blob: 9aac88027fb31f8a7398fa33173c396983fd7ad2 [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>
Doug Thompson8096cfa2007-07-19 01:50:27 -070013#include <linux/bug.h>
Douglas Thompson7c9281d2007-07-19 01:49:33 -070014
Douglas Thompson20bcb7a2007-07-19 01:49:47 -070015#include "edac_core.h"
Douglas Thompson7c9281d2007-07-19 01:49:33 -070016#include "edac_module.h"
17
Doug Thompson8096cfa2007-07-19 01:50:27 -070018
Douglas Thompson7c9281d2007-07-19 01:49:33 -070019/* MC EDAC Controls, setable by module parameter, and sysfs */
Dave Jiang4de78c62007-07-19 01:49:54 -070020static int edac_mc_log_ue = 1;
21static int edac_mc_log_ce = 1;
Douglas Thompsonf0440912007-07-19 01:50:19 -070022static int edac_mc_panic_on_ue;
Dave Jiang4de78c62007-07-19 01:49:54 -070023static int edac_mc_poll_msec = 1000;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070024
25/* Getter functions for above */
Dave Jiang4de78c62007-07-19 01:49:54 -070026int edac_mc_get_log_ue(void)
Douglas Thompson7c9281d2007-07-19 01:49:33 -070027{
Dave Jiang4de78c62007-07-19 01:49:54 -070028 return edac_mc_log_ue;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070029}
30
Dave Jiang4de78c62007-07-19 01:49:54 -070031int edac_mc_get_log_ce(void)
Douglas Thompson7c9281d2007-07-19 01:49:33 -070032{
Dave Jiang4de78c62007-07-19 01:49:54 -070033 return edac_mc_log_ce;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070034}
35
Dave Jiang4de78c62007-07-19 01:49:54 -070036int edac_mc_get_panic_on_ue(void)
Douglas Thompson7c9281d2007-07-19 01:49:33 -070037{
Dave Jiang4de78c62007-07-19 01:49:54 -070038 return edac_mc_panic_on_ue;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070039}
40
Dave Jiang81d87cb2007-07-19 01:49:52 -070041/* this is temporary */
42int edac_mc_get_poll_msec(void)
43{
Dave Jiang4de78c62007-07-19 01:49:54 -070044 return edac_mc_poll_msec;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070045}
46
47/* Parameter declarations for above */
Dave Jiang4de78c62007-07-19 01:49:54 -070048module_param(edac_mc_panic_on_ue, int, 0644);
49MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
50module_param(edac_mc_log_ue, int, 0644);
51MODULE_PARM_DESC(edac_mc_log_ue,
Douglas Thompson079708b2007-07-19 01:49:58 -070052 "Log uncorrectable error to console: 0=off 1=on");
Dave Jiang4de78c62007-07-19 01:49:54 -070053module_param(edac_mc_log_ce, int, 0644);
54MODULE_PARM_DESC(edac_mc_log_ce,
Douglas Thompson079708b2007-07-19 01:49:58 -070055 "Log correctable error to console: 0=off 1=on");
Dave Jiang4de78c62007-07-19 01:49:54 -070056module_param(edac_mc_poll_msec, int, 0644);
57MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
Douglas Thompson7c9281d2007-07-19 01:49:33 -070058
Douglas Thompson7c9281d2007-07-19 01:49:33 -070059/*
60 * various constants for Memory Controllers
61 */
62static const char *mem_types[] = {
63 [MEM_EMPTY] = "Empty",
64 [MEM_RESERVED] = "Reserved",
65 [MEM_UNKNOWN] = "Unknown",
66 [MEM_FPM] = "FPM",
67 [MEM_EDO] = "EDO",
68 [MEM_BEDO] = "BEDO",
69 [MEM_SDR] = "Unbuffered-SDR",
70 [MEM_RDR] = "Registered-SDR",
71 [MEM_DDR] = "Unbuffered-DDR",
72 [MEM_RDDR] = "Registered-DDR",
Dave Jiang1a9b85e2007-07-19 01:49:38 -070073 [MEM_RMBS] = "RMBS",
74 [MEM_DDR2] = "Unbuffered-DDR2",
75 [MEM_FB_DDR2] = "FullyBuffered-DDR2",
76 [MEM_RDDR2] = "Registered-DDR2"
Douglas Thompson7c9281d2007-07-19 01:49:33 -070077};
78
79static const char *dev_types[] = {
80 [DEV_UNKNOWN] = "Unknown",
81 [DEV_X1] = "x1",
82 [DEV_X2] = "x2",
83 [DEV_X4] = "x4",
84 [DEV_X8] = "x8",
85 [DEV_X16] = "x16",
86 [DEV_X32] = "x32",
87 [DEV_X64] = "x64"
88};
89
90static const char *edac_caps[] = {
91 [EDAC_UNKNOWN] = "Unknown",
92 [EDAC_NONE] = "None",
93 [EDAC_RESERVED] = "Reserved",
94 [EDAC_PARITY] = "PARITY",
95 [EDAC_EC] = "EC",
96 [EDAC_SECDED] = "SECDED",
97 [EDAC_S2ECD2ED] = "S2ECD2ED",
98 [EDAC_S4ECD4ED] = "S4ECD4ED",
99 [EDAC_S8ECD8ED] = "S8ECD8ED",
100 [EDAC_S16ECD16ED] = "S16ECD16ED"
101};
102
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700103
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700104
105/*
106 * /sys/devices/system/edac/mc;
107 * data structures and methods
108 */
109static ssize_t memctrl_int_show(void *ptr, char *buffer)
110{
Douglas Thompson079708b2007-07-19 01:49:58 -0700111 int *value = (int *)ptr;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700112 return sprintf(buffer, "%u\n", *value);
113}
114
115static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count)
116{
Douglas Thompson079708b2007-07-19 01:49:58 -0700117 int *value = (int *)ptr;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700118
119 if (isdigit(*buffer))
120 *value = simple_strtoul(buffer, NULL, 0);
121
122 return count;
123}
124
Doug Thompsonbce19682007-07-26 10:41:14 -0700125/*
126 * mc poll_msec time value
127 */
128static ssize_t poll_msec_int_store(void *ptr, const char *buffer, size_t count)
129{
130 int *value = (int *)ptr;
131
132 if (isdigit(*buffer)) {
133 *value = simple_strtoul(buffer, NULL, 0);
134
135 /* notify edac_mc engine to reset the poll period */
136 edac_mc_reset_delay_period(*value);
137 }
138
139 return count;
140}
141
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700142
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700143/* EDAC sysfs CSROW data structures and methods
144 */
145
146/* Set of more default csrow<id> attribute show/store functions */
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700147static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700148 int private)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700149{
Douglas Thompson079708b2007-07-19 01:49:58 -0700150 return sprintf(data, "%u\n", csrow->ue_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700151}
152
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700153static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700154 int private)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700155{
Douglas Thompson079708b2007-07-19 01:49:58 -0700156 return sprintf(data, "%u\n", csrow->ce_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700157}
158
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700159static ssize_t csrow_size_show(struct csrow_info *csrow, char *data,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700160 int private)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700161{
Douglas Thompson079708b2007-07-19 01:49:58 -0700162 return sprintf(data, "%u\n", PAGES_TO_MiB(csrow->nr_pages));
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700163}
164
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700165static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700166 int private)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700167{
Douglas Thompson079708b2007-07-19 01:49:58 -0700168 return sprintf(data, "%s\n", mem_types[csrow->mtype]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700169}
170
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700171static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700172 int private)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700173{
Douglas Thompson079708b2007-07-19 01:49:58 -0700174 return sprintf(data, "%s\n", dev_types[csrow->dtype]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700175}
176
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700177static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700178 int private)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700179{
Douglas Thompson079708b2007-07-19 01:49:58 -0700180 return sprintf(data, "%s\n", edac_caps[csrow->edac_mode]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700181}
182
183/* show/store functions for DIMM Label attributes */
184static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700185 char *data, int channel)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700186{
Douglas Thompson079708b2007-07-19 01:49:58 -0700187 return snprintf(data, EDAC_MC_LABEL_LEN, "%s",
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700188 csrow->channels[channel].label);
189}
190
191static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
Douglas Thompson079708b2007-07-19 01:49:58 -0700192 const char *data,
193 size_t count, int channel)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700194{
195 ssize_t max_size = 0;
196
Douglas Thompson079708b2007-07-19 01:49:58 -0700197 max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700198 strncpy(csrow->channels[channel].label, data, max_size);
199 csrow->channels[channel].label[max_size] = '\0';
200
201 return max_size;
202}
203
204/* show function for dynamic chX_ce_count attribute */
205static ssize_t channel_ce_count_show(struct csrow_info *csrow,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700206 char *data, int channel)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700207{
208 return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
209}
210
211/* csrow specific attribute structure */
212struct csrowdev_attribute {
213 struct attribute attr;
Douglas Thompson079708b2007-07-19 01:49:58 -0700214 ssize_t(*show) (struct csrow_info *, char *, int);
215 ssize_t(*store) (struct csrow_info *, const char *, size_t, int);
216 int private;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700217};
218
219#define to_csrow(k) container_of(k, struct csrow_info, kobj)
220#define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
221
222/* Set of show/store higher level functions for default csrow attributes */
223static ssize_t csrowdev_show(struct kobject *kobj,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700224 struct attribute *attr, char *buffer)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700225{
226 struct csrow_info *csrow = to_csrow(kobj);
227 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
228
229 if (csrowdev_attr->show)
230 return csrowdev_attr->show(csrow,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700231 buffer, csrowdev_attr->private);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700232 return -EIO;
233}
234
235static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700236 const char *buffer, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700237{
238 struct csrow_info *csrow = to_csrow(kobj);
Douglas Thompson079708b2007-07-19 01:49:58 -0700239 struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700240
241 if (csrowdev_attr->store)
242 return csrowdev_attr->store(csrow,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700243 buffer,
244 count, csrowdev_attr->private);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700245 return -EIO;
246}
247
248static struct sysfs_ops csrowfs_ops = {
Douglas Thompson079708b2007-07-19 01:49:58 -0700249 .show = csrowdev_show,
250 .store = csrowdev_store
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700251};
252
253#define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \
254static struct csrowdev_attribute attr_##_name = { \
255 .attr = {.name = __stringify(_name), .mode = _mode }, \
256 .show = _show, \
257 .store = _store, \
258 .private = _private, \
259};
260
261/* default cwrow<id>/attribute files */
Douglas Thompson079708b2007-07-19 01:49:58 -0700262CSROWDEV_ATTR(size_mb, S_IRUGO, csrow_size_show, NULL, 0);
263CSROWDEV_ATTR(dev_type, S_IRUGO, csrow_dev_type_show, NULL, 0);
264CSROWDEV_ATTR(mem_type, S_IRUGO, csrow_mem_type_show, NULL, 0);
265CSROWDEV_ATTR(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL, 0);
266CSROWDEV_ATTR(ue_count, S_IRUGO, csrow_ue_count_show, NULL, 0);
267CSROWDEV_ATTR(ce_count, S_IRUGO, csrow_ce_count_show, NULL, 0);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700268
269/* default attributes of the CSROW<id> object */
270static struct csrowdev_attribute *default_csrow_attr[] = {
271 &attr_dev_type,
272 &attr_mem_type,
273 &attr_edac_mode,
274 &attr_size_mb,
275 &attr_ue_count,
276 &attr_ce_count,
277 NULL,
278};
279
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700280/* possible dynamic channel DIMM Label attribute files */
Douglas Thompson079708b2007-07-19 01:49:58 -0700281CSROWDEV_ATTR(ch0_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700282 channel_dimm_label_show, channel_dimm_label_store, 0);
Douglas Thompson079708b2007-07-19 01:49:58 -0700283CSROWDEV_ATTR(ch1_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700284 channel_dimm_label_show, channel_dimm_label_store, 1);
Douglas Thompson079708b2007-07-19 01:49:58 -0700285CSROWDEV_ATTR(ch2_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700286 channel_dimm_label_show, channel_dimm_label_store, 2);
Douglas Thompson079708b2007-07-19 01:49:58 -0700287CSROWDEV_ATTR(ch3_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700288 channel_dimm_label_show, channel_dimm_label_store, 3);
Douglas Thompson079708b2007-07-19 01:49:58 -0700289CSROWDEV_ATTR(ch4_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700290 channel_dimm_label_show, channel_dimm_label_store, 4);
Douglas Thompson079708b2007-07-19 01:49:58 -0700291CSROWDEV_ATTR(ch5_dimm_label, S_IRUGO | S_IWUSR,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700292 channel_dimm_label_show, channel_dimm_label_store, 5);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700293
294/* Total possible dynamic DIMM Label attribute file table */
295static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
Douglas Thompson079708b2007-07-19 01:49:58 -0700296 &attr_ch0_dimm_label,
297 &attr_ch1_dimm_label,
298 &attr_ch2_dimm_label,
299 &attr_ch3_dimm_label,
300 &attr_ch4_dimm_label,
301 &attr_ch5_dimm_label
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700302};
303
304/* possible dynamic channel ce_count attribute files */
Douglas Thompson079708b2007-07-19 01:49:58 -0700305CSROWDEV_ATTR(ch0_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 0);
306CSROWDEV_ATTR(ch1_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 1);
307CSROWDEV_ATTR(ch2_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 2);
308CSROWDEV_ATTR(ch3_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 3);
309CSROWDEV_ATTR(ch4_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 4);
310CSROWDEV_ATTR(ch5_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 5);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700311
312/* Total possible dynamic ce_count attribute file table */
313static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
Douglas Thompson079708b2007-07-19 01:49:58 -0700314 &attr_ch0_ce_count,
315 &attr_ch1_ce_count,
316 &attr_ch2_ce_count,
317 &attr_ch3_ce_count,
318 &attr_ch4_ce_count,
319 &attr_ch5_ce_count
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700320};
321
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700322#define EDAC_NR_CHANNELS 6
323
324/* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */
325static int edac_create_channel_files(struct kobject *kobj, int chan)
326{
Douglas Thompson079708b2007-07-19 01:49:58 -0700327 int err = -ENODEV;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700328
329 if (chan >= EDAC_NR_CHANNELS)
330 return err;
331
332 /* create the DIMM label attribute file */
333 err = sysfs_create_file(kobj,
Douglas Thompson079708b2007-07-19 01:49:58 -0700334 (struct attribute *)
335 dynamic_csrow_dimm_attr[chan]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700336
337 if (!err) {
338 /* create the CE Count attribute file */
339 err = sysfs_create_file(kobj,
Douglas Thompson079708b2007-07-19 01:49:58 -0700340 (struct attribute *)
341 dynamic_csrow_ce_count_attr[chan]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700342 } else {
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700343 debugf1("%s() dimm labels and ce_count files created",
344 __func__);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700345 }
346
347 return err;
348}
349
350/* No memory to release for this kobj */
351static void edac_csrow_instance_release(struct kobject *kobj)
352{
Doug Thompson8096cfa2007-07-19 01:50:27 -0700353 struct mem_ctl_info *mci;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700354 struct csrow_info *cs;
355
Doug Thompson8096cfa2007-07-19 01:50:27 -0700356 debugf1("%s()\n", __func__);
357
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700358 cs = container_of(kobj, struct csrow_info, kobj);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700359 mci = cs->mci;
360
361 kobject_put(&mci->edac_mci_kobj);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700362}
363
364/* the kobj_type instance for a CSROW */
365static struct kobj_type ktype_csrow = {
366 .release = edac_csrow_instance_release,
367 .sysfs_ops = &csrowfs_ops,
Douglas Thompson079708b2007-07-19 01:49:58 -0700368 .default_attrs = (struct attribute **)default_csrow_attr,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700369};
370
371/* Create a CSROW object under specifed edac_mc_device */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700372static int edac_create_csrow_object(struct mem_ctl_info *mci,
373 struct csrow_info *csrow, int index)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700374{
Doug Thompson8096cfa2007-07-19 01:50:27 -0700375 struct kobject *kobj_mci = &mci->edac_mci_kobj;
376 struct kobject *kobj;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700377 int chan;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700378 int err;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700379
380 /* generate ..../edac/mc/mc<id>/csrow<index> */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700381 memset(&csrow->kobj, 0, sizeof(csrow->kobj));
382 csrow->mci = mci; /* include container up link */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700383
384 /* bump the mci instance's kobject's ref count */
385 kobj = kobject_get(&mci->edac_mci_kobj);
386 if (!kobj) {
387 err = -ENODEV;
388 goto err_out;
389 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700390
391 /* Instanstiate the csrow object */
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400392 err = kobject_init_and_add(&csrow->kobj, &ktype_csrow, kobj_mci,
393 "csrow%d", index);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700394 if (err)
395 goto err_release_top_kobj;
396
397 /* At this point, to release a csrow kobj, one must
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800398 * call the kobject_put and allow that tear down
Doug Thompson8096cfa2007-07-19 01:50:27 -0700399 * to work the releasing
400 */
401
402 /* Create the dyanmic attribute files on this csrow,
403 * namely, the DIMM labels and the channel ce_count
404 */
405 for (chan = 0; chan < csrow->nr_channels; chan++) {
406 err = edac_create_channel_files(&csrow->kobj, chan);
407 if (err) {
408 /* special case the unregister here */
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800409 kobject_put(&csrow->kobj);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700410 goto err_out;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700411 }
412 }
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400413 kobject_uevent(&csrow->kobj, KOBJ_ADD);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700414 return 0;
415
416 /* error unwind stack */
417err_release_top_kobj:
418 kobject_put(&mci->edac_mci_kobj);
419
420err_out:
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700421 return err;
422}
423
424/* default sysfs methods and data structures for the main MCI kobject */
425
426static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
Douglas Thompson079708b2007-07-19 01:49:58 -0700427 const char *data, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700428{
429 int row, chan;
430
431 mci->ue_noinfo_count = 0;
432 mci->ce_noinfo_count = 0;
433 mci->ue_count = 0;
434 mci->ce_count = 0;
435
436 for (row = 0; row < mci->nr_csrows; row++) {
437 struct csrow_info *ri = &mci->csrows[row];
438
439 ri->ue_count = 0;
440 ri->ce_count = 0;
441
442 for (chan = 0; chan < ri->nr_channels; chan++)
443 ri->channels[chan].ce_count = 0;
444 }
445
446 mci->start_time = jiffies;
447 return count;
448}
449
450/* memory scrubbing */
451static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700452 const char *data, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700453{
454 u32 bandwidth = -1;
455
456 if (mci->set_sdram_scrub_rate) {
457
458 memctrl_int_store(&bandwidth, data, count);
459
Douglas Thompson079708b2007-07-19 01:49:58 -0700460 if (!(*mci->set_sdram_scrub_rate) (mci, &bandwidth)) {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700461 edac_printk(KERN_DEBUG, EDAC_MC,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700462 "Scrub rate set successfully, applied: %d\n",
463 bandwidth);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700464 } else {
465 /* FIXME: error codes maybe? */
466 edac_printk(KERN_DEBUG, EDAC_MC,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700467 "Scrub rate set FAILED, could not apply: %d\n",
468 bandwidth);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700469 }
470 } else {
471 /* FIXME: produce "not implemented" ERROR for user-side. */
472 edac_printk(KERN_WARNING, EDAC_MC,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700473 "Memory scrubbing 'set'control is not implemented!\n");
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700474 }
475 return count;
476}
477
478static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data)
479{
480 u32 bandwidth = -1;
481
482 if (mci->get_sdram_scrub_rate) {
Douglas Thompson079708b2007-07-19 01:49:58 -0700483 if (!(*mci->get_sdram_scrub_rate) (mci, &bandwidth)) {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700484 edac_printk(KERN_DEBUG, EDAC_MC,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700485 "Scrub rate successfully, fetched: %d\n",
486 bandwidth);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700487 } else {
488 /* FIXME: error codes maybe? */
489 edac_printk(KERN_DEBUG, EDAC_MC,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700490 "Scrub rate fetch FAILED, got: %d\n",
491 bandwidth);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700492 }
493 } else {
494 /* FIXME: produce "not implemented" ERROR for user-side. */
495 edac_printk(KERN_WARNING, EDAC_MC,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700496 "Memory scrubbing 'get' control is not implemented\n");
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700497 }
498 return sprintf(data, "%d\n", bandwidth);
499}
500
501/* default attribute files for the MCI object */
502static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
503{
Douglas Thompson079708b2007-07-19 01:49:58 -0700504 return sprintf(data, "%d\n", mci->ue_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700505}
506
507static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
508{
Douglas Thompson079708b2007-07-19 01:49:58 -0700509 return sprintf(data, "%d\n", mci->ce_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700510}
511
512static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
513{
Douglas Thompson079708b2007-07-19 01:49:58 -0700514 return sprintf(data, "%d\n", mci->ce_noinfo_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700515}
516
517static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
518{
Douglas Thompson079708b2007-07-19 01:49:58 -0700519 return sprintf(data, "%d\n", mci->ue_noinfo_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700520}
521
522static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data)
523{
Douglas Thompson079708b2007-07-19 01:49:58 -0700524 return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700525}
526
527static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
528{
Douglas Thompson079708b2007-07-19 01:49:58 -0700529 return sprintf(data, "%s\n", mci->ctl_name);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700530}
531
532static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data)
533{
534 int total_pages, csrow_idx;
535
536 for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows;
Douglas Thompson052dfb42007-07-19 01:50:13 -0700537 csrow_idx++) {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700538 struct csrow_info *csrow = &mci->csrows[csrow_idx];
539
540 if (!csrow->nr_pages)
541 continue;
542
543 total_pages += csrow->nr_pages;
544 }
545
Douglas Thompson079708b2007-07-19 01:49:58 -0700546 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700547}
548
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700549#define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
Douglas Thompson42a8e392007-07-19 01:50:10 -0700550#define to_mcidev_attr(a) container_of(a,struct mcidev_sysfs_attribute,attr)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700551
552/* MCI show/store functions for top most object */
553static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700554 char *buffer)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700555{
556 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
Douglas Thompson42a8e392007-07-19 01:50:10 -0700557 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700558
559 if (mcidev_attr->show)
560 return mcidev_attr->show(mem_ctl_info, buffer);
561
562 return -EIO;
563}
564
565static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700566 const char *buffer, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700567{
568 struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
Douglas Thompson42a8e392007-07-19 01:50:10 -0700569 struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700570
571 if (mcidev_attr->store)
572 return mcidev_attr->store(mem_ctl_info, buffer, count);
573
574 return -EIO;
575}
576
Doug Thompson8096cfa2007-07-19 01:50:27 -0700577/* Intermediate show/store table */
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700578static struct sysfs_ops mci_ops = {
579 .show = mcidev_show,
580 .store = mcidev_store
581};
582
583#define MCIDEV_ATTR(_name,_mode,_show,_store) \
Douglas Thompson42a8e392007-07-19 01:50:10 -0700584static struct mcidev_sysfs_attribute mci_attr_##_name = { \
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700585 .attr = {.name = __stringify(_name), .mode = _mode }, \
586 .show = _show, \
587 .store = _store, \
588};
589
590/* default Control file */
Douglas Thompson079708b2007-07-19 01:49:58 -0700591MCIDEV_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700592
593/* default Attribute files */
Douglas Thompson079708b2007-07-19 01:49:58 -0700594MCIDEV_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
595MCIDEV_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
596MCIDEV_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
597MCIDEV_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
598MCIDEV_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
599MCIDEV_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
600MCIDEV_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700601
602/* memory scrubber attribute file */
Douglas Thompson079708b2007-07-19 01:49:58 -0700603MCIDEV_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700604 mci_sdram_scrub_rate_store);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700605
Douglas Thompson42a8e392007-07-19 01:50:10 -0700606static struct mcidev_sysfs_attribute *mci_attr[] = {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700607 &mci_attr_reset_counters,
608 &mci_attr_mc_name,
609 &mci_attr_size_mb,
610 &mci_attr_seconds_since_reset,
611 &mci_attr_ue_noinfo_count,
612 &mci_attr_ce_noinfo_count,
613 &mci_attr_ue_count,
614 &mci_attr_ce_count,
615 &mci_attr_sdram_scrub_rate,
616 NULL
617};
618
Doug Thompson8096cfa2007-07-19 01:50:27 -0700619
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700620/*
621 * Release of a MC controlling instance
Doug Thompson8096cfa2007-07-19 01:50:27 -0700622 *
623 * each MC control instance has the following resources upon entry:
624 * a) a ref count on the top memctl kobj
625 * b) a ref count on this module
626 *
627 * this function must decrement those ref counts and then
628 * issue a free on the instance's memory
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700629 */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700630static void edac_mci_control_release(struct kobject *kobj)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700631{
632 struct mem_ctl_info *mci;
633
634 mci = to_mci(kobj);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700635
636 debugf0("%s() mci instance idx=%d releasing\n", __func__, mci->mc_idx);
637
638 /* decrement the module ref count */
639 module_put(mci->owner);
640
641 /* free the mci instance memory here */
642 kfree(mci);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700643}
644
645static struct kobj_type ktype_mci = {
Doug Thompson8096cfa2007-07-19 01:50:27 -0700646 .release = edac_mci_control_release,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700647 .sysfs_ops = &mci_ops,
Douglas Thompson079708b2007-07-19 01:49:58 -0700648 .default_attrs = (struct attribute **)mci_attr,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700649};
650
Doug Thompson8096cfa2007-07-19 01:50:27 -0700651/* show/store, tables, etc for the MC kset */
652
653
654struct memctrl_dev_attribute {
655 struct attribute attr;
656 void *value;
657 ssize_t(*show) (void *, char *);
658 ssize_t(*store) (void *, const char *, size_t);
659};
660
661/* Set of show/store abstract level functions for memory control object */
662static ssize_t memctrl_dev_show(struct kobject *kobj,
663 struct attribute *attr, char *buffer)
664{
665 struct memctrl_dev_attribute *memctrl_dev;
666 memctrl_dev = (struct memctrl_dev_attribute *)attr;
667
668 if (memctrl_dev->show)
669 return memctrl_dev->show(memctrl_dev->value, buffer);
670
671 return -EIO;
672}
673
674static ssize_t memctrl_dev_store(struct kobject *kobj, struct attribute *attr,
675 const char *buffer, size_t count)
676{
677 struct memctrl_dev_attribute *memctrl_dev;
678 memctrl_dev = (struct memctrl_dev_attribute *)attr;
679
680 if (memctrl_dev->store)
681 return memctrl_dev->store(memctrl_dev->value, buffer, count);
682
683 return -EIO;
684}
685
686static struct sysfs_ops memctrlfs_ops = {
687 .show = memctrl_dev_show,
688 .store = memctrl_dev_store
689};
690
691#define MEMCTRL_ATTR(_name, _mode, _show, _store) \
692static struct memctrl_dev_attribute attr_##_name = { \
693 .attr = {.name = __stringify(_name), .mode = _mode }, \
694 .value = &_name, \
695 .show = _show, \
696 .store = _store, \
697};
698
699#define MEMCTRL_STRING_ATTR(_name, _data, _mode, _show, _store) \
700static struct memctrl_dev_attribute attr_##_name = { \
701 .attr = {.name = __stringify(_name), .mode = _mode }, \
702 .value = _data, \
703 .show = _show, \
704 .store = _store, \
705};
706
707/* csrow<id> control files */
708MEMCTRL_ATTR(edac_mc_panic_on_ue,
709 S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
710
711MEMCTRL_ATTR(edac_mc_log_ue,
712 S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
713
714MEMCTRL_ATTR(edac_mc_log_ce,
715 S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
716
717MEMCTRL_ATTR(edac_mc_poll_msec,
Doug Thompsonbce19682007-07-26 10:41:14 -0700718 S_IRUGO | S_IWUSR, memctrl_int_show, poll_msec_int_store);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700719
720/* Base Attributes of the memory ECC object */
721static struct memctrl_dev_attribute *memctrl_attr[] = {
722 &attr_edac_mc_panic_on_ue,
723 &attr_edac_mc_log_ue,
724 &attr_edac_mc_log_ce,
725 &attr_edac_mc_poll_msec,
726 NULL,
727};
728
729
730/* the ktype for the mc_kset internal kobj */
731static struct kobj_type ktype_mc_set_attribs = {
732 .sysfs_ops = &memctrlfs_ops,
733 .default_attrs = (struct attribute **)memctrl_attr,
734};
735
736/* EDAC memory controller sysfs kset:
737 * /sys/devices/system/edac/mc
738 */
739static struct kset mc_kset = {
Greg Kroah-Hartman34980ca2007-09-12 15:06:57 -0700740 .kobj = {.ktype = &ktype_mc_set_attribs },
Doug Thompson8096cfa2007-07-19 01:50:27 -0700741};
742
743
744/*
745 * edac_mc_register_sysfs_main_kobj
746 *
747 * setups and registers the main kobject for each mci
748 */
749int edac_mc_register_sysfs_main_kobj(struct mem_ctl_info *mci)
750{
751 struct kobject *kobj_mci;
752 int err;
753
754 debugf1("%s()\n", __func__);
755
756 kobj_mci = &mci->edac_mci_kobj;
757
758 /* Init the mci's kobject */
759 memset(kobj_mci, 0, sizeof(*kobj_mci));
760
Doug Thompson8096cfa2007-07-19 01:50:27 -0700761 /* Record which module 'owns' this control structure
762 * and bump the ref count of the module
763 */
764 mci->owner = THIS_MODULE;
765
766 /* bump ref count on this module */
767 if (!try_module_get(mci->owner)) {
768 err = -ENODEV;
769 goto fail_out;
770 }
771
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400772 /* this instance become part of the mc_kset */
773 kobj_mci->kset = &mc_kset;
774
Doug Thompson8096cfa2007-07-19 01:50:27 -0700775 /* register the mc<id> kobject to the mc_kset */
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400776 err = kobject_init_and_add(kobj_mci, &ktype_mci, NULL,
777 "mc%d", mci->mc_idx);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700778 if (err) {
779 debugf1("%s()Failed to register '.../edac/mc%d'\n",
780 __func__, mci->mc_idx);
781 goto kobj_reg_fail;
782 }
Greg Kroah-Hartmanb2ed2152007-12-17 15:54:39 -0400783 kobject_uevent(kobj_mci, KOBJ_ADD);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700784
785 /* At this point, to 'free' the control struct,
786 * edac_mc_unregister_sysfs_main_kobj() must be used
787 */
788
789 debugf1("%s() Registered '.../edac/mc%d' kobject\n",
790 __func__, mci->mc_idx);
791
792 return 0;
793
794 /* Error exit stack */
795
796kobj_reg_fail:
797 module_put(mci->owner);
798
799fail_out:
800 return err;
801}
802
803/*
804 * edac_mc_register_sysfs_main_kobj
805 *
806 * tears down and the main mci kobject from the mc_kset
807 */
808void edac_mc_unregister_sysfs_main_kobj(struct mem_ctl_info *mci)
809{
810 /* delete the kobj from the mc_kset */
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800811 kobject_put(&mci->edac_mci_kobj);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700812}
813
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700814#define EDAC_DEVICE_SYMLINK "device"
815
816/*
Doug Thompson8096cfa2007-07-19 01:50:27 -0700817 * edac_create_mci_instance_attributes
Douglas Thompson42a8e392007-07-19 01:50:10 -0700818 * create MC driver specific attributes at the topmost level
819 * directory of this mci instance.
820 */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700821static int edac_create_mci_instance_attributes(struct mem_ctl_info *mci)
Douglas Thompson42a8e392007-07-19 01:50:10 -0700822{
823 int err;
824 struct mcidev_sysfs_attribute *sysfs_attrib;
825
826 /* point to the start of the array and iterate over it
827 * adding each attribute listed to this mci instance's kobject
828 */
829 sysfs_attrib = mci->mc_driver_sysfs_attributes;
830
Doug Thompson8096cfa2007-07-19 01:50:27 -0700831 while (sysfs_attrib && sysfs_attrib->attr.name) {
Douglas Thompson42a8e392007-07-19 01:50:10 -0700832 err = sysfs_create_file(&mci->edac_mci_kobj,
833 (struct attribute*) sysfs_attrib);
834 if (err) {
835 return err;
836 }
837
838 sysfs_attrib++;
839 }
840
841 return 0;
842}
843
844/*
Doug Thompson8096cfa2007-07-19 01:50:27 -0700845 * edac_remove_mci_instance_attributes
846 * remove MC driver specific attributes at the topmost level
847 * directory of this mci instance.
848 */
849static void edac_remove_mci_instance_attributes(struct mem_ctl_info *mci)
850{
851 struct mcidev_sysfs_attribute *sysfs_attrib;
852
853 /* point to the start of the array and iterate over it
854 * adding each attribute listed to this mci instance's kobject
855 */
856 sysfs_attrib = mci->mc_driver_sysfs_attributes;
857
858 /* loop if there are attributes and until we hit a NULL entry */
859 while (sysfs_attrib && sysfs_attrib->attr.name) {
860 sysfs_remove_file(&mci->edac_mci_kobj,
861 (struct attribute *) sysfs_attrib);
862 sysfs_attrib++;
863 }
864}
865
866
867/*
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700868 * Create a new Memory Controller kobject instance,
869 * mc<id> under the 'mc' directory
870 *
871 * Return:
872 * 0 Success
873 * !0 Failure
874 */
875int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
876{
877 int i;
878 int err;
879 struct csrow_info *csrow;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700880 struct kobject *kobj_mci = &mci->edac_mci_kobj;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700881
882 debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700883
884 /* create a symlink for the device */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700885 err = sysfs_create_link(kobj_mci, &mci->dev->kobj,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700886 EDAC_DEVICE_SYMLINK);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700887 if (err) {
888 debugf1("%s() failure to create symlink\n", __func__);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700889 goto fail0;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700890 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700891
Douglas Thompson42a8e392007-07-19 01:50:10 -0700892 /* If the low level driver desires some attributes,
893 * then create them now for the driver.
894 */
895 if (mci->mc_driver_sysfs_attributes) {
Doug Thompson8096cfa2007-07-19 01:50:27 -0700896 err = edac_create_mci_instance_attributes(mci);
897 if (err) {
898 debugf1("%s() failure to create mci attributes\n",
899 __func__);
Douglas Thompson42a8e392007-07-19 01:50:10 -0700900 goto fail0;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700901 }
Douglas Thompson42a8e392007-07-19 01:50:10 -0700902 }
903
Doug Thompson8096cfa2007-07-19 01:50:27 -0700904 /* Make directories for each CSROW object under the mc<id> kobject
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700905 */
906 for (i = 0; i < mci->nr_csrows; i++) {
907 csrow = &mci->csrows[i];
908
909 /* Only expose populated CSROWs */
910 if (csrow->nr_pages > 0) {
Doug Thompson8096cfa2007-07-19 01:50:27 -0700911 err = edac_create_csrow_object(mci, csrow, i);
912 if (err) {
913 debugf1("%s() failure: create csrow %d obj\n",
914 __func__, i);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700915 goto fail1;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700916 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700917 }
918 }
919
920 return 0;
921
922 /* CSROW error: backout what has already been registered, */
Douglas Thompson052dfb42007-07-19 01:50:13 -0700923fail1:
Douglas Thompson079708b2007-07-19 01:49:58 -0700924 for (i--; i >= 0; i--) {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700925 if (csrow->nr_pages > 0) {
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800926 kobject_put(&mci->csrows[i].kobj);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700927 }
928 }
929
Doug Thompson8096cfa2007-07-19 01:50:27 -0700930 /* remove the mci instance's attributes, if any */
931 edac_remove_mci_instance_attributes(mci);
932
933 /* remove the symlink */
934 sysfs_remove_link(kobj_mci, EDAC_DEVICE_SYMLINK);
935
Douglas Thompson052dfb42007-07-19 01:50:13 -0700936fail0:
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700937 return err;
938}
939
940/*
941 * remove a Memory Controller instance
942 */
943void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
944{
945 int i;
946
947 debugf0("%s()\n", __func__);
948
949 /* remove all csrow kobjects */
950 for (i = 0; i < mci->nr_csrows; i++) {
951 if (mci->csrows[i].nr_pages > 0) {
Doug Thompson8096cfa2007-07-19 01:50:27 -0700952 debugf0("%s() unreg csrow-%d\n", __func__, i);
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800953 kobject_put(&mci->csrows[i].kobj);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700954 }
955 }
956
Doug Thompson8096cfa2007-07-19 01:50:27 -0700957 debugf0("%s() remove_link\n", __func__);
958
959 /* remove the symlink */
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700960 sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700961
962 debugf0("%s() remove_mci_instance\n", __func__);
963
964 /* remove this mci instance's attribtes */
965 edac_remove_mci_instance_attributes(mci);
966
967 debugf0("%s() unregister this mci kobj\n", __func__);
968
969 /* unregister this instance's kobject */
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -0800970 kobject_put(&mci->edac_mci_kobj);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700971}
Doug Thompson8096cfa2007-07-19 01:50:27 -0700972
973
974
975
976/*
977 * edac_setup_sysfs_mc_kset(void)
978 *
979 * Initialize the mc_kset for the 'mc' entry
980 * This requires creating the top 'mc' directory with a kset
981 * and its controls/attributes.
982 *
983 * To this 'mc' kset, instance 'mci' will be grouped as children.
984 *
985 * Return: 0 SUCCESS
986 * !0 FAILURE error code
987 */
988int edac_sysfs_setup_mc_kset(void)
989{
990 int err = 0;
991 struct sysdev_class *edac_class;
992
993 debugf1("%s()\n", __func__);
994
995 /* get the /sys/devices/system/edac class reference */
996 edac_class = edac_get_edac_class();
997 if (edac_class == NULL) {
998 debugf1("%s() no edac_class error=%d\n", __func__, err);
999 goto fail_out;
1000 }
1001
1002 /* Init the MC's kobject */
Greg Kroah-Hartman34980ca2007-09-12 15:06:57 -07001003 kobject_set_name(&mc_kset.kobj, "mc");
Doug Thompson8096cfa2007-07-19 01:50:27 -07001004 mc_kset.kobj.parent = &edac_class->kset.kobj;
1005
1006 /* register the mc_kset */
1007 err = kset_register(&mc_kset);
1008 if (err) {
1009 debugf1("%s() Failed to register '.../edac/mc'\n", __func__);
1010 goto fail_out;
1011 }
1012
1013 debugf1("%s() Registered '.../edac/mc' kobject\n", __func__);
1014
1015 return 0;
1016
1017
1018 /* error unwind stack */
1019fail_out:
1020 return err;
1021}
1022
1023/*
1024 * edac_sysfs_teardown_mc_kset
1025 *
1026 * deconstruct the mc_ket for memory controllers
1027 */
1028void edac_sysfs_teardown_mc_kset(void)
1029{
1030 kset_unregister(&mc_kset);
1031}
1032