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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 *
Mauro Carvalho Chehab37e59f82014-02-07 08:03:07 -020010 * (c) 2012-2013 - Mauro Carvalho Chehab
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -030011 * The entire API were re-written, and ported to use struct device
12 *
Douglas Thompson7c9281d2007-07-19 01:49:33 -070013 */
14
Douglas Thompson7c9281d2007-07-19 01:49:33 -070015#include <linux/ctype.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090016#include <linux/slab.h>
Borislav Petkov30e1f7a2010-09-02 17:26:48 +020017#include <linux/edac.h>
Doug Thompson8096cfa2007-07-19 01:50:27 -070018#include <linux/bug.h>
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -030019#include <linux/pm_runtime.h>
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -030020#include <linux/uaccess.h>
Douglas Thompson7c9281d2007-07-19 01:49:33 -070021
Douglas Thompson20bcb7a2007-07-19 01:49:47 -070022#include "edac_core.h"
Douglas Thompson7c9281d2007-07-19 01:49:33 -070023#include "edac_module.h"
24
25/* MC EDAC Controls, setable by module parameter, and sysfs */
Dave Jiang4de78c62007-07-19 01:49:54 -070026static int edac_mc_log_ue = 1;
27static int edac_mc_log_ce = 1;
Douglas Thompsonf0440912007-07-19 01:50:19 -070028static int edac_mc_panic_on_ue;
Dave Jiang4de78c62007-07-19 01:49:54 -070029static int edac_mc_poll_msec = 1000;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070030
31/* Getter functions for above */
Dave Jiang4de78c62007-07-19 01:49:54 -070032int edac_mc_get_log_ue(void)
Douglas Thompson7c9281d2007-07-19 01:49:33 -070033{
Dave Jiang4de78c62007-07-19 01:49:54 -070034 return edac_mc_log_ue;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070035}
36
Dave Jiang4de78c62007-07-19 01:49:54 -070037int edac_mc_get_log_ce(void)
Douglas Thompson7c9281d2007-07-19 01:49:33 -070038{
Dave Jiang4de78c62007-07-19 01:49:54 -070039 return edac_mc_log_ce;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070040}
41
Dave Jiang4de78c62007-07-19 01:49:54 -070042int edac_mc_get_panic_on_ue(void)
Douglas Thompson7c9281d2007-07-19 01:49:33 -070043{
Dave Jiang4de78c62007-07-19 01:49:54 -070044 return edac_mc_panic_on_ue;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070045}
46
Dave Jiang81d87cb2007-07-19 01:49:52 -070047/* this is temporary */
48int edac_mc_get_poll_msec(void)
49{
Dave Jiang4de78c62007-07-19 01:49:54 -070050 return edac_mc_poll_msec;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070051}
52
Arthur Jones096846e2008-07-25 01:49:09 -070053static int edac_set_poll_msec(const char *val, struct kernel_param *kp)
54{
Borislav Petkov9da21b12014-02-03 15:05:13 -050055 unsigned long l;
Arthur Jones096846e2008-07-25 01:49:09 -070056 int ret;
57
58 if (!val)
59 return -EINVAL;
60
Borislav Petkov9da21b12014-02-03 15:05:13 -050061 ret = kstrtoul(val, 0, &l);
Jingoo Hanc542b532013-07-19 16:07:21 +090062 if (ret)
63 return ret;
Borislav Petkov9da21b12014-02-03 15:05:13 -050064
65 if (l < 1000)
Arthur Jones096846e2008-07-25 01:49:09 -070066 return -EINVAL;
Borislav Petkov9da21b12014-02-03 15:05:13 -050067
68 *((unsigned long *)kp->arg) = l;
Arthur Jones096846e2008-07-25 01:49:09 -070069
70 /* notify edac_mc engine to reset the poll period */
71 edac_mc_reset_delay_period(l);
72
73 return 0;
74}
75
Douglas Thompson7c9281d2007-07-19 01:49:33 -070076/* Parameter declarations for above */
Dave Jiang4de78c62007-07-19 01:49:54 -070077module_param(edac_mc_panic_on_ue, int, 0644);
78MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
79module_param(edac_mc_log_ue, int, 0644);
80MODULE_PARM_DESC(edac_mc_log_ue,
Douglas Thompson079708b2007-07-19 01:49:58 -070081 "Log uncorrectable error to console: 0=off 1=on");
Dave Jiang4de78c62007-07-19 01:49:54 -070082module_param(edac_mc_log_ce, int, 0644);
83MODULE_PARM_DESC(edac_mc_log_ce,
Douglas Thompson079708b2007-07-19 01:49:58 -070084 "Log correctable error to console: 0=off 1=on");
Arthur Jones096846e2008-07-25 01:49:09 -070085module_param_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_int,
86 &edac_mc_poll_msec, 0644);
Dave Jiang4de78c62007-07-19 01:49:54 -070087MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
Douglas Thompson7c9281d2007-07-19 01:49:33 -070088
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -030089static struct device *mci_pdev;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -030090
Douglas Thompson7c9281d2007-07-19 01:49:33 -070091/*
92 * various constants for Memory Controllers
93 */
Borislav Petkov8b7719e2013-03-25 15:41:55 +010094static const char * const mem_types[] = {
Douglas Thompson7c9281d2007-07-19 01:49:33 -070095 [MEM_EMPTY] = "Empty",
96 [MEM_RESERVED] = "Reserved",
97 [MEM_UNKNOWN] = "Unknown",
98 [MEM_FPM] = "FPM",
99 [MEM_EDO] = "EDO",
100 [MEM_BEDO] = "BEDO",
101 [MEM_SDR] = "Unbuffered-SDR",
102 [MEM_RDR] = "Registered-SDR",
103 [MEM_DDR] = "Unbuffered-DDR",
104 [MEM_RDDR] = "Registered-DDR",
Dave Jiang1a9b85e2007-07-19 01:49:38 -0700105 [MEM_RMBS] = "RMBS",
106 [MEM_DDR2] = "Unbuffered-DDR2",
107 [MEM_FB_DDR2] = "FullyBuffered-DDR2",
Benjamin Herrenschmidt1d5f7262008-02-07 00:14:52 -0800108 [MEM_RDDR2] = "Registered-DDR2",
Yang Shib1cfebc2009-06-30 11:41:22 -0700109 [MEM_XDR] = "XDR",
110 [MEM_DDR3] = "Unbuffered-DDR3",
Aristeu Rozanski7b827832014-06-18 11:05:01 -0300111 [MEM_RDDR3] = "Registered-DDR3",
112 [MEM_DDR4] = "Unbuffered-DDR4",
113 [MEM_RDDR4] = "Registered-DDR4"
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700114};
115
Borislav Petkov8b7719e2013-03-25 15:41:55 +0100116static const char * const dev_types[] = {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700117 [DEV_UNKNOWN] = "Unknown",
118 [DEV_X1] = "x1",
119 [DEV_X2] = "x2",
120 [DEV_X4] = "x4",
121 [DEV_X8] = "x8",
122 [DEV_X16] = "x16",
123 [DEV_X32] = "x32",
124 [DEV_X64] = "x64"
125};
126
Borislav Petkov8b7719e2013-03-25 15:41:55 +0100127static const char * const edac_caps[] = {
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700128 [EDAC_UNKNOWN] = "Unknown",
129 [EDAC_NONE] = "None",
130 [EDAC_RESERVED] = "Reserved",
131 [EDAC_PARITY] = "PARITY",
132 [EDAC_EC] = "EC",
133 [EDAC_SECDED] = "SECDED",
134 [EDAC_S2ECD2ED] = "S2ECD2ED",
135 [EDAC_S4ECD4ED] = "S4ECD4ED",
136 [EDAC_S8ECD8ED] = "S8ECD8ED",
137 [EDAC_S16ECD16ED] = "S16ECD16ED"
138};
139
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300140#ifdef CONFIG_EDAC_LEGACY_SYSFS
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300141/*
142 * EDAC sysfs CSROW data structures and methods
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700143 */
144
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300145#define to_csrow(k) container_of(k, struct csrow_info, dev)
146
147/*
148 * We need it to avoid namespace conflicts between the legacy API
149 * and the per-dimm/per-rank one
150 */
151#define DEVICE_ATTR_LEGACY(_name, _mode, _show, _store) \
Stephen Hemmingerfbe2d362013-02-21 21:44:17 -0800152 static struct device_attribute dev_attr_legacy_##_name = __ATTR(_name, _mode, _show, _store)
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300153
154struct dev_ch_attribute {
155 struct device_attribute attr;
156 int channel;
157};
158
159#define DEVICE_CHANNEL(_name, _mode, _show, _store, _var) \
160 struct dev_ch_attribute dev_attr_legacy_##_name = \
161 { __ATTR(_name, _mode, _show, _store), (_var) }
162
163#define to_channel(k) (container_of(k, struct dev_ch_attribute, attr)->channel)
164
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700165/* Set of more default csrow<id> attribute show/store functions */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300166static ssize_t csrow_ue_count_show(struct device *dev,
167 struct device_attribute *mattr, char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700168{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300169 struct csrow_info *csrow = to_csrow(dev);
170
Douglas Thompson079708b2007-07-19 01:49:58 -0700171 return sprintf(data, "%u\n", csrow->ue_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700172}
173
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300174static ssize_t csrow_ce_count_show(struct device *dev,
175 struct device_attribute *mattr, char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700176{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300177 struct csrow_info *csrow = to_csrow(dev);
178
Douglas Thompson079708b2007-07-19 01:49:58 -0700179 return sprintf(data, "%u\n", csrow->ce_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700180}
181
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300182static ssize_t csrow_size_show(struct device *dev,
183 struct device_attribute *mattr, char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700184{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300185 struct csrow_info *csrow = to_csrow(dev);
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -0300186 int i;
187 u32 nr_pages = 0;
188
189 for (i = 0; i < csrow->nr_channels; i++)
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300190 nr_pages += csrow->channels[i]->dimm->nr_pages;
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -0300191 return sprintf(data, "%u\n", PAGES_TO_MiB(nr_pages));
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700192}
193
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300194static ssize_t csrow_mem_type_show(struct device *dev,
195 struct device_attribute *mattr, char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700196{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300197 struct csrow_info *csrow = to_csrow(dev);
198
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300199 return sprintf(data, "%s\n", mem_types[csrow->channels[0]->dimm->mtype]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700200}
201
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300202static ssize_t csrow_dev_type_show(struct device *dev,
203 struct device_attribute *mattr, char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700204{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300205 struct csrow_info *csrow = to_csrow(dev);
206
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300207 return sprintf(data, "%s\n", dev_types[csrow->channels[0]->dimm->dtype]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700208}
209
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300210static ssize_t csrow_edac_mode_show(struct device *dev,
211 struct device_attribute *mattr,
212 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700213{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300214 struct csrow_info *csrow = to_csrow(dev);
215
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300216 return sprintf(data, "%s\n", edac_caps[csrow->channels[0]->dimm->edac_mode]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700217}
218
219/* show/store functions for DIMM Label attributes */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300220static ssize_t channel_dimm_label_show(struct device *dev,
221 struct device_attribute *mattr,
222 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700223{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300224 struct csrow_info *csrow = to_csrow(dev);
225 unsigned chan = to_channel(mattr);
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300226 struct rank_info *rank = csrow->channels[chan];
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300227
Arthur Jones124682c2008-07-25 01:49:12 -0700228 /* if field has not been initialized, there is nothing to send */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300229 if (!rank->dimm->label[0])
Arthur Jones124682c2008-07-25 01:49:12 -0700230 return 0;
231
232 return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n",
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300233 rank->dimm->label);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700234}
235
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300236static ssize_t channel_dimm_label_store(struct device *dev,
237 struct device_attribute *mattr,
238 const char *data, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700239{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300240 struct csrow_info *csrow = to_csrow(dev);
241 unsigned chan = to_channel(mattr);
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300242 struct rank_info *rank = csrow->channels[chan];
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300243
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700244 ssize_t max_size = 0;
245
Douglas Thompson079708b2007-07-19 01:49:58 -0700246 max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300247 strncpy(rank->dimm->label, data, max_size);
248 rank->dimm->label[max_size] = '\0';
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700249
250 return max_size;
251}
252
253/* show function for dynamic chX_ce_count attribute */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300254static ssize_t channel_ce_count_show(struct device *dev,
255 struct device_attribute *mattr, char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700256{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300257 struct csrow_info *csrow = to_csrow(dev);
258 unsigned chan = to_channel(mattr);
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300259 struct rank_info *rank = csrow->channels[chan];
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300260
261 return sprintf(data, "%u\n", rank->ce_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700262}
263
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300264/* cwrow<id>/attribute files */
265DEVICE_ATTR_LEGACY(size_mb, S_IRUGO, csrow_size_show, NULL);
266DEVICE_ATTR_LEGACY(dev_type, S_IRUGO, csrow_dev_type_show, NULL);
267DEVICE_ATTR_LEGACY(mem_type, S_IRUGO, csrow_mem_type_show, NULL);
268DEVICE_ATTR_LEGACY(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL);
269DEVICE_ATTR_LEGACY(ue_count, S_IRUGO, csrow_ue_count_show, NULL);
270DEVICE_ATTR_LEGACY(ce_count, S_IRUGO, csrow_ce_count_show, NULL);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700271
272/* default attributes of the CSROW<id> object */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300273static struct attribute *csrow_attrs[] = {
274 &dev_attr_legacy_dev_type.attr,
275 &dev_attr_legacy_mem_type.attr,
276 &dev_attr_legacy_edac_mode.attr,
277 &dev_attr_legacy_size_mb.attr,
278 &dev_attr_legacy_ue_count.attr,
279 &dev_attr_legacy_ce_count.attr,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700280 NULL,
281};
282
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300283static struct attribute_group csrow_attr_grp = {
284 .attrs = csrow_attrs,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700285};
286
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300287static const struct attribute_group *csrow_attr_groups[] = {
288 &csrow_attr_grp,
289 NULL
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700290};
291
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300292static void csrow_attr_release(struct device *dev)
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300293{
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300294 struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);
295
Joe Perches956b9ba2012-04-29 17:08:39 -0300296 edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev));
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300297 kfree(csrow);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300298}
299
300static struct device_type csrow_attr_type = {
301 .groups = csrow_attr_groups,
302 .release = csrow_attr_release,
303};
304
305/*
306 * possible dynamic channel DIMM Label attribute files
307 *
308 */
309
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700310#define EDAC_NR_CHANNELS 6
311
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300312DEVICE_CHANNEL(ch0_dimm_label, S_IRUGO | S_IWUSR,
313 channel_dimm_label_show, channel_dimm_label_store, 0);
314DEVICE_CHANNEL(ch1_dimm_label, S_IRUGO | S_IWUSR,
315 channel_dimm_label_show, channel_dimm_label_store, 1);
316DEVICE_CHANNEL(ch2_dimm_label, S_IRUGO | S_IWUSR,
317 channel_dimm_label_show, channel_dimm_label_store, 2);
318DEVICE_CHANNEL(ch3_dimm_label, S_IRUGO | S_IWUSR,
319 channel_dimm_label_show, channel_dimm_label_store, 3);
320DEVICE_CHANNEL(ch4_dimm_label, S_IRUGO | S_IWUSR,
321 channel_dimm_label_show, channel_dimm_label_store, 4);
322DEVICE_CHANNEL(ch5_dimm_label, S_IRUGO | S_IWUSR,
323 channel_dimm_label_show, channel_dimm_label_store, 5);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700324
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300325/* Total possible dynamic DIMM Label attribute file table */
326static struct device_attribute *dynamic_csrow_dimm_attr[] = {
327 &dev_attr_legacy_ch0_dimm_label.attr,
328 &dev_attr_legacy_ch1_dimm_label.attr,
329 &dev_attr_legacy_ch2_dimm_label.attr,
330 &dev_attr_legacy_ch3_dimm_label.attr,
331 &dev_attr_legacy_ch4_dimm_label.attr,
332 &dev_attr_legacy_ch5_dimm_label.attr
333};
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700334
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300335/* possible dynamic channel ce_count attribute files */
Srivatsa S. Bhatc8c64d12013-04-30 15:17:16 +0530336DEVICE_CHANNEL(ch0_ce_count, S_IRUGO,
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300337 channel_ce_count_show, NULL, 0);
Srivatsa S. Bhatc8c64d12013-04-30 15:17:16 +0530338DEVICE_CHANNEL(ch1_ce_count, S_IRUGO,
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300339 channel_ce_count_show, NULL, 1);
Srivatsa S. Bhatc8c64d12013-04-30 15:17:16 +0530340DEVICE_CHANNEL(ch2_ce_count, S_IRUGO,
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300341 channel_ce_count_show, NULL, 2);
Srivatsa S. Bhatc8c64d12013-04-30 15:17:16 +0530342DEVICE_CHANNEL(ch3_ce_count, S_IRUGO,
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300343 channel_ce_count_show, NULL, 3);
Srivatsa S. Bhatc8c64d12013-04-30 15:17:16 +0530344DEVICE_CHANNEL(ch4_ce_count, S_IRUGO,
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300345 channel_ce_count_show, NULL, 4);
Srivatsa S. Bhatc8c64d12013-04-30 15:17:16 +0530346DEVICE_CHANNEL(ch5_ce_count, S_IRUGO,
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300347 channel_ce_count_show, NULL, 5);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700348
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300349/* Total possible dynamic ce_count attribute file table */
350static struct device_attribute *dynamic_csrow_ce_count_attr[] = {
351 &dev_attr_legacy_ch0_ce_count.attr,
352 &dev_attr_legacy_ch1_ce_count.attr,
353 &dev_attr_legacy_ch2_ce_count.attr,
354 &dev_attr_legacy_ch3_ce_count.attr,
355 &dev_attr_legacy_ch4_ce_count.attr,
356 &dev_attr_legacy_ch5_ce_count.attr
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700357};
358
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300359static inline int nr_pages_per_csrow(struct csrow_info *csrow)
360{
361 int chan, nr_pages = 0;
362
363 for (chan = 0; chan < csrow->nr_channels; chan++)
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300364 nr_pages += csrow->channels[chan]->dimm->nr_pages;
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300365
366 return nr_pages;
367}
368
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700369/* Create a CSROW object under specifed edac_mc_device */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700370static int edac_create_csrow_object(struct mem_ctl_info *mci,
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300371 struct csrow_info *csrow, int index)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700372{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300373 int err, chan;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700374
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300375 if (csrow->nr_channels >= EDAC_NR_CHANNELS)
376 return -ENODEV;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700377
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300378 csrow->dev.type = &csrow_attr_type;
Borislav Petkov88d84ac2013-07-19 12:28:25 +0200379 csrow->dev.bus = mci->bus;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300380 device_initialize(&csrow->dev);
381 csrow->dev.parent = &mci->dev;
Borislav Petkov921a6892012-09-13 18:46:39 +0200382 csrow->mci = mci;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300383 dev_set_name(&csrow->dev, "csrow%d", index);
384 dev_set_drvdata(&csrow->dev, csrow);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700385
Joe Perches956b9ba2012-04-29 17:08:39 -0300386 edac_dbg(0, "creating (virtual) csrow node %s\n",
387 dev_name(&csrow->dev));
Doug Thompson8096cfa2007-07-19 01:50:27 -0700388
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300389 err = device_add(&csrow->dev);
390 if (err < 0)
391 return err;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700392
Doug Thompson8096cfa2007-07-19 01:50:27 -0700393 for (chan = 0; chan < csrow->nr_channels; chan++) {
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300394 /* Only expose populated DIMMs */
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300395 if (!csrow->channels[chan]->dimm->nr_pages)
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300396 continue;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300397 err = device_create_file(&csrow->dev,
398 dynamic_csrow_dimm_attr[chan]);
399 if (err < 0)
400 goto error;
401 err = device_create_file(&csrow->dev,
402 dynamic_csrow_ce_count_attr[chan]);
403 if (err < 0) {
404 device_remove_file(&csrow->dev,
405 dynamic_csrow_dimm_attr[chan]);
406 goto error;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700407 }
408 }
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300409
Doug Thompson8096cfa2007-07-19 01:50:27 -0700410 return 0;
411
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300412error:
413 for (--chan; chan >= 0; chan--) {
414 device_remove_file(&csrow->dev,
415 dynamic_csrow_dimm_attr[chan]);
416 device_remove_file(&csrow->dev,
417 dynamic_csrow_ce_count_attr[chan]);
418 }
419 put_device(&csrow->dev);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700420
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700421 return err;
422}
423
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300424/* Create a CSROW object under specifed edac_mc_device */
425static int edac_create_csrow_objects(struct mem_ctl_info *mci)
426{
427 int err, i, chan;
428 struct csrow_info *csrow;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700429
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300430 for (i = 0; i < mci->nr_csrows; i++) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300431 csrow = mci->csrows[i];
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300432 if (!nr_pages_per_csrow(csrow))
433 continue;
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300434 err = edac_create_csrow_object(mci, mci->csrows[i], i);
Mauro Carvalho Chehab3d958822013-02-15 07:51:25 -0300435 if (err < 0) {
436 edac_dbg(1,
437 "failure: create csrow objects for csrow %d\n",
438 i);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300439 goto error;
Mauro Carvalho Chehab3d958822013-02-15 07:51:25 -0300440 }
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300441 }
442 return 0;
443
444error:
445 for (--i; i >= 0; i--) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300446 csrow = mci->csrows[i];
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300447 if (!nr_pages_per_csrow(csrow))
448 continue;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300449 for (chan = csrow->nr_channels - 1; chan >= 0; chan--) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300450 if (!csrow->channels[chan]->dimm->nr_pages)
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300451 continue;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300452 device_remove_file(&csrow->dev,
453 dynamic_csrow_dimm_attr[chan]);
454 device_remove_file(&csrow->dev,
455 dynamic_csrow_ce_count_attr[chan]);
456 }
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300457 put_device(&mci->csrows[i]->dev);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300458 }
459
460 return err;
461}
462
463static void edac_delete_csrow_objects(struct mem_ctl_info *mci)
464{
465 int i, chan;
466 struct csrow_info *csrow;
467
468 for (i = mci->nr_csrows - 1; i >= 0; i--) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300469 csrow = mci->csrows[i];
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300470 if (!nr_pages_per_csrow(csrow))
471 continue;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300472 for (chan = csrow->nr_channels - 1; chan >= 0; chan--) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300473 if (!csrow->channels[chan]->dimm->nr_pages)
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300474 continue;
Joe Perches956b9ba2012-04-29 17:08:39 -0300475 edac_dbg(1, "Removing csrow %d channel %d sysfs nodes\n",
476 i, chan);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300477 device_remove_file(&csrow->dev,
478 dynamic_csrow_dimm_attr[chan]);
479 device_remove_file(&csrow->dev,
480 dynamic_csrow_ce_count_attr[chan]);
481 }
Lans Zhang44d22e22012-12-24 14:01:34 +0100482 device_unregister(&mci->csrows[i]->dev);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300483 }
484}
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300485#endif
486
487/*
488 * Per-dimm (or per-rank) devices
489 */
490
491#define to_dimm(k) container_of(k, struct dimm_info, dev)
492
493/* show/store functions for DIMM Label attributes */
494static ssize_t dimmdev_location_show(struct device *dev,
495 struct device_attribute *mattr, char *data)
496{
497 struct dimm_info *dimm = to_dimm(dev);
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300498
Mauro Carvalho Chehab6e84d352012-04-30 10:24:43 -0300499 return edac_dimm_info_location(dimm, data, PAGE_SIZE);
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300500}
501
502static ssize_t dimmdev_label_show(struct device *dev,
503 struct device_attribute *mattr, char *data)
504{
505 struct dimm_info *dimm = to_dimm(dev);
506
507 /* if field has not been initialized, there is nothing to send */
508 if (!dimm->label[0])
509 return 0;
510
511 return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n", dimm->label);
512}
513
514static ssize_t dimmdev_label_store(struct device *dev,
515 struct device_attribute *mattr,
516 const char *data,
517 size_t count)
518{
519 struct dimm_info *dimm = to_dimm(dev);
520
521 ssize_t max_size = 0;
522
523 max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
524 strncpy(dimm->label, data, max_size);
525 dimm->label[max_size] = '\0';
526
527 return max_size;
528}
529
530static ssize_t dimmdev_size_show(struct device *dev,
531 struct device_attribute *mattr, char *data)
532{
533 struct dimm_info *dimm = to_dimm(dev);
534
535 return sprintf(data, "%u\n", PAGES_TO_MiB(dimm->nr_pages));
536}
537
538static ssize_t dimmdev_mem_type_show(struct device *dev,
539 struct device_attribute *mattr, char *data)
540{
541 struct dimm_info *dimm = to_dimm(dev);
542
543 return sprintf(data, "%s\n", mem_types[dimm->mtype]);
544}
545
546static ssize_t dimmdev_dev_type_show(struct device *dev,
547 struct device_attribute *mattr, char *data)
548{
549 struct dimm_info *dimm = to_dimm(dev);
550
551 return sprintf(data, "%s\n", dev_types[dimm->dtype]);
552}
553
554static ssize_t dimmdev_edac_mode_show(struct device *dev,
555 struct device_attribute *mattr,
556 char *data)
557{
558 struct dimm_info *dimm = to_dimm(dev);
559
560 return sprintf(data, "%s\n", edac_caps[dimm->edac_mode]);
561}
562
563/* dimm/rank attribute files */
564static DEVICE_ATTR(dimm_label, S_IRUGO | S_IWUSR,
565 dimmdev_label_show, dimmdev_label_store);
566static DEVICE_ATTR(dimm_location, S_IRUGO, dimmdev_location_show, NULL);
567static DEVICE_ATTR(size, S_IRUGO, dimmdev_size_show, NULL);
568static DEVICE_ATTR(dimm_mem_type, S_IRUGO, dimmdev_mem_type_show, NULL);
569static DEVICE_ATTR(dimm_dev_type, S_IRUGO, dimmdev_dev_type_show, NULL);
570static DEVICE_ATTR(dimm_edac_mode, S_IRUGO, dimmdev_edac_mode_show, NULL);
571
572/* attributes of the dimm<id>/rank<id> object */
573static struct attribute *dimm_attrs[] = {
574 &dev_attr_dimm_label.attr,
575 &dev_attr_dimm_location.attr,
576 &dev_attr_size.attr,
577 &dev_attr_dimm_mem_type.attr,
578 &dev_attr_dimm_dev_type.attr,
579 &dev_attr_dimm_edac_mode.attr,
580 NULL,
581};
582
583static struct attribute_group dimm_attr_grp = {
584 .attrs = dimm_attrs,
585};
586
587static const struct attribute_group *dimm_attr_groups[] = {
588 &dimm_attr_grp,
589 NULL
590};
591
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300592static void dimm_attr_release(struct device *dev)
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300593{
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300594 struct dimm_info *dimm = container_of(dev, struct dimm_info, dev);
595
Joe Perches956b9ba2012-04-29 17:08:39 -0300596 edac_dbg(1, "Releasing dimm device %s\n", dev_name(dev));
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300597 kfree(dimm);
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300598}
599
600static struct device_type dimm_attr_type = {
601 .groups = dimm_attr_groups,
602 .release = dimm_attr_release,
603};
604
605/* Create a DIMM object under specifed memory controller device */
606static int edac_create_dimm_object(struct mem_ctl_info *mci,
607 struct dimm_info *dimm,
608 int index)
609{
610 int err;
611 dimm->mci = mci;
612
613 dimm->dev.type = &dimm_attr_type;
Borislav Petkov88d84ac2013-07-19 12:28:25 +0200614 dimm->dev.bus = mci->bus;
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300615 device_initialize(&dimm->dev);
616
617 dimm->dev.parent = &mci->dev;
Mauro Carvalho Chehab9713fae2013-03-11 09:28:48 -0300618 if (mci->csbased)
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300619 dev_set_name(&dimm->dev, "rank%d", index);
620 else
621 dev_set_name(&dimm->dev, "dimm%d", index);
622 dev_set_drvdata(&dimm->dev, dimm);
623 pm_runtime_forbid(&mci->dev);
624
625 err = device_add(&dimm->dev);
626
Joe Perches956b9ba2012-04-29 17:08:39 -0300627 edac_dbg(0, "creating rank/dimm device %s\n", dev_name(&dimm->dev));
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300628
629 return err;
630}
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300631
632/*
633 * Memory controller device
634 */
635
636#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
637
638static ssize_t mci_reset_counters_store(struct device *dev,
639 struct device_attribute *mattr,
Douglas Thompson079708b2007-07-19 01:49:58 -0700640 const char *data, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700641{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300642 struct mem_ctl_info *mci = to_mci(dev);
643 int cnt, row, chan, i;
Mauro Carvalho Chehab5926ff52012-02-09 11:05:20 -0300644 mci->ue_mc = 0;
645 mci->ce_mc = 0;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300646 mci->ue_noinfo_count = 0;
647 mci->ce_noinfo_count = 0;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700648
649 for (row = 0; row < mci->nr_csrows; row++) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300650 struct csrow_info *ri = mci->csrows[row];
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700651
652 ri->ue_count = 0;
653 ri->ce_count = 0;
654
655 for (chan = 0; chan < ri->nr_channels; chan++)
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300656 ri->channels[chan]->ce_count = 0;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700657 }
658
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300659 cnt = 1;
660 for (i = 0; i < mci->n_layers; i++) {
661 cnt *= mci->layers[i].size;
662 memset(mci->ce_per_layer[i], 0, cnt * sizeof(u32));
663 memset(mci->ue_per_layer[i], 0, cnt * sizeof(u32));
664 }
665
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700666 mci->start_time = jiffies;
667 return count;
668}
669
Borislav Petkov39094442010-11-24 19:52:09 +0100670/* Memory scrubbing interface:
671 *
672 * A MC driver can limit the scrubbing bandwidth based on the CPU type.
673 * Therefore, ->set_sdram_scrub_rate should be made to return the actual
674 * bandwidth that is accepted or 0 when scrubbing is to be disabled.
675 *
676 * Negative value still means that an error has occurred while setting
677 * the scrub rate.
678 */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300679static ssize_t mci_sdram_scrub_rate_store(struct device *dev,
680 struct device_attribute *mattr,
Borislav Petkoveba042a2010-05-25 18:21:07 +0200681 const char *data, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700682{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300683 struct mem_ctl_info *mci = to_mci(dev);
Borislav Petkoveba042a2010-05-25 18:21:07 +0200684 unsigned long bandwidth = 0;
Borislav Petkov39094442010-11-24 19:52:09 +0100685 int new_bw = 0;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700686
Jingoo Hanc7f62fc2013-06-01 16:08:22 +0900687 if (kstrtoul(data, 10, &bandwidth) < 0)
Borislav Petkoveba042a2010-05-25 18:21:07 +0200688 return -EINVAL;
689
Borislav Petkov39094442010-11-24 19:52:09 +0100690 new_bw = mci->set_sdram_scrub_rate(mci, bandwidth);
Markus Trippelsdorf49496032011-04-20 14:28:45 -0400691 if (new_bw < 0) {
692 edac_printk(KERN_WARNING, EDAC_MC,
693 "Error setting scrub rate to: %lu\n", bandwidth);
694 return -EINVAL;
Borislav Petkoveba042a2010-05-25 18:21:07 +0200695 }
Borislav Petkov39094442010-11-24 19:52:09 +0100696
Markus Trippelsdorf49496032011-04-20 14:28:45 -0400697 return count;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700698}
699
Borislav Petkov39094442010-11-24 19:52:09 +0100700/*
701 * ->get_sdram_scrub_rate() return value semantics same as above.
702 */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300703static ssize_t mci_sdram_scrub_rate_show(struct device *dev,
704 struct device_attribute *mattr,
705 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700706{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300707 struct mem_ctl_info *mci = to_mci(dev);
Borislav Petkov39094442010-11-24 19:52:09 +0100708 int bandwidth = 0;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700709
Borislav Petkov39094442010-11-24 19:52:09 +0100710 bandwidth = mci->get_sdram_scrub_rate(mci);
711 if (bandwidth < 0) {
712 edac_printk(KERN_DEBUG, EDAC_MC, "Error reading scrub rate\n");
713 return bandwidth;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700714 }
Borislav Petkoveba042a2010-05-25 18:21:07 +0200715
Borislav Petkov39094442010-11-24 19:52:09 +0100716 return sprintf(data, "%d\n", bandwidth);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700717}
718
719/* default attribute files for the MCI object */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300720static ssize_t mci_ue_count_show(struct device *dev,
721 struct device_attribute *mattr,
722 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700723{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300724 struct mem_ctl_info *mci = to_mci(dev);
725
Mauro Carvalho Chehab5926ff52012-02-09 11:05:20 -0300726 return sprintf(data, "%d\n", mci->ue_mc);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700727}
728
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300729static ssize_t mci_ce_count_show(struct device *dev,
730 struct device_attribute *mattr,
731 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700732{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300733 struct mem_ctl_info *mci = to_mci(dev);
734
Mauro Carvalho Chehab5926ff52012-02-09 11:05:20 -0300735 return sprintf(data, "%d\n", mci->ce_mc);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700736}
737
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300738static ssize_t mci_ce_noinfo_show(struct device *dev,
739 struct device_attribute *mattr,
740 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700741{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300742 struct mem_ctl_info *mci = to_mci(dev);
743
Douglas Thompson079708b2007-07-19 01:49:58 -0700744 return sprintf(data, "%d\n", mci->ce_noinfo_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700745}
746
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300747static ssize_t mci_ue_noinfo_show(struct device *dev,
748 struct device_attribute *mattr,
749 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700750{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300751 struct mem_ctl_info *mci = to_mci(dev);
752
Douglas Thompson079708b2007-07-19 01:49:58 -0700753 return sprintf(data, "%d\n", mci->ue_noinfo_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700754}
755
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300756static ssize_t mci_seconds_show(struct device *dev,
757 struct device_attribute *mattr,
758 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700759{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300760 struct mem_ctl_info *mci = to_mci(dev);
761
Douglas Thompson079708b2007-07-19 01:49:58 -0700762 return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700763}
764
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300765static ssize_t mci_ctl_name_show(struct device *dev,
766 struct device_attribute *mattr,
767 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700768{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300769 struct mem_ctl_info *mci = to_mci(dev);
770
Douglas Thompson079708b2007-07-19 01:49:58 -0700771 return sprintf(data, "%s\n", mci->ctl_name);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700772}
773
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300774static ssize_t mci_size_mb_show(struct device *dev,
775 struct device_attribute *mattr,
776 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700777{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300778 struct mem_ctl_info *mci = to_mci(dev);
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -0300779 int total_pages = 0, csrow_idx, j;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700780
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -0300781 for (csrow_idx = 0; csrow_idx < mci->nr_csrows; csrow_idx++) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300782 struct csrow_info *csrow = mci->csrows[csrow_idx];
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700783
Mauro Carvalho Chehab1eef1282013-03-11 09:07:46 -0300784 for (j = 0; j < csrow->nr_channels; j++) {
785 struct dimm_info *dimm = csrow->channels[j]->dimm;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700786
Mauro Carvalho Chehab1eef1282013-03-11 09:07:46 -0300787 total_pages += dimm->nr_pages;
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -0300788 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700789 }
790
Douglas Thompson079708b2007-07-19 01:49:58 -0700791 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700792}
793
Mauro Carvalho Chehab8ad6c782012-03-21 17:13:24 -0300794static ssize_t mci_max_location_show(struct device *dev,
795 struct device_attribute *mattr,
796 char *data)
797{
798 struct mem_ctl_info *mci = to_mci(dev);
799 int i;
800 char *p = data;
801
802 for (i = 0; i < mci->n_layers; i++) {
803 p += sprintf(p, "%s %d ",
804 edac_layer_name[mci->layers[i].type],
805 mci->layers[i].size - 1);
806 }
807
808 return p - data;
809}
810
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300811#ifdef CONFIG_EDAC_DEBUG
812static ssize_t edac_fake_inject_write(struct file *file,
813 const char __user *data,
814 size_t count, loff_t *ppos)
815{
816 struct device *dev = file->private_data;
817 struct mem_ctl_info *mci = to_mci(dev);
818 static enum hw_event_mc_err_type type;
Mauro Carvalho Chehab38ced282012-06-12 10:55:57 -0300819 u16 errcount = mci->fake_inject_count;
820
821 if (!errcount)
822 errcount = 1;
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300823
824 type = mci->fake_inject_ue ? HW_EVENT_ERR_UNCORRECTED
825 : HW_EVENT_ERR_CORRECTED;
826
827 printk(KERN_DEBUG
Mauro Carvalho Chehab38ced282012-06-12 10:55:57 -0300828 "Generating %d %s fake error%s to %d.%d.%d to test core handling. NOTE: this won't test the driver-specific decoding logic.\n",
829 errcount,
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300830 (type == HW_EVENT_ERR_UNCORRECTED) ? "UE" : "CE",
Mauro Carvalho Chehab38ced282012-06-12 10:55:57 -0300831 errcount > 1 ? "s" : "",
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300832 mci->fake_inject_layer[0],
833 mci->fake_inject_layer[1],
834 mci->fake_inject_layer[2]
835 );
Mauro Carvalho Chehab38ced282012-06-12 10:55:57 -0300836 edac_mc_handle_error(type, mci, errcount, 0, 0, 0,
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300837 mci->fake_inject_layer[0],
838 mci->fake_inject_layer[1],
839 mci->fake_inject_layer[2],
Mauro Carvalho Chehab03f7eae2012-06-04 11:29:25 -0300840 "FAKE ERROR", "for EDAC testing only");
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300841
842 return count;
843}
844
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300845static const struct file_operations debug_fake_inject_fops = {
Wei Yongjundb7312a2012-10-17 16:32:01 +0800846 .open = simple_open,
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300847 .write = edac_fake_inject_write,
848 .llseek = generic_file_llseek,
849};
850#endif
851
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700852/* default Control file */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300853DEVICE_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700854
855/* default Attribute files */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300856DEVICE_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
857DEVICE_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
858DEVICE_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
859DEVICE_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
860DEVICE_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
861DEVICE_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
862DEVICE_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
Mauro Carvalho Chehab8ad6c782012-03-21 17:13:24 -0300863DEVICE_ATTR(max_location, S_IRUGO, mci_max_location_show, NULL);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700864
865/* memory scrubber attribute file */
Mauro Carvalho Chehabe7100472013-02-19 08:04:55 -0300866DEVICE_ATTR(sdram_scrub_rate, 0, NULL, NULL);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700867
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300868static struct attribute *mci_attrs[] = {
869 &dev_attr_reset_counters.attr,
870 &dev_attr_mc_name.attr,
871 &dev_attr_size_mb.attr,
872 &dev_attr_seconds_since_reset.attr,
873 &dev_attr_ue_noinfo_count.attr,
874 &dev_attr_ce_noinfo_count.attr,
875 &dev_attr_ue_count.attr,
876 &dev_attr_ce_count.attr,
Mauro Carvalho Chehab8ad6c782012-03-21 17:13:24 -0300877 &dev_attr_max_location.attr,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700878 NULL
879};
880
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300881static struct attribute_group mci_attr_grp = {
882 .attrs = mci_attrs,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700883};
884
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300885static const struct attribute_group *mci_attr_groups[] = {
886 &mci_attr_grp,
887 NULL
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300888};
889
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300890static void mci_attr_release(struct device *dev)
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300891{
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300892 struct mem_ctl_info *mci = container_of(dev, struct mem_ctl_info, dev);
893
Joe Perches956b9ba2012-04-29 17:08:39 -0300894 edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev));
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300895 kfree(mci);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300896}
897
898static struct device_type mci_attr_type = {
899 .groups = mci_attr_groups,
900 .release = mci_attr_release,
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300901};
902
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300903#ifdef CONFIG_EDAC_DEBUG
Rob Herringe7930ba2012-06-11 21:32:12 -0500904static struct dentry *edac_debugfs;
905
906int __init edac_debugfs_init(void)
907{
908 edac_debugfs = debugfs_create_dir("edac", NULL);
909 if (IS_ERR(edac_debugfs)) {
910 edac_debugfs = NULL;
911 return -ENOMEM;
912 }
913 return 0;
914}
915
916void __exit edac_debugfs_exit(void)
917{
918 debugfs_remove(edac_debugfs);
919}
920
Rashika Kheria95285932013-12-14 19:30:11 +0530921static int edac_create_debug_nodes(struct mem_ctl_info *mci)
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300922{
923 struct dentry *d, *parent;
924 char name[80];
925 int i;
926
Rob Herringe7930ba2012-06-11 21:32:12 -0500927 if (!edac_debugfs)
928 return -ENODEV;
929
930 d = debugfs_create_dir(mci->dev.kobj.name, edac_debugfs);
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300931 if (!d)
932 return -ENOMEM;
933 parent = d;
934
935 for (i = 0; i < mci->n_layers; i++) {
936 sprintf(name, "fake_inject_%s",
937 edac_layer_name[mci->layers[i].type]);
938 d = debugfs_create_u8(name, S_IRUGO | S_IWUSR, parent,
939 &mci->fake_inject_layer[i]);
940 if (!d)
941 goto nomem;
942 }
943
944 d = debugfs_create_bool("fake_inject_ue", S_IRUGO | S_IWUSR, parent,
945 &mci->fake_inject_ue);
946 if (!d)
947 goto nomem;
948
Mauro Carvalho Chehab38ced282012-06-12 10:55:57 -0300949 d = debugfs_create_u16("fake_inject_count", S_IRUGO | S_IWUSR, parent,
950 &mci->fake_inject_count);
951 if (!d)
952 goto nomem;
953
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300954 d = debugfs_create_file("fake_inject", S_IWUSR, parent,
955 &mci->dev,
956 &debug_fake_inject_fops);
957 if (!d)
958 goto nomem;
959
Rob Herringe7930ba2012-06-11 21:32:12 -0500960 mci->debugfs = parent;
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300961 return 0;
962nomem:
963 debugfs_remove(mci->debugfs);
964 return -ENOMEM;
965}
966#endif
967
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700968/*
969 * Create a new Memory Controller kobject instance,
970 * mc<id> under the 'mc' directory
971 *
972 * Return:
973 * 0 Success
974 * !0 Failure
975 */
976int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
977{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300978 int i, err;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700979
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300980 /*
981 * The memory controller needs its own bus, in order to avoid
982 * namespace conflicts at /sys/bus/edac.
Douglas Thompson42a8e392007-07-19 01:50:10 -0700983 */
Borislav Petkov88d84ac2013-07-19 12:28:25 +0200984 mci->bus->name = kasprintf(GFP_KERNEL, "mc%d", mci->mc_idx);
985 if (!mci->bus->name)
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300986 return -ENOMEM;
Borislav Petkov88d84ac2013-07-19 12:28:25 +0200987
988 edac_dbg(0, "creating bus %s\n", mci->bus->name);
989
990 err = bus_register(mci->bus);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300991 if (err < 0)
992 return err;
993
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300994 /* get the /sys/devices/system/edac subsys reference */
995 mci->dev.type = &mci_attr_type;
996 device_initialize(&mci->dev);
997
998 mci->dev.parent = mci_pdev;
Borislav Petkov88d84ac2013-07-19 12:28:25 +0200999 mci->dev.bus = mci->bus;
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001000 dev_set_name(&mci->dev, "mc%d", mci->mc_idx);
1001 dev_set_drvdata(&mci->dev, mci);
1002 pm_runtime_forbid(&mci->dev);
1003
Joe Perches956b9ba2012-04-29 17:08:39 -03001004 edac_dbg(0, "creating device %s\n", dev_name(&mci->dev));
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001005 err = device_add(&mci->dev);
1006 if (err < 0) {
Mauro Carvalho Chehab3d958822013-02-15 07:51:25 -03001007 edac_dbg(1, "failure: create device %s\n", dev_name(&mci->dev));
Borislav Petkov88d84ac2013-07-19 12:28:25 +02001008 bus_unregister(mci->bus);
1009 kfree(mci->bus->name);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001010 return err;
Douglas Thompson42a8e392007-07-19 01:50:10 -07001011 }
1012
Mauro Carvalho Chehabe7100472013-02-19 08:04:55 -03001013 if (mci->set_sdram_scrub_rate || mci->get_sdram_scrub_rate) {
1014 if (mci->get_sdram_scrub_rate) {
1015 dev_attr_sdram_scrub_rate.attr.mode |= S_IRUGO;
1016 dev_attr_sdram_scrub_rate.show = &mci_sdram_scrub_rate_show;
1017 }
1018 if (mci->set_sdram_scrub_rate) {
1019 dev_attr_sdram_scrub_rate.attr.mode |= S_IWUSR;
1020 dev_attr_sdram_scrub_rate.store = &mci_sdram_scrub_rate_store;
1021 }
1022 err = device_create_file(&mci->dev,
1023 &dev_attr_sdram_scrub_rate);
1024 if (err) {
1025 edac_dbg(1, "failure: create sdram_scrub_rate\n");
1026 goto fail2;
1027 }
1028 }
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001029 /*
1030 * Create the dimm/rank devices
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001031 */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001032 for (i = 0; i < mci->tot_dimms; i++) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001033 struct dimm_info *dimm = mci->dimms[i];
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001034 /* Only expose populated DIMMs */
1035 if (dimm->nr_pages == 0)
1036 continue;
1037#ifdef CONFIG_EDAC_DEBUG
Joe Perches956b9ba2012-04-29 17:08:39 -03001038 edac_dbg(1, "creating dimm%d, located at ", i);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001039 if (edac_debug_level >= 1) {
1040 int lay;
1041 for (lay = 0; lay < mci->n_layers; lay++)
1042 printk(KERN_CONT "%s %d ",
1043 edac_layer_name[mci->layers[lay].type],
1044 dimm->location[lay]);
1045 printk(KERN_CONT "\n");
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001046 }
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001047#endif
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -03001048 err = edac_create_dimm_object(mci, dimm, i);
1049 if (err) {
Joe Perches956b9ba2012-04-29 17:08:39 -03001050 edac_dbg(1, "failure: create dimm %d obj\n", i);
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -03001051 goto fail;
1052 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001053 }
1054
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -03001055#ifdef CONFIG_EDAC_LEGACY_SYSFS
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001056 err = edac_create_csrow_objects(mci);
1057 if (err < 0)
1058 goto fail;
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -03001059#endif
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001060
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -03001061#ifdef CONFIG_EDAC_DEBUG
1062 edac_create_debug_nodes(mci);
1063#endif
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001064 return 0;
1065
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001066fail:
Douglas Thompson079708b2007-07-19 01:49:58 -07001067 for (i--; i >= 0; i--) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001068 struct dimm_info *dimm = mci->dimms[i];
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001069 if (dimm->nr_pages == 0)
1070 continue;
Lans Zhang44d22e22012-12-24 14:01:34 +01001071 device_unregister(&dimm->dev);
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001072 }
Mauro Carvalho Chehabe7100472013-02-19 08:04:55 -03001073fail2:
Lans Zhang44d22e22012-12-24 14:01:34 +01001074 device_unregister(&mci->dev);
Borislav Petkov88d84ac2013-07-19 12:28:25 +02001075 bus_unregister(mci->bus);
1076 kfree(mci->bus->name);
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001077 return err;
1078}
1079
1080/*
1081 * remove a Memory Controller instance
1082 */
1083void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
1084{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001085 int i;
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001086
Joe Perches956b9ba2012-04-29 17:08:39 -03001087 edac_dbg(0, "\n");
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001088
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -03001089#ifdef CONFIG_EDAC_DEBUG
1090 debugfs_remove(mci->debugfs);
1091#endif
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -03001092#ifdef CONFIG_EDAC_LEGACY_SYSFS
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001093 edac_delete_csrow_objects(mci);
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -03001094#endif
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -03001095
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001096 for (i = 0; i < mci->tot_dimms; i++) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001097 struct dimm_info *dimm = mci->dimms[i];
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001098 if (dimm->nr_pages == 0)
1099 continue;
Joe Perches956b9ba2012-04-29 17:08:39 -03001100 edac_dbg(0, "removing device %s\n", dev_name(&dimm->dev));
Lans Zhang44d22e22012-12-24 14:01:34 +01001101 device_unregister(&dimm->dev);
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001102 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001103}
Doug Thompson8096cfa2007-07-19 01:50:27 -07001104
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001105void edac_unregister_sysfs(struct mem_ctl_info *mci)
Doug Thompson8096cfa2007-07-19 01:50:27 -07001106{
Joe Perches956b9ba2012-04-29 17:08:39 -03001107 edac_dbg(1, "Unregistering device %s\n", dev_name(&mci->dev));
Lans Zhang44d22e22012-12-24 14:01:34 +01001108 device_unregister(&mci->dev);
Borislav Petkov88d84ac2013-07-19 12:28:25 +02001109 bus_unregister(mci->bus);
1110 kfree(mci->bus->name);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001111}
Doug Thompson8096cfa2007-07-19 01:50:27 -07001112
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001113static void mc_attr_release(struct device *dev)
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001114{
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001115 /*
1116 * There's no container structure here, as this is just the mci
1117 * parent device, used to create the /sys/devices/mc sysfs node.
1118 * So, there are no attributes on it.
1119 */
Joe Perches956b9ba2012-04-29 17:08:39 -03001120 edac_dbg(1, "Releasing device %s\n", dev_name(dev));
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001121 kfree(dev);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001122}
1123
1124static struct device_type mc_attr_type = {
1125 .release = mc_attr_release,
1126};
1127/*
1128 * Init/exit code for the module. Basically, creates/removes /sys/class/rc
1129 */
1130int __init edac_mc_sysfs_init(void)
1131{
1132 struct bus_type *edac_subsys;
1133 int err;
Doug Thompson8096cfa2007-07-19 01:50:27 -07001134
Kay Sieversfe5ff8b2011-12-14 15:21:07 -08001135 /* get the /sys/devices/system/edac subsys reference */
1136 edac_subsys = edac_get_sysfs_subsys();
1137 if (edac_subsys == NULL) {
Joe Perches956b9ba2012-04-29 17:08:39 -03001138 edac_dbg(1, "no edac_subsys\n");
Denis Kirjanov2d56b102012-10-25 19:42:58 +04001139 err = -EINVAL;
1140 goto out;
Doug Thompson8096cfa2007-07-19 01:50:27 -07001141 }
1142
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001143 mci_pdev = kzalloc(sizeof(*mci_pdev), GFP_KERNEL);
Denis Kirjanov2d56b102012-10-25 19:42:58 +04001144 if (!mci_pdev) {
1145 err = -ENOMEM;
1146 goto out_put_sysfs;
1147 }
Doug Thompson8096cfa2007-07-19 01:50:27 -07001148
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001149 mci_pdev->bus = edac_subsys;
1150 mci_pdev->type = &mc_attr_type;
1151 device_initialize(mci_pdev);
1152 dev_set_name(mci_pdev, "mc");
1153
1154 err = device_add(mci_pdev);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001155 if (err < 0)
Denis Kirjanov2d56b102012-10-25 19:42:58 +04001156 goto out_dev_free;
Doug Thompson8096cfa2007-07-19 01:50:27 -07001157
Joe Perches956b9ba2012-04-29 17:08:39 -03001158 edac_dbg(0, "device %s created\n", dev_name(mci_pdev));
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001159
Doug Thompson8096cfa2007-07-19 01:50:27 -07001160 return 0;
Denis Kirjanov2d56b102012-10-25 19:42:58 +04001161
1162 out_dev_free:
1163 kfree(mci_pdev);
1164 out_put_sysfs:
1165 edac_put_sysfs_subsys();
1166 out:
1167 return err;
Doug Thompson8096cfa2007-07-19 01:50:27 -07001168}
1169
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001170void __exit edac_mc_sysfs_exit(void)
Doug Thompson8096cfa2007-07-19 01:50:27 -07001171{
Lans Zhang44d22e22012-12-24 14:01:34 +01001172 device_unregister(mci_pdev);
Kay Sieversfe5ff8b2011-12-14 15:21:07 -08001173 edac_put_sysfs_subsys();
Doug Thompson8096cfa2007-07-19 01:50:27 -07001174}