctrl_int_show, poll_msec_int_store); |
8096cfaf DT |
720 | |
721 | /* Base Attributes of the memory ECC object */ | |
722 | static struct memctrl_dev_attribute *memctrl_attr[] = { | |
723 | &attr_edac_mc_panic_on_ue, | |
724 | &attr_edac_mc_log_ue, | |
725 | &attr_edac_mc_log_ce, | |
726 | &attr_edac_mc_poll_msec, | |
727 | NULL, | |
728 | }; | |
729 | ||
730 | ||
731 | /* the ktype for the mc_kset internal kobj */ | |
732 | static struct kobj_type ktype_mc_set_attribs = { | |
733 | .sysfs_ops = &memctrlfs_ops, | |
734 | .default_attrs = (struct attribute **)memctrl_attr, | |
735 | }; | |
736 | ||
737 | /* EDAC memory controller sysfs kset: | |
738 | * /sys/devices/system/edac/mc | |
739 | */ | |
740 | static struct kset mc_kset = { | |
34980ca8 | 741 | .kobj = {.ktype = &ktype_mc_set_attribs }, |
8096cfaf DT |
742 | }; |
743 | ||
744 | ||
745 | /* | |
746 | * edac_mc_register_sysfs_main_kobj | |
747 | * | |
748 | * setups and registers the main kobject for each mci | |
749 | */ | |
750 | int edac_mc_register_sysfs_main_kobj(struct mem_ctl_info *mci) | |
751 | { | |
752 | struct kobject *kobj_mci; | |
753 | int err; | |
754 | ||
755 | debugf1("%s()\n", __func__); | |
756 | ||
757 | kobj_mci = &mci->edac_mci_kobj; | |
758 | ||
759 | /* Init the mci's kobject */ | |
760 | memset(kobj_mci, 0, sizeof(*kobj_mci)); | |
761 | ||
8096cfaf DT |
762 | /* Record which module 'owns' this control structure |
763 | * and bump the ref count of the module | |
764 | */ | |
765 | mci->owner = THIS_MODULE; | |
766 | ||
767 | /* bump ref count on this module */ | |
768 | if (!try_module_get(mci->owner)) { | |
769 | err = -ENODEV; | |
770 | goto fail_out; | |
771 | } | |
772 | ||
b2ed215a GKH |
773 | /* this instance become part of the mc_kset */ |
774 | kobj_mci->kset = &mc_kset; | |
775 | ||
8096cfaf | 776 | /* register the mc<id> kobject to the mc_kset */ |
b2ed215a GKH |
777 | err = kobject_init_and_add(kobj_mci, &ktype_mci, NULL, |
778 | "mc%d", mci->mc_idx); | |
8096cfaf DT |
779 | if (err) { |
780 | debugf1("%s()Failed to register '.../edac/mc%d'\n", | |
781 | __func__, mci->mc_idx); | |
782 | goto kobj_reg_fail; | |
783 | } | |
b2ed215a | 784 | kobject_uevent(kobj_mci, KOBJ_ADD); |
8096cfaf DT |
785 | |
786 | /* At this point, to 'free' the control struct, | |
787 | * edac_mc_unregister_sysfs_main_kobj() must be used | |
788 | */ | |
789 | ||
790 | debugf1("%s() Registered '.../edac/mc%d' kobject\n", | |
791 | __func__, mci->mc_idx); | |
792 | ||
793 | return 0; | |
794 | ||
795 | /* Error exit stack */ | |
796 | ||
797 | kobj_reg_fail: | |
798 | module_put(mci->owner); | |
799 | ||
800 | fail_out: | |
801 | return err; | |
802 | } | |
803 | ||
804 | /* | |
805 | * edac_mc_register_sysfs_main_kobj | |
806 | * | |
807 | * tears down and the main mci kobject from the mc_kset | |
808 | */ | |
809 | void edac_mc_unregister_sysfs_main_kobj(struct mem_ctl_info *mci) | |
810 | { | |
811 | /* delete the kobj from the mc_kset */ | |
c10997f6 | 812 | kobject_put(&mci->edac_mci_kobj); |
8096cfaf DT |
813 | } |
814 | ||
7c9281d7 DT |
815 | #define EDAC_DEVICE_SYMLINK "device" |
816 | ||
42a8e397 | 817 | /* |
8096cfaf | 818 | * edac_create_mci_instance_attributes |
42a8e397 DT |
819 | * create MC driver specific attributes at the topmost level |
820 | * directory of this mci instance. | |
821 | */ | |
8096cfaf | 822 | static int edac_create_mci_instance_attributes(struct mem_ctl_info *mci) |
42a8e397 DT |
823 | { |
824 | int err; | |
825 | struct mcidev_sysfs_attribute *sysfs_attrib; | |
826 | ||
827 | /* point to the start of the array and iterate over it | |
828 | * adding each attribute listed to this mci instance's kobject | |
829 | */ | |
830 | sysfs_attrib = mci->mc_driver_sysfs_attributes; | |
831 | ||
8096cfaf | 832 | while (sysfs_attrib && sysfs_attrib->attr.name) { |
42a8e397 DT |
833 | err = sysfs_create_file(&mci->edac_mci_kobj, |
834 | (struct attribute*) sysfs_attrib); | |
835 | if (err) { | |
836 | return err; | |
837 | } | |
838 | ||
839 | sysfs_attrib++; | |
840 | } | |
841 | ||
842 | return 0; | |
843 | } | |
844 | ||
8096cfaf DT |
845 | /* |
846 | * edac_remove_mci_instance_attributes | |
847 | * remove MC driver specific attributes at the topmost level | |
848 | * directory of this mci instance. | |
849 | */ | |
850 | static void edac_remove_mci_instance_attributes(struct mem_ctl_info *mci) | |
851 | { | |
852 | struct mcidev_sysfs_attribute *sysfs_attrib; | |
853 | ||
854 | /* point to the start of the array and iterate over it | |
855 | * adding each attribute listed to this mci instance's kobject | |
856 | */ | |
857 | sysfs_attrib = mci->mc_driver_sysfs_attributes; | |
858 | ||
859 | /* loop if there are attributes and until we hit a NULL entry */ | |
860 | while (sysfs_attrib && sysfs_attrib->attr.name) { | |
861 | sysfs_remove_file(&mci->edac_mci_kobj, | |
862 | (struct attribute *) sysfs_attrib); | |
863 | sysfs_attrib++; | |
864 | } | |
865 | } | |
866 | ||
867 | ||
7c9281d7 DT |
868 | /* |
869 | * Create a new Memory Controller kobject instance, | |
870 | * mc<id> under the 'mc' directory | |
871 | * | |
872 | * Return: | |
873 | * 0 Success | |
874 | * !0 Failure | |
875 | */ | |
876 | int edac_create_sysfs_mci_device(struct mem_ctl_info *mci) | |
877 | { | |
878 | int i; | |
879 | int err; | |
880 | struct csrow_info *csrow; | |
8096cfaf | 881 | struct kobject *kobj_mci = &mci->edac_mci_kobj; |
7c9281d7 DT |
882 | |
883 | debugf0("%s() idx=%d\n", __func__, mci->mc_idx); | |
7c9281d7 DT |
884 | |
885 | /* create a symlink for the device */ | |
8096cfaf | 886 | err = sysfs_create_link(kobj_mci, &mci->dev->kobj, |
7c9281d7 | 887 | EDAC_DEVICE_SYMLINK); |
8096cfaf DT |
888 | if (err) { |
889 | debugf1("%s() failure to create symlink\n", __func__); | |
7c9281d7 | 890 | goto fail0; |
8096cfaf | 891 | } |
7c9281d7 | 892 | |
42a8e397 DT |
893 | /* If the low level driver desires some attributes, |
894 | * then create them now for the driver. | |
895 | */ | |
896 | if (mci->mc_driver_sysfs_attributes) { | |
8096cfaf DT |
897 | err = edac_create_mci_instance_attributes(mci); |
898 | if (err) { | |
899 | debugf1("%s() failure to create mci attributes\n", | |
900 | __func__); | |
42a8e397 | 901 | goto fail0; |
8096cfaf | 902 | } |
42a8e397 DT |
903 | } |
904 | ||
8096cfaf | 905 | /* Make directories for each CSROW object under the mc<id> kobject |
7c9281d7 DT |
906 | */ |
907 | for (i = 0; i < mci->nr_csrows; i++) { | |
908 | csrow = &mci->csrows[i]; | |
909 | ||
910 | /* Only expose populated CSROWs */ | |
911 | if (csrow->nr_pages > 0) { | |
8096cfaf DT |
912 | err = edac_create_csrow_object(mci, csrow, i); |
913 | if (err) { | |
914 | debugf1("%s() failure: create csrow %d obj\n", | |
915 | __func__, i); | |
7c9281d7 | 916 | goto fail1; |
8096cfaf | 917 | } |
7c9281d7 DT |
918 | } |
919 | } | |
920 | ||
921 | return 0; | |
922 | ||
923 | /* CSROW error: backout what has already been registered, */ | |
052dfb45 | 924 | fail1: |
079708b9 | 925 | for (i--; i >= 0; i--) { |
7c9281d7 | 926 | if (csrow->nr_pages > 0) { |
c10997f6 | 927 | kobject_put(&mci->csrows[i].kobj); |
7c9281d7 DT |
928 | } |
929 | } | |
930 | ||
8096cfaf DT |
931 | /* remove the mci instance's attributes, if any */ |
932 | edac_remove_mci_instance_attributes(mci); | |
933 | ||
934 | /* remove the symlink */ | |
935 | sysfs_remove_link(kobj_mci, EDAC_DEVICE_SYMLINK); | |
936 | ||
052dfb45 | 937 | fail0: |
7c9281d7 DT |
938 | return err; |
939 | } | |
940 | ||
941 | /* | |
942 | * remove a Memory Controller instance | |
943 | */ | |
944 | void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci) | |
945 | { | |
946 | int i; | |
947 | ||
948 | debugf0("%s()\n", __func__); | |
949 | ||
950 | /* remove all csrow kobjects */ | |
951 | for (i = 0; i < mci->nr_csrows; i++) { | |
952 | if (mci->csrows[i].nr_pages > 0) { | |
8096cfaf | 953 | debugf0("%s() unreg csrow-%d\n", __func__, i); |
c10997f6 | 954 | kobject_put(&mci->csrows[i].kobj); |
7c9281d7 DT |
955 | } |
956 | } | |
957 | ||
8096cfaf DT |
958 | debugf0("%s() remove_link\n", __func__); |
959 | ||
960 | /* remove the symlink */ | |
7c9281d7 | 961 | sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK); |
8096cfaf DT |
962 | |
963 | debugf0("%s() remove_mci_instance\n", __func__); | |
964 | ||
965 | /* remove this mci instance's attribtes */ | |
966 | edac_remove_mci_instance_attributes(mci); | |
967 | ||
968 | debugf0("%s() unregister this mci kobj\n", __func__); | |
969 | ||
970 | /* unregister this instance's kobject */ | |
c10997f6 | 971 | kobject_put(&mci->edac_mci_kobj); |
7c9281d7 | 972 | } |
8096cfaf DT |
973 | |
974 | ||
975 | ||
976 | ||
977 | /* | |
978 | * edac_setup_sysfs_mc_kset(void) | |
979 | * | |
980 | * Initialize the mc_kset for the 'mc' entry | |
981 | * This requires creating the top 'mc' directory with a kset | |
982 | * and its controls/attributes. | |
983 | * | |
984 | * To this 'mc' kset, instance 'mci' will be grouped as children. | |
985 | * | |
986 | * Return: 0 SUCCESS | |
987 | * !0 FAILURE error code | |
988 | */ | |
989 | int edac_sysfs_setup_mc_kset(void) | |
990 | { | |
991 | int err = 0; | |
992 | struct sysdev_class *edac_class; | |
993 | ||
994 | debugf1("%s()\n", __func__); | |
995 | ||
996 | /* get the /sys/devices/system/edac class reference */ | |
997 | edac_class = edac_get_edac_class(); | |
998 | if (edac_class == NULL) { | |
999 | debugf1("%s() no edac_class error=%d\n", __func__, err); | |
1000 | goto fail_out; | |
1001 | } | |
1002 | ||
1003 | /* Init the MC's kobject */ | |
34980ca8 | 1004 | kobject_set_name(&mc_kset.kobj, "mc"); |
8096cfaf DT |
1005 | mc_kset.kobj.parent = &edac_class->kset.kobj; |
1006 | ||
1007 | /* register the mc_kset */ | |
1008 | err = kset_register(&mc_kset); | |
1009 | if (err) { | |
1010 | debugf1("%s() Failed to register '.../edac/mc'\n", __func__); | |
1011 | goto fail_out; | |
1012 | } | |
1013 | ||
1014 | debugf1("%s() Registered '.../edac/mc' kobject\n", __func__); | |
1015 | ||
1016 | return 0; | |
1017 | ||
1018 | ||
1019 | /* error unwind stack */ | |
1020 | fail_out: | |
1021 | return err; | |
1022 | } | |
1023 | ||
1024 | /* | |
1025 | * edac_sysfs_teardown_mc_kset | |
1026 | * | |
1027 | * deconstruct the mc_ket for memory controllers | |
1028 | */ | |
1029 | void edac_sysfs_teardown_mc_kset(void) | |
1030 | { | |
1031 | kset_unregister(&mc_kset); | |
1032 | } | |
1033 |