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> |
5a0e3ad6 | 13 | #include <linux/slab.h> |
8096cfaf | 14 | #include <linux/bug.h> |
7c9281d7 | 15 | |
20bcb7a8 | 16 | #include "edac_core.h" |
7c9281d7 DT |
17 | #include "edac_module.h" |
18 | ||
8096cfaf | 19 | |
7c9281d7 | 20 | /* MC EDAC Controls, setable by module parameter, and sysfs */ |
4de78c68 DJ |
21 | static int edac_mc_log_ue = 1; |
22 | static int edac_mc_log_ce = 1; | |
f044091c | 23 | static int edac_mc_panic_on_ue; |
4de78c68 | 24 | static int edac_mc_poll_msec = 1000; |
7c9281d7 DT |
25 | |
26 | /* Getter functions for above */ | |
4de78c68 | 27 | int edac_mc_get_log_ue(void) |
7c9281d7 | 28 | { |
4de78c68 | 29 | return edac_mc_log_ue; |
7c9281d7 DT |
30 | } |
31 | ||
4de78c68 | 32 | int edac_mc_get_log_ce(void) |
7c9281d7 | 33 | { |
4de78c68 | 34 | return edac_mc_log_ce; |
7c9281d7 DT |
35 | } |
36 | ||
4de78c68 | 37 | int edac_mc_get_panic_on_ue(void) |
7c9281d7 | 38 | { |
4de78c68 | 39 | return edac_mc_panic_on_ue; |
7c9281d7 DT |
40 | } |
41 | ||
81d87cb1 DJ |
42 | /* this is temporary */ |
43 | int edac_mc_get_poll_msec(void) | |
44 | { | |
4de78c68 | 45 | return edac_mc_poll_msec; |
7c9281d7 DT |
46 | } |
47 | ||
096846e2 AJ |
48 | static int edac_set_poll_msec(const char *val, struct kernel_param *kp) |
49 | { | |
50 | long l; | |
51 | int ret; | |
52 | ||
53 | if (!val) | |
54 | return -EINVAL; | |
55 | ||
56 | ret = strict_strtol(val, 0, &l); | |
57 | if (ret == -EINVAL || ((int)l != l)) | |
58 | return -EINVAL; | |
59 | *((int *)kp->arg) = l; | |
60 | ||
61 | /* notify edac_mc engine to reset the poll period */ | |
62 | edac_mc_reset_delay_period(l); | |
63 | ||
64 | return 0; | |
65 | } | |
66 | ||
7c9281d7 | 67 | /* Parameter declarations for above */ |
4de78c68 DJ |
68 | module_param(edac_mc_panic_on_ue, int, 0644); |
69 | MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on"); | |
70 | module_param(edac_mc_log_ue, int, 0644); | |
71 | MODULE_PARM_DESC(edac_mc_log_ue, | |
079708b9 | 72 | "Log uncorrectable error to console: 0=off 1=on"); |
4de78c68 DJ |
73 | module_param(edac_mc_log_ce, int, 0644); |
74 | MODULE_PARM_DESC(edac_mc_log_ce, | |
079708b9 | 75 | "Log correctable error to console: 0=off 1=on"); |
096846e2 AJ |
76 | module_param_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_int, |
77 | &edac_mc_poll_msec, 0644); | |
4de78c68 | 78 | MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds"); |
7c9281d7 | 79 | |
7c9281d7 DT |
80 | /* |
81 | * various constants for Memory Controllers | |
82 | */ | |
83 | static const char *mem_types[] = { | |
84 | [MEM_EMPTY] = "Empty", | |
85 | [MEM_RESERVED] = "Reserved", | |
86 | [MEM_UNKNOWN] = "Unknown", | |
87 | [MEM_FPM] = "FPM", | |
88 | [MEM_EDO] = "EDO", | |
89 | [MEM_BEDO] = "BEDO", | |
90 | [MEM_SDR] = "Unbuffered-SDR", | |
91 | [MEM_RDR] = "Registered-SDR", | |
92 | [MEM_DDR] = "Unbuffered-DDR", | |
93 | [MEM_RDDR] = "Registered-DDR", | |
1a9b85e6 DJ |
94 | [MEM_RMBS] = "RMBS", |
95 | [MEM_DDR2] = "Unbuffered-DDR2", | |
96 | [MEM_FB_DDR2] = "FullyBuffered-DDR2", | |
1d5f726c | 97 | [MEM_RDDR2] = "Registered-DDR2", |
b1cfebc9 YS |
98 | [MEM_XDR] = "XDR", |
99 | [MEM_DDR3] = "Unbuffered-DDR3", | |
100 | [MEM_RDDR3] = "Registered-DDR3" | |
7c9281d7 DT |
101 | }; |
102 | ||
103 | static const char *dev_types[] = { | |
104 | [DEV_UNKNOWN] = "Unknown", | |
105 | [DEV_X1] = "x1", | |
106 | [DEV_X2] = "x2", | |
107 | [DEV_X4] = "x4", | |
108 | [DEV_X8] = "x8", | |
109 | [DEV_X16] = "x16", | |
110 | [DEV_X32] = "x32", | |
111 | [DEV_X64] = "x64" | |
112 | }; | |
113 | ||
114 | static const char *edac_caps[] = { | |
115 | [EDAC_UNKNOWN] = "Unknown", | |
116 | [EDAC_NONE] = "None", | |
117 | [EDAC_RESERVED] = "Reserved", | |
118 | [EDAC_PARITY] = "PARITY", | |
119 | [EDAC_EC] = "EC", | |
120 | [EDAC_SECDED] = "SECDED", | |
121 | [EDAC_S2ECD2ED] = "S2ECD2ED", | |
122 | [EDAC_S4ECD4ED] = "S4ECD4ED", | |
123 | [EDAC_S8ECD8ED] = "S8ECD8ED", | |
124 | [EDAC_S16ECD16ED] = "S16ECD16ED" | |
125 | }; | |
126 | ||
7c9281d7 | 127 | |
7c9281d7 | 128 | |
7c9281d7 DT |
129 | static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count) |
130 | { | |
079708b9 | 131 | int *value = (int *)ptr; |
7c9281d7 DT |
132 | |
133 | if (isdigit(*buffer)) | |
134 | *value = simple_strtoul(buffer, NULL, 0); | |
135 | ||
136 | return count; | |
137 | } | |
138 | ||
7c9281d7 | 139 | |
7c9281d7 DT |
140 | /* EDAC sysfs CSROW data structures and methods |
141 | */ | |
142 | ||
143 | /* Set of more default csrow<id> attribute show/store functions */ | |
e27e3dac | 144 | static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data, |
052dfb45 | 145 | int private) |
7c9281d7 | 146 | { |
079708b9 | 147 | return sprintf(data, "%u\n", csrow->ue_count); |
7c9281d7 DT |
148 | } |
149 | ||
e27e3dac | 150 | static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data, |
052dfb45 | 151 | int private) |
7c9281d7 | 152 | { |
079708b9 | 153 | return sprintf(data, "%u\n", csrow->ce_count); |
7c9281d7 DT |
154 | } |
155 | ||
e27e3dac | 156 | static ssize_t csrow_size_show(struct csrow_info *csrow, char *data, |
052dfb45 | 157 | int private) |
7c9281d7 | 158 | { |
079708b9 | 159 | return sprintf(data, "%u\n", PAGES_TO_MiB(csrow->nr_pages)); |
7c9281d7 DT |
160 | } |
161 | ||
e27e3dac | 162 | static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data, |
052dfb45 | 163 | int private) |
7c9281d7 | 164 | { |
079708b9 | 165 | return sprintf(data, "%s\n", mem_types[csrow->mtype]); |
7c9281d7 DT |
166 | } |
167 | ||
e27e3dac | 168 | static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data, |
052dfb45 | 169 | int private) |
7c9281d7 | 170 | { |
079708b9 | 171 | return sprintf(data, "%s\n", dev_types[csrow->dtype]); |
7c9281d7 DT |
172 | } |
173 | ||
e27e3dac | 174 | static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data, |
052dfb45 | 175 | int private) |
7c9281d7 | 176 | { |
079708b9 | 177 | return sprintf(data, "%s\n", edac_caps[csrow->edac_mode]); |
7c9281d7 DT |
178 | } |
179 | ||
180 | /* show/store functions for DIMM Label attributes */ | |
181 | static ssize_t channel_dimm_label_show(struct csrow_info *csrow, | |
052dfb45 | 182 | char *data, int channel) |
7c9281d7 | 183 | { |
124682c7 AJ |
184 | /* if field has not been initialized, there is nothing to send */ |
185 | if (!csrow->channels[channel].label[0]) | |
186 | return 0; | |
187 | ||
188 | return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n", | |
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 | ||
52cf25d0 | 249 | static const 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 */ |
52cf25d0 | 579 | static const struct sysfs_ops mci_ops = { |
7c9281d7 DT |
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 | /* EDAC memory controller sysfs kset: |
653 | * /sys/devices/system/edac/mc | |
654 | */ | |
f9fc82ad | 655 | static struct kset *mc_kset; |
8096cfaf DT |
656 | |
657 | /* | |
658 | * edac_mc_register_sysfs_main_kobj | |
659 | * | |
660 | * setups and registers the main kobject for each mci | |
661 | */ | |
662 | int edac_mc_register_sysfs_main_kobj(struct mem_ctl_info *mci) | |
663 | { | |
664 | struct kobject *kobj_mci; | |
665 | int err; | |
666 | ||
667 | debugf1("%s()\n", __func__); | |
668 | ||
669 | kobj_mci = &mci->edac_mci_kobj; | |
670 | ||
671 | /* Init the mci's kobject */ | |
672 | memset(kobj_mci, 0, sizeof(*kobj_mci)); | |
673 | ||
8096cfaf DT |
674 | /* Record which module 'owns' this control structure |
675 | * and bump the ref count of the module | |
676 | */ | |
677 | mci->owner = THIS_MODULE; | |
678 | ||
679 | /* bump ref count on this module */ | |
680 | if (!try_module_get(mci->owner)) { | |
681 | err = -ENODEV; | |
682 | goto fail_out; | |
683 | } | |
684 | ||
b2ed215a | 685 | /* this instance become part of the mc_kset */ |
f9fc82ad | 686 | kobj_mci->kset = mc_kset; |
b2ed215a | 687 | |
8096cfaf | 688 | /* register the mc<id> kobject to the mc_kset */ |
b2ed215a GKH |
689 | err = kobject_init_and_add(kobj_mci, &ktype_mci, NULL, |
690 | "mc%d", mci->mc_idx); | |
8096cfaf DT |
691 | if (err) { |
692 | debugf1("%s()Failed to register '.../edac/mc%d'\n", | |
693 | __func__, mci->mc_idx); | |
694 | goto kobj_reg_fail; | |
695 | } | |
b2ed215a | 696 | kobject_uevent(kobj_mci, KOBJ_ADD); |
8096cfaf DT |
697 | |
698 | /* At this point, to 'free' the control struct, | |
699 | * edac_mc_unregister_sysfs_main_kobj() must be used | |
700 | */ | |
701 | ||
702 | debugf1("%s() Registered '.../edac/mc%d' kobject\n", | |
703 | __func__, mci->mc_idx); | |
704 | ||
705 | return 0; | |
706 | ||
707 | /* Error exit stack */ | |
708 | ||
709 | kobj_reg_fail: | |
710 | module_put(mci->owner); | |
711 | ||
712 | fail_out: | |
713 | return err; | |
714 | } | |
715 | ||
716 | /* | |
717 | * edac_mc_register_sysfs_main_kobj | |
718 | * | |
719 | * tears down and the main mci kobject from the mc_kset | |
720 | */ | |
721 | void edac_mc_unregister_sysfs_main_kobj(struct mem_ctl_info *mci) | |
722 | { | |
723 | /* delete the kobj from the mc_kset */ | |
c10997f6 | 724 | kobject_put(&mci->edac_mci_kobj); |
8096cfaf DT |
725 | } |
726 | ||
7c9281d7 DT |
727 | #define EDAC_DEVICE_SYMLINK "device" |
728 | ||
42a8e397 | 729 | /* |
8096cfaf | 730 | * edac_create_mci_instance_attributes |
42a8e397 DT |
731 | * create MC driver specific attributes at the topmost level |
732 | * directory of this mci instance. | |
733 | */ | |
8096cfaf | 734 | static int edac_create_mci_instance_attributes(struct mem_ctl_info *mci) |
42a8e397 DT |
735 | { |
736 | int err; | |
737 | struct mcidev_sysfs_attribute *sysfs_attrib; | |
738 | ||
739 | /* point to the start of the array and iterate over it | |
740 | * adding each attribute listed to this mci instance's kobject | |
741 | */ | |
742 | sysfs_attrib = mci->mc_driver_sysfs_attributes; | |
743 | ||
8096cfaf | 744 | while (sysfs_attrib && sysfs_attrib->attr.name) { |
42a8e397 DT |
745 | err = sysfs_create_file(&mci->edac_mci_kobj, |
746 | (struct attribute*) sysfs_attrib); | |
747 | if (err) { | |
748 | return err; | |
749 | } | |
750 | ||
751 | sysfs_attrib++; | |
752 | } | |
753 | ||
754 | return 0; | |
755 | } | |
756 | ||
8096cfaf DT |
757 | /* |
758 | * edac_remove_mci_instance_attributes | |
759 | * remove MC driver specific attributes at the topmost level | |
760 | * directory of this mci instance. | |
761 | */ | |
762 | static void edac_remove_mci_instance_attributes(struct mem_ctl_info *mci) | |
763 | { | |
764 | struct mcidev_sysfs_attribute *sysfs_attrib; | |
765 | ||
766 | /* point to the start of the array and iterate over it | |
767 | * adding each attribute listed to this mci instance's kobject | |
768 | */ | |
769 | sysfs_attrib = mci->mc_driver_sysfs_attributes; | |
770 | ||
771 | /* loop if there are attributes and until we hit a NULL entry */ | |
772 | while (sysfs_attrib && sysfs_attrib->attr.name) { | |
773 | sysfs_remove_file(&mci->edac_mci_kobj, | |
774 | (struct attribute *) sysfs_attrib); | |
775 | sysfs_attrib++; | |
776 | } | |
777 | } | |
778 | ||
779 | ||
7c9281d7 DT |
780 | /* |
781 | * Create a new Memory Controller kobject instance, | |
782 | * mc<id> under the 'mc' directory | |
783 | * | |
784 | * Return: | |
785 | * 0 Success | |
786 | * !0 Failure | |
787 | */ | |
788 | int edac_create_sysfs_mci_device(struct mem_ctl_info *mci) | |
789 | { | |
790 | int i; | |
791 | int err; | |
792 | struct csrow_info *csrow; | |
8096cfaf | 793 | struct kobject *kobj_mci = &mci->edac_mci_kobj; |
7c9281d7 DT |
794 | |
795 | debugf0("%s() idx=%d\n", __func__, mci->mc_idx); | |
7c9281d7 DT |
796 | |
797 | /* create a symlink for the device */ | |
8096cfaf | 798 | err = sysfs_create_link(kobj_mci, &mci->dev->kobj, |
7c9281d7 | 799 | EDAC_DEVICE_SYMLINK); |
8096cfaf DT |
800 | if (err) { |
801 | debugf1("%s() failure to create symlink\n", __func__); | |
7c9281d7 | 802 | goto fail0; |
8096cfaf | 803 | } |
7c9281d7 | 804 | |
42a8e397 DT |
805 | /* If the low level driver desires some attributes, |
806 | * then create them now for the driver. | |
807 | */ | |
808 | if (mci->mc_driver_sysfs_attributes) { | |
8096cfaf DT |
809 | err = edac_create_mci_instance_attributes(mci); |
810 | if (err) { | |
811 | debugf1("%s() failure to create mci attributes\n", | |
812 | __func__); | |
42a8e397 | 813 | goto fail0; |
8096cfaf | 814 | } |
42a8e397 DT |
815 | } |
816 | ||
8096cfaf | 817 | /* Make directories for each CSROW object under the mc<id> kobject |
7c9281d7 DT |
818 | */ |
819 | for (i = 0; i < mci->nr_csrows; i++) { | |
820 | csrow = &mci->csrows[i]; | |
821 | ||
822 | /* Only expose populated CSROWs */ | |
823 | if (csrow->nr_pages > 0) { | |
8096cfaf DT |
824 | err = edac_create_csrow_object(mci, csrow, i); |
825 | if (err) { | |
826 | debugf1("%s() failure: create csrow %d obj\n", | |
827 | __func__, i); | |
7c9281d7 | 828 | goto fail1; |
8096cfaf | 829 | } |
7c9281d7 DT |
830 | } |
831 | } | |
832 | ||
833 | return 0; | |
834 | ||
835 | /* CSROW error: backout what has already been registered, */ | |
052dfb45 | 836 | fail1: |
079708b9 | 837 | for (i--; i >= 0; i--) { |
7c9281d7 | 838 | if (csrow->nr_pages > 0) { |
c10997f6 | 839 | kobject_put(&mci->csrows[i].kobj); |
7c9281d7 DT |
840 | } |
841 | } | |
842 | ||
8096cfaf DT |
843 | /* remove the mci instance's attributes, if any */ |
844 | edac_remove_mci_instance_attributes(mci); | |
845 | ||
846 | /* remove the symlink */ | |
847 | sysfs_remove_link(kobj_mci, EDAC_DEVICE_SYMLINK); | |
848 | ||
052dfb45 | 849 | fail0: |
7c9281d7 DT |
850 | return err; |
851 | } | |
852 | ||
853 | /* | |
854 | * remove a Memory Controller instance | |
855 | */ | |
856 | void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci) | |
857 | { | |
858 | int i; | |
859 | ||
860 | debugf0("%s()\n", __func__); | |
861 | ||
862 | /* remove all csrow kobjects */ | |
863 | for (i = 0; i < mci->nr_csrows; i++) { | |
864 | if (mci->csrows[i].nr_pages > 0) { | |
8096cfaf | 865 | debugf0("%s() unreg csrow-%d\n", __func__, i); |
c10997f6 | 866 | kobject_put(&mci->csrows[i].kobj); |
7c9281d7 DT |
867 | } |
868 | } | |
869 | ||
8096cfaf DT |
870 | debugf0("%s() remove_link\n", __func__); |
871 | ||
872 | /* remove the symlink */ | |
7c9281d7 | 873 | sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK); |
8096cfaf DT |
874 | |
875 | debugf0("%s() remove_mci_instance\n", __func__); | |
876 | ||
877 | /* remove this mci instance's attribtes */ | |
878 | edac_remove_mci_instance_attributes(mci); | |
879 | ||
880 | debugf0("%s() unregister this mci kobj\n", __func__); | |
881 | ||
882 | /* unregister this instance's kobject */ | |
c10997f6 | 883 | kobject_put(&mci->edac_mci_kobj); |
7c9281d7 | 884 | } |
8096cfaf DT |
885 | |
886 | ||
887 | ||
888 | ||
889 | /* | |
890 | * edac_setup_sysfs_mc_kset(void) | |
891 | * | |
892 | * Initialize the mc_kset for the 'mc' entry | |
893 | * This requires creating the top 'mc' directory with a kset | |
894 | * and its controls/attributes. | |
895 | * | |
896 | * To this 'mc' kset, instance 'mci' will be grouped as children. | |
897 | * | |
898 | * Return: 0 SUCCESS | |
899 | * !0 FAILURE error code | |
900 | */ | |
901 | int edac_sysfs_setup_mc_kset(void) | |
902 | { | |
903 | int err = 0; | |
904 | struct sysdev_class *edac_class; | |
905 | ||
906 | debugf1("%s()\n", __func__); | |
907 | ||
908 | /* get the /sys/devices/system/edac class reference */ | |
909 | edac_class = edac_get_edac_class(); | |
910 | if (edac_class == NULL) { | |
911 | debugf1("%s() no edac_class error=%d\n", __func__, err); | |
912 | goto fail_out; | |
913 | } | |
914 | ||
915 | /* Init the MC's kobject */ | |
f9fc82ad AJ |
916 | mc_kset = kset_create_and_add("mc", NULL, &edac_class->kset.kobj); |
917 | if (!mc_kset) { | |
918 | err = -ENOMEM; | |
8096cfaf DT |
919 | debugf1("%s() Failed to register '.../edac/mc'\n", __func__); |
920 | goto fail_out; | |
921 | } | |
922 | ||
923 | debugf1("%s() Registered '.../edac/mc' kobject\n", __func__); | |
924 | ||
925 | return 0; | |
926 | ||
927 | ||
928 | /* error unwind stack */ | |
929 | fail_out: | |
930 | return err; | |
931 | } | |
932 | ||
933 | /* | |
934 | * edac_sysfs_teardown_mc_kset | |
935 | * | |
936 | * deconstruct the mc_ket for memory controllers | |
937 | */ | |
938 | void edac_sysfs_teardown_mc_kset(void) | |
939 | { | |
f9fc82ad | 940 | kset_unregister(mc_kset); |
8096cfaf DT |
941 | } |
942 |