blob: a4135860149b5592e6e73e8036796f63e6f045d4 [file] [log] [blame]
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001/*
2 * edac_mc kernel module
Douglas Thompson42a8e392007-07-19 01:50:10 -07003 * (C) 2005-2007 Linux Networx (http://lnxi.com)
4 *
Douglas Thompson7c9281d2007-07-19 01:49:33 -07005 * This file may be distributed under the terms of the
6 * GNU General Public License.
7 *
Douglas Thompson42a8e392007-07-19 01:50:10 -07008 * Written Doug Thompson <norsk5@xmission.com> www.softwarebitmaker.com
Douglas Thompson7c9281d2007-07-19 01:49:33 -07009 *
10 */
11
Douglas Thompson7c9281d2007-07-19 01:49:33 -070012#include <linux/ctype.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090013#include <linux/slab.h>
Borislav Petkov30e1f7a2010-09-02 17:26:48 +020014#include <linux/edac.h>
Doug Thompson8096cfa2007-07-19 01:50:27 -070015#include <linux/bug.h>
Douglas Thompson7c9281d2007-07-19 01:49:33 -070016
Douglas Thompson20bcb7a2007-07-19 01:49:47 -070017#include "edac_core.h"
Douglas Thompson7c9281d2007-07-19 01:49:33 -070018#include "edac_module.h"
19
Doug Thompson8096cfa2007-07-19 01:50:27 -070020
Douglas Thompson7c9281d2007-07-19 01:49:33 -070021/* MC EDAC Controls, setable by module parameter, and sysfs */
Dave Jiang4de78c62007-07-19 01:49:54 -070022static int edac_mc_log_ue = 1;
23static int edac_mc_log_ce = 1;
Douglas Thompsonf0440912007-07-19 01:50:19 -070024static int edac_mc_panic_on_ue;
Dave Jiang4de78c62007-07-19 01:49:54 -070025static int edac_mc_poll_msec = 1000;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070026
27/* Getter functions for above */
Dave Jiang4de78c62007-07-19 01:49:54 -070028int edac_mc_get_log_ue(void)
Douglas Thompson7c9281d2007-07-19 01:49:33 -070029{
Dave Jiang4de78c62007-07-19 01:49:54 -070030 return edac_mc_log_ue;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070031}
32
Dave Jiang4de78c62007-07-19 01:49:54 -070033int edac_mc_get_log_ce(void)
Douglas Thompson7c9281d2007-07-19 01:49:33 -070034{
Dave Jiang4de78c62007-07-19 01:49:54 -070035 return edac_mc_log_ce;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070036}
37
Dave Jiang4de78c62007-07-19 01:49:54 -070038int edac_mc_get_panic_on_ue(void)
Douglas Thompson7c9281d2007-07-19 01:49:33 -070039{
Dave Jiang4de78c62007-07-19 01:49:54 -070040 return edac_mc_panic_on_ue;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070041}
42
Dave Jiang81d87cb2007-07-19 01:49:52 -070043/* this is temporary */
44int edac_mc_get_poll_msec(void)
45{
Dave Jiang4de78c62007-07-19 01:49:54 -070046 return edac_mc_poll_msec;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070047}
48
Arthur Jones096846e2008-07-25 01:49:09 -070049static int edac_set_poll_msec(const char *val, struct kernel_param *kp)
50{
51 long l;
52 int ret;
53
54 if (!val)
55 return -EINVAL;
56
57 ret = strict_strtol(val, 0, &l);
58 if (ret == -EINVAL || ((int)l != l))
59 return -EINVAL;
60 *((int *)kp->arg) = l;
61
62 /* notify edac_mc engine to reset the poll period */
63 edac_mc_reset_delay_period(l);
64
65 return 0;
66}
67
Douglas Thompson7c9281d2007-07-19 01:49:33 -070068/* Parameter declarations for above */
Dave Jiang4de78c62007-07-19 01:49:54 -070069module_param(edac_mc_panic_on_ue, int, 0644);
70MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
71module_param(edac_mc_log_ue, int, 0644);
72MODULE_PARM_DESC(edac_mc_log_ue,
Douglas Thompson079708b2007-07-19 01:49:58 -070073 "Log uncorrectable error to console: 0=off 1=on");
Dave Jiang4de78c62007-07-19 01:49:54 -070074module_param(edac_mc_log_ce, int, 0644);
75MODULE_PARM_DESC(edac_mc_log_ce,
Douglas Thompson079708b2007-07-19 01:49:58 -070076 "Log correctable error to console: 0=off 1=on");
Arthur Jones096846e2008-07-25 01:49:09 -070077module_param_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_int,
78 &edac_mc_poll_msec, 0644);
Dave Jiang4de78c62007-07-19 01:49:54 -070079MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
Douglas Thompson7c9281d2007-07-19 01:49:33 -070080
Douglas Thompson7c9281d2007-07-19 01:49:33 -070081/*
82 * various constants for Memory Controllers
83 */
84static const char *mem_types[] = {
85 [MEM_EMPTY] = "Empty",
86 [MEM_RESERVED] = "Reserved",
87 [MEM_UNKNOWN] = "Unknown",
88 [MEM_FPM] = "FPM",
89 [MEM_EDO] = "EDO",
90 [MEM_BEDO] = "BEDO",
91 [MEM_SDR] = "Unbuffered-SDR",
92 [MEM_RDR] = "Registered-SDR",
93 [MEM_DDR] = "Unbuffered-DDR",
94 [MEM_RDDR] = "Registered-DDR",
Dave Jiang1a9b85e2007-07-19 01:49:38 -070095 [MEM_RMBS] = "RMBS",
96 [MEM_DDR2] = "Unbuffered-DDR2",
97 [MEM_FB_DDR2] = "FullyBuffered-DDR2",
Benjamin Herrenschmidt1d5f7262008-02-07 00:14:52 -080098 [MEM_RDDR2] = "Registered-DDR2",
Yang Shib1cfebc2009-06-30 11:41:22 -070099 [MEM_XDR] = "XDR",
100 [MEM_DDR3] = "Unbuffered-DDR3",
101 [MEM_RDDR3] = "Registered-DDR3"
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700102};
103
104static const char *dev_types[] = {
105 [DEV_UNKNOWN] = "Unknown",
106 [DEV_X1] = "x1",
107 [DEV_X2] = "x2",
108 [DEV_X4] = "x4",
109 [DEV_X8] = "x8",
110 [DEV_X16] = "x16",
111 [DEV_X32] = "x32",
112 [DEV_X64] = "x64"
113};
114
115static const char *edac_caps[] = {
116 [EDAC_UNKNOWN] = "Unknown",
117 [EDAC_NONE] = "None",
118 [EDAC_RESERVED] = "Reserved",
119 [EDAC_PARITY] = "PARITY",
120 [EDAC_EC] = "EC",
121 [EDAC_SECDED] = "SECDED",
122 [EDAC_S2ECD2ED] = "S2ECD2ED",
123 [EDAC_S4ECD4ED] = "S4ECD4ED",
124 [EDAC_S8ECD8ED] = "S8ECD8ED",
125 [EDAC_S16ECD16ED] = "S16ECD16ED"
126};
127
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700128/* EDAC sysfs CSROW data structures and methods
129 */
130
131/* Set of more default csrow<id> attribute show/store functions */
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700132static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700133 int private)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700134{
Douglas Thompson079708b2007-07-19 01:49:58 -0700135 return sprintf(data, "%u\n", csrow->ue_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700136}
137
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700138static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700139 int private)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700140{
Douglas Thompson079708b2007-07-19 01:49:58 -0700141 return sprintf(data, "%u\n", csrow->ce_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700142}
143
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700144static ssize_t csrow_size_show(struct csrow_info *csrow, char *data,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700145 int private)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700146{
Douglas Thompson079708b2007-07-19 01:49:58 -0700147 return sprintf(data, "%u\n", PAGES_TO_MiB(csrow->nr_pages));
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700148}
149
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700150static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700151 int private)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700152{
Douglas Thompson079708b2007-07-19 01:49:58 -0700153 return sprintf(data, "%s\n", mem_types[csrow->mtype]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700154}
155
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700156static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700157 int private)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700158{
Douglas Thompson079708b2007-07-19 01:49:58 -0700159 return sprintf(data, "%s\n", dev_types[csrow->dtype]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700160}
161
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700162static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700163 int private)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700164{
Douglas Thompson079708b2007-07-19 01:49:58 -0700165 return sprintf(data, "%s\n", edac_caps[csrow->edac_mode]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700166}
167
168/* show/store functions for DIMM Label attributes */
169static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700170 char *data, int channel)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700171{
Arthur Jones124682c2008-07-25 01:49:12 -0700172 /* if field has not been initialized, there is nothing to send */
173 if (!csrow->channels[channel].label[0])
174 return 0;
175
176 return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n",
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700177 csrow->channels[channel].label);
178}
179
180static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
Douglas Thompson079708b2007-07-19 01:49:58 -0700181 const char *data,
182 size_t count, int channel)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700183{
184 ssize_t max_size = 0;
185
Douglas Thompson079708b2007-07-19 01:49:58 -0700186 max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700187 strncpy(csrow->channels[channel].label, data, max_size);
188 csrow->channels[channel].label[max_size] = '\0';
189
190 return max_size;
191}
192
193/* show function for dynamic chX_ce_count attribute */
194static ssize_t channel_ce_count_show(struct csrow_info *csrow,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700195 char *data, int channel)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700196{
197 return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
198}
199
200/* csrow specific attribute structure */
201struct csrowdev_attribute {
202 struct attribute attr;
Douglas Thompson079708b2007-07-19 01:49:58 -0700203 ssize_t(*show) (struct csrow_info *, char *, int);
204 ssize_t(*store) (struct csrow_info *, const char *, size_t, int);
205 int private;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700206};
207
208#define to_csrow(k) container_of(k, struct csrow_info, kobj)
209#define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
210
211/* Set of show/store higher level functions for default csrow attributes */
212static ssize_t csrowdev_show(struct kobject *kobj,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700213 struct attribute *attr, char *buffer)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700214{
215 struct csrow_info *csrow = to_csrow(kobj);
216 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
217
218 if (csrowdev_attr->show)
219 return csrowdev_attr->show(csrow,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700220 buffer, csrowdev_attr->private);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700221 return -EIO;
222}
223
224static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700225 const char *buffer, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700226{
227 struct csrow_info *csrow = to_csrow(kobj);
Douglas Thompson079708b2007-07-19 01:49:58 -0700228 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700229
230 if (csrowdev_attr->store)
231 return csrowdev_attr->store(csrow,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700232 buffer,
233 count, csrowdev_attr->private);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700234 return -EIO;
235}
236
Emese Revfy52cf25d2010-01-19 02:58:23 +0100237static const struct sysfs_ops csrowfs_ops = {
Douglas Thompson079708b2007-07-19 01:49:58 -0700238 .show = csrowdev_show,
239 .store = csrowdev_store
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700240};
241
242#define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \
243static struct csrowdev_attribute attr_##_name = { \
244 .attr = {.name = __stringify(_name), .mode = _mode }, \
245 .show = _show, \
246 .store = _store, \
247 .private = _private, \
248};
249
250/* default cwrow<id>/attribute files */
Douglas Thompson079708b2007-07-19 01:49:58 -0700251CSROWDEV_ATTR(size_mb, S_IRUGO, csrow_size_show, NULL, 0);
252CSROWDEV_ATTR(dev_type, S_IRUGO, csrow_dev_type_show, NULL, 0);
253CSROWDEV_ATTR(mem_type, S_IRUGO, csrow_mem_type_show, NULL, 0);
254CSROWDEV_ATTR(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL, 0);
255CSROWDEV_ATTR(ue_count, S_IRUGO, csrow_ue_count_show, NULL, 0);
256CSROWDEV_ATTR(ce_count, S_IRUGO, csrow_ce_count_show, NULL, 0);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700257
258/* default attributes of the CSROW<id> object */
259static struct csrowdev_attribute *default_csrow_attr[] = {
260 &attr_dev_type,
261 &attr_mem_type,
262 &attr_edac_mode,
263 &attr_size_mb,
264 &attr_ue_count,
265 &attr_ce_count,
266 NULL,
267};
268
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700269/* possible dynamic channel DIMM Label attribute files */
Douglas Thompson079708b2007-07-19 01:49:58 -0700270CSROWDEV_ATTR(ch0_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700271 channel_dimm_label_show, channel_dimm_label_store, 0);
Douglas Thompson079708b2007-07-19 01:49:58 -0700272CSROWDEV_ATTR(ch1_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700273 channel_dimm_label_show, channel_dimm_label_store, 1);
Douglas Thompson079708b2007-07-19 01:49:58 -0700274CSROWDEV_ATTR(ch2_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700275 channel_dimm_label_show, channel_dimm_label_store, 2);
Douglas Thompson079708b2007-07-19 01:49:58 -0700276CSROWDEV_ATTR(ch3_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700277 channel_dimm_label_show, channel_dimm_label_store, 3);
Douglas Thompson079708b2007-07-19 01:49:58 -0700278CSROWDEV_ATTR(ch4_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700279 channel_dimm_label_show, channel_dimm_label_store, 4);
Douglas Thompson079708b2007-07-19 01:49:58 -0700280CSROWDEV_ATTR(ch5_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700281 channel_dimm_label_show, channel_dimm_label_store, 5);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700282
283/* Total possible dynamic DIMM Label attribute file table */
284static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
Douglas Thompson079708b2007-07-19 01:49:58 -0700285 &attr_ch0_dimm_label,
286 &attr_ch1_dimm_label,
287 &attr_ch2_dimm_label,
288 &attr_ch3_dimm_label,
289 &attr_ch4_dimm_label,
290 &attr_ch5_dimm_label
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700291};
292
293/* possible dynamic channel ce_count attribute files */
Douglas Thompson079708b2007-07-19 01:49:58 -0700294CSROWDEV_ATTR(ch0_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 0);
295CSROWDEV_ATTR(ch1_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 1);
296CSROWDEV_ATTR(ch2_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 2);
297CSROWDEV_ATTR(ch3_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 3);
298CSROWDEV_ATTR(ch4_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 4);
299CSROWDEV_ATTR(ch5_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 5);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700300
301/* Total possible dynamic ce_count attribute file table */
302static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
Douglas Thompson079708b2007-07-19 01:49:58 -0700303 &attr_ch0_ce_count,
304 &attr_ch1_ce_count,
305 &attr_ch2_ce_count,
306 &attr_ch3_ce_count,
307 &attr_ch4_ce_count,
308 &attr_ch5_ce_count
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700309};
310
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700311#define EDAC_NR_CHANNELS 6
312
313/* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */
314static int edac_create_channel_files(struct kobject *kobj, int chan)
315{
Douglas Thompson079708b2007-07-19 01:49:58 -0700316 int err = -ENODEV;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700317
318 if (chan >= EDAC_NR_CHANNELS)
319 return err;
320
321 /* create the DIMM label attribute file */
322 err = sysfs_create_file(kobj,
Douglas Thompson079708b2007-07-19 01:49:58 -0700323 (struct attribute *)
324 dynamic_csrow_dimm_attr[chan]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700325
326 if (!err) {
327 /* create the CE Count attribute file */
328 err = sysfs_create_file(kobj,
Douglas Thompson079708b2007-07-19 01:49:58 -0700329 (struct attribute *)
330 dynamic_csrow_ce_count_attr[chan]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700331 } else {
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700332 debugf1("%s() dimm labels and ce_count files created",
333 __func__);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700334 }
335
336 return err;
337}
338
339/* No memory to release for this kobj */
340static void edac_csrow_instance_release(struct kobject *kobj)
341{
Doug Thompson8096cfa2007-07-19 01:50:27 -0700342 struct mem_ctl_info *mci;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700343 struct csrow_info *cs;
344
Doug Thompson8096cfa2007-07-19 01:50:27 -0700345 debugf1("%s()\n", __func__);
346
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700347 cs = container_of(kobj, struct csrow_info, kobj);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700348 mci = cs->mci;
349
350 kobject_put(&mci->edac_mci_kobj);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700351}
352
353/* the kobj_type instance for a CSROW */
354static struct kobj_type ktype_csrow = {
355 .release = edac_csrow_instance_release,
356 .sysfs_ops = &csrowfs_ops,
Douglas Thompson079708b2007-07-19 01:49:58 -0700357 .default_attrs = (struct attribute **)default_csrow_attr,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700358};
359
360/* Create a CSROW object under specifed edac_mc_device */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700361static int edac_create_csrow_object(struct mem_ctl_info *mci,
362 struct csrow_info *csrow, int index)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700363{
Doug Thompson8096cfa2007-07-19 01:50:27 -0700364 struct kobject *kobj_mci = &mci->edac_mci_kobj;
365 struct kobject *kobj;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700366 int chan;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700367 int err;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700368
369 /* generate ..../edac/mc/mc<id>/csrow<index> */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700370 memset(&csrow->kobj, 0, sizeof(csrow->kobj));
371 csrow->mci = mci; /* include container up link */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700372
373 /* bump the mci instance's kobject's ref count */
374 kobj = kobject_get(&mci->edac_mci_kobj);
375 if (!kobj) {
376 err = -ENODEV;
377 goto err_out;
378 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700379
380 /* Instanstiate the csrow object */
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400381 err = kobject_init_and_add(&csrow->kobj, &ktype_csrow, kobj_mci,
382 "csrow%d", index);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700383 if (err)
384 goto err_release_top_kobj;
385
386 /* At this point, to release a csrow kobj, one must
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800387 * call the kobject_put and allow that tear down
Doug Thompson8096cfa2007-07-19 01:50:27 -0700388 * to work the releasing
389 */
390
391 /* Create the dyanmic attribute files on this csrow,
392 * namely, the DIMM labels and the channel ce_count
393 */
394 for (chan = 0; chan < csrow->nr_channels; chan++) {
395 err = edac_create_channel_files(&csrow->kobj, chan);
396 if (err) {
397 /* special case the unregister here */
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800398 kobject_put(&csrow->kobj);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700399 goto err_out;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700400 }
401 }
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400402 kobject_uevent(&csrow->kobj, KOBJ_ADD);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700403 return 0;
404
405 /* error unwind stack */
406err_release_top_kobj:
407 kobject_put(&mci->edac_mci_kobj);
408
409err_out:
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700410 return err;
411}
412
413/* default sysfs methods and data structures for the main MCI kobject */
414
415static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
Douglas Thompson079708b2007-07-19 01:49:58 -0700416 const char *data, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700417{
418 int row, chan;
419
420 mci->ue_noinfo_count = 0;
421 mci->ce_noinfo_count = 0;
422 mci->ue_count = 0;
423 mci->ce_count = 0;
424
425 for (row = 0; row < mci->nr_csrows; row++) {
426 struct csrow_info *ri = &mci->csrows[row];
427
428 ri->ue_count = 0;
429 ri->ce_count = 0;
430
431 for (chan = 0; chan < ri->nr_channels; chan++)
432 ri->channels[chan].ce_count = 0;
433 }
434
435 mci->start_time = jiffies;
436 return count;
437}
438
439/* memory scrubbing */
440static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci,
Borislav Petkoveba042a2010-05-25 18:21:07 +0200441 const char *data, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700442{
Borislav Petkoveba042a2010-05-25 18:21:07 +0200443 unsigned long bandwidth = 0;
444 int err;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700445
Borislav Petkoveba042a2010-05-25 18:21:07 +0200446 if (!mci->set_sdram_scrub_rate) {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700447 edac_printk(KERN_WARNING, EDAC_MC,
Borislav Petkoveba042a2010-05-25 18:21:07 +0200448 "Memory scrub rate setting not implemented!\n");
449 return -EINVAL;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700450 }
Borislav Petkoveba042a2010-05-25 18:21:07 +0200451
452 if (strict_strtoul(data, 10, &bandwidth) < 0)
453 return -EINVAL;
454
455 err = mci->set_sdram_scrub_rate(mci, (u32)bandwidth);
456 if (err) {
457 edac_printk(KERN_DEBUG, EDAC_MC,
458 "Failed setting scrub rate to %lu\n", bandwidth);
459 return -EINVAL;
460 }
461 else {
462 edac_printk(KERN_DEBUG, EDAC_MC,
463 "Scrub rate set to: %lu\n", bandwidth);
464 return count;
465 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700466}
467
468static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data)
469{
Borislav Petkoveba042a2010-05-25 18:21:07 +0200470 u32 bandwidth = 0;
471 int err;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700472
Borislav Petkoveba042a2010-05-25 18:21:07 +0200473 if (!mci->get_sdram_scrub_rate) {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700474 edac_printk(KERN_WARNING, EDAC_MC,
Borislav Petkoveba042a2010-05-25 18:21:07 +0200475 "Memory scrub rate reading not implemented\n");
476 return -EINVAL;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700477 }
Borislav Petkoveba042a2010-05-25 18:21:07 +0200478
479 err = mci->get_sdram_scrub_rate(mci, &bandwidth);
480 if (err) {
481 edac_printk(KERN_DEBUG, EDAC_MC, "Error reading scrub rate\n");
482 return err;
483 }
484 else {
485 edac_printk(KERN_DEBUG, EDAC_MC,
486 "Read scrub rate: %d\n", bandwidth);
487 return sprintf(data, "%d\n", bandwidth);
488 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700489}
490
491/* default attribute files for the MCI object */
492static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
493{
Douglas Thompson079708b2007-07-19 01:49:58 -0700494 return sprintf(data, "%d\n", mci->ue_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700495}
496
497static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
498{
Douglas Thompson079708b2007-07-19 01:49:58 -0700499 return sprintf(data, "%d\n", mci->ce_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700500}
501
502static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
503{
Douglas Thompson079708b2007-07-19 01:49:58 -0700504 return sprintf(data, "%d\n", mci->ce_noinfo_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700505}
506
507static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
508{
Douglas Thompson079708b2007-07-19 01:49:58 -0700509 return sprintf(data, "%d\n", mci->ue_noinfo_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700510}
511
512static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data)
513{
Douglas Thompson079708b2007-07-19 01:49:58 -0700514 return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700515}
516
517static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
518{
Douglas Thompson079708b2007-07-19 01:49:58 -0700519 return sprintf(data, "%s\n", mci->ctl_name);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700520}
521
522static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data)
523{
524 int total_pages, csrow_idx;
525
526 for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows;
Douglas Thompson052dfb42007-07-19 01:50:13 -0700527 csrow_idx++) {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700528 struct csrow_info *csrow = &mci->csrows[csrow_idx];
529
530 if (!csrow->nr_pages)
531 continue;
532
533 total_pages += csrow->nr_pages;
534 }
535
Douglas Thompson079708b2007-07-19 01:49:58 -0700536 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700537}
538
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700539#define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
Douglas Thompson42a8e392007-07-19 01:50:10 -0700540#define to_mcidev_attr(a) container_of(a,struct mcidev_sysfs_attribute,attr)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700541
542/* MCI show/store functions for top most object */
543static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700544 char *buffer)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700545{
546 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
Douglas Thompson42a8e392007-07-19 01:50:10 -0700547 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700548
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300549 debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
550
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700551 if (mcidev_attr->show)
552 return mcidev_attr->show(mem_ctl_info, buffer);
553
554 return -EIO;
555}
556
557static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700558 const char *buffer, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700559{
560 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
Douglas Thompson42a8e392007-07-19 01:50:10 -0700561 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700562
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300563 debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
564
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700565 if (mcidev_attr->store)
566 return mcidev_attr->store(mem_ctl_info, buffer, count);
567
568 return -EIO;
569}
570
Doug Thompson8096cfa2007-07-19 01:50:27 -0700571/* Intermediate show/store table */
Emese Revfy52cf25d2010-01-19 02:58:23 +0100572static const struct sysfs_ops mci_ops = {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700573 .show = mcidev_show,
574 .store = mcidev_store
575};
576
577#define MCIDEV_ATTR(_name,_mode,_show,_store) \
Douglas Thompson42a8e392007-07-19 01:50:10 -0700578static struct mcidev_sysfs_attribute mci_attr_##_name = { \
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700579 .attr = {.name = __stringify(_name), .mode = _mode }, \
580 .show = _show, \
581 .store = _store, \
582};
583
584/* default Control file */
Douglas Thompson079708b2007-07-19 01:49:58 -0700585MCIDEV_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700586
587/* default Attribute files */
Douglas Thompson079708b2007-07-19 01:49:58 -0700588MCIDEV_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
589MCIDEV_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
590MCIDEV_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
591MCIDEV_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
592MCIDEV_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
593MCIDEV_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
594MCIDEV_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700595
596/* memory scrubber attribute file */
Douglas Thompson079708b2007-07-19 01:49:58 -0700597MCIDEV_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700598 mci_sdram_scrub_rate_store);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700599
Douglas Thompson42a8e392007-07-19 01:50:10 -0700600static struct mcidev_sysfs_attribute *mci_attr[] = {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700601 &mci_attr_reset_counters,
602 &mci_attr_mc_name,
603 &mci_attr_size_mb,
604 &mci_attr_seconds_since_reset,
605 &mci_attr_ue_noinfo_count,
606 &mci_attr_ce_noinfo_count,
607 &mci_attr_ue_count,
608 &mci_attr_ce_count,
609 &mci_attr_sdram_scrub_rate,
610 NULL
611};
612
Doug Thompson8096cfa2007-07-19 01:50:27 -0700613
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700614/*
615 * Release of a MC controlling instance
Doug Thompson8096cfa2007-07-19 01:50:27 -0700616 *
617 * each MC control instance has the following resources upon entry:
618 * a) a ref count on the top memctl kobj
619 * b) a ref count on this module
620 *
621 * this function must decrement those ref counts and then
622 * issue a free on the instance's memory
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700623 */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700624static void edac_mci_control_release(struct kobject *kobj)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700625{
626 struct mem_ctl_info *mci;
627
628 mci = to_mci(kobj);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700629
630 debugf0("%s() mci instance idx=%d releasing\n", __func__, mci->mc_idx);
631
632 /* decrement the module ref count */
633 module_put(mci->owner);
634
635 /* free the mci instance memory here */
636 kfree(mci);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700637}
638
639static struct kobj_type ktype_mci = {
Doug Thompson8096cfa2007-07-19 01:50:27 -0700640 .release = edac_mci_control_release,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700641 .sysfs_ops = &mci_ops,
Douglas Thompson079708b2007-07-19 01:49:58 -0700642 .default_attrs = (struct attribute **)mci_attr,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700643};
644
Doug Thompson8096cfa2007-07-19 01:50:27 -0700645/* EDAC memory controller sysfs kset:
646 * /sys/devices/system/edac/mc
647 */
Arthur Jonesf9fc82a2008-07-25 01:49:11 -0700648static struct kset *mc_kset;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700649
650/*
651 * edac_mc_register_sysfs_main_kobj
652 *
653 * setups and registers the main kobject for each mci
654 */
655int edac_mc_register_sysfs_main_kobj(struct mem_ctl_info *mci)
656{
657 struct kobject *kobj_mci;
658 int err;
659
660 debugf1("%s()\n", __func__);
661
662 kobj_mci = &mci->edac_mci_kobj;
663
664 /* Init the mci's kobject */
665 memset(kobj_mci, 0, sizeof(*kobj_mci));
666
Doug Thompson8096cfa2007-07-19 01:50:27 -0700667 /* Record which module 'owns' this control structure
668 * and bump the ref count of the module
669 */
670 mci->owner = THIS_MODULE;
671
672 /* bump ref count on this module */
673 if (!try_module_get(mci->owner)) {
674 err = -ENODEV;
675 goto fail_out;
676 }
677
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400678 /* this instance become part of the mc_kset */
Arthur Jonesf9fc82a2008-07-25 01:49:11 -0700679 kobj_mci->kset = mc_kset;
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400680
Doug Thompson8096cfa2007-07-19 01:50:27 -0700681 /* register the mc<id> kobject to the mc_kset */
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400682 err = kobject_init_and_add(kobj_mci, &ktype_mci, NULL,
683 "mc%d", mci->mc_idx);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700684 if (err) {
685 debugf1("%s()Failed to register '.../edac/mc%d'\n",
686 __func__, mci->mc_idx);
687 goto kobj_reg_fail;
688 }
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400689 kobject_uevent(kobj_mci, KOBJ_ADD);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700690
691 /* At this point, to 'free' the control struct,
692 * edac_mc_unregister_sysfs_main_kobj() must be used
693 */
694
695 debugf1("%s() Registered '.../edac/mc%d' kobject\n",
696 __func__, mci->mc_idx);
697
698 return 0;
699
700 /* Error exit stack */
701
702kobj_reg_fail:
703 module_put(mci->owner);
704
705fail_out:
706 return err;
707}
708
709/*
710 * edac_mc_register_sysfs_main_kobj
711 *
712 * tears down and the main mci kobject from the mc_kset
713 */
714void edac_mc_unregister_sysfs_main_kobj(struct mem_ctl_info *mci)
715{
716 /* delete the kobj from the mc_kset */
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800717 kobject_put(&mci->edac_mci_kobj);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700718}
719
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700720#define EDAC_DEVICE_SYMLINK "device"
721
Mauro Carvalho Chehabb9687592009-09-25 13:42:25 -0300722#define grp_to_mci(k) (container_of(k, struct mcidev_sysfs_group_kobj, kobj)->mci)
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300723
724/* MCI show/store functions for top most object */
725static ssize_t inst_grp_show(struct kobject *kobj, struct attribute *attr,
726 char *buffer)
727{
728 struct mem_ctl_info *mem_ctl_info = grp_to_mci(kobj);
729 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
730
731 debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
732
733 if (mcidev_attr->show)
734 return mcidev_attr->show(mem_ctl_info, buffer);
735
736 return -EIO;
737}
738
739static ssize_t inst_grp_store(struct kobject *kobj, struct attribute *attr,
740 const char *buffer, size_t count)
741{
742 struct mem_ctl_info *mem_ctl_info = grp_to_mci(kobj);
743 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
744
745 debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
746
747 if (mcidev_attr->store)
748 return mcidev_attr->store(mem_ctl_info, buffer, count);
749
750 return -EIO;
751}
752
753/* No memory to release for this kobj */
754static void edac_inst_grp_release(struct kobject *kobj)
755{
Mauro Carvalho Chehabb9687592009-09-25 13:42:25 -0300756 struct mcidev_sysfs_group_kobj *grp;
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300757 struct mem_ctl_info *mci;
758
759 debugf1("%s()\n", __func__);
760
Mauro Carvalho Chehabb9687592009-09-25 13:42:25 -0300761 grp = container_of(kobj, struct mcidev_sysfs_group_kobj, kobj);
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300762 mci = grp->mci;
763
764 kobject_put(&mci->edac_mci_kobj);
765}
766
767/* Intermediate show/store table */
768static struct sysfs_ops inst_grp_ops = {
769 .show = inst_grp_show,
770 .store = inst_grp_store
771};
772
773/* the kobj_type instance for a instance group */
774static struct kobj_type ktype_inst_grp = {
775 .release = edac_inst_grp_release,
776 .sysfs_ops = &inst_grp_ops,
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300777};
778
779
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700780/*
Doug Thompson8096cfa2007-07-19 01:50:27 -0700781 * edac_create_mci_instance_attributes
Mauro Carvalho Chehab9fa2fc2e2009-09-23 16:26:09 -0300782 * create MC driver specific attributes bellow an specified kobj
783 * This routine calls itself recursively, in order to create an entire
784 * object tree.
Douglas Thompson42a8e392007-07-19 01:50:10 -0700785 */
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300786static int edac_create_mci_instance_attributes(struct mem_ctl_info *mci,
Mauro Carvalho Chehab9fa2fc2e2009-09-23 16:26:09 -0300787 struct mcidev_sysfs_attribute *sysfs_attrib,
788 struct kobject *kobj)
Douglas Thompson42a8e392007-07-19 01:50:10 -0700789{
790 int err;
Douglas Thompson42a8e392007-07-19 01:50:10 -0700791
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300792 debugf1("%s()\n", __func__);
793
Mauro Carvalho Chehab9fa2fc2e2009-09-23 16:26:09 -0300794 while (sysfs_attrib) {
795 if (sysfs_attrib->grp) {
Mauro Carvalho Chehabb9687592009-09-25 13:42:25 -0300796 struct mcidev_sysfs_group_kobj *grp_kobj;
797
798 grp_kobj = kzalloc(sizeof(*grp_kobj), GFP_KERNEL);
799 if (!grp_kobj)
800 return -ENOMEM;
801
802 list_add_tail(&grp_kobj->list, &mci->grp_kobj_list);
803
804 grp_kobj->grp = sysfs_attrib->grp;
805 grp_kobj->mci = mci;
Mauro Carvalho Chehabc419d922009-09-24 16:36:32 -0300806
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300807 debugf0("%s() grp %s, mci %p\n", __func__,
808 sysfs_attrib->grp->name, mci);
Douglas Thompson42a8e392007-07-19 01:50:10 -0700809
Mauro Carvalho Chehabb9687592009-09-25 13:42:25 -0300810 err = kobject_init_and_add(&grp_kobj->kobj,
811 &ktype_inst_grp,
Mauro Carvalho Chehabc419d922009-09-24 16:36:32 -0300812 &mci->edac_mci_kobj,
Mauro Carvalho Chehab9fa2fc2e2009-09-23 16:26:09 -0300813 sysfs_attrib->grp->name);
814 if (err)
815 return err;
816
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300817 err = edac_create_mci_instance_attributes(mci,
Mauro Carvalho Chehabb9687592009-09-25 13:42:25 -0300818 grp_kobj->grp->mcidev_attr,
819 &grp_kobj->kobj);
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300820
Mauro Carvalho Chehab9fa2fc2e2009-09-23 16:26:09 -0300821 if (err)
822 return err;
823 } else if (sysfs_attrib->attr.name) {
824 debugf0("%s() file %s\n", __func__,
825 sysfs_attrib->attr.name);
826
827 err = sysfs_create_file(kobj, &sysfs_attrib->attr);
828 } else
829 break;
830
Douglas Thompson42a8e392007-07-19 01:50:10 -0700831 if (err) {
832 return err;
833 }
Douglas Thompson42a8e392007-07-19 01:50:10 -0700834 sysfs_attrib++;
835 }
836
837 return 0;
838}
839
840/*
Doug Thompson8096cfa2007-07-19 01:50:27 -0700841 * edac_remove_mci_instance_attributes
842 * remove MC driver specific attributes at the topmost level
843 * directory of this mci instance.
844 */
Mauro Carvalho Chehabb9687592009-09-25 13:42:25 -0300845static void edac_remove_mci_instance_attributes(struct mem_ctl_info *mci,
Mauro Carvalho Chehab9fa2fc2e2009-09-23 16:26:09 -0300846 struct mcidev_sysfs_attribute *sysfs_attrib,
Mauro Carvalho Chehabb9687592009-09-25 13:42:25 -0300847 struct kobject *kobj, int count)
Doug Thompson8096cfa2007-07-19 01:50:27 -0700848{
Mauro Carvalho Chehabb9687592009-09-25 13:42:25 -0300849 struct mcidev_sysfs_group_kobj *grp_kobj, *tmp;
850
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300851 debugf1("%s()\n", __func__);
852
Mauro Carvalho Chehabb9687592009-09-25 13:42:25 -0300853 /*
854 * loop if there are attributes and until we hit a NULL entry
855 * Remove first all the atributes
856 */
Mauro Carvalho Chehab9fa2fc2e2009-09-23 16:26:09 -0300857 while (sysfs_attrib) {
858 if (sysfs_attrib->grp) {
Mauro Carvalho Chehabb9687592009-09-25 13:42:25 -0300859 list_for_each_entry(grp_kobj, &mci->grp_kobj_list,
860 list)
861 if (grp_kobj->grp == sysfs_attrib->grp)
862 edac_remove_mci_instance_attributes(mci,
863 grp_kobj->grp->mcidev_attr,
864 &grp_kobj->kobj, count + 1);
865 } else if (sysfs_attrib->attr.name) {
Mauro Carvalho Chehab9fa2fc2e2009-09-23 16:26:09 -0300866 debugf0("%s() file %s\n", __func__,
867 sysfs_attrib->attr.name);
868 sysfs_remove_file(kobj, &sysfs_attrib->attr);
869 } else
870 break;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700871 sysfs_attrib++;
872 }
Mauro Carvalho Chehabb9687592009-09-25 13:42:25 -0300873
874 /*
875 * Now that all attributes got removed, it is save to remove all groups
876 */
877 if (!count)
878 list_for_each_entry_safe(grp_kobj, tmp, &mci->grp_kobj_list,
879 list) {
880 debugf0("%s() grp %s\n", __func__, grp_kobj->grp->name);
881 kobject_put(&grp_kobj->kobj);
882 }
Doug Thompson8096cfa2007-07-19 01:50:27 -0700883}
884
885
886/*
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700887 * Create a new Memory Controller kobject instance,
888 * mc<id> under the 'mc' directory
889 *
890 * Return:
891 * 0 Success
892 * !0 Failure
893 */
894int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
895{
896 int i;
897 int err;
898 struct csrow_info *csrow;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700899 struct kobject *kobj_mci = &mci->edac_mci_kobj;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700900
901 debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700902
Mauro Carvalho Chehabb9687592009-09-25 13:42:25 -0300903 INIT_LIST_HEAD(&mci->grp_kobj_list);
904
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700905 /* create a symlink for the device */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700906 err = sysfs_create_link(kobj_mci, &mci->dev->kobj,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700907 EDAC_DEVICE_SYMLINK);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700908 if (err) {
909 debugf1("%s() failure to create symlink\n", __func__);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700910 goto fail0;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700911 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700912
Douglas Thompson42a8e392007-07-19 01:50:10 -0700913 /* If the low level driver desires some attributes,
914 * then create them now for the driver.
915 */
916 if (mci->mc_driver_sysfs_attributes) {
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300917 err = edac_create_mci_instance_attributes(mci,
Mauro Carvalho Chehab9fa2fc2e2009-09-23 16:26:09 -0300918 mci->mc_driver_sysfs_attributes,
919 &mci->edac_mci_kobj);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700920 if (err) {
921 debugf1("%s() failure to create mci attributes\n",
922 __func__);
Douglas Thompson42a8e392007-07-19 01:50:10 -0700923 goto fail0;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700924 }
Douglas Thompson42a8e392007-07-19 01:50:10 -0700925 }
926
Doug Thompson8096cfa2007-07-19 01:50:27 -0700927 /* Make directories for each CSROW object under the mc<id> kobject
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700928 */
929 for (i = 0; i < mci->nr_csrows; i++) {
930 csrow = &mci->csrows[i];
931
932 /* Only expose populated CSROWs */
933 if (csrow->nr_pages > 0) {
Doug Thompson8096cfa2007-07-19 01:50:27 -0700934 err = edac_create_csrow_object(mci, csrow, i);
935 if (err) {
936 debugf1("%s() failure: create csrow %d obj\n",
937 __func__, i);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700938 goto fail1;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700939 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700940 }
941 }
942
943 return 0;
944
945 /* CSROW error: backout what has already been registered, */
Douglas Thompson052dfb42007-07-19 01:50:13 -0700946fail1:
Douglas Thompson079708b2007-07-19 01:49:58 -0700947 for (i--; i >= 0; i--) {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700948 if (csrow->nr_pages > 0) {
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800949 kobject_put(&mci->csrows[i].kobj);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700950 }
951 }
952
Doug Thompson8096cfa2007-07-19 01:50:27 -0700953 /* remove the mci instance's attributes, if any */
Mauro Carvalho Chehabb9687592009-09-25 13:42:25 -0300954 edac_remove_mci_instance_attributes(mci,
955 mci->mc_driver_sysfs_attributes, &mci->edac_mci_kobj, 0);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700956
957 /* remove the symlink */
958 sysfs_remove_link(kobj_mci, EDAC_DEVICE_SYMLINK);
959
Douglas Thompson052dfb42007-07-19 01:50:13 -0700960fail0:
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700961 return err;
962}
963
964/*
965 * remove a Memory Controller instance
966 */
967void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
968{
969 int i;
970
971 debugf0("%s()\n", __func__);
972
973 /* remove all csrow kobjects */
974 for (i = 0; i < mci->nr_csrows; i++) {
975 if (mci->csrows[i].nr_pages > 0) {
Doug Thompson8096cfa2007-07-19 01:50:27 -0700976 debugf0("%s() unreg csrow-%d\n", __func__, i);
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800977 kobject_put(&mci->csrows[i].kobj);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700978 }
979 }
980
Doug Thompson8096cfa2007-07-19 01:50:27 -0700981 debugf0("%s() remove_link\n", __func__);
982
983 /* remove the symlink */
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700984 sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700985
986 debugf0("%s() remove_mci_instance\n", __func__);
987
988 /* remove this mci instance's attribtes */
Mauro Carvalho Chehabb9687592009-09-25 13:42:25 -0300989 edac_remove_mci_instance_attributes(mci,
990 mci->mc_driver_sysfs_attributes,
991 &mci->edac_mci_kobj, 0);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700992 debugf0("%s() unregister this mci kobj\n", __func__);
993
994 /* unregister this instance's kobject */
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800995 kobject_put(&mci->edac_mci_kobj);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700996}
Doug Thompson8096cfa2007-07-19 01:50:27 -0700997
998
999
1000
1001/*
1002 * edac_setup_sysfs_mc_kset(void)
1003 *
1004 * Initialize the mc_kset for the 'mc' entry
1005 * This requires creating the top 'mc' directory with a kset
1006 * and its controls/attributes.
1007 *
1008 * To this 'mc' kset, instance 'mci' will be grouped as children.
1009 *
1010 * Return: 0 SUCCESS
1011 * !0 FAILURE error code
1012 */
1013int edac_sysfs_setup_mc_kset(void)
1014{
Borislav Petkovca755e02010-09-01 16:32:20 +02001015 int err = -EINVAL;
Doug Thompson8096cfa2007-07-19 01:50:27 -07001016 struct sysdev_class *edac_class;
1017
1018 debugf1("%s()\n", __func__);
1019
1020 /* get the /sys/devices/system/edac class reference */
Borislav Petkov30e1f7a2010-09-02 17:26:48 +02001021 edac_class = edac_get_sysfs_class();
Doug Thompson8096cfa2007-07-19 01:50:27 -07001022 if (edac_class == NULL) {
1023 debugf1("%s() no edac_class error=%d\n", __func__, err);
1024 goto fail_out;
1025 }
1026
1027 /* Init the MC's kobject */
Arthur Jonesf9fc82a2008-07-25 01:49:11 -07001028 mc_kset = kset_create_and_add("mc", NULL, &edac_class->kset.kobj);
1029 if (!mc_kset) {
1030 err = -ENOMEM;
Doug Thompson8096cfa2007-07-19 01:50:27 -07001031 debugf1("%s() Failed to register '.../edac/mc'\n", __func__);
Borislav Petkov30e1f7a2010-09-02 17:26:48 +02001032 goto fail_kset;
Doug Thompson8096cfa2007-07-19 01:50:27 -07001033 }
1034
1035 debugf1("%s() Registered '.../edac/mc' kobject\n", __func__);
1036
1037 return 0;
1038
Borislav Petkov30e1f7a2010-09-02 17:26:48 +02001039fail_kset:
1040 edac_put_sysfs_class();
Doug Thompson8096cfa2007-07-19 01:50:27 -07001041
Doug Thompson8096cfa2007-07-19 01:50:27 -07001042fail_out:
1043 return err;
1044}
1045
1046/*
1047 * edac_sysfs_teardown_mc_kset
1048 *
1049 * deconstruct the mc_ket for memory controllers
1050 */
1051void edac_sysfs_teardown_mc_kset(void)
1052{
Arthur Jonesf9fc82a2008-07-25 01:49:11 -07001053 kset_unregister(mc_kset);
Borislav Petkov30e1f7a2010-09-02 17:26:48 +02001054 edac_put_sysfs_class();
Doug Thompson8096cfa2007-07-19 01:50:27 -07001055}
1056