blob: ed0bc07b85039deb78c09812e461e0c41e3b3670 [file] [log] [blame]
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001/*
2 * edac_mc kernel module
Douglas Thompson42a8e392007-07-19 01:50:10 -07003 * (C) 2005-2007 Linux Networx (http://lnxi.com)
4 *
Douglas Thompson7c9281d2007-07-19 01:49:33 -07005 * This file may be distributed under the terms of the
6 * GNU General Public License.
7 *
Douglas Thompson42a8e392007-07-19 01:50:10 -07008 * Written Doug Thompson <norsk5@xmission.com> www.softwarebitmaker.com
Douglas Thompson7c9281d2007-07-19 01:49:33 -07009 *
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -030010 * (c) 2012 - Mauro Carvalho Chehab <mchehab@redhat.com>
11 * 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{
55 long l;
56 int ret;
57
58 if (!val)
59 return -EINVAL;
60
61 ret = strict_strtol(val, 0, &l);
62 if (ret == -EINVAL || ((int)l != l))
63 return -EINVAL;
64 *((int *)kp->arg) = l;
65
66 /* notify edac_mc engine to reset the poll period */
67 edac_mc_reset_delay_period(l);
68
69 return 0;
70}
71
Douglas Thompson7c9281d2007-07-19 01:49:33 -070072/* Parameter declarations for above */
Dave Jiang4de78c62007-07-19 01:49:54 -070073module_param(edac_mc_panic_on_ue, int, 0644);
74MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
75module_param(edac_mc_log_ue, int, 0644);
76MODULE_PARM_DESC(edac_mc_log_ue,
Douglas Thompson079708b2007-07-19 01:49:58 -070077 "Log uncorrectable error to console: 0=off 1=on");
Dave Jiang4de78c62007-07-19 01:49:54 -070078module_param(edac_mc_log_ce, int, 0644);
79MODULE_PARM_DESC(edac_mc_log_ce,
Douglas Thompson079708b2007-07-19 01:49:58 -070080 "Log correctable error to console: 0=off 1=on");
Arthur Jones096846e2008-07-25 01:49:09 -070081module_param_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_int,
82 &edac_mc_poll_msec, 0644);
Dave Jiang4de78c62007-07-19 01:49:54 -070083MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
Douglas Thompson7c9281d2007-07-19 01:49:33 -070084
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -030085static struct device *mci_pdev;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -030086
Douglas Thompson7c9281d2007-07-19 01:49:33 -070087/*
88 * various constants for Memory Controllers
89 */
90static const char *mem_types[] = {
91 [MEM_EMPTY] = "Empty",
92 [MEM_RESERVED] = "Reserved",
93 [MEM_UNKNOWN] = "Unknown",
94 [MEM_FPM] = "FPM",
95 [MEM_EDO] = "EDO",
96 [MEM_BEDO] = "BEDO",
97 [MEM_SDR] = "Unbuffered-SDR",
98 [MEM_RDR] = "Registered-SDR",
99 [MEM_DDR] = "Unbuffered-DDR",
100 [MEM_RDDR] = "Registered-DDR",
Dave Jiang1a9b85e2007-07-19 01:49:38 -0700101 [MEM_RMBS] = "RMBS",
102 [MEM_DDR2] = "Unbuffered-DDR2",
103 [MEM_FB_DDR2] = "FullyBuffered-DDR2",
Benjamin Herrenschmidt1d5f7262008-02-07 00:14:52 -0800104 [MEM_RDDR2] = "Registered-DDR2",
Yang Shib1cfebc2009-06-30 11:41:22 -0700105 [MEM_XDR] = "XDR",
106 [MEM_DDR3] = "Unbuffered-DDR3",
107 [MEM_RDDR3] = "Registered-DDR3"
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700108};
109
110static const char *dev_types[] = {
111 [DEV_UNKNOWN] = "Unknown",
112 [DEV_X1] = "x1",
113 [DEV_X2] = "x2",
114 [DEV_X4] = "x4",
115 [DEV_X8] = "x8",
116 [DEV_X16] = "x16",
117 [DEV_X32] = "x32",
118 [DEV_X64] = "x64"
119};
120
121static const char *edac_caps[] = {
122 [EDAC_UNKNOWN] = "Unknown",
123 [EDAC_NONE] = "None",
124 [EDAC_RESERVED] = "Reserved",
125 [EDAC_PARITY] = "PARITY",
126 [EDAC_EC] = "EC",
127 [EDAC_SECDED] = "SECDED",
128 [EDAC_S2ECD2ED] = "S2ECD2ED",
129 [EDAC_S4ECD4ED] = "S4ECD4ED",
130 [EDAC_S8ECD8ED] = "S8ECD8ED",
131 [EDAC_S16ECD16ED] = "S16ECD16ED"
132};
133
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300134#ifdef CONFIG_EDAC_LEGACY_SYSFS
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300135/*
136 * EDAC sysfs CSROW data structures and methods
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700137 */
138
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300139#define to_csrow(k) container_of(k, struct csrow_info, dev)
140
141/*
142 * We need it to avoid namespace conflicts between the legacy API
143 * and the per-dimm/per-rank one
144 */
145#define DEVICE_ATTR_LEGACY(_name, _mode, _show, _store) \
146 struct device_attribute dev_attr_legacy_##_name = __ATTR(_name, _mode, _show, _store)
147
148struct dev_ch_attribute {
149 struct device_attribute attr;
150 int channel;
151};
152
153#define DEVICE_CHANNEL(_name, _mode, _show, _store, _var) \
154 struct dev_ch_attribute dev_attr_legacy_##_name = \
155 { __ATTR(_name, _mode, _show, _store), (_var) }
156
157#define to_channel(k) (container_of(k, struct dev_ch_attribute, attr)->channel)
158
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700159/* Set of more default csrow<id> attribute show/store functions */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300160static ssize_t csrow_ue_count_show(struct device *dev,
161 struct device_attribute *mattr, char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700162{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300163 struct csrow_info *csrow = to_csrow(dev);
164
Douglas Thompson079708b2007-07-19 01:49:58 -0700165 return sprintf(data, "%u\n", csrow->ue_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700166}
167
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300168static ssize_t csrow_ce_count_show(struct device *dev,
169 struct device_attribute *mattr, char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700170{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300171 struct csrow_info *csrow = to_csrow(dev);
172
Douglas Thompson079708b2007-07-19 01:49:58 -0700173 return sprintf(data, "%u\n", csrow->ce_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700174}
175
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300176static ssize_t csrow_size_show(struct device *dev,
177 struct device_attribute *mattr, char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700178{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300179 struct csrow_info *csrow = to_csrow(dev);
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -0300180 int i;
181 u32 nr_pages = 0;
182
183 for (i = 0; i < csrow->nr_channels; i++)
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300184 nr_pages += csrow->channels[i]->dimm->nr_pages;
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -0300185 return sprintf(data, "%u\n", PAGES_TO_MiB(nr_pages));
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700186}
187
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300188static ssize_t csrow_mem_type_show(struct device *dev,
189 struct device_attribute *mattr, char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700190{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300191 struct csrow_info *csrow = to_csrow(dev);
192
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300193 return sprintf(data, "%s\n", mem_types[csrow->channels[0]->dimm->mtype]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700194}
195
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300196static ssize_t csrow_dev_type_show(struct device *dev,
197 struct device_attribute *mattr, char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700198{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300199 struct csrow_info *csrow = to_csrow(dev);
200
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300201 return sprintf(data, "%s\n", dev_types[csrow->channels[0]->dimm->dtype]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700202}
203
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300204static ssize_t csrow_edac_mode_show(struct device *dev,
205 struct device_attribute *mattr,
206 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700207{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300208 struct csrow_info *csrow = to_csrow(dev);
209
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300210 return sprintf(data, "%s\n", edac_caps[csrow->channels[0]->dimm->edac_mode]);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700211}
212
213/* show/store functions for DIMM Label attributes */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300214static ssize_t channel_dimm_label_show(struct device *dev,
215 struct device_attribute *mattr,
216 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700217{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300218 struct csrow_info *csrow = to_csrow(dev);
219 unsigned chan = to_channel(mattr);
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300220 struct rank_info *rank = csrow->channels[chan];
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300221
Arthur Jones124682c2008-07-25 01:49:12 -0700222 /* if field has not been initialized, there is nothing to send */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300223 if (!rank->dimm->label[0])
Arthur Jones124682c2008-07-25 01:49:12 -0700224 return 0;
225
226 return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n",
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300227 rank->dimm->label);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700228}
229
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300230static ssize_t channel_dimm_label_store(struct device *dev,
231 struct device_attribute *mattr,
232 const char *data, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700233{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300234 struct csrow_info *csrow = to_csrow(dev);
235 unsigned chan = to_channel(mattr);
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300236 struct rank_info *rank = csrow->channels[chan];
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300237
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700238 ssize_t max_size = 0;
239
Douglas Thompson079708b2007-07-19 01:49:58 -0700240 max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300241 strncpy(rank->dimm->label, data, max_size);
242 rank->dimm->label[max_size] = '\0';
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700243
244 return max_size;
245}
246
247/* show function for dynamic chX_ce_count attribute */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300248static ssize_t channel_ce_count_show(struct device *dev,
249 struct device_attribute *mattr, char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700250{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300251 struct csrow_info *csrow = to_csrow(dev);
252 unsigned chan = to_channel(mattr);
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300253 struct rank_info *rank = csrow->channels[chan];
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300254
255 return sprintf(data, "%u\n", rank->ce_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700256}
257
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300258/* cwrow<id>/attribute files */
259DEVICE_ATTR_LEGACY(size_mb, S_IRUGO, csrow_size_show, NULL);
260DEVICE_ATTR_LEGACY(dev_type, S_IRUGO, csrow_dev_type_show, NULL);
261DEVICE_ATTR_LEGACY(mem_type, S_IRUGO, csrow_mem_type_show, NULL);
262DEVICE_ATTR_LEGACY(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL);
263DEVICE_ATTR_LEGACY(ue_count, S_IRUGO, csrow_ue_count_show, NULL);
264DEVICE_ATTR_LEGACY(ce_count, S_IRUGO, csrow_ce_count_show, NULL);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700265
266/* default attributes of the CSROW<id> object */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300267static struct attribute *csrow_attrs[] = {
268 &dev_attr_legacy_dev_type.attr,
269 &dev_attr_legacy_mem_type.attr,
270 &dev_attr_legacy_edac_mode.attr,
271 &dev_attr_legacy_size_mb.attr,
272 &dev_attr_legacy_ue_count.attr,
273 &dev_attr_legacy_ce_count.attr,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700274 NULL,
275};
276
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300277static struct attribute_group csrow_attr_grp = {
278 .attrs = csrow_attrs,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700279};
280
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300281static const struct attribute_group *csrow_attr_groups[] = {
282 &csrow_attr_grp,
283 NULL
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700284};
285
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300286static void csrow_attr_release(struct device *dev)
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300287{
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300288 struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);
289
Joe Perches956b9ba2012-04-29 17:08:39 -0300290 edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev));
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300291 kfree(csrow);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300292}
293
294static struct device_type csrow_attr_type = {
295 .groups = csrow_attr_groups,
296 .release = csrow_attr_release,
297};
298
299/*
300 * possible dynamic channel DIMM Label attribute files
301 *
302 */
303
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700304#define EDAC_NR_CHANNELS 6
305
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300306DEVICE_CHANNEL(ch0_dimm_label, S_IRUGO | S_IWUSR,
307 channel_dimm_label_show, channel_dimm_label_store, 0);
308DEVICE_CHANNEL(ch1_dimm_label, S_IRUGO | S_IWUSR,
309 channel_dimm_label_show, channel_dimm_label_store, 1);
310DEVICE_CHANNEL(ch2_dimm_label, S_IRUGO | S_IWUSR,
311 channel_dimm_label_show, channel_dimm_label_store, 2);
312DEVICE_CHANNEL(ch3_dimm_label, S_IRUGO | S_IWUSR,
313 channel_dimm_label_show, channel_dimm_label_store, 3);
314DEVICE_CHANNEL(ch4_dimm_label, S_IRUGO | S_IWUSR,
315 channel_dimm_label_show, channel_dimm_label_store, 4);
316DEVICE_CHANNEL(ch5_dimm_label, S_IRUGO | S_IWUSR,
317 channel_dimm_label_show, channel_dimm_label_store, 5);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700318
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300319/* Total possible dynamic DIMM Label attribute file table */
320static struct device_attribute *dynamic_csrow_dimm_attr[] = {
321 &dev_attr_legacy_ch0_dimm_label.attr,
322 &dev_attr_legacy_ch1_dimm_label.attr,
323 &dev_attr_legacy_ch2_dimm_label.attr,
324 &dev_attr_legacy_ch3_dimm_label.attr,
325 &dev_attr_legacy_ch4_dimm_label.attr,
326 &dev_attr_legacy_ch5_dimm_label.attr
327};
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700328
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300329/* possible dynamic channel ce_count attribute files */
330DEVICE_CHANNEL(ch0_ce_count, S_IRUGO | S_IWUSR,
331 channel_ce_count_show, NULL, 0);
332DEVICE_CHANNEL(ch1_ce_count, S_IRUGO | S_IWUSR,
333 channel_ce_count_show, NULL, 1);
334DEVICE_CHANNEL(ch2_ce_count, S_IRUGO | S_IWUSR,
335 channel_ce_count_show, NULL, 2);
336DEVICE_CHANNEL(ch3_ce_count, S_IRUGO | S_IWUSR,
337 channel_ce_count_show, NULL, 3);
338DEVICE_CHANNEL(ch4_ce_count, S_IRUGO | S_IWUSR,
339 channel_ce_count_show, NULL, 4);
340DEVICE_CHANNEL(ch5_ce_count, S_IRUGO | S_IWUSR,
341 channel_ce_count_show, NULL, 5);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700342
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300343/* Total possible dynamic ce_count attribute file table */
344static struct device_attribute *dynamic_csrow_ce_count_attr[] = {
345 &dev_attr_legacy_ch0_ce_count.attr,
346 &dev_attr_legacy_ch1_ce_count.attr,
347 &dev_attr_legacy_ch2_ce_count.attr,
348 &dev_attr_legacy_ch3_ce_count.attr,
349 &dev_attr_legacy_ch4_ce_count.attr,
350 &dev_attr_legacy_ch5_ce_count.attr
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700351};
352
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300353static inline int nr_pages_per_csrow(struct csrow_info *csrow)
354{
355 int chan, nr_pages = 0;
356
357 for (chan = 0; chan < csrow->nr_channels; chan++)
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300358 nr_pages += csrow->channels[chan]->dimm->nr_pages;
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300359
360 return nr_pages;
361}
362
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700363/* Create a CSROW object under specifed edac_mc_device */
Doug Thompson8096cfa2007-07-19 01:50:27 -0700364static int edac_create_csrow_object(struct mem_ctl_info *mci,
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300365 struct csrow_info *csrow, int index)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700366{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300367 int err, chan;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700368
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300369 if (csrow->nr_channels >= EDAC_NR_CHANNELS)
370 return -ENODEV;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700371
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300372 csrow->dev.type = &csrow_attr_type;
373 csrow->dev.bus = &mci->bus;
374 device_initialize(&csrow->dev);
375 csrow->dev.parent = &mci->dev;
376 dev_set_name(&csrow->dev, "csrow%d", index);
377 dev_set_drvdata(&csrow->dev, csrow);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700378
Joe Perches956b9ba2012-04-29 17:08:39 -0300379 edac_dbg(0, "creating (virtual) csrow node %s\n",
380 dev_name(&csrow->dev));
Doug Thompson8096cfa2007-07-19 01:50:27 -0700381
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300382 err = device_add(&csrow->dev);
383 if (err < 0)
384 return err;
Doug Thompson8096cfa2007-07-19 01:50:27 -0700385
Doug Thompson8096cfa2007-07-19 01:50:27 -0700386 for (chan = 0; chan < csrow->nr_channels; chan++) {
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300387 /* Only expose populated DIMMs */
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300388 if (!csrow->channels[chan]->dimm->nr_pages)
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300389 continue;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300390 err = device_create_file(&csrow->dev,
391 dynamic_csrow_dimm_attr[chan]);
392 if (err < 0)
393 goto error;
394 err = device_create_file(&csrow->dev,
395 dynamic_csrow_ce_count_attr[chan]);
396 if (err < 0) {
397 device_remove_file(&csrow->dev,
398 dynamic_csrow_dimm_attr[chan]);
399 goto error;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700400 }
401 }
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300402
Doug Thompson8096cfa2007-07-19 01:50:27 -0700403 return 0;
404
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300405error:
406 for (--chan; chan >= 0; chan--) {
407 device_remove_file(&csrow->dev,
408 dynamic_csrow_dimm_attr[chan]);
409 device_remove_file(&csrow->dev,
410 dynamic_csrow_ce_count_attr[chan]);
411 }
412 put_device(&csrow->dev);
Doug Thompson8096cfa2007-07-19 01:50:27 -0700413
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700414 return err;
415}
416
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300417/* Create a CSROW object under specifed edac_mc_device */
418static int edac_create_csrow_objects(struct mem_ctl_info *mci)
419{
420 int err, i, chan;
421 struct csrow_info *csrow;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700422
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300423 for (i = 0; i < mci->nr_csrows; i++) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300424 csrow = mci->csrows[i];
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300425 if (!nr_pages_per_csrow(csrow))
426 continue;
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300427 err = edac_create_csrow_object(mci, mci->csrows[i], i);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300428 if (err < 0)
429 goto error;
430 }
431 return 0;
432
433error:
434 for (--i; i >= 0; i--) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300435 csrow = mci->csrows[i];
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300436 if (!nr_pages_per_csrow(csrow))
437 continue;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300438 for (chan = csrow->nr_channels - 1; chan >= 0; chan--) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300439 if (!csrow->channels[chan]->dimm->nr_pages)
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300440 continue;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300441 device_remove_file(&csrow->dev,
442 dynamic_csrow_dimm_attr[chan]);
443 device_remove_file(&csrow->dev,
444 dynamic_csrow_ce_count_attr[chan]);
445 }
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300446 put_device(&mci->csrows[i]->dev);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300447 }
448
449 return err;
450}
451
452static void edac_delete_csrow_objects(struct mem_ctl_info *mci)
453{
454 int i, chan;
455 struct csrow_info *csrow;
456
457 for (i = mci->nr_csrows - 1; i >= 0; i--) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300458 csrow = mci->csrows[i];
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300459 if (!nr_pages_per_csrow(csrow))
460 continue;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300461 for (chan = csrow->nr_channels - 1; chan >= 0; chan--) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300462 if (!csrow->channels[chan]->dimm->nr_pages)
Mauro Carvalho Chehabe39f4ea2012-03-29 12:20:22 -0300463 continue;
Joe Perches956b9ba2012-04-29 17:08:39 -0300464 edac_dbg(1, "Removing csrow %d channel %d sysfs nodes\n",
465 i, chan);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300466 device_remove_file(&csrow->dev,
467 dynamic_csrow_dimm_attr[chan]);
468 device_remove_file(&csrow->dev,
469 dynamic_csrow_ce_count_attr[chan]);
470 }
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300471 put_device(&mci->csrows[i]->dev);
472 device_del(&mci->csrows[i]->dev);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300473 }
474}
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300475#endif
476
477/*
478 * Per-dimm (or per-rank) devices
479 */
480
481#define to_dimm(k) container_of(k, struct dimm_info, dev)
482
483/* show/store functions for DIMM Label attributes */
484static ssize_t dimmdev_location_show(struct device *dev,
485 struct device_attribute *mattr, char *data)
486{
487 struct dimm_info *dimm = to_dimm(dev);
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300488
Mauro Carvalho Chehab6e84d352012-04-30 10:24:43 -0300489 return edac_dimm_info_location(dimm, data, PAGE_SIZE);
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300490}
491
492static ssize_t dimmdev_label_show(struct device *dev,
493 struct device_attribute *mattr, char *data)
494{
495 struct dimm_info *dimm = to_dimm(dev);
496
497 /* if field has not been initialized, there is nothing to send */
498 if (!dimm->label[0])
499 return 0;
500
501 return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n", dimm->label);
502}
503
504static ssize_t dimmdev_label_store(struct device *dev,
505 struct device_attribute *mattr,
506 const char *data,
507 size_t count)
508{
509 struct dimm_info *dimm = to_dimm(dev);
510
511 ssize_t max_size = 0;
512
513 max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
514 strncpy(dimm->label, data, max_size);
515 dimm->label[max_size] = '\0';
516
517 return max_size;
518}
519
520static ssize_t dimmdev_size_show(struct device *dev,
521 struct device_attribute *mattr, char *data)
522{
523 struct dimm_info *dimm = to_dimm(dev);
524
525 return sprintf(data, "%u\n", PAGES_TO_MiB(dimm->nr_pages));
526}
527
528static ssize_t dimmdev_mem_type_show(struct device *dev,
529 struct device_attribute *mattr, char *data)
530{
531 struct dimm_info *dimm = to_dimm(dev);
532
533 return sprintf(data, "%s\n", mem_types[dimm->mtype]);
534}
535
536static ssize_t dimmdev_dev_type_show(struct device *dev,
537 struct device_attribute *mattr, char *data)
538{
539 struct dimm_info *dimm = to_dimm(dev);
540
541 return sprintf(data, "%s\n", dev_types[dimm->dtype]);
542}
543
544static ssize_t dimmdev_edac_mode_show(struct device *dev,
545 struct device_attribute *mattr,
546 char *data)
547{
548 struct dimm_info *dimm = to_dimm(dev);
549
550 return sprintf(data, "%s\n", edac_caps[dimm->edac_mode]);
551}
552
553/* dimm/rank attribute files */
554static DEVICE_ATTR(dimm_label, S_IRUGO | S_IWUSR,
555 dimmdev_label_show, dimmdev_label_store);
556static DEVICE_ATTR(dimm_location, S_IRUGO, dimmdev_location_show, NULL);
557static DEVICE_ATTR(size, S_IRUGO, dimmdev_size_show, NULL);
558static DEVICE_ATTR(dimm_mem_type, S_IRUGO, dimmdev_mem_type_show, NULL);
559static DEVICE_ATTR(dimm_dev_type, S_IRUGO, dimmdev_dev_type_show, NULL);
560static DEVICE_ATTR(dimm_edac_mode, S_IRUGO, dimmdev_edac_mode_show, NULL);
561
562/* attributes of the dimm<id>/rank<id> object */
563static struct attribute *dimm_attrs[] = {
564 &dev_attr_dimm_label.attr,
565 &dev_attr_dimm_location.attr,
566 &dev_attr_size.attr,
567 &dev_attr_dimm_mem_type.attr,
568 &dev_attr_dimm_dev_type.attr,
569 &dev_attr_dimm_edac_mode.attr,
570 NULL,
571};
572
573static struct attribute_group dimm_attr_grp = {
574 .attrs = dimm_attrs,
575};
576
577static const struct attribute_group *dimm_attr_groups[] = {
578 &dimm_attr_grp,
579 NULL
580};
581
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300582static void dimm_attr_release(struct device *dev)
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300583{
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300584 struct dimm_info *dimm = container_of(dev, struct dimm_info, dev);
585
Joe Perches956b9ba2012-04-29 17:08:39 -0300586 edac_dbg(1, "Releasing dimm device %s\n", dev_name(dev));
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300587 kfree(dimm);
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300588}
589
590static struct device_type dimm_attr_type = {
591 .groups = dimm_attr_groups,
592 .release = dimm_attr_release,
593};
594
595/* Create a DIMM object under specifed memory controller device */
596static int edac_create_dimm_object(struct mem_ctl_info *mci,
597 struct dimm_info *dimm,
598 int index)
599{
600 int err;
601 dimm->mci = mci;
602
603 dimm->dev.type = &dimm_attr_type;
604 dimm->dev.bus = &mci->bus;
605 device_initialize(&dimm->dev);
606
607 dimm->dev.parent = &mci->dev;
608 if (mci->mem_is_per_rank)
609 dev_set_name(&dimm->dev, "rank%d", index);
610 else
611 dev_set_name(&dimm->dev, "dimm%d", index);
612 dev_set_drvdata(&dimm->dev, dimm);
613 pm_runtime_forbid(&mci->dev);
614
615 err = device_add(&dimm->dev);
616
Joe Perches956b9ba2012-04-29 17:08:39 -0300617 edac_dbg(0, "creating rank/dimm device %s\n", dev_name(&dimm->dev));
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -0300618
619 return err;
620}
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300621
622/*
623 * Memory controller device
624 */
625
626#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
627
628static ssize_t mci_reset_counters_store(struct device *dev,
629 struct device_attribute *mattr,
Douglas Thompson079708b2007-07-19 01:49:58 -0700630 const char *data, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700631{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300632 struct mem_ctl_info *mci = to_mci(dev);
633 int cnt, row, chan, i;
Mauro Carvalho Chehab5926ff52012-02-09 11:05:20 -0300634 mci->ue_mc = 0;
635 mci->ce_mc = 0;
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300636 mci->ue_noinfo_count = 0;
637 mci->ce_noinfo_count = 0;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700638
639 for (row = 0; row < mci->nr_csrows; row++) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300640 struct csrow_info *ri = mci->csrows[row];
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700641
642 ri->ue_count = 0;
643 ri->ce_count = 0;
644
645 for (chan = 0; chan < ri->nr_channels; chan++)
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300646 ri->channels[chan]->ce_count = 0;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700647 }
648
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300649 cnt = 1;
650 for (i = 0; i < mci->n_layers; i++) {
651 cnt *= mci->layers[i].size;
652 memset(mci->ce_per_layer[i], 0, cnt * sizeof(u32));
653 memset(mci->ue_per_layer[i], 0, cnt * sizeof(u32));
654 }
655
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700656 mci->start_time = jiffies;
657 return count;
658}
659
Borislav Petkov39094442010-11-24 19:52:09 +0100660/* Memory scrubbing interface:
661 *
662 * A MC driver can limit the scrubbing bandwidth based on the CPU type.
663 * Therefore, ->set_sdram_scrub_rate should be made to return the actual
664 * bandwidth that is accepted or 0 when scrubbing is to be disabled.
665 *
666 * Negative value still means that an error has occurred while setting
667 * the scrub rate.
668 */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300669static ssize_t mci_sdram_scrub_rate_store(struct device *dev,
670 struct device_attribute *mattr,
Borislav Petkoveba042a2010-05-25 18:21:07 +0200671 const char *data, size_t count)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700672{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300673 struct mem_ctl_info *mci = to_mci(dev);
Borislav Petkoveba042a2010-05-25 18:21:07 +0200674 unsigned long bandwidth = 0;
Borislav Petkov39094442010-11-24 19:52:09 +0100675 int new_bw = 0;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700676
Borislav Petkov39094442010-11-24 19:52:09 +0100677 if (!mci->set_sdram_scrub_rate)
Borislav Petkov5e8e19b2011-09-21 14:10:43 +0200678 return -ENODEV;
Borislav Petkoveba042a2010-05-25 18:21:07 +0200679
680 if (strict_strtoul(data, 10, &bandwidth) < 0)
681 return -EINVAL;
682
Borislav Petkov39094442010-11-24 19:52:09 +0100683 new_bw = mci->set_sdram_scrub_rate(mci, bandwidth);
Markus Trippelsdorf49496032011-04-20 14:28:45 -0400684 if (new_bw < 0) {
685 edac_printk(KERN_WARNING, EDAC_MC,
686 "Error setting scrub rate to: %lu\n", bandwidth);
687 return -EINVAL;
Borislav Petkoveba042a2010-05-25 18:21:07 +0200688 }
Borislav Petkov39094442010-11-24 19:52:09 +0100689
Markus Trippelsdorf49496032011-04-20 14:28:45 -0400690 return count;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700691}
692
Borislav Petkov39094442010-11-24 19:52:09 +0100693/*
694 * ->get_sdram_scrub_rate() return value semantics same as above.
695 */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300696static ssize_t mci_sdram_scrub_rate_show(struct device *dev,
697 struct device_attribute *mattr,
698 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700699{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300700 struct mem_ctl_info *mci = to_mci(dev);
Borislav Petkov39094442010-11-24 19:52:09 +0100701 int bandwidth = 0;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700702
Borislav Petkov39094442010-11-24 19:52:09 +0100703 if (!mci->get_sdram_scrub_rate)
Borislav Petkov5e8e19b2011-09-21 14:10:43 +0200704 return -ENODEV;
Borislav Petkov39094442010-11-24 19:52:09 +0100705
706 bandwidth = mci->get_sdram_scrub_rate(mci);
707 if (bandwidth < 0) {
708 edac_printk(KERN_DEBUG, EDAC_MC, "Error reading scrub rate\n");
709 return bandwidth;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700710 }
Borislav Petkoveba042a2010-05-25 18:21:07 +0200711
Borislav Petkov39094442010-11-24 19:52:09 +0100712 return sprintf(data, "%d\n", bandwidth);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700713}
714
715/* default attribute files for the MCI object */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300716static ssize_t mci_ue_count_show(struct device *dev,
717 struct device_attribute *mattr,
718 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700719{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300720 struct mem_ctl_info *mci = to_mci(dev);
721
Mauro Carvalho Chehab5926ff52012-02-09 11:05:20 -0300722 return sprintf(data, "%d\n", mci->ue_mc);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700723}
724
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300725static ssize_t mci_ce_count_show(struct device *dev,
726 struct device_attribute *mattr,
727 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700728{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300729 struct mem_ctl_info *mci = to_mci(dev);
730
Mauro Carvalho Chehab5926ff52012-02-09 11:05:20 -0300731 return sprintf(data, "%d\n", mci->ce_mc);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700732}
733
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300734static ssize_t mci_ce_noinfo_show(struct device *dev,
735 struct device_attribute *mattr,
736 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700737{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300738 struct mem_ctl_info *mci = to_mci(dev);
739
Douglas Thompson079708b2007-07-19 01:49:58 -0700740 return sprintf(data, "%d\n", mci->ce_noinfo_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700741}
742
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300743static ssize_t mci_ue_noinfo_show(struct device *dev,
744 struct device_attribute *mattr,
745 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700746{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300747 struct mem_ctl_info *mci = to_mci(dev);
748
Douglas Thompson079708b2007-07-19 01:49:58 -0700749 return sprintf(data, "%d\n", mci->ue_noinfo_count);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700750}
751
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300752static ssize_t mci_seconds_show(struct device *dev,
753 struct device_attribute *mattr,
754 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700755{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300756 struct mem_ctl_info *mci = to_mci(dev);
757
Douglas Thompson079708b2007-07-19 01:49:58 -0700758 return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700759}
760
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300761static ssize_t mci_ctl_name_show(struct device *dev,
762 struct device_attribute *mattr,
763 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700764{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300765 struct mem_ctl_info *mci = to_mci(dev);
766
Douglas Thompson079708b2007-07-19 01:49:58 -0700767 return sprintf(data, "%s\n", mci->ctl_name);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700768}
769
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300770static ssize_t mci_size_mb_show(struct device *dev,
771 struct device_attribute *mattr,
772 char *data)
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700773{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300774 struct mem_ctl_info *mci = to_mci(dev);
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -0300775 int total_pages = 0, csrow_idx, j;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700776
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -0300777 for (csrow_idx = 0; csrow_idx < mci->nr_csrows; csrow_idx++) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300778 struct csrow_info *csrow = mci->csrows[csrow_idx];
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700779
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -0300780 for (j = 0; j < csrow->nr_channels; j++) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300781 struct dimm_info *dimm = csrow->channels[j]->dimm;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700782
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -0300783 total_pages += dimm->nr_pages;
784 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700785 }
786
Douglas Thompson079708b2007-07-19 01:49:58 -0700787 return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700788}
789
Mauro Carvalho Chehab8ad6c782012-03-21 17:13:24 -0300790static ssize_t mci_max_location_show(struct device *dev,
791 struct device_attribute *mattr,
792 char *data)
793{
794 struct mem_ctl_info *mci = to_mci(dev);
795 int i;
796 char *p = data;
797
798 for (i = 0; i < mci->n_layers; i++) {
799 p += sprintf(p, "%s %d ",
800 edac_layer_name[mci->layers[i].type],
801 mci->layers[i].size - 1);
802 }
803
804 return p - data;
805}
806
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300807#ifdef CONFIG_EDAC_DEBUG
808static ssize_t edac_fake_inject_write(struct file *file,
809 const char __user *data,
810 size_t count, loff_t *ppos)
811{
812 struct device *dev = file->private_data;
813 struct mem_ctl_info *mci = to_mci(dev);
814 static enum hw_event_mc_err_type type;
Mauro Carvalho Chehab38ced282012-06-12 10:55:57 -0300815 u16 errcount = mci->fake_inject_count;
816
817 if (!errcount)
818 errcount = 1;
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300819
820 type = mci->fake_inject_ue ? HW_EVENT_ERR_UNCORRECTED
821 : HW_EVENT_ERR_CORRECTED;
822
823 printk(KERN_DEBUG
Mauro Carvalho Chehab38ced282012-06-12 10:55:57 -0300824 "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",
825 errcount,
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300826 (type == HW_EVENT_ERR_UNCORRECTED) ? "UE" : "CE",
Mauro Carvalho Chehab38ced282012-06-12 10:55:57 -0300827 errcount > 1 ? "s" : "",
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300828 mci->fake_inject_layer[0],
829 mci->fake_inject_layer[1],
830 mci->fake_inject_layer[2]
831 );
Mauro Carvalho Chehab38ced282012-06-12 10:55:57 -0300832 edac_mc_handle_error(type, mci, errcount, 0, 0, 0,
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300833 mci->fake_inject_layer[0],
834 mci->fake_inject_layer[1],
835 mci->fake_inject_layer[2],
Mauro Carvalho Chehab03f7eae2012-06-04 11:29:25 -0300836 "FAKE ERROR", "for EDAC testing only");
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300837
838 return count;
839}
840
841static int debugfs_open(struct inode *inode, struct file *file)
842{
843 file->private_data = inode->i_private;
844 return 0;
845}
846
847static const struct file_operations debug_fake_inject_fops = {
848 .open = debugfs_open,
849 .write = edac_fake_inject_write,
850 .llseek = generic_file_llseek,
851};
852#endif
853
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700854/* default Control file */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300855DEVICE_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700856
857/* default Attribute files */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300858DEVICE_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
859DEVICE_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
860DEVICE_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
861DEVICE_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
862DEVICE_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
863DEVICE_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
864DEVICE_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
Mauro Carvalho Chehab8ad6c782012-03-21 17:13:24 -0300865DEVICE_ATTR(max_location, S_IRUGO, mci_max_location_show, NULL);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700866
867/* memory scrubber attribute file */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300868DEVICE_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700869 mci_sdram_scrub_rate_store);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700870
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300871static struct attribute *mci_attrs[] = {
872 &dev_attr_reset_counters.attr,
873 &dev_attr_mc_name.attr,
874 &dev_attr_size_mb.attr,
875 &dev_attr_seconds_since_reset.attr,
876 &dev_attr_ue_noinfo_count.attr,
877 &dev_attr_ce_noinfo_count.attr,
878 &dev_attr_ue_count.attr,
879 &dev_attr_ce_count.attr,
880 &dev_attr_sdram_scrub_rate.attr,
Mauro Carvalho Chehab8ad6c782012-03-21 17:13:24 -0300881 &dev_attr_max_location.attr,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700882 NULL
883};
884
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300885static struct attribute_group mci_attr_grp = {
886 .attrs = mci_attrs,
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700887};
888
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300889static const struct attribute_group *mci_attr_groups[] = {
890 &mci_attr_grp,
891 NULL
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300892};
893
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300894static void mci_attr_release(struct device *dev)
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300895{
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300896 struct mem_ctl_info *mci = container_of(dev, struct mem_ctl_info, dev);
897
Joe Perches956b9ba2012-04-29 17:08:39 -0300898 edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev));
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300899 kfree(mci);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300900}
901
902static struct device_type mci_attr_type = {
903 .groups = mci_attr_groups,
904 .release = mci_attr_release,
Mauro Carvalho Chehabcc301b32009-09-24 16:23:42 -0300905};
906
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300907#ifdef CONFIG_EDAC_DEBUG
Rob Herringe7930ba2012-06-11 21:32:12 -0500908static struct dentry *edac_debugfs;
909
910int __init edac_debugfs_init(void)
911{
912 edac_debugfs = debugfs_create_dir("edac", NULL);
913 if (IS_ERR(edac_debugfs)) {
914 edac_debugfs = NULL;
915 return -ENOMEM;
916 }
917 return 0;
918}
919
920void __exit edac_debugfs_exit(void)
921{
922 debugfs_remove(edac_debugfs);
923}
924
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300925int edac_create_debug_nodes(struct mem_ctl_info *mci)
926{
927 struct dentry *d, *parent;
928 char name[80];
929 int i;
930
Rob Herringe7930ba2012-06-11 21:32:12 -0500931 if (!edac_debugfs)
932 return -ENODEV;
933
934 d = debugfs_create_dir(mci->dev.kobj.name, edac_debugfs);
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300935 if (!d)
936 return -ENOMEM;
937 parent = d;
938
939 for (i = 0; i < mci->n_layers; i++) {
940 sprintf(name, "fake_inject_%s",
941 edac_layer_name[mci->layers[i].type]);
942 d = debugfs_create_u8(name, S_IRUGO | S_IWUSR, parent,
943 &mci->fake_inject_layer[i]);
944 if (!d)
945 goto nomem;
946 }
947
948 d = debugfs_create_bool("fake_inject_ue", S_IRUGO | S_IWUSR, parent,
949 &mci->fake_inject_ue);
950 if (!d)
951 goto nomem;
952
Mauro Carvalho Chehab38ced282012-06-12 10:55:57 -0300953 d = debugfs_create_u16("fake_inject_count", S_IRUGO | S_IWUSR, parent,
954 &mci->fake_inject_count);
955 if (!d)
956 goto nomem;
957
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300958 d = debugfs_create_file("fake_inject", S_IWUSR, parent,
959 &mci->dev,
960 &debug_fake_inject_fops);
961 if (!d)
962 goto nomem;
963
Rob Herringe7930ba2012-06-11 21:32:12 -0500964 mci->debugfs = parent;
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -0300965 return 0;
966nomem:
967 debugfs_remove(mci->debugfs);
968 return -ENOMEM;
969}
970#endif
971
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700972/*
973 * Create a new Memory Controller kobject instance,
974 * mc<id> under the 'mc' directory
975 *
976 * Return:
977 * 0 Success
978 * !0 Failure
979 */
980int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
981{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300982 int i, err;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700983
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300984 /*
985 * The memory controller needs its own bus, in order to avoid
986 * namespace conflicts at /sys/bus/edac.
Douglas Thompson42a8e392007-07-19 01:50:10 -0700987 */
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300988 mci->bus.name = kasprintf(GFP_KERNEL, "mc%d", mci->mc_idx);
989 if (!mci->bus.name)
990 return -ENOMEM;
Joe Perches956b9ba2012-04-29 17:08:39 -0300991 edac_dbg(0, "creating bus %s\n", mci->bus.name);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300992 err = bus_register(&mci->bus);
993 if (err < 0)
994 return err;
995
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -0300996 /* get the /sys/devices/system/edac subsys reference */
997 mci->dev.type = &mci_attr_type;
998 device_initialize(&mci->dev);
999
1000 mci->dev.parent = mci_pdev;
1001 mci->dev.bus = &mci->bus;
1002 dev_set_name(&mci->dev, "mc%d", mci->mc_idx);
1003 dev_set_drvdata(&mci->dev, mci);
1004 pm_runtime_forbid(&mci->dev);
1005
Joe Perches956b9ba2012-04-29 17:08:39 -03001006 edac_dbg(0, "creating device %s\n", dev_name(&mci->dev));
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001007 err = device_add(&mci->dev);
1008 if (err < 0) {
1009 bus_unregister(&mci->bus);
1010 kfree(mci->bus.name);
1011 return err;
Douglas Thompson42a8e392007-07-19 01:50:10 -07001012 }
1013
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001014 /*
1015 * Create the dimm/rank devices
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001016 */
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001017 for (i = 0; i < mci->tot_dimms; i++) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001018 struct dimm_info *dimm = mci->dimms[i];
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001019 /* Only expose populated DIMMs */
1020 if (dimm->nr_pages == 0)
1021 continue;
1022#ifdef CONFIG_EDAC_DEBUG
Joe Perches956b9ba2012-04-29 17:08:39 -03001023 edac_dbg(1, "creating dimm%d, located at ", i);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001024 if (edac_debug_level >= 1) {
1025 int lay;
1026 for (lay = 0; lay < mci->n_layers; lay++)
1027 printk(KERN_CONT "%s %d ",
1028 edac_layer_name[mci->layers[lay].type],
1029 dimm->location[lay]);
1030 printk(KERN_CONT "\n");
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001031 }
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001032#endif
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -03001033 err = edac_create_dimm_object(mci, dimm, i);
1034 if (err) {
Joe Perches956b9ba2012-04-29 17:08:39 -03001035 edac_dbg(1, "failure: create dimm %d obj\n", i);
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -03001036 goto fail;
1037 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001038 }
1039
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -03001040#ifdef CONFIG_EDAC_LEGACY_SYSFS
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001041 err = edac_create_csrow_objects(mci);
1042 if (err < 0)
1043 goto fail;
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -03001044#endif
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001045
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -03001046#ifdef CONFIG_EDAC_DEBUG
1047 edac_create_debug_nodes(mci);
1048#endif
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001049 return 0;
1050
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001051fail:
Douglas Thompson079708b2007-07-19 01:49:58 -07001052 for (i--; i >= 0; i--) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001053 struct dimm_info *dimm = mci->dimms[i];
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001054 if (dimm->nr_pages == 0)
1055 continue;
1056 put_device(&dimm->dev);
1057 device_del(&dimm->dev);
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001058 }
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001059 put_device(&mci->dev);
1060 device_del(&mci->dev);
1061 bus_unregister(&mci->bus);
1062 kfree(mci->bus.name);
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001063 return err;
1064}
1065
1066/*
1067 * remove a Memory Controller instance
1068 */
1069void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
1070{
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001071 int i;
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001072
Joe Perches956b9ba2012-04-29 17:08:39 -03001073 edac_dbg(0, "\n");
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001074
Mauro Carvalho Chehab452a6bf2012-03-26 09:35:11 -03001075#ifdef CONFIG_EDAC_DEBUG
1076 debugfs_remove(mci->debugfs);
1077#endif
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -03001078#ifdef CONFIG_EDAC_LEGACY_SYSFS
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001079 edac_delete_csrow_objects(mci);
Mauro Carvalho Chehab19974712012-03-21 17:06:53 -03001080#endif
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -03001081
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001082 for (i = 0; i < mci->tot_dimms; i++) {
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001083 struct dimm_info *dimm = mci->dimms[i];
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001084 if (dimm->nr_pages == 0)
1085 continue;
Joe Perches956b9ba2012-04-29 17:08:39 -03001086 edac_dbg(0, "removing device %s\n", dev_name(&dimm->dev));
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001087 put_device(&dimm->dev);
1088 device_del(&dimm->dev);
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001089 }
Douglas Thompson7c9281d2007-07-19 01:49:33 -07001090}
Doug Thompson8096cfa2007-07-19 01:50:27 -07001091
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001092void edac_unregister_sysfs(struct mem_ctl_info *mci)
Doug Thompson8096cfa2007-07-19 01:50:27 -07001093{
Joe Perches956b9ba2012-04-29 17:08:39 -03001094 edac_dbg(1, "Unregistering device %s\n", dev_name(&mci->dev));
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001095 put_device(&mci->dev);
1096 device_del(&mci->dev);
1097 bus_unregister(&mci->bus);
1098 kfree(mci->bus.name);
1099}
Doug Thompson8096cfa2007-07-19 01:50:27 -07001100
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001101static void mc_attr_release(struct device *dev)
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001102{
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001103 /*
1104 * There's no container structure here, as this is just the mci
1105 * parent device, used to create the /sys/devices/mc sysfs node.
1106 * So, there are no attributes on it.
1107 */
Joe Perches956b9ba2012-04-29 17:08:39 -03001108 edac_dbg(1, "Releasing device %s\n", dev_name(dev));
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001109 kfree(dev);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001110}
1111
1112static struct device_type mc_attr_type = {
1113 .release = mc_attr_release,
1114};
1115/*
1116 * Init/exit code for the module. Basically, creates/removes /sys/class/rc
1117 */
1118int __init edac_mc_sysfs_init(void)
1119{
1120 struct bus_type *edac_subsys;
1121 int err;
Doug Thompson8096cfa2007-07-19 01:50:27 -07001122
Kay Sieversfe5ff8b2011-12-14 15:21:07 -08001123 /* get the /sys/devices/system/edac subsys reference */
1124 edac_subsys = edac_get_sysfs_subsys();
1125 if (edac_subsys == NULL) {
Joe Perches956b9ba2012-04-29 17:08:39 -03001126 edac_dbg(1, "no edac_subsys\n");
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001127 return -EINVAL;
Doug Thompson8096cfa2007-07-19 01:50:27 -07001128 }
1129
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001130 mci_pdev = kzalloc(sizeof(*mci_pdev), GFP_KERNEL);
Doug Thompson8096cfa2007-07-19 01:50:27 -07001131
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001132 mci_pdev->bus = edac_subsys;
1133 mci_pdev->type = &mc_attr_type;
1134 device_initialize(mci_pdev);
1135 dev_set_name(mci_pdev, "mc");
1136
1137 err = device_add(mci_pdev);
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001138 if (err < 0)
1139 return err;
Doug Thompson8096cfa2007-07-19 01:50:27 -07001140
Joe Perches956b9ba2012-04-29 17:08:39 -03001141 edac_dbg(0, "device %s created\n", dev_name(mci_pdev));
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001142
Doug Thompson8096cfa2007-07-19 01:50:27 -07001143 return 0;
Doug Thompson8096cfa2007-07-19 01:50:27 -07001144}
1145
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -03001146void __exit edac_mc_sysfs_exit(void)
Doug Thompson8096cfa2007-07-19 01:50:27 -07001147{
Mauro Carvalho Chehabde3910eb2012-04-24 15:05:43 -03001148 put_device(mci_pdev);
1149 device_del(mci_pdev);
Kay Sieversfe5ff8b2011-12-14 15:21:07 -08001150 edac_put_sysfs_subsys();
Doug Thompson8096cfa2007-07-19 01:50:27 -07001151}