blob: 418b65f1a1da858c5b127c863ced032f773424e1 [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>
Doug Thompson8096cfa2007-07-19 01:50:27 -070014#include <linux/bug.h>
Douglas Thompson7c9281d2007-07-19 01:49:33 -070015
Douglas Thompson20bcb7a2007-07-19 01:49:47 -070016#include "edac_core.h"
Douglas Thompson7c9281d2007-07-19 01:49:33 -070017#include "edac_module.h"
18
Doug Thompson8096cfa2007-07-19 01:50:27 -070019
Douglas Thompson7c9281d2007-07-19 01:49:33 -070020/* MC EDAC Controls, setable by module parameter, and sysfs */
Dave Jiang4de78c62007-07-19 01:49:54 -070021static int edac_mc_log_ue = 1;
22static int edac_mc_log_ce = 1;
Douglas Thompsonf0440912007-07-19 01:50:19 -070023static int edac_mc_panic_on_ue;
Dave Jiang4de78c62007-07-19 01:49:54 -070024static int edac_mc_poll_msec = 1000;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070025
26/* Getter functions for above */
Dave Jiang4de78c62007-07-19 01:49:54 -070027int edac_mc_get_log_ue(void)
Douglas Thompson7c9281d2007-07-19 01:49:33 -070028{
Dave Jiang4de78c62007-07-19 01:49:54 -070029 return edac_mc_log_ue;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070030}
31
Dave Jiang4de78c62007-07-19 01:49:54 -070032int edac_mc_get_log_ce(void)
Douglas Thompson7c9281d2007-07-19 01:49:33 -070033{
Dave Jiang4de78c62007-07-19 01:49:54 -070034 return edac_mc_log_ce;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070035}
36
Dave Jiang4de78c62007-07-19 01:49:54 -070037int edac_mc_get_panic_on_ue(void)
Douglas Thompson7c9281d2007-07-19 01:49:33 -070038{
Dave Jiang4de78c62007-07-19 01:49:54 -070039 return edac_mc_panic_on_ue;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070040}
41
Dave Jiang81d87cb2007-07-19 01:49:52 -070042/* this is temporary */
43int edac_mc_get_poll_msec(void)
44{
Dave Jiang4de78c62007-07-19 01:49:54 -070045 return edac_mc_poll_msec;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070046}
47
Arthur Jones096846e2008-07-25 01:49:09 -070048static 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
Douglas Thompson7c9281d2007-07-19 01:49:33 -070067/* Parameter declarations for above */
Dave Jiang4de78c62007-07-19 01:49:54 -070068module_param(edac_mc_panic_on_ue, int, 0644);
69MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
70module_param(edac_mc_log_ue, int, 0644);
71MODULE_PARM_DESC(edac_mc_log_ue,
Douglas Thompson079708b2007-07-19 01:49:58 -070072 "Log uncorrectable error to console: 0=off 1=on");
Dave Jiang4de78c62007-07-19 01:49:54 -070073module_param(edac_mc_log_ce, int, 0644);
74MODULE_PARM_DESC(edac_mc_log_ce,
Douglas Thompson079708b2007-07-19 01:49:58 -070075 "Log correctable error to console: 0=off 1=on");
Arthur Jones096846e2008-07-25 01:49:09 -070076module_param_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_int,
77 &edac_mc_poll_msec, 0644);
Dave Jiang4de78c62007-07-19 01:49:54 -070078MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
Douglas Thompson7c9281d2007-07-19 01:49:33 -070079
Douglas Thompson7c9281d2007-07-19 01:49:33 -070080/*
81 * various constants for Memory Controllers
82 */
83static 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",
Dave Jiang1a9b85e2007-07-19 01:49:38 -070094 [MEM_RMBS] = "RMBS",
95 [MEM_DDR2] = "Unbuffered-DDR2",
96 [MEM_FB_DDR2] = "FullyBuffered-DDR2",
Benjamin Herrenschmidt1d5f7262008-02-07 00:14:52 -080097 [MEM_RDDR2] = "Registered-DDR2",
Yang Shib1cfebc2009-06-30 11:41:22 -070098 [MEM_XDR] = "XDR",
99 [MEM_DDR3] = "Unbuffered-DDR3",
100 [MEM_RDDR3] = "Registered-DDR3"
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700101};
102
103static 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
114static 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
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700127
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700128
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700129static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count)
130{
Douglas Thompson079708b2007-07-19 01:49:58 -0700131 int *value = (int *)ptr;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700132
133 if (isdigit(*buffer))
134 *value = simple_strtoul(buffer, NULL, 0);
135
136 return count;
137}
138
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700139
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700140/* EDAC sysfs CSROW data structures and methods
141 */
142
143/* Set of more default csrow<id> attribute show/store functions */
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700144static ssize_t csrow_ue_count_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", csrow->ue_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700148}
149
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700150static ssize_t csrow_ce_count_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, "%u\n", csrow->ce_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700154}
155
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700156static ssize_t csrow_size_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, "%u\n", PAGES_TO_MiB(csrow->nr_pages));
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700160}
161
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700162static ssize_t csrow_mem_type_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", mem_types[csrow->mtype]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700166}
167
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700168static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700169 int private)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700170{
Douglas Thompson079708b2007-07-19 01:49:58 -0700171 return sprintf(data, "%s\n", dev_types[csrow->dtype]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700172}
173
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700174static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700175 int private)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700176{
Douglas Thompson079708b2007-07-19 01:49:58 -0700177 return sprintf(data, "%s\n", edac_caps[csrow->edac_mode]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700178}
179
180/* show/store functions for DIMM Label attributes */
181static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700182 char *data, int channel)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700183{
Arthur Jones124682c2008-07-25 01:49:12 -0700184 /* 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",
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700189 csrow->channels[channel].label);
190}
191
192static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
Douglas Thompson079708b2007-07-19 01:49:58 -0700193 const char *data,
194 size_t count, int channel)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700195{
196 ssize_t max_size = 0;
197
Douglas Thompson079708b2007-07-19 01:49:58 -0700198 max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700199 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 */
206static ssize_t channel_ce_count_show(struct csrow_info *csrow,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700207 char *data, int channel)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700208{
209 return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
210}
211
212/* csrow specific attribute structure */
213struct csrowdev_attribute {
214 struct attribute attr;
Douglas Thompson079708b2007-07-19 01:49:58 -0700215 ssize_t(*show) (struct csrow_info *, char *, int);
216 ssize_t(*store) (struct csrow_info *, const char *, size_t, int);
217 int private;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700218};
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 */
224static ssize_t csrowdev_show(struct kobject *kobj,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700225 struct attribute *attr, char *buffer)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700226{
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,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700232 buffer, csrowdev_attr->private);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700233 return -EIO;
234}
235
236static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700237 const char *buffer, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700238{
239 struct csrow_info *csrow = to_csrow(kobj);
Douglas Thompson079708b2007-07-19 01:49:58 -0700240 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700241
242 if (csrowdev_attr->store)
243 return csrowdev_attr->store(csrow,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700244 buffer,
245 count, csrowdev_attr->private);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700246 return -EIO;
247}
248
Emese Revfy52cf25d2010-01-19 02:58:23 +0100249static const struct sysfs_ops csrowfs_ops = {
Douglas Thompson079708b2007-07-19 01:49:58 -0700250 .show = csrowdev_show,
251 .store = csrowdev_store
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700252};
253
254#define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \
255static 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 */
Douglas Thompson079708b2007-07-19 01:49:58 -0700263CSROWDEV_ATTR(size_mb, S_IRUGO, csrow_size_show, NULL, 0);
264CSROWDEV_ATTR(dev_type, S_IRUGO, csrow_dev_type_show, NULL, 0);
265CSROWDEV_ATTR(mem_type, S_IRUGO, csrow_mem_type_show, NULL, 0);
266CSROWDEV_ATTR(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL, 0);
267CSROWDEV_ATTR(ue_count, S_IRUGO, csrow_ue_count_show, NULL, 0);
268CSROWDEV_ATTR(ce_count, S_IRUGO, csrow_ce_count_show, NULL, 0);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700269
270/* default attributes of the CSROW<id> object */
271static 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
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700281/* possible dynamic channel DIMM Label attribute files */
Douglas Thompson079708b2007-07-19 01:49:58 -0700282CSROWDEV_ATTR(ch0_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700283 channel_dimm_label_show, channel_dimm_label_store, 0);
Douglas Thompson079708b2007-07-19 01:49:58 -0700284CSROWDEV_ATTR(ch1_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700285 channel_dimm_label_show, channel_dimm_label_store, 1);
Douglas Thompson079708b2007-07-19 01:49:58 -0700286CSROWDEV_ATTR(ch2_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700287 channel_dimm_label_show, channel_dimm_label_store, 2);
Douglas Thompson079708b2007-07-19 01:49:58 -0700288CSROWDEV_ATTR(ch3_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700289 channel_dimm_label_show, channel_dimm_label_store, 3);
Douglas Thompson079708b2007-07-19 01:49:58 -0700290CSROWDEV_ATTR(ch4_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700291 channel_dimm_label_show, channel_dimm_label_store, 4);
Douglas Thompson079708b2007-07-19 01:49:58 -0700292CSROWDEV_ATTR(ch5_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700293 channel_dimm_label_show, channel_dimm_label_store, 5);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700294
295/* Total possible dynamic DIMM Label attribute file table */
296static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
Douglas Thompson079708b2007-07-19 01:49:58 -0700297 &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
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700303};
304
305/* possible dynamic channel ce_count attribute files */
Douglas Thompson079708b2007-07-19 01:49:58 -0700306CSROWDEV_ATTR(ch0_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 0);
307CSROWDEV_ATTR(ch1_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 1);
308CSROWDEV_ATTR(ch2_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 2);
309CSROWDEV_ATTR(ch3_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 3);
310CSROWDEV_ATTR(ch4_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 4);
311CSROWDEV_ATTR(ch5_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 5);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700312
313/* Total possible dynamic ce_count attribute file table */
314static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
Douglas Thompson079708b2007-07-19 01:49:58 -0700315 &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
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700321};
322
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700323#define EDAC_NR_CHANNELS 6
324
325/* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */
326static int edac_create_channel_files(struct kobject *kobj, int chan)
327{
Douglas Thompson079708b2007-07-19 01:49:58 -0700328 int err = -ENODEV;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700329
330 if (chan >= EDAC_NR_CHANNELS)
331 return err;
332
333 /* create the DIMM label attribute file */
334 err = sysfs_create_file(kobj,
Douglas Thompson079708b2007-07-19 01:49:58 -0700335 (struct attribute *)
336 dynamic_csrow_dimm_attr[chan]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700337
338 if (!err) {
339 /* create the CE Count attribute file */
340 err = sysfs_create_file(kobj,
Douglas Thompson079708b2007-07-19 01:49:58 -0700341 (struct attribute *)
342 dynamic_csrow_ce_count_attr[chan]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700343 } else {
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700344 debugf1("%s() dimm labels and ce_count files created",
345 __func__);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700346 }
347
348 return err;
349}
350
351/* No memory to release for this kobj */
352static void edac_csrow_instance_release(struct kobject *kobj)
353{
Doug Thompson8096cfa2007-07-19 01:50:27 -0700354 struct mem_ctl_info *mci;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700355 struct csrow_info *cs;
356
Doug Thompson8096cfa2007-07-19 01:50:27 -0700357 debugf1("%s()\n", __func__);
358
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700359 cs = container_of(kobj, struct csrow_info, kobj);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700360 mci = cs->mci;
361
362 kobject_put(&mci->edac_mci_kobj);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700363}
364
365/* the kobj_type instance for a CSROW */
366static struct kobj_type ktype_csrow = {
367 .release = edac_csrow_instance_release,
368 .sysfs_ops = &csrowfs_ops,
Douglas Thompson079708b2007-07-19 01:49:58 -0700369 .default_attrs = (struct attribute **)default_csrow_attr,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700370};
371
372/* Create a CSROW object under specifed edac_mc_device */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700373static int edac_create_csrow_object(struct mem_ctl_info *mci,
374 struct csrow_info *csrow, int index)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700375{
Doug Thompson8096cfa2007-07-19 01:50:27 -0700376 struct kobject *kobj_mci = &mci->edac_mci_kobj;
377 struct kobject *kobj;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700378 int chan;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700379 int err;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700380
381 /* generate ..../edac/mc/mc<id>/csrow<index> */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700382 memset(&csrow->kobj, 0, sizeof(csrow->kobj));
383 csrow->mci = mci; /* include container up link */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700384
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 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700391
392 /* Instanstiate the csrow object */
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400393 err = kobject_init_and_add(&csrow->kobj, &ktype_csrow, kobj_mci,
394 "csrow%d", index);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700395 if (err)
396 goto err_release_top_kobj;
397
398 /* At this point, to release a csrow kobj, one must
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800399 * call the kobject_put and allow that tear down
Doug Thompson8096cfa2007-07-19 01:50:27 -0700400 * 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 */
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800410 kobject_put(&csrow->kobj);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700411 goto err_out;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700412 }
413 }
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400414 kobject_uevent(&csrow->kobj, KOBJ_ADD);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700415 return 0;
416
417 /* error unwind stack */
418err_release_top_kobj:
419 kobject_put(&mci->edac_mci_kobj);
420
421err_out:
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700422 return err;
423}
424
425/* default sysfs methods and data structures for the main MCI kobject */
426
427static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
Douglas Thompson079708b2007-07-19 01:49:58 -0700428 const char *data, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700429{
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 */
452static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700453 const char *data, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700454{
455 u32 bandwidth = -1;
456
457 if (mci->set_sdram_scrub_rate) {
458
459 memctrl_int_store(&bandwidth, data, count);
460
Douglas Thompson079708b2007-07-19 01:49:58 -0700461 if (!(*mci->set_sdram_scrub_rate) (mci, &bandwidth)) {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700462 edac_printk(KERN_DEBUG, EDAC_MC,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700463 "Scrub rate set successfully, applied: %d\n",
464 bandwidth);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700465 } else {
466 /* FIXME: error codes maybe? */
467 edac_printk(KERN_DEBUG, EDAC_MC,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700468 "Scrub rate set FAILED, could not apply: %d\n",
469 bandwidth);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700470 }
471 } else {
472 /* FIXME: produce "not implemented" ERROR for user-side. */
473 edac_printk(KERN_WARNING, EDAC_MC,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700474 "Memory scrubbing 'set'control is not implemented!\n");
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700475 }
476 return count;
477}
478
479static 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) {
Douglas Thompson079708b2007-07-19 01:49:58 -0700484 if (!(*mci->get_sdram_scrub_rate) (mci, &bandwidth)) {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700485 edac_printk(KERN_DEBUG, EDAC_MC,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700486 "Scrub rate successfully, fetched: %d\n",
487 bandwidth);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700488 } else {
489 /* FIXME: error codes maybe? */
490 edac_printk(KERN_DEBUG, EDAC_MC,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700491 "Scrub rate fetch FAILED, got: %d\n",
492 bandwidth);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700493 }
494 } else {
495 /* FIXME: produce "not implemented" ERROR for user-side. */
496 edac_printk(KERN_WARNING, EDAC_MC,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700497 "Memory scrubbing 'get' control is not implemented\n");
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700498 }
499 return sprintf(data, "%d\n", bandwidth);
500}
501
502/* default attribute files for the MCI object */
503static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
504{
Douglas Thompson079708b2007-07-19 01:49:58 -0700505 return sprintf(data, "%d\n", mci->ue_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700506}
507
508static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
509{
Douglas Thompson079708b2007-07-19 01:49:58 -0700510 return sprintf(data, "%d\n", mci->ce_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700511}
512
513static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
514{
Douglas Thompson079708b2007-07-19 01:49:58 -0700515 return sprintf(data, "%d\n", mci->ce_noinfo_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700516}
517
518static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
519{
Douglas Thompson079708b2007-07-19 01:49:58 -0700520 return sprintf(data, "%d\n", mci->ue_noinfo_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700521}
522
523static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data)
524{
Douglas Thompson079708b2007-07-19 01:49:58 -0700525 return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700526}
527
528static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
529{
Douglas Thompson079708b2007-07-19 01:49:58 -0700530 return sprintf(data, "%s\n", mci->ctl_name);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700531}
532
533static 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;
Douglas Thompson052dfb42007-07-19 01:50:13 -0700538 csrow_idx++) {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700539 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
Douglas Thompson079708b2007-07-19 01:49:58 -0700547 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700548}
549
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700550#define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
Douglas Thompson42a8e392007-07-19 01:50:10 -0700551#define to_mcidev_attr(a) container_of(a,struct mcidev_sysfs_attribute,attr)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700552
553/* MCI show/store functions for top most object */
554static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700555 char *buffer)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700556{
557 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
Douglas Thompson42a8e392007-07-19 01:50:10 -0700558 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700559
560 if (mcidev_attr->show)
561 return mcidev_attr->show(mem_ctl_info, buffer);
562
563 return -EIO;
564}
565
566static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700567 const char *buffer, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700568{
569 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
Douglas Thompson42a8e392007-07-19 01:50:10 -0700570 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700571
572 if (mcidev_attr->store)
573 return mcidev_attr->store(mem_ctl_info, buffer, count);
574
575 return -EIO;
576}
577
Doug Thompson8096cfa2007-07-19 01:50:27 -0700578/* Intermediate show/store table */
Emese Revfy52cf25d2010-01-19 02:58:23 +0100579static const struct sysfs_ops mci_ops = {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700580 .show = mcidev_show,
581 .store = mcidev_store
582};
583
584#define MCIDEV_ATTR(_name,_mode,_show,_store) \
Douglas Thompson42a8e392007-07-19 01:50:10 -0700585static struct mcidev_sysfs_attribute mci_attr_##_name = { \
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700586 .attr = {.name = __stringify(_name), .mode = _mode }, \
587 .show = _show, \
588 .store = _store, \
589};
590
591/* default Control file */
Douglas Thompson079708b2007-07-19 01:49:58 -0700592MCIDEV_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700593
594/* default Attribute files */
Douglas Thompson079708b2007-07-19 01:49:58 -0700595MCIDEV_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
596MCIDEV_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
597MCIDEV_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
598MCIDEV_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
599MCIDEV_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
600MCIDEV_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
601MCIDEV_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700602
603/* memory scrubber attribute file */
Douglas Thompson079708b2007-07-19 01:49:58 -0700604MCIDEV_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700605 mci_sdram_scrub_rate_store);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700606
Douglas Thompson42a8e392007-07-19 01:50:10 -0700607static struct mcidev_sysfs_attribute *mci_attr[] = {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700608 &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
Doug Thompson8096cfa2007-07-19 01:50:27 -0700620
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700621/*
622 * Release of a MC controlling instance
Doug Thompson8096cfa2007-07-19 01:50:27 -0700623 *
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
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700630 */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700631static void edac_mci_control_release(struct kobject *kobj)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700632{
633 struct mem_ctl_info *mci;
634
635 mci = to_mci(kobj);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700636
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);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700644}
645
646static struct kobj_type ktype_mci = {
Doug Thompson8096cfa2007-07-19 01:50:27 -0700647 .release = edac_mci_control_release,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700648 .sysfs_ops = &mci_ops,
Douglas Thompson079708b2007-07-19 01:49:58 -0700649 .default_attrs = (struct attribute **)mci_attr,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700650};
651
Doug Thompson8096cfa2007-07-19 01:50:27 -0700652/* EDAC memory controller sysfs kset:
653 * /sys/devices/system/edac/mc
654 */
Arthur Jonesf9fc82a2008-07-25 01:49:11 -0700655static struct kset *mc_kset;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700656
657/*
658 * edac_mc_register_sysfs_main_kobj
659 *
660 * setups and registers the main kobject for each mci
661 */
662int 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
Doug Thompson8096cfa2007-07-19 01:50:27 -0700674 /* 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
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400685 /* this instance become part of the mc_kset */
Arthur Jonesf9fc82a2008-07-25 01:49:11 -0700686 kobj_mci->kset = mc_kset;
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400687
Doug Thompson8096cfa2007-07-19 01:50:27 -0700688 /* register the mc<id> kobject to the mc_kset */
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400689 err = kobject_init_and_add(kobj_mci, &ktype_mci, NULL,
690 "mc%d", mci->mc_idx);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700691 if (err) {
692 debugf1("%s()Failed to register '.../edac/mc%d'\n",
693 __func__, mci->mc_idx);
694 goto kobj_reg_fail;
695 }
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400696 kobject_uevent(kobj_mci, KOBJ_ADD);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700697
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
709kobj_reg_fail:
710 module_put(mci->owner);
711
712fail_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 */
721void edac_mc_unregister_sysfs_main_kobj(struct mem_ctl_info *mci)
722{
723 /* delete the kobj from the mc_kset */
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800724 kobject_put(&mci->edac_mci_kobj);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700725}
726
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700727#define EDAC_DEVICE_SYMLINK "device"
728
729/*
Doug Thompson8096cfa2007-07-19 01:50:27 -0700730 * edac_create_mci_instance_attributes
Douglas Thompson42a8e392007-07-19 01:50:10 -0700731 * create MC driver specific attributes at the topmost level
732 * directory of this mci instance.
733 */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700734static int edac_create_mci_instance_attributes(struct mem_ctl_info *mci)
Douglas Thompson42a8e392007-07-19 01:50:10 -0700735{
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
Doug Thompson8096cfa2007-07-19 01:50:27 -0700744 while (sysfs_attrib && sysfs_attrib->attr.name) {
Douglas Thompson42a8e392007-07-19 01:50:10 -0700745 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
757/*
Doug Thompson8096cfa2007-07-19 01:50:27 -0700758 * edac_remove_mci_instance_attributes
759 * remove MC driver specific attributes at the topmost level
760 * directory of this mci instance.
761 */
762static 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
780/*
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700781 * Create a new Memory Controller kobject instance,
782 * mc<id> under the 'mc' directory
783 *
784 * Return:
785 * 0 Success
786 * !0 Failure
787 */
788int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
789{
790 int i;
791 int err;
792 struct csrow_info *csrow;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700793 struct kobject *kobj_mci = &mci->edac_mci_kobj;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700794
795 debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700796
797 /* create a symlink for the device */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700798 err = sysfs_create_link(kobj_mci, &mci->dev->kobj,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700799 EDAC_DEVICE_SYMLINK);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700800 if (err) {
801 debugf1("%s() failure to create symlink\n", __func__);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700802 goto fail0;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700803 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700804
Douglas Thompson42a8e392007-07-19 01:50:10 -0700805 /* If the low level driver desires some attributes,
806 * then create them now for the driver.
807 */
808 if (mci->mc_driver_sysfs_attributes) {
Doug Thompson8096cfa2007-07-19 01:50:27 -0700809 err = edac_create_mci_instance_attributes(mci);
810 if (err) {
811 debugf1("%s() failure to create mci attributes\n",
812 __func__);
Douglas Thompson42a8e392007-07-19 01:50:10 -0700813 goto fail0;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700814 }
Douglas Thompson42a8e392007-07-19 01:50:10 -0700815 }
816
Doug Thompson8096cfa2007-07-19 01:50:27 -0700817 /* Make directories for each CSROW object under the mc<id> kobject
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700818 */
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) {
Doug Thompson8096cfa2007-07-19 01:50:27 -0700824 err = edac_create_csrow_object(mci, csrow, i);
825 if (err) {
826 debugf1("%s() failure: create csrow %d obj\n",
827 __func__, i);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700828 goto fail1;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700829 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700830 }
831 }
832
833 return 0;
834
835 /* CSROW error: backout what has already been registered, */
Douglas Thompson052dfb42007-07-19 01:50:13 -0700836fail1:
Douglas Thompson079708b2007-07-19 01:49:58 -0700837 for (i--; i >= 0; i--) {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700838 if (csrow->nr_pages > 0) {
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800839 kobject_put(&mci->csrows[i].kobj);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700840 }
841 }
842
Doug Thompson8096cfa2007-07-19 01:50:27 -0700843 /* 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
Douglas Thompson052dfb42007-07-19 01:50:13 -0700849fail0:
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700850 return err;
851}
852
853/*
854 * remove a Memory Controller instance
855 */
856void 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) {
Doug Thompson8096cfa2007-07-19 01:50:27 -0700865 debugf0("%s() unreg csrow-%d\n", __func__, i);
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800866 kobject_put(&mci->csrows[i].kobj);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700867 }
868 }
869
Doug Thompson8096cfa2007-07-19 01:50:27 -0700870 debugf0("%s() remove_link\n", __func__);
871
872 /* remove the symlink */
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700873 sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700874
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 */
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800883 kobject_put(&mci->edac_mci_kobj);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700884}
Doug Thompson8096cfa2007-07-19 01:50:27 -0700885
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 */
901int 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 */
Arthur Jonesf9fc82a2008-07-25 01:49:11 -0700916 mc_kset = kset_create_and_add("mc", NULL, &edac_class->kset.kobj);
917 if (!mc_kset) {
918 err = -ENOMEM;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700919 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 */
929fail_out:
930 return err;
931}
932
933/*
934 * edac_sysfs_teardown_mc_kset
935 *
936 * deconstruct the mc_ket for memory controllers
937 */
938void edac_sysfs_teardown_mc_kset(void)
939{
Arthur Jonesf9fc82a2008-07-25 01:49:11 -0700940 kset_unregister(mc_kset);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700941}
942