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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) \
Borislav Petkovf11135d2015-01-30 14:49:04 +0100160 static struct dev_ch_attribute dev_attr_legacy_##_name = \
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300161 { __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
Toshi Kani1ea62c52015-09-22 08:58:02 -0600232 return snprintf(data, sizeof(rank->dimm->label) + 1, "%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];
Toshi Kani438470b2015-09-24 13:06:04 -0600243 size_t copy_count = count;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300244
Toshi Kani438470b2015-09-24 13:06:04 -0600245 if (count == 0)
246 return -EINVAL;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700247
Toshi Kani438470b2015-09-24 13:06:04 -0600248 if (data[count - 1] == '\0' || data[count - 1] == '\n')
249 copy_count -= 1;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700250
Toshi Kanid0c9c932015-09-24 13:59:27 -0600251 if (copy_count == 0 || copy_count >= sizeof(rank->dimm->label))
Toshi Kani438470b2015-09-24 13:06:04 -0600252 return -EINVAL;
253
254 strncpy(rank->dimm->label, data, copy_count);
255 rank->dimm->label[copy_count] = '\0';
256
257 return count;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700258}
259
260/* show function for dynamic chX_ce_count attribute */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300261static ssize_t channel_ce_count_show(struct device *dev,
262 struct device_attribute *mattr, char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700263{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300264 struct csrow_info *csrow = to_csrow(dev);
265 unsigned chan = to_channel(mattr);
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300266 struct rank_info *rank = csrow->channels[chan];
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300267
268 return sprintf(data, "%u\n", rank->ce_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700269}
270
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300271/* cwrow<id>/attribute files */
272DEVICE_ATTR_LEGACY(size_mb, S_IRUGO, csrow_size_show, NULL);
273DEVICE_ATTR_LEGACY(dev_type, S_IRUGO, csrow_dev_type_show, NULL);
274DEVICE_ATTR_LEGACY(mem_type, S_IRUGO, csrow_mem_type_show, NULL);
275DEVICE_ATTR_LEGACY(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL);
276DEVICE_ATTR_LEGACY(ue_count, S_IRUGO, csrow_ue_count_show, NULL);
277DEVICE_ATTR_LEGACY(ce_count, S_IRUGO, csrow_ce_count_show, NULL);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700278
279/* default attributes of the CSROW<id> object */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300280static struct attribute *csrow_attrs[] = {
281 &dev_attr_legacy_dev_type.attr,
282 &dev_attr_legacy_mem_type.attr,
283 &dev_attr_legacy_edac_mode.attr,
284 &dev_attr_legacy_size_mb.attr,
285 &dev_attr_legacy_ue_count.attr,
286 &dev_attr_legacy_ce_count.attr,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700287 NULL,
288};
289
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300290static struct attribute_group csrow_attr_grp = {
291 .attrs = csrow_attrs,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700292};
293
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300294static const struct attribute_group *csrow_attr_groups[] = {
295 &csrow_attr_grp,
296 NULL
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700297};
298
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300299static void csrow_attr_release(struct device *dev)
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300300{
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300301 struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);
302
Joe Perches956b9ba2012-04-29 17:08:39 -0300303 edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev));
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300304 kfree(csrow);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300305}
306
307static struct device_type csrow_attr_type = {
308 .groups = csrow_attr_groups,
309 .release = csrow_attr_release,
310};
311
312/*
313 * possible dynamic channel DIMM Label attribute files
314 *
315 */
316
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300317DEVICE_CHANNEL(ch0_dimm_label, S_IRUGO | S_IWUSR,
318 channel_dimm_label_show, channel_dimm_label_store, 0);
319DEVICE_CHANNEL(ch1_dimm_label, S_IRUGO | S_IWUSR,
320 channel_dimm_label_show, channel_dimm_label_store, 1);
321DEVICE_CHANNEL(ch2_dimm_label, S_IRUGO | S_IWUSR,
322 channel_dimm_label_show, channel_dimm_label_store, 2);
323DEVICE_CHANNEL(ch3_dimm_label, S_IRUGO | S_IWUSR,
324 channel_dimm_label_show, channel_dimm_label_store, 3);
325DEVICE_CHANNEL(ch4_dimm_label, S_IRUGO | S_IWUSR,
326 channel_dimm_label_show, channel_dimm_label_store, 4);
327DEVICE_CHANNEL(ch5_dimm_label, S_IRUGO | S_IWUSR,
328 channel_dimm_label_show, channel_dimm_label_store, 5);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700329
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300330/* Total possible dynamic DIMM Label attribute file table */
Takashi Iwai2c1946b2015-02-04 11:48:51 +0100331static struct attribute *dynamic_csrow_dimm_attr[] = {
332 &dev_attr_legacy_ch0_dimm_label.attr.attr,
333 &dev_attr_legacy_ch1_dimm_label.attr.attr,
334 &dev_attr_legacy_ch2_dimm_label.attr.attr,
335 &dev_attr_legacy_ch3_dimm_label.attr.attr,
336 &dev_attr_legacy_ch4_dimm_label.attr.attr,
337 &dev_attr_legacy_ch5_dimm_label.attr.attr,
338 NULL
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300339};
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700340
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300341/* possible dynamic channel ce_count attribute files */
Srivatsa S. Bhatc8c64d12013-04-30 15:17:16 +0530342DEVICE_CHANNEL(ch0_ce_count, S_IRUGO,
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300343 channel_ce_count_show, NULL, 0);
Srivatsa S. Bhatc8c64d12013-04-30 15:17:16 +0530344DEVICE_CHANNEL(ch1_ce_count, S_IRUGO,
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300345 channel_ce_count_show, NULL, 1);
Srivatsa S. Bhatc8c64d12013-04-30 15:17:16 +0530346DEVICE_CHANNEL(ch2_ce_count, S_IRUGO,
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300347 channel_ce_count_show, NULL, 2);
Srivatsa S. Bhatc8c64d12013-04-30 15:17:16 +0530348DEVICE_CHANNEL(ch3_ce_count, S_IRUGO,
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300349 channel_ce_count_show, NULL, 3);
Srivatsa S. Bhatc8c64d12013-04-30 15:17:16 +0530350DEVICE_CHANNEL(ch4_ce_count, S_IRUGO,
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300351 channel_ce_count_show, NULL, 4);
Srivatsa S. Bhatc8c64d12013-04-30 15:17:16 +0530352DEVICE_CHANNEL(ch5_ce_count, S_IRUGO,
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300353 channel_ce_count_show, NULL, 5);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700354
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300355/* Total possible dynamic ce_count attribute file table */
Takashi Iwai2c1946b2015-02-04 11:48:51 +0100356static struct attribute *dynamic_csrow_ce_count_attr[] = {
357 &dev_attr_legacy_ch0_ce_count.attr.attr,
358 &dev_attr_legacy_ch1_ce_count.attr.attr,
359 &dev_attr_legacy_ch2_ce_count.attr.attr,
360 &dev_attr_legacy_ch3_ce_count.attr.attr,
361 &dev_attr_legacy_ch4_ce_count.attr.attr,
362 &dev_attr_legacy_ch5_ce_count.attr.attr,
363 NULL
364};
365
366static umode_t csrow_dev_is_visible(struct kobject *kobj,
367 struct attribute *attr, int idx)
368{
369 struct device *dev = kobj_to_dev(kobj);
370 struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);
371
372 if (idx >= csrow->nr_channels)
373 return 0;
374 /* Only expose populated DIMMs */
375 if (!csrow->channels[idx]->dimm->nr_pages)
376 return 0;
377 return attr->mode;
378}
379
380
381static const struct attribute_group csrow_dev_dimm_group = {
382 .attrs = dynamic_csrow_dimm_attr,
383 .is_visible = csrow_dev_is_visible,
384};
385
386static const struct attribute_group csrow_dev_ce_count_group = {
387 .attrs = dynamic_csrow_ce_count_attr,
388 .is_visible = csrow_dev_is_visible,
389};
390
391static const struct attribute_group *csrow_dev_groups[] = {
392 &csrow_dev_dimm_group,
393 &csrow_dev_ce_count_group,
394 NULL
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700395};
396
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300397static inline int nr_pages_per_csrow(struct csrow_info *csrow)
398{
399 int chan, nr_pages = 0;
400
401 for (chan = 0; chan < csrow->nr_channels; chan++)
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300402 nr_pages += csrow->channels[chan]->dimm->nr_pages;
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300403
404 return nr_pages;
405}
406
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700407/* Create a CSROW object under specifed edac_mc_device */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700408static int edac_create_csrow_object(struct mem_ctl_info *mci,
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300409 struct csrow_info *csrow, int index)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700410{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300411 csrow->dev.type = &csrow_attr_type;
Borislav Petkov88d84ac2013-07-19 12:28:25 +0200412 csrow->dev.bus = mci->bus;
Takashi Iwai2c1946b2015-02-04 11:48:51 +0100413 csrow->dev.groups = csrow_dev_groups;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300414 device_initialize(&csrow->dev);
415 csrow->dev.parent = &mci->dev;
Borislav Petkov921a6892012-09-13 18:46:39 +0200416 csrow->mci = mci;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300417 dev_set_name(&csrow->dev, "csrow%d", index);
418 dev_set_drvdata(&csrow->dev, csrow);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700419
Joe Perches956b9ba2012-04-29 17:08:39 -0300420 edac_dbg(0, "creating (virtual) csrow node %s\n",
421 dev_name(&csrow->dev));
Doug Thompson8096cfa2007-07-19 01:50:27 -0700422
Takashi Iwai2c1946b2015-02-04 11:48:51 +0100423 return device_add(&csrow->dev);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700424}
425
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300426/* Create a CSROW object under specifed edac_mc_device */
427static int edac_create_csrow_objects(struct mem_ctl_info *mci)
428{
Takashi Iwai2c1946b2015-02-04 11:48:51 +0100429 int err, i;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300430 struct csrow_info *csrow;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700431
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300432 for (i = 0; i < mci->nr_csrows; i++) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300433 csrow = mci->csrows[i];
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300434 if (!nr_pages_per_csrow(csrow))
435 continue;
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300436 err = edac_create_csrow_object(mci, mci->csrows[i], i);
Mauro Carvalho Chehab3d958822013-02-15 07:51:25 -0300437 if (err < 0) {
438 edac_dbg(1,
439 "failure: create csrow objects for csrow %d\n",
440 i);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300441 goto error;
Mauro Carvalho Chehab3d958822013-02-15 07:51:25 -0300442 }
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300443 }
444 return 0;
445
446error:
447 for (--i; i >= 0; i--) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300448 csrow = mci->csrows[i];
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300449 if (!nr_pages_per_csrow(csrow))
450 continue;
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300451 put_device(&mci->csrows[i]->dev);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300452 }
453
454 return err;
455}
456
457static void edac_delete_csrow_objects(struct mem_ctl_info *mci)
458{
Takashi Iwai2c1946b2015-02-04 11:48:51 +0100459 int i;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300460 struct csrow_info *csrow;
461
462 for (i = mci->nr_csrows - 1; i >= 0; i--) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300463 csrow = mci->csrows[i];
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300464 if (!nr_pages_per_csrow(csrow))
465 continue;
Lans Zhang44d22e22012-12-24 14:01:34 +0100466 device_unregister(&mci->csrows[i]->dev);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300467 }
468}
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300469#endif
470
471/*
472 * Per-dimm (or per-rank) devices
473 */
474
475#define to_dimm(k) container_of(k, struct dimm_info, dev)
476
477/* show/store functions for DIMM Label attributes */
478static ssize_t dimmdev_location_show(struct device *dev,
479 struct device_attribute *mattr, char *data)
480{
481 struct dimm_info *dimm = to_dimm(dev);
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300482
Mauro Carvalho Chehab6e84d352012-04-30 10:24:43 -0300483 return edac_dimm_info_location(dimm, data, PAGE_SIZE);
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300484}
485
486static ssize_t dimmdev_label_show(struct device *dev,
487 struct device_attribute *mattr, char *data)
488{
489 struct dimm_info *dimm = to_dimm(dev);
490
491 /* if field has not been initialized, there is nothing to send */
492 if (!dimm->label[0])
493 return 0;
494
Toshi Kani1ea62c52015-09-22 08:58:02 -0600495 return snprintf(data, sizeof(dimm->label) + 1, "%s\n", dimm->label);
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300496}
497
498static ssize_t dimmdev_label_store(struct device *dev,
499 struct device_attribute *mattr,
500 const char *data,
501 size_t count)
502{
503 struct dimm_info *dimm = to_dimm(dev);
Toshi Kani438470b2015-09-24 13:06:04 -0600504 size_t copy_count = count;
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300505
Toshi Kani438470b2015-09-24 13:06:04 -0600506 if (count == 0)
507 return -EINVAL;
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300508
Toshi Kani438470b2015-09-24 13:06:04 -0600509 if (data[count - 1] == '\0' || data[count - 1] == '\n')
510 copy_count -= 1;
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300511
Toshi Kanid0c9c932015-09-24 13:59:27 -0600512 if (copy_count == 0 || copy_count >= sizeof(dimm->label))
Toshi Kani438470b2015-09-24 13:06:04 -0600513 return -EINVAL;
514
515 strncpy(dimm->label, data, copy_count);
516 dimm->label[copy_count] = '\0';
517
518 return count;
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300519}
520
521static ssize_t dimmdev_size_show(struct device *dev,
522 struct device_attribute *mattr, char *data)
523{
524 struct dimm_info *dimm = to_dimm(dev);
525
526 return sprintf(data, "%u\n", PAGES_TO_MiB(dimm->nr_pages));
527}
528
529static ssize_t dimmdev_mem_type_show(struct device *dev,
530 struct device_attribute *mattr, char *data)
531{
532 struct dimm_info *dimm = to_dimm(dev);
533
534 return sprintf(data, "%s\n", mem_types[dimm->mtype]);
535}
536
537static ssize_t dimmdev_dev_type_show(struct device *dev,
538 struct device_attribute *mattr, char *data)
539{
540 struct dimm_info *dimm = to_dimm(dev);
541
542 return sprintf(data, "%s\n", dev_types[dimm->dtype]);
543}
544
545static ssize_t dimmdev_edac_mode_show(struct device *dev,
546 struct device_attribute *mattr,
547 char *data)
548{
549 struct dimm_info *dimm = to_dimm(dev);
550
551 return sprintf(data, "%s\n", edac_caps[dimm->edac_mode]);
552}
553
554/* dimm/rank attribute files */
555static DEVICE_ATTR(dimm_label, S_IRUGO | S_IWUSR,
556 dimmdev_label_show, dimmdev_label_store);
557static DEVICE_ATTR(dimm_location, S_IRUGO, dimmdev_location_show, NULL);
558static DEVICE_ATTR(size, S_IRUGO, dimmdev_size_show, NULL);
559static DEVICE_ATTR(dimm_mem_type, S_IRUGO, dimmdev_mem_type_show, NULL);
560static DEVICE_ATTR(dimm_dev_type, S_IRUGO, dimmdev_dev_type_show, NULL);
561static DEVICE_ATTR(dimm_edac_mode, S_IRUGO, dimmdev_edac_mode_show, NULL);
562
563/* attributes of the dimm<id>/rank<id> object */
564static struct attribute *dimm_attrs[] = {
565 &dev_attr_dimm_label.attr,
566 &dev_attr_dimm_location.attr,
567 &dev_attr_size.attr,
568 &dev_attr_dimm_mem_type.attr,
569 &dev_attr_dimm_dev_type.attr,
570 &dev_attr_dimm_edac_mode.attr,
571 NULL,
572};
573
574static struct attribute_group dimm_attr_grp = {
575 .attrs = dimm_attrs,
576};
577
578static const struct attribute_group *dimm_attr_groups[] = {
579 &dimm_attr_grp,
580 NULL
581};
582
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300583static void dimm_attr_release(struct device *dev)
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300584{
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300585 struct dimm_info *dimm = container_of(dev, struct dimm_info, dev);
586
Joe Perches956b9ba2012-04-29 17:08:39 -0300587 edac_dbg(1, "Releasing dimm device %s\n", dev_name(dev));
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300588 kfree(dimm);
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300589}
590
591static struct device_type dimm_attr_type = {
592 .groups = dimm_attr_groups,
593 .release = dimm_attr_release,
594};
595
596/* Create a DIMM object under specifed memory controller device */
597static int edac_create_dimm_object(struct mem_ctl_info *mci,
598 struct dimm_info *dimm,
599 int index)
600{
601 int err;
602 dimm->mci = mci;
603
604 dimm->dev.type = &dimm_attr_type;
Borislav Petkov88d84ac2013-07-19 12:28:25 +0200605 dimm->dev.bus = mci->bus;
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300606 device_initialize(&dimm->dev);
607
608 dimm->dev.parent = &mci->dev;
Mauro Carvalho Chehab9713fae2013-03-11 09:28:48 -0300609 if (mci->csbased)
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300610 dev_set_name(&dimm->dev, "rank%d", index);
611 else
612 dev_set_name(&dimm->dev, "dimm%d", index);
613 dev_set_drvdata(&dimm->dev, dimm);
614 pm_runtime_forbid(&mci->dev);
615
616 err = device_add(&dimm->dev);
617
Joe Perches956b9ba2012-04-29 17:08:39 -0300618 edac_dbg(0, "creating rank/dimm device %s\n", dev_name(&dimm->dev));
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300619
620 return err;
621}
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300622
623/*
624 * Memory controller device
625 */
626
627#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
628
629static ssize_t mci_reset_counters_store(struct device *dev,
630 struct device_attribute *mattr,
Douglas Thompson079708b2007-07-19 01:49:58 -0700631 const char *data, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700632{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300633 struct mem_ctl_info *mci = to_mci(dev);
634 int cnt, row, chan, i;
Mauro Carvalho Chehab5926ff52012-02-09 11:05:20 -0300635 mci->ue_mc = 0;
636 mci->ce_mc = 0;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300637 mci->ue_noinfo_count = 0;
638 mci->ce_noinfo_count = 0;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700639
640 for (row = 0; row < mci->nr_csrows; row++) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300641 struct csrow_info *ri = mci->csrows[row];
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700642
643 ri->ue_count = 0;
644 ri->ce_count = 0;
645
646 for (chan = 0; chan < ri->nr_channels; chan++)
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300647 ri->channels[chan]->ce_count = 0;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700648 }
649
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300650 cnt = 1;
651 for (i = 0; i < mci->n_layers; i++) {
652 cnt *= mci->layers[i].size;
653 memset(mci->ce_per_layer[i], 0, cnt * sizeof(u32));
654 memset(mci->ue_per_layer[i], 0, cnt * sizeof(u32));
655 }
656
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700657 mci->start_time = jiffies;
658 return count;
659}
660
Borislav Petkov39094442010-11-24 19:52:09 +0100661/* Memory scrubbing interface:
662 *
663 * A MC driver can limit the scrubbing bandwidth based on the CPU type.
664 * Therefore, ->set_sdram_scrub_rate should be made to return the actual
665 * bandwidth that is accepted or 0 when scrubbing is to be disabled.
666 *
667 * Negative value still means that an error has occurred while setting
668 * the scrub rate.
669 */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300670static ssize_t mci_sdram_scrub_rate_store(struct device *dev,
671 struct device_attribute *mattr,
Borislav Petkoveba042a2010-05-25 18:21:07 +0200672 const char *data, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700673{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300674 struct mem_ctl_info *mci = to_mci(dev);
Borislav Petkoveba042a2010-05-25 18:21:07 +0200675 unsigned long bandwidth = 0;
Borislav Petkov39094442010-11-24 19:52:09 +0100676 int new_bw = 0;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700677
Jingoo Hanc7f62fc2013-06-01 16:08:22 +0900678 if (kstrtoul(data, 10, &bandwidth) < 0)
Borislav Petkoveba042a2010-05-25 18:21:07 +0200679 return -EINVAL;
680
Borislav Petkov39094442010-11-24 19:52:09 +0100681 new_bw = mci->set_sdram_scrub_rate(mci, bandwidth);
Markus Trippelsdorf49496032011-04-20 14:28:45 -0400682 if (new_bw < 0) {
683 edac_printk(KERN_WARNING, EDAC_MC,
684 "Error setting scrub rate to: %lu\n", bandwidth);
685 return -EINVAL;
Borislav Petkoveba042a2010-05-25 18:21:07 +0200686 }
Borislav Petkov39094442010-11-24 19:52:09 +0100687
Markus Trippelsdorf49496032011-04-20 14:28:45 -0400688 return count;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700689}
690
Borislav Petkov39094442010-11-24 19:52:09 +0100691/*
692 * ->get_sdram_scrub_rate() return value semantics same as above.
693 */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300694static ssize_t mci_sdram_scrub_rate_show(struct device *dev,
695 struct device_attribute *mattr,
696 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700697{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300698 struct mem_ctl_info *mci = to_mci(dev);
Borislav Petkov39094442010-11-24 19:52:09 +0100699 int bandwidth = 0;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700700
Borislav Petkov39094442010-11-24 19:52:09 +0100701 bandwidth = mci->get_sdram_scrub_rate(mci);
702 if (bandwidth < 0) {
703 edac_printk(KERN_DEBUG, EDAC_MC, "Error reading scrub rate\n");
704 return bandwidth;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700705 }
Borislav Petkoveba042a2010-05-25 18:21:07 +0200706
Borislav Petkov39094442010-11-24 19:52:09 +0100707 return sprintf(data, "%d\n", bandwidth);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700708}
709
710/* default attribute files for the MCI object */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300711static ssize_t mci_ue_count_show(struct device *dev,
712 struct device_attribute *mattr,
713 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700714{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300715 struct mem_ctl_info *mci = to_mci(dev);
716
Mauro Carvalho Chehab5926ff52012-02-09 11:05:20 -0300717 return sprintf(data, "%d\n", mci->ue_mc);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700718}
719
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300720static ssize_t mci_ce_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->ce_mc);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700727}
728
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300729static ssize_t mci_ce_noinfo_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
Douglas Thompson079708b2007-07-19 01:49:58 -0700735 return sprintf(data, "%d\n", mci->ce_noinfo_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700736}
737
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300738static ssize_t mci_ue_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->ue_noinfo_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700745}
746
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300747static ssize_t mci_seconds_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, "%ld\n", (jiffies - mci->start_time) / HZ);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700754}
755
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300756static ssize_t mci_ctl_name_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, "%s\n", mci->ctl_name);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700763}
764
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300765static ssize_t mci_size_mb_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);
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -0300770 int total_pages = 0, csrow_idx, j;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700771
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -0300772 for (csrow_idx = 0; csrow_idx < mci->nr_csrows; csrow_idx++) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300773 struct csrow_info *csrow = mci->csrows[csrow_idx];
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700774
Mauro Carvalho Chehab1eef1282013-03-11 09:07:46 -0300775 for (j = 0; j < csrow->nr_channels; j++) {
776 struct dimm_info *dimm = csrow->channels[j]->dimm;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700777
Mauro Carvalho Chehab1eef1282013-03-11 09:07:46 -0300778 total_pages += dimm->nr_pages;
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -0300779 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700780 }
781
Douglas Thompson079708b2007-07-19 01:49:58 -0700782 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700783}
784
Mauro Carvalho Chehab8ad6c782012-03-21 17:13:24 -0300785static ssize_t mci_max_location_show(struct device *dev,
786 struct device_attribute *mattr,
787 char *data)
788{
789 struct mem_ctl_info *mci = to_mci(dev);
790 int i;
791 char *p = data;
792
793 for (i = 0; i < mci->n_layers; i++) {
794 p += sprintf(p, "%s %d ",
795 edac_layer_name[mci->layers[i].type],
796 mci->layers[i].size - 1);
797 }
798
799 return p - data;
800}
801
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700802/* default Control file */
Borislav Petkovf11135d2015-01-30 14:49:04 +0100803static DEVICE_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700804
805/* default Attribute files */
Borislav Petkovf11135d2015-01-30 14:49:04 +0100806static DEVICE_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
807static DEVICE_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
808static DEVICE_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
809static DEVICE_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
810static DEVICE_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
811static DEVICE_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
812static DEVICE_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
813static DEVICE_ATTR(max_location, S_IRUGO, mci_max_location_show, NULL);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700814
815/* memory scrubber attribute file */
Takashi Iwai2c1946b2015-02-04 11:48:51 +0100816DEVICE_ATTR(sdram_scrub_rate, 0, mci_sdram_scrub_rate_show,
817 mci_sdram_scrub_rate_store); /* umode set later in is_visible */
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700818
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300819static struct attribute *mci_attrs[] = {
820 &dev_attr_reset_counters.attr,
821 &dev_attr_mc_name.attr,
822 &dev_attr_size_mb.attr,
823 &dev_attr_seconds_since_reset.attr,
824 &dev_attr_ue_noinfo_count.attr,
825 &dev_attr_ce_noinfo_count.attr,
826 &dev_attr_ue_count.attr,
827 &dev_attr_ce_count.attr,
Mauro Carvalho Chehab8ad6c782012-03-21 17:13:24 -0300828 &dev_attr_max_location.attr,
Takashi Iwai2c1946b2015-02-04 11:48:51 +0100829 &dev_attr_sdram_scrub_rate.attr,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700830 NULL
831};
832
Takashi Iwai2c1946b2015-02-04 11:48:51 +0100833static umode_t mci_attr_is_visible(struct kobject *kobj,
834 struct attribute *attr, int idx)
835{
836 struct device *dev = kobj_to_dev(kobj);
837 struct mem_ctl_info *mci = to_mci(dev);
838 umode_t mode = 0;
839
840 if (attr != &dev_attr_sdram_scrub_rate.attr)
841 return attr->mode;
842 if (mci->get_sdram_scrub_rate)
843 mode |= S_IRUGO;
844 if (mci->set_sdram_scrub_rate)
845 mode |= S_IWUSR;
846 return mode;
847}
848
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300849static struct attribute_group mci_attr_grp = {
850 .attrs = mci_attrs,
Takashi Iwai2c1946b2015-02-04 11:48:51 +0100851 .is_visible = mci_attr_is_visible,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700852};
853
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300854static const struct attribute_group *mci_attr_groups[] = {
855 &mci_attr_grp,
856 NULL
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300857};
858
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300859static void mci_attr_release(struct device *dev)
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300860{
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300861 struct mem_ctl_info *mci = container_of(dev, struct mem_ctl_info, dev);
862
Joe Perches956b9ba2012-04-29 17:08:39 -0300863 edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev));
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300864 kfree(mci);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300865}
866
867static struct device_type mci_attr_type = {
868 .groups = mci_attr_groups,
869 .release = mci_attr_release,
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300870};
871
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700872/*
873 * Create a new Memory Controller kobject instance,
874 * mc<id> under the 'mc' directory
875 *
876 * Return:
877 * 0 Success
878 * !0 Failure
879 */
Takashi Iwai4e8d2302015-02-04 11:48:52 +0100880int edac_create_sysfs_mci_device(struct mem_ctl_info *mci,
881 const struct attribute_group **groups)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700882{
Borislav Petkov12e26962015-12-01 15:52:36 +0100883 char *name;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300884 int i, err;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700885
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300886 /*
887 * The memory controller needs its own bus, in order to avoid
888 * namespace conflicts at /sys/bus/edac.
Douglas Thompson42a8e392007-07-19 01:50:10 -0700889 */
Borislav Petkov12e26962015-12-01 15:52:36 +0100890 name = kasprintf(GFP_KERNEL, "mc%d", mci->mc_idx);
891 if (!name)
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300892 return -ENOMEM;
Borislav Petkov88d84ac2013-07-19 12:28:25 +0200893
Borislav Petkov12e26962015-12-01 15:52:36 +0100894 mci->bus->name = name;
895
Borislav Petkov88d84ac2013-07-19 12:28:25 +0200896 edac_dbg(0, "creating bus %s\n", mci->bus->name);
897
898 err = bus_register(mci->bus);
Borislav Petkov12e26962015-12-01 15:52:36 +0100899 if (err < 0) {
900 kfree(name);
901 return err;
902 }
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300903
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300904 /* get the /sys/devices/system/edac subsys reference */
905 mci->dev.type = &mci_attr_type;
906 device_initialize(&mci->dev);
907
908 mci->dev.parent = mci_pdev;
Borislav Petkov88d84ac2013-07-19 12:28:25 +0200909 mci->dev.bus = mci->bus;
Takashi Iwai4e8d2302015-02-04 11:48:52 +0100910 mci->dev.groups = groups;
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300911 dev_set_name(&mci->dev, "mc%d", mci->mc_idx);
912 dev_set_drvdata(&mci->dev, mci);
913 pm_runtime_forbid(&mci->dev);
914
Joe Perches956b9ba2012-04-29 17:08:39 -0300915 edac_dbg(0, "creating device %s\n", dev_name(&mci->dev));
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300916 err = device_add(&mci->dev);
917 if (err < 0) {
Mauro Carvalho Chehab3d958822013-02-15 07:51:25 -0300918 edac_dbg(1, "failure: create device %s\n", dev_name(&mci->dev));
Junjie Mao1bf19502015-01-29 09:13:55 +0800919 goto fail_unregister_bus;
Douglas Thompson42a8e392007-07-19 01:50:10 -0700920 }
921
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300922 /*
923 * Create the dimm/rank devices
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700924 */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300925 for (i = 0; i < mci->tot_dimms; i++) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300926 struct dimm_info *dimm = mci->dimms[i];
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300927 /* Only expose populated DIMMs */
Junjie Mao1bf19502015-01-29 09:13:55 +0800928 if (!dimm->nr_pages)
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300929 continue;
Junjie Mao1bf19502015-01-29 09:13:55 +0800930
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300931#ifdef CONFIG_EDAC_DEBUG
Joe Perches956b9ba2012-04-29 17:08:39 -0300932 edac_dbg(1, "creating dimm%d, located at ", i);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300933 if (edac_debug_level >= 1) {
934 int lay;
935 for (lay = 0; lay < mci->n_layers; lay++)
936 printk(KERN_CONT "%s %d ",
937 edac_layer_name[mci->layers[lay].type],
938 dimm->location[lay]);
939 printk(KERN_CONT "\n");
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700940 }
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300941#endif
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300942 err = edac_create_dimm_object(mci, dimm, i);
943 if (err) {
Joe Perches956b9ba2012-04-29 17:08:39 -0300944 edac_dbg(1, "failure: create dimm %d obj\n", i);
Junjie Mao1bf19502015-01-29 09:13:55 +0800945 goto fail_unregister_dimm;
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300946 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700947 }
948
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300949#ifdef CONFIG_EDAC_LEGACY_SYSFS
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300950 err = edac_create_csrow_objects(mci);
951 if (err < 0)
Junjie Mao1bf19502015-01-29 09:13:55 +0800952 goto fail_unregister_dimm;
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300953#endif
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300954
Borislav Petkov7ac8bf92015-09-22 11:56:04 +0200955 edac_create_debugfs_nodes(mci);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700956 return 0;
957
Junjie Mao1bf19502015-01-29 09:13:55 +0800958fail_unregister_dimm:
Douglas Thompson079708b2007-07-19 01:49:58 -0700959 for (i--; i >= 0; i--) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300960 struct dimm_info *dimm = mci->dimms[i];
Junjie Mao1bf19502015-01-29 09:13:55 +0800961 if (!dimm->nr_pages)
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300962 continue;
Junjie Mao1bf19502015-01-29 09:13:55 +0800963
Lans Zhang44d22e22012-12-24 14:01:34 +0100964 device_unregister(&dimm->dev);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700965 }
Lans Zhang44d22e22012-12-24 14:01:34 +0100966 device_unregister(&mci->dev);
Junjie Mao1bf19502015-01-29 09:13:55 +0800967fail_unregister_bus:
Borislav Petkov88d84ac2013-07-19 12:28:25 +0200968 bus_unregister(mci->bus);
Borislav Petkov12e26962015-12-01 15:52:36 +0100969 kfree(name);
970
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700971 return err;
972}
973
974/*
975 * remove a Memory Controller instance
976 */
977void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
978{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300979 int i;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700980
Joe Perches956b9ba2012-04-29 17:08:39 -0300981 edac_dbg(0, "\n");
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700982
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300983#ifdef CONFIG_EDAC_DEBUG
Tan Xiaojun30f84a82015-10-14 09:49:24 +0800984 edac_debugfs_remove_recursive(mci->debugfs);
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300985#endif
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300986#ifdef CONFIG_EDAC_LEGACY_SYSFS
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300987 edac_delete_csrow_objects(mci);
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300988#endif
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -0300989
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300990 for (i = 0; i < mci->tot_dimms; i++) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300991 struct dimm_info *dimm = mci->dimms[i];
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300992 if (dimm->nr_pages == 0)
993 continue;
Joe Perches956b9ba2012-04-29 17:08:39 -0300994 edac_dbg(0, "removing device %s\n", dev_name(&dimm->dev));
Lans Zhang44d22e22012-12-24 14:01:34 +0100995 device_unregister(&dimm->dev);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700996 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700997}
Doug Thompson8096cfa2007-07-19 01:50:27 -0700998
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300999void edac_unregister_sysfs(struct mem_ctl_info *mci)
Doug Thompson8096cfa2007-07-19 01:50:27 -07001000{
Borislav Petkov12e26962015-12-01 15:52:36 +01001001 const char *name = mci->bus->name;
1002
Joe Perches956b9ba2012-04-29 17:08:39 -03001003 edac_dbg(1, "Unregistering device %s\n", dev_name(&mci->dev));
Lans Zhang44d22e22012-12-24 14:01:34 +01001004 device_unregister(&mci->dev);
Borislav Petkov88d84ac2013-07-19 12:28:25 +02001005 bus_unregister(mci->bus);
Borislav Petkov12e26962015-12-01 15:52:36 +01001006 kfree(name);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001007}
Doug Thompson8096cfa2007-07-19 01:50:27 -07001008
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001009static void mc_attr_release(struct device *dev)
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001010{
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001011 /*
1012 * There's no container structure here, as this is just the mci
1013 * parent device, used to create the /sys/devices/mc sysfs node.
1014 * So, there are no attributes on it.
1015 */
Joe Perches956b9ba2012-04-29 17:08:39 -03001016 edac_dbg(1, "Releasing device %s\n", dev_name(dev));
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001017 kfree(dev);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001018}
1019
1020static struct device_type mc_attr_type = {
1021 .release = mc_attr_release,
1022};
1023/*
1024 * Init/exit code for the module. Basically, creates/removes /sys/class/rc
1025 */
1026int __init edac_mc_sysfs_init(void)
1027{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001028 int err;
Doug Thompson8096cfa2007-07-19 01:50:27 -07001029
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001030 mci_pdev = kzalloc(sizeof(*mci_pdev), GFP_KERNEL);
Denis Kirjanov2d56b102012-10-25 19:42:58 +04001031 if (!mci_pdev) {
1032 err = -ENOMEM;
Borislav Petkov733476c2015-11-27 11:40:43 +01001033 goto out;
Denis Kirjanov2d56b102012-10-25 19:42:58 +04001034 }
Doug Thompson8096cfa2007-07-19 01:50:27 -07001035
Borislav Petkovd4538002015-11-30 14:20:41 +01001036 mci_pdev->bus = edac_get_sysfs_subsys();
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001037 mci_pdev->type = &mc_attr_type;
1038 device_initialize(mci_pdev);
1039 dev_set_name(mci_pdev, "mc");
1040
1041 err = device_add(mci_pdev);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001042 if (err < 0)
Denis Kirjanov2d56b102012-10-25 19:42:58 +04001043 goto out_dev_free;
Doug Thompson8096cfa2007-07-19 01:50:27 -07001044
Joe Perches956b9ba2012-04-29 17:08:39 -03001045 edac_dbg(0, "device %s created\n", dev_name(mci_pdev));
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001046
Doug Thompson8096cfa2007-07-19 01:50:27 -07001047 return 0;
Denis Kirjanov2d56b102012-10-25 19:42:58 +04001048
1049 out_dev_free:
1050 kfree(mci_pdev);
Denis Kirjanov2d56b102012-10-25 19:42:58 +04001051 out:
1052 return err;
Doug Thompson8096cfa2007-07-19 01:50:27 -07001053}
1054
Alexey Khoroshilovc6b97bc2015-02-05 22:12:42 -08001055void edac_mc_sysfs_exit(void)
Doug Thompson8096cfa2007-07-19 01:50:27 -07001056{
Lans Zhang44d22e22012-12-24 14:01:34 +01001057 device_unregister(mci_pdev);
Doug Thompson8096cfa2007-07-19 01:50:27 -07001058}