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 | ||
096846e2 AJ |
47 | static int edac_set_poll_msec(const char *val, struct kernel_param *kp) |
48 | { | |
49 | long l; | |
50 | int ret; | |
51 | ||
52 | if (!val) | |
53 | return -EINVAL; | |
54 | ||
55 | ret = strict_strtol(val, 0, &l); | |
56 | if (ret == -EINVAL || ((int)l != l)) | |
57 | return -EINVAL; | |
58 | *((int *)kp->arg) = l; | |
59 | ||
60 | /* notify edac_mc engine to reset the poll period */ | |
61 | edac_mc_reset_delay_period(l); | |
62 | ||
63 | return 0; | |
64 | } | |
65 | ||
7c9281d7 | 66 | /* Parameter declarations for above */ |
4de78c68 DJ |
67 | module_param(edac_mc_panic_on_ue, int, 0644); |
68 | MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on"); | |
69 | module_param(edac_mc_log_ue, int, 0644); | |
70 | MODULE_PARM_DESC(edac_mc_log_ue, | |
079708b9 | 71 | "Log uncorrectable error to console: 0=off 1=on"); |
4de78c68 DJ |
72 | module_param(edac_mc_log_ce, int, 0644); |
73 | MODULE_PARM_DESC(edac_mc_log_ce, | |
079708b9 | 74 | "Log correctable error to console: 0=off 1=on"); |
096846e2 AJ |
75 | module_param_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_int, |
76 | &edac_mc_poll_msec, 0644); | |
4de78c68 | 77 | MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds"); |
7c9281d7 | 78 | |
7c9281d7 DT |
79 | /* |
80 | * various constants for Memory Controllers | |
81 | */ | |
82 | static const char *mem_types[] = { | |
83 | [MEM_EMPTY] = "Empty", | |
84 | [MEM_RESERVED] = "Reserved", | |
85 | [MEM_UNKNOWN] = "Unknown", | |
86 | [MEM_FPM] = "FPM", | |
87 | [MEM_EDO] = "EDO", | |
88 | [MEM_BEDO] = "BEDO", | |
89 | [MEM_SDR] = "Unbuffered-SDR", | |
90 | [MEM_RDR] = "Registered-SDR", | |
91 | [MEM_DDR] = "Unbuffered-DDR", | |
92 | [MEM_RDDR] = "Registered-DDR", | |
1a9b85e6 DJ |
93 | [MEM_RMBS] = "RMBS", |
94 | [MEM_DDR2] = "Unbuffered-DDR2", | |
95 | [MEM_FB_DDR2] = "FullyBuffered-DDR2", | |
1d5f726c BH |
96 | [MEM_RDDR2] = "Registered-DDR2", |
97 | [MEM_XDR] = "XDR" | |
7c9281d7 DT |
98 | }; |
99 | ||
100 | static const char *dev_types[] = { | |
101 | [DEV_UNKNOWN] = "Unknown", | |
102 | [DEV_X1] = "x1", | |
103 | [DEV_X2] = "x2", | |
104 | [DEV_X4] = "x4", | |
105 | [DEV_X8] = "x8", | |
106 | [DEV_X16] = "x16", | |
107 | [DEV_X32] = "x32", | |
108 | [DEV_X64] = "x64" | |
109 | }; | |
110 | ||
111 | static const char *edac_caps[] = { | |
112 | [EDAC_UNKNOWN] = "Unknown", | |
113 | [EDAC_NONE] = "None", | |
114 | [EDAC_RESERVED] = "Reserved", | |
115 | [EDAC_PARITY] = "PARITY", | |
116 | [EDAC_EC] = "EC", | |
117 | [EDAC_SECDED] = "SECDED", | |
118 | [EDAC_S2ECD2ED] = "S2ECD2ED", | |
119 | [EDAC_S4ECD4ED] = "S4ECD4ED", | |
120 | [EDAC_S8ECD8ED] = "S8ECD8ED", | |
121 | [EDAC_S16ECD16ED] = "S16ECD16ED" | |
122 | }; | |
123 | ||
7c9281d7 | 124 | |
7c9281d7 | 125 | |
7c9281d7 DT |
126 | static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count) |
127 | { | |
079708b9 | 128 | int *value = (int *)ptr; |
7c9281d7 DT |
129 | |
130 | if (isdigit(*buffer)) | |
131 | *value = simple_strtoul(buffer, NULL, 0); | |
132 | ||
133 | return count; | |
134 | } | |
135 | ||
7c9281d7 | 136 | |
7c9281d7 DT |
137 | /* EDAC sysfs CSROW data structures and methods |
138 | */ | |
139 | ||
140 | /* Set of more default csrow<id> attribute show/store functions */ | |
e27e3dac | 141 | static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data, |
052dfb45 | 142 | int private) |
7c9281d7 | 143 | { |
079708b9 | 144 | return sprintf(data, "%u\n", csrow->ue_count); |
7c9281d7 DT |
145 | } |
146 | ||
e27e3dac | 147 | static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data, |
052dfb45 | 148 | int private) |
7c9281d7 | 149 | { |
079708b9 | 150 | return sprintf(data, "%u\n", csrow->ce_count); |
7c9281d7 DT |
151 | } |
152 | ||
e27e3dac | 153 | static ssize_t csrow_size_show(struct csrow_info *csrow, char *data, |
052dfb45 | 154 | int private) |
7c9281d7 | 155 | { |
079708b9 | 156 | return sprintf(data, "%u\n", PAGES_TO_MiB(csrow->nr_pages)); |
7c9281d7 DT |
157 | } |
158 | ||
e27e3dac | 159 | static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data, |
052dfb45 | 160 | int private) |
7c9281d7 | 161 | { |
079708b9 | 162 | return sprintf(data, "%s\n", mem_types[csrow->mtype]); |
7c9281d7 DT |
163 | } |
164 | ||
e27e3dac | 165 | static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data, |
052dfb45 | 166 | int private) |
7c9281d7 | 167 | { |
079708b9 | 168 | return sprintf(data, "%s\n", dev_types[csrow->dtype]); |
7c9281d7 DT |
169 | } |
170 | ||
e27e3dac | 171 | static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data, |
052dfb45 | 172 | int private) |
7c9281d7 | 173 | { |
079708b9 | 174 | return sprintf(data, "%s\n", edac_caps[csrow->edac_mode]); |
7c9281d7 DT |
175 | } |
176 | ||
177 | /* show/store functions for DIMM Label attributes */ | |
178 | static ssize_t channel_dimm_label_show(struct csrow_info *csrow, | |
052dfb45 | 179 | char *data, int channel) |
7c9281d7 | 180 | { |
124682c7 AJ |
181 | /* if field has not been initialized, there is nothing to send */ |
182 | if (!csrow->channels[channel].label[0]) | |
183 | return 0; | |
184 | ||
185 | return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n", | |
7c9281d7 DT |
186 | csrow->channels[channel].label); |
187 | } | |
188 | ||
189 | static ssize_t channel_dimm_label_store(struct csrow_info *csrow, | |
079708b9 DT |
190 | const char *data, |
191 | size_t count, int channel) | |
7c9281d7 DT |
192 | { |
193 | ssize_t max_size = 0; | |
194 | ||
079708b9 | 195 | max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1); |
7c9281d7 DT |
196 | strncpy(csrow->channels[channel].label, data, max_size); |
197 | csrow->channels[channel].label[max_size] = '\0'; | |
198 | ||
199 | return max_size; | |
200 | } | |
201 | ||
202 | /* show function for dynamic chX_ce_count attribute */ | |
203 | static ssize_t channel_ce_count_show(struct csrow_info *csrow, | |
052dfb45 | 204 | char *data, int channel) |
7c9281d7 DT |
205 | { |
206 | return sprintf(data, "%u\n", csrow->channels[channel].ce_count); | |
207 | } | |
208 | ||
209 | /* csrow specific attribute structure */ | |
210 | struct csrowdev_attribute { | |
211 | struct attribute attr; | |
079708b9 DT |
212 | ssize_t(*show) (struct csrow_info *, char *, int); |
213 | ssize_t(*store) (struct csrow_info *, const char *, size_t, int); | |
214 | int private; | |
7c9281d7 DT |
215 | }; |
216 | ||
217 | #define to_csrow(k) container_of(k, struct csrow_info, kobj) | |
218 | #define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr) | |
219 | ||
220 | /* Set of show/store higher level functions for default csrow attributes */ | |
221 | static ssize_t csrowdev_show(struct kobject *kobj, | |
052dfb45 | 222 | struct attribute *attr, char *buffer) |
7c9281d7 DT |
223 | { |
224 | struct csrow_info *csrow = to_csrow(kobj); | |
225 | struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr); | |
226 | ||
227 | if (csrowdev_attr->show) | |
228 | return csrowdev_attr->show(csrow, | |
052dfb45 | 229 | buffer, csrowdev_attr->private); |
7c9281d7 DT |
230 | return -EIO; |
231 | } | |
232 | ||
233 | static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr, | |
052dfb45 | 234 | const char *buffer, size_t count) |
7c9281d7 DT |
235 | { |
236 | struct csrow_info *csrow = to_csrow(kobj); | |
079708b9 | 237 | struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr); |
7c9281d7 DT |
238 | |
239 | if (csrowdev_attr->store) | |
240 | return csrowdev_attr->store(csrow, | |
052dfb45 DT |
241 | buffer, |
242 | count, csrowdev_attr->private); | |
7c9281d7 DT |
243 | return -EIO; |
244 | } | |
245 | ||
246 | static struct sysfs_ops csrowfs_ops = { | |
079708b9 DT |
247 | .show = csrowdev_show, |
248 | .store = csrowdev_store | |
7c9281d7 DT |
249 | }; |
250 | ||
251 | #define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \ | |
252 | static struct csrowdev_attribute attr_##_name = { \ | |
253 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
254 | .show = _show, \ | |
255 | .store = _store, \ | |
256 | .private = _private, \ | |
257 | }; | |
258 | ||
259 | /* default cwrow<id>/attribute files */ | |
079708b9 DT |
260 | CSROWDEV_ATTR(size_mb, S_IRUGO, csrow_size_show, NULL, 0); |
261 | CSROWDEV_ATTR(dev_type, S_IRUGO, csrow_dev_type_show, NULL, 0); | |
262 | CSROWDEV_ATTR(mem_type, S_IRUGO, csrow_mem_type_show, NULL, 0); | |
263 | CSROWDEV_ATTR(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL, 0); | |
264 | CSROWDEV_ATTR(ue_count, S_IRUGO, csrow_ue_count_show, NULL, 0); | |
265 | CSROWDEV_ATTR(ce_count, S_IRUGO, csrow_ce_count_show, NULL, 0); | |
7c9281d7 DT |
266 | |
267 | /* default attributes of the CSROW<id> object */ | |
268 | static struct csrowdev_attribute *default_csrow_attr[] = { | |
269 | &attr_dev_type, | |
270 | &attr_mem_type, | |
271 | &attr_edac_mode, | |
272 | &attr_size_mb, | |
273 | &attr_ue_count, | |
274 | &attr_ce_count, | |
275 | NULL, | |
276 | }; | |
277 | ||
7c9281d7 | 278 | /* possible dynamic channel DIMM Label attribute files */ |
079708b9 | 279 | CSROWDEV_ATTR(ch0_dimm_label, S_IRUGO | S_IWUSR, |
052dfb45 | 280 | channel_dimm_label_show, channel_dimm_label_store, 0); |
079708b9 | 281 | CSROWDEV_ATTR(ch1_dimm_label, S_IRUGO | S_IWUSR, |
052dfb45 | 282 | channel_dimm_label_show, channel_dimm_label_store, 1); |
079708b9 | 283 | CSROWDEV_ATTR(ch2_dimm_label, S_IRUGO | S_IWUSR, |
052dfb45 | 284 | channel_dimm_label_show, channel_dimm_label_store, 2); |
079708b9 | 285 | CSROWDEV_ATTR(ch3_dimm_label, S_IRUGO | S_IWUSR, |
052dfb45 | 286 | channel_dimm_label_show, channel_dimm_label_store, 3); |
079708b9 | 287 | CSROWDEV_ATTR(ch4_dimm_label, S_IRUGO | S_IWUSR, |
052dfb45 | 288 | channel_dimm_label_show, channel_dimm_label_store, 4); |
079708b9 | 289 | CSROWDEV_ATTR(ch5_dimm_label, S_IRUGO | S_IWUSR, |
052dfb45 | 290 | channel_dimm_label_show, channel_dimm_label_store, 5); |
7c9281d7 DT |
291 | |
292 | /* Total possible dynamic DIMM Label attribute file table */ | |
293 | static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = { | |
079708b9 DT |
294 | &attr_ch0_dimm_label, |
295 | &attr_ch1_dimm_label, | |
296 | &attr_ch2_dimm_label, | |
297 | &attr_ch3_dimm_label, | |
298 | &attr_ch4_dimm_label, | |
299 | &attr_ch5_dimm_label | |
7c9281d7 DT |
300 | }; |
301 | ||
302 | /* possible dynamic channel ce_count attribute files */ | |
079708b9 DT |
303 | CSROWDEV_ATTR(ch0_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 0); |
304 | CSROWDEV_ATTR(ch1_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 1); | |
305 | CSROWDEV_ATTR(ch2_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 2); | |
306 | CSROWDEV_ATTR(ch3_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 3); | |
307 | CSROWDEV_ATTR(ch4_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 4); | |
308 | CSROWDEV_ATTR(ch5_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 5); | |
7c9281d7 DT |
309 | |
310 | /* Total possible dynamic ce_count attribute file table */ | |
311 | static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = { | |
079708b9 DT |
312 | &attr_ch0_ce_count, |
313 | &attr_ch1_ce_count, | |
314 | &attr_ch2_ce_count, | |
315 | &attr_ch3_ce_count, | |
316 | &attr_ch4_ce_count, | |
317 | &attr_ch5_ce_count | |
7c9281d7 DT |
318 | }; |
319 | ||
7c9281d7 DT |
320 | #define EDAC_NR_CHANNELS 6 |
321 | ||
322 | /* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */ | |
323 | static int edac_create_channel_files(struct kobject *kobj, int chan) | |
324 | { | |
079708b9 | 325 | int err = -ENODEV; |
7c9281d7 DT |
326 | |
327 | if (chan >= EDAC_NR_CHANNELS) | |
328 | return err; | |
329 | ||
330 | /* create the DIMM label attribute file */ | |
331 | err = sysfs_create_file(kobj, | |
079708b9 DT |
332 | (struct attribute *) |
333 | dynamic_csrow_dimm_attr[chan]); | |
7c9281d7 DT |
334 | |
335 | if (!err) { | |
336 | /* create the CE Count attribute file */ | |
337 | err = sysfs_create_file(kobj, | |
079708b9 DT |
338 | (struct attribute *) |
339 | dynamic_csrow_ce_count_attr[chan]); | |
7c9281d7 | 340 | } else { |
e27e3dac DT |
341 | debugf1("%s() dimm labels and ce_count files created", |
342 | __func__); | |
7c9281d7 DT |
343 | } |
344 | ||
345 | return err; | |
346 | } | |
347 | ||
348 | /* No memory to release for this kobj */ | |
349 | static void edac_csrow_instance_release(struct kobject *kobj) | |
350 | { | |
8096cfaf | 351 | struct mem_ctl_info *mci; |
7c9281d7 DT |
352 | struct csrow_info *cs; |
353 | ||
8096cfaf DT |
354 | debugf1("%s()\n", __func__); |
355 | ||
7c9281d7 | 356 | cs = container_of(kobj, struct csrow_info, kobj); |
8096cfaf DT |
357 | mci = cs->mci; |
358 | ||
359 | kobject_put(&mci->edac_mci_kobj); | |
7c9281d7 DT |
360 | } |
361 | ||
362 | /* the kobj_type instance for a CSROW */ | |
363 | static struct kobj_type ktype_csrow = { | |
364 | .release = edac_csrow_instance_release, | |
365 | .sysfs_ops = &csrowfs_ops, | |
079708b9 | 366 | .default_attrs = (struct attribute **)default_csrow_attr, |
7c9281d7 DT |
367 | }; |
368 | ||
369 | /* Create a CSROW object under specifed edac_mc_device */ | |
8096cfaf DT |
370 | static int edac_create_csrow_object(struct mem_ctl_info *mci, |
371 | struct csrow_info *csrow, int index) | |
7c9281d7 | 372 | { |
8096cfaf DT |
373 | struct kobject *kobj_mci = &mci->edac_mci_kobj; |
374 | struct kobject *kobj; | |
7c9281d7 | 375 | int chan; |
8096cfaf | 376 | int err; |
7c9281d7 DT |
377 | |
378 | /* generate ..../edac/mc/mc<id>/csrow<index> */ | |
8096cfaf DT |
379 | memset(&csrow->kobj, 0, sizeof(csrow->kobj)); |
380 | csrow->mci = mci; /* include container up link */ | |
8096cfaf DT |
381 | |
382 | /* bump the mci instance's kobject's ref count */ | |
383 | kobj = kobject_get(&mci->edac_mci_kobj); | |
384 | if (!kobj) { | |
385 | err = -ENODEV; | |
386 | goto err_out; | |
387 | } | |
7c9281d7 DT |
388 | |
389 | /* Instanstiate the csrow object */ | |
b2ed215a GKH |
390 | err = kobject_init_and_add(&csrow->kobj, &ktype_csrow, kobj_mci, |
391 | "csrow%d", index); | |
8096cfaf DT |
392 | if (err) |
393 | goto err_release_top_kobj; | |
394 | ||
395 | /* At this point, to release a csrow kobj, one must | |
c10997f6 | 396 | * call the kobject_put and allow that tear down |
8096cfaf DT |
397 | * to work the releasing |
398 | */ | |
399 | ||
400 | /* Create the dyanmic attribute files on this csrow, | |
401 | * namely, the DIMM labels and the channel ce_count | |
402 | */ | |
403 | for (chan = 0; chan < csrow->nr_channels; chan++) { | |
404 | err = edac_create_channel_files(&csrow->kobj, chan); | |
405 | if (err) { | |
406 | /* special case the unregister here */ | |
c10997f6 | 407 | kobject_put(&csrow->kobj); |
8096cfaf | 408 | goto err_out; |
7c9281d7 DT |
409 | } |
410 | } | |
b2ed215a | 411 | kobject_uevent(&csrow->kobj, KOBJ_ADD); |
8096cfaf DT |
412 | return 0; |
413 | ||
414 | /* error unwind stack */ | |
415 | err_release_top_kobj: | |
416 | kobject_put(&mci->edac_mci_kobj); | |
417 | ||
418 | err_out: | |
7c9281d7 DT |
419 | return err; |
420 | } | |
421 | ||
422 | /* default sysfs methods and data structures for the main MCI kobject */ | |
423 | ||
424 | static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci, | |
079708b9 | 425 | const char *data, size_t count) |
7c9281d7 DT |
426 | { |
427 | int row, chan; | |
428 | ||
429 | mci->ue_noinfo_count = 0; | |
430 | mci->ce_noinfo_count = 0; | |
431 | mci->ue_count = 0; | |
432 | mci->ce_count = 0; | |
433 | ||
434 | for (row = 0; row < mci->nr_csrows; row++) { | |
435 | struct csrow_info *ri = &mci->csrows[row]; | |
436 | ||
437 | ri->ue_count = 0; | |
438 | ri->ce_count = 0; | |
439 | ||
440 | for (chan = 0; chan < ri->nr_channels; chan++) | |
441 | ri->channels[chan].ce_count = 0; | |
442 | } | |
443 | ||
444 | mci->start_time = jiffies; | |
445 | return count; | |
446 | } | |
447 | ||
448 | /* memory scrubbing */ | |
449 | static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci, | |
052dfb45 | 450 | const char *data, size_t count) |
7c9281d7 DT |
451 | { |
452 | u32 bandwidth = -1; | |
453 | ||
454 | if (mci->set_sdram_scrub_rate) { | |
455 | ||
456 | memctrl_int_store(&bandwidth, data, count); | |
457 | ||
079708b9 | 458 | if (!(*mci->set_sdram_scrub_rate) (mci, &bandwidth)) { |
7c9281d7 | 459 | edac_printk(KERN_DEBUG, EDAC_MC, |
052dfb45 DT |
460 | "Scrub rate set successfully, applied: %d\n", |
461 | bandwidth); | |
7c9281d7 DT |
462 | } else { |
463 | /* FIXME: error codes maybe? */ | |
464 | edac_printk(KERN_DEBUG, EDAC_MC, | |
052dfb45 DT |
465 | "Scrub rate set FAILED, could not apply: %d\n", |
466 | bandwidth); | |
7c9281d7 DT |
467 | } |
468 | } else { | |
469 | /* FIXME: produce "not implemented" ERROR for user-side. */ | |
470 | edac_printk(KERN_WARNING, EDAC_MC, | |
052dfb45 | 471 | "Memory scrubbing 'set'control is not implemented!\n"); |
7c9281d7 DT |
472 | } |
473 | return count; | |
474 | } | |
475 | ||
476 | static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data) | |
477 | { | |
478 | u32 bandwidth = -1; | |
479 | ||
480 | if (mci->get_sdram_scrub_rate) { | |
079708b9 | 481 | if (!(*mci->get_sdram_scrub_rate) (mci, &bandwidth)) { |
7c9281d7 | 482 | edac_printk(KERN_DEBUG, EDAC_MC, |
052dfb45 DT |
483 | "Scrub rate successfully, fetched: %d\n", |
484 | bandwidth); | |
7c9281d7 DT |
485 | } else { |
486 | /* FIXME: error codes maybe? */ | |
487 | edac_printk(KERN_DEBUG, EDAC_MC, | |
052dfb45 DT |
488 | "Scrub rate fetch FAILED, got: %d\n", |
489 | bandwidth); | |
7c9281d7 DT |
490 | } |
491 | } else { | |
492 | /* FIXME: produce "not implemented" ERROR for user-side. */ | |
493 | edac_printk(KERN_WARNING, EDAC_MC, | |
052dfb45 | 494 | "Memory scrubbing 'get' control is not implemented\n"); |
7c9281d7 DT |
495 | } |
496 | return sprintf(data, "%d\n", bandwidth); | |
497 | } | |
498 | ||
499 | /* default attribute files for the MCI object */ | |
500 | static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data) | |
501 | { | |
079708b9 | 502 | return sprintf(data, "%d\n", mci->ue_count); |
7c9281d7 DT |
503 | } |
504 | ||
505 | static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data) | |
506 | { | |
079708b9 | 507 | return sprintf(data, "%d\n", mci->ce_count); |
7c9281d7 DT |
508 | } |
509 | ||
510 | static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data) | |
511 | { | |
079708b9 | 512 | return sprintf(data, "%d\n", mci->ce_noinfo_count); |
7c9281d7 DT |
513 | } |
514 | ||
515 | static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data) | |
516 | { | |
079708b9 | 517 | return sprintf(data, "%d\n", mci->ue_noinfo_count); |
7c9281d7 DT |
518 | } |
519 | ||
520 | static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data) | |
521 | { | |
079708b9 | 522 | return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ); |
7c9281d7 DT |
523 | } |
524 | ||
525 | static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data) | |
526 | { | |
079708b9 | 527 | return sprintf(data, "%s\n", mci->ctl_name); |
7c9281d7 DT |
528 | } |
529 | ||
530 | static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data) | |
531 | { | |
532 | int total_pages, csrow_idx; | |
533 | ||
534 | for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows; | |
052dfb45 | 535 | csrow_idx++) { |
7c9281d7 DT |
536 | struct csrow_info *csrow = &mci->csrows[csrow_idx]; |
537 | ||
538 | if (!csrow->nr_pages) | |
539 | continue; | |
540 | ||
541 | total_pages += csrow->nr_pages; | |
542 | } | |
543 | ||
079708b9 | 544 | return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages)); |
7c9281d7 DT |
545 | } |
546 | ||
7c9281d7 | 547 | #define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj) |
42a8e397 | 548 | #define to_mcidev_attr(a) container_of(a,struct mcidev_sysfs_attribute,attr) |
7c9281d7 DT |
549 | |
550 | /* MCI show/store functions for top most object */ | |
551 | static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr, | |
052dfb45 | 552 | char *buffer) |
7c9281d7 DT |
553 | { |
554 | struct mem_ctl_info *mem_ctl_info = to_mci(kobj); | |
42a8e397 | 555 | struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr); |
7c9281d7 DT |
556 | |
557 | if (mcidev_attr->show) | |
558 | return mcidev_attr->show(mem_ctl_info, buffer); | |
559 | ||
560 | return -EIO; | |
561 | } | |
562 | ||
563 | static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr, | |
052dfb45 | 564 | const char *buffer, size_t count) |
7c9281d7 DT |
565 | { |
566 | struct mem_ctl_info *mem_ctl_info = to_mci(kobj); | |
42a8e397 | 567 | struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr); |
7c9281d7 DT |
568 | |
569 | if (mcidev_attr->store) | |
570 | return mcidev_attr->store(mem_ctl_info, buffer, count); | |
571 | ||
572 | return -EIO; | |
573 | } | |
574 | ||
8096cfaf | 575 | /* Intermediate show/store table */ |
7c9281d7 DT |
576 | static struct sysfs_ops mci_ops = { |
577 | .show = mcidev_show, | |
578 | .store = mcidev_store | |
579 | }; | |
580 | ||
581 | #define MCIDEV_ATTR(_name,_mode,_show,_store) \ | |
42a8e397 | 582 | static struct mcidev_sysfs_attribute mci_attr_##_name = { \ |
7c9281d7 DT |
583 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
584 | .show = _show, \ | |
585 | .store = _store, \ | |
586 | }; | |
587 | ||
588 | /* default Control file */ | |
079708b9 | 589 | MCIDEV_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store); |
7c9281d7 DT |
590 | |
591 | /* default Attribute files */ | |
079708b9 DT |
592 | MCIDEV_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL); |
593 | MCIDEV_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL); | |
594 | MCIDEV_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL); | |
595 | MCIDEV_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL); | |
596 | MCIDEV_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL); | |
597 | MCIDEV_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL); | |
598 | MCIDEV_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL); | |
7c9281d7 DT |
599 | |
600 | /* memory scrubber attribute file */ | |
079708b9 | 601 | MCIDEV_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show, |
052dfb45 | 602 | mci_sdram_scrub_rate_store); |
7c9281d7 | 603 | |
42a8e397 | 604 | static struct mcidev_sysfs_attribute *mci_attr[] = { |
7c9281d7 DT |
605 | &mci_attr_reset_counters, |
606 | &mci_attr_mc_name, | |
607 | &mci_attr_size_mb, | |
608 | &mci_attr_seconds_since_reset, | |
609 | &mci_attr_ue_noinfo_count, | |
610 | &mci_attr_ce_noinfo_count, | |
611 | &mci_attr_ue_count, | |
612 | &mci_attr_ce_count, | |
613 | &mci_attr_sdram_scrub_rate, | |
614 | NULL | |
615 | }; | |
616 | ||
8096cfaf | 617 | |
7c9281d7 DT |
618 | /* |
619 | * Release of a MC controlling instance | |
8096cfaf DT |
620 | * |
621 | * each MC control instance has the following resources upon entry: | |
622 | * a) a ref count on the top memctl kobj | |
623 | * b) a ref count on this module | |
624 | * | |
625 | * this function must decrement those ref counts and then | |
626 | * issue a free on the instance's memory | |
7c9281d7 | 627 | */ |
8096cfaf | 628 | static void edac_mci_control_release(struct kobject *kobj) |
7c9281d7 DT |
629 | { |
630 | struct mem_ctl_info *mci; | |
631 | ||
632 | mci = to_mci(kobj); | |
8096cfaf DT |
633 | |
634 | debugf0("%s() mci instance idx=%d releasing\n", __func__, mci->mc_idx); | |
635 | ||
636 | /* decrement the module ref count */ | |
637 | module_put(mci->owner); | |
638 | ||
639 | /* free the mci instance memory here */ | |
640 | kfree(mci); | |
7c9281d7 DT |
641 | } |
642 | ||
643 | static struct kobj_type ktype_mci = { | |
8096cfaf | 644 | .release = edac_mci_control_release, |
7c9281d7 | 645 | .sysfs_ops = &mci_ops, |
079708b9 | 646 | .default_attrs = (struct attribute **)mci_attr, |
7c9281d7 DT |
647 | }; |
648 | ||
8096cfaf DT |
649 | /* EDAC memory controller sysfs kset: |
650 | * /sys/devices/system/edac/mc | |
651 | */ | |
f9fc82ad | 652 | static struct kset *mc_kset; |
8096cfaf DT |
653 | |
654 | /* | |
655 | * edac_mc_register_sysfs_main_kobj | |
656 | * | |
657 | * setups and registers the main kobject for each mci | |
658 | */ | |
659 | int edac_mc_register_sysfs_main_kobj(struct mem_ctl_info *mci) | |
660 | { | |
661 | struct kobject *kobj_mci; | |
662 | int err; | |
663 | ||
664 | debugf1("%s()\n", __func__); | |
665 | ||
666 | kobj_mci = &mci->edac_mci_kobj; | |
667 | ||
668 | /* Init the mci's kobject */ | |
669 | memset(kobj_mci, 0, sizeof(*kobj_mci)); | |
670 | ||
8096cfaf DT |
671 | /* Record which module 'owns' this control structure |
672 | * and bump the ref count of the module | |
673 | */ | |
674 | mci->owner = THIS_MODULE; | |
675 | ||
676 | /* bump ref count on this module */ | |
677 | if (!try_module_get(mci->owner)) { | |
678 | err = -ENODEV; | |
679 | goto fail_out; | |
680 | } | |
681 | ||
b2ed215a | 682 | /* this instance become part of the mc_kset */ |
f9fc82ad | 683 | kobj_mci->kset = mc_kset; |
b2ed215a | 684 | |
8096cfaf | 685 | /* register the mc<id> kobject to the mc_kset */ |
b2ed215a GKH |
686 | err = kobject_init_and_add(kobj_mci, &ktype_mci, NULL, |
687 | "mc%d", mci->mc_idx); | |
8096cfaf DT |
688 | if (err) { |
689 | debugf1("%s()Failed to register '.../edac/mc%d'\n", | |
690 | __func__, mci->mc_idx); | |
691 | goto kobj_reg_fail; | |
692 | } | |
b2ed215a | 693 | kobject_uevent(kobj_mci, KOBJ_ADD); |
8096cfaf DT |
694 | |
695 | /* At this point, to 'free' the control struct, | |
696 | * edac_mc_unregister_sysfs_main_kobj() must be used | |
697 | */ | |
698 | ||
699 | debugf1("%s() Registered '.../edac/mc%d' kobject\n", | |
700 | __func__, mci->mc_idx); | |
701 | ||
702 | return 0; | |
703 | ||
704 | /* Error exit stack */ | |
705 | ||
706 | kobj_reg_fail: | |
707 | module_put(mci->owner); | |
708 | ||
709 | fail_out: | |
710 | return err; | |
711 | } | |
712 | ||
713 | /* | |
714 | * edac_mc_register_sysfs_main_kobj | |
715 | * | |
716 | * tears down and the main mci kobject from the mc_kset | |
717 | */ | |
718 | void edac_mc_unregister_sysfs_main_kobj(struct mem_ctl_info *mci) | |
719 | { | |
720 | /* delete the kobj from the mc_kset */ | |
c10997f6 | 721 | kobject_put(&mci->edac_mci_kobj); |
8096cfaf DT |
722 | } |
723 | ||
7c9281d7 DT |
724 | #define EDAC_DEVICE_SYMLINK "device" |
725 | ||
42a8e397 | 726 | /* |
8096cfaf | 727 | * edac_create_mci_instance_attributes |
42a8e397 DT |
728 | * create MC driver specific attributes at the topmost level |
729 | * directory of this mci instance. | |
730 | */ | |
8096cfaf | 731 | static int edac_create_mci_instance_attributes(struct mem_ctl_info *mci) |
42a8e397 DT |
732 | { |
733 | int err; | |
734 | struct mcidev_sysfs_attribute *sysfs_attrib; | |
735 | ||
736 | /* point to the start of the array and iterate over it | |
737 | * adding each attribute listed to this mci instance's kobject | |
738 | */ | |
739 | sysfs_attrib = mci->mc_driver_sysfs_attributes; | |
740 | ||
8096cfaf | 741 | while (sysfs_attrib && sysfs_attrib->attr.name) { |
42a8e397 DT |
742 | err = sysfs_create_file(&mci->edac_mci_kobj, |
743 | (struct attribute*) sysfs_attrib); | |
744 | if (err) { | |
745 | return err; | |
746 | } | |
747 | ||
748 | sysfs_attrib++; | |
749 | } | |
750 | ||
751 | return 0; | |
752 | } | |
753 | ||
8096cfaf DT |
754 | /* |
755 | * edac_remove_mci_instance_attributes | |
756 | * remove MC driver specific attributes at the topmost level | |
757 | * directory of this mci instance. | |
758 | */ | |
759 | static void edac_remove_mci_instance_attributes(struct mem_ctl_info *mci) | |
760 | { | |
761 | struct mcidev_sysfs_attribute *sysfs_attrib; | |
762 | ||
763 | /* point to the start of the array and iterate over it | |
764 | * adding each attribute listed to this mci instance's kobject | |
765 | */ | |
766 | sysfs_attrib = mci->mc_driver_sysfs_attributes; | |
767 | ||
768 | /* loop if there are attributes and until we hit a NULL entry */ | |
769 | while (sysfs_attrib && sysfs_attrib->attr.name) { | |
770 | sysfs_remove_file(&mci->edac_mci_kobj, | |
771 | (struct attribute *) sysfs_attrib); | |
772 | sysfs_attrib++; | |
773 | } | |
774 | } | |
775 | ||
776 | ||
7c9281d7 DT |
777 | /* |
778 | * Create a new Memory Controller kobject instance, | |
779 | * mc<id> under the 'mc' directory | |
780 | * | |
781 | * Return: | |
782 | * 0 Success | |
783 | * !0 Failure | |
784 | */ | |
785 | int edac_create_sysfs_mci_device(struct mem_ctl_info *mci) | |
786 | { | |
787 | int i; | |
788 | int err; | |
789 | struct csrow_info *csrow; | |
8096cfaf | 790 | struct kobject *kobj_mci = &mci->edac_mci_kobj; |
7c9281d7 DT |
791 | |
792 | debugf0("%s() idx=%d\n", __func__, mci->mc_idx); | |
7c9281d7 DT |
793 | |
794 | /* create a symlink for the device */ | |
8096cfaf | 795 | err = sysfs_create_link(kobj_mci, &mci->dev->kobj, |
7c9281d7 | 796 | EDAC_DEVICE_SYMLINK); |
8096cfaf DT |
797 | if (err) { |
798 | debugf1("%s() failure to create symlink\n", __func__); | |
7c9281d7 | 799 | goto fail0; |
8096cfaf | 800 | } |
7c9281d7 | 801 | |
42a8e397 DT |
802 | /* If the low level driver desires some attributes, |
803 | * then create them now for the driver. | |
804 | */ | |
805 | if (mci->mc_driver_sysfs_attributes) { | |
8096cfaf DT |
806 | err = edac_create_mci_instance_attributes(mci); |
807 | if (err) { | |
808 | debugf1("%s() failure to create mci attributes\n", | |
809 | __func__); | |
42a8e397 | 810 | goto fail0; |
8096cfaf | 811 | } |
42a8e397 DT |
812 | } |
813 | ||
8096cfaf | 814 | /* Make directories for each CSROW object under the mc<id> kobject |
7c9281d7 DT |
815 | */ |
816 | for (i = 0; i < mci->nr_csrows; i++) { | |
817 | csrow = &mci->csrows[i]; | |
818 | ||
819 | /* Only expose populated CSROWs */ | |
820 | if (csrow->nr_pages > 0) { | |
8096cfaf DT |
821 | err = edac_create_csrow_object(mci, csrow, i); |
822 | if (err) { | |
823 | debugf1("%s() failure: create csrow %d obj\n", | |
824 | __func__, i); | |
7c9281d7 | 825 | goto fail1; |
8096cfaf | 826 | } |
7c9281d7 DT |
827 | } |
828 | } | |
829 | ||
830 | return 0; | |
831 | ||
832 | /* CSROW error: backout what has already been registered, */ | |
052dfb45 | 833 | fail1: |
079708b9 | 834 | for (i--; i >= 0; i--) { |
7c9281d7 | 835 | if (csrow->nr_pages > 0) { |
c10997f6 | 836 | kobject_put(&mci->csrows[i].kobj); |
7c9281d7 DT |
837 | } |
838 | } | |
839 | ||
8096cfaf DT |
840 | /* remove the mci instance's attributes, if any */ |
841 | edac_remove_mci_instance_attributes(mci); | |
842 | ||
843 | /* remove the symlink */ | |
844 | sysfs_remove_link(kobj_mci, EDAC_DEVICE_SYMLINK); | |
845 | ||
052dfb45 | 846 | fail0: |
7c9281d7 DT |
847 | return err; |
848 | } | |
849 | ||
850 | /* | |
851 | * remove a Memory Controller instance | |
852 | */ | |
853 | void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci) | |
854 | { | |
855 | int i; | |
856 | ||
857 | debugf0("%s()\n", __func__); | |
858 | ||
859 | /* remove all csrow kobjects */ | |
860 | for (i = 0; i < mci->nr_csrows; i++) { | |
861 | if (mci->csrows[i].nr_pages > 0) { | |
8096cfaf | 862 | debugf0("%s() unreg csrow-%d\n", __func__, i); |
c10997f6 | 863 | kobject_put(&mci->csrows[i].kobj); |
7c9281d7 DT |
864 | } |
865 | } | |
866 | ||
8096cfaf DT |
867 | debugf0("%s() remove_link\n", __func__); |
868 | ||
869 | /* remove the symlink */ | |
7c9281d7 | 870 | sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK); |
8096cfaf DT |
871 | |
872 | debugf0("%s() remove_mci_instance\n", __func__); | |
873 | ||
874 | /* remove this mci instance's attribtes */ | |
875 | edac_remove_mci_instance_attributes(mci); | |
876 | ||
877 | debugf0("%s() unregister this mci kobj\n", __func__); | |
878 | ||
879 | /* unregister this instance's kobject */ | |
c10997f6 | 880 | kobject_put(&mci->edac_mci_kobj); |
7c9281d7 | 881 | } |
8096cfaf DT |
882 | |
883 | ||
884 | ||
885 | ||
886 | /* | |
887 | * edac_setup_sysfs_mc_kset(void) | |
888 | * | |
889 | * Initialize the mc_kset for the 'mc' entry | |
890 | * This requires creating the top 'mc' directory with a kset | |
891 | * and its controls/attributes. | |
892 | * | |
893 | * To this 'mc' kset, instance 'mci' will be grouped as children. | |
894 | * | |
895 | * Return: 0 SUCCESS | |
896 | * !0 FAILURE error code | |
897 | */ | |
898 | int edac_sysfs_setup_mc_kset(void) | |
899 | { | |
900 | int err = 0; | |
901 | struct sysdev_class *edac_class; | |
902 | ||
903 | debugf1("%s()\n", __func__); | |
904 | ||
905 | /* get the /sys/devices/system/edac class reference */ | |
906 | edac_class = edac_get_edac_class(); | |
907 | if (edac_class == NULL) { | |
908 | debugf1("%s() no edac_class error=%d\n", __func__, err); | |
909 | goto fail_out; | |
910 | } | |
911 | ||
912 | /* Init the MC's kobject */ | |
f9fc82ad AJ |
913 | mc_kset = kset_create_and_add("mc", NULL, &edac_class->kset.kobj); |
914 | if (!mc_kset) { | |
915 | err = -ENOMEM; | |
8096cfaf DT |
916 | debugf1("%s() Failed to register '.../edac/mc'\n", __func__); |
917 | goto fail_out; | |
918 | } | |
919 | ||
920 | debugf1("%s() Registered '.../edac/mc' kobject\n", __func__); | |
921 | ||
922 | return 0; | |
923 | ||
924 | ||
925 | /* error unwind stack */ | |
926 | fail_out: | |
927 | return err; | |
928 | } | |
929 | ||
930 | /* | |
931 | * edac_sysfs_teardown_mc_kset | |
932 | * | |
933 | * deconstruct the mc_ket for memory controllers | |
934 | */ | |
935 | void edac_sysfs_teardown_mc_kset(void) | |
936 | { | |
f9fc82ad | 937 | kset_unregister(mc_kset); |
8096cfaf DT |
938 | } |
939 |