Contributors: 35
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Mauro Carvalho Chehab |
1313 |
45.34% |
21 |
26.25% |
| Doug Thompson |
680 |
23.48% |
6 |
7.50% |
| Alan Cox |
211 |
7.29% |
2 |
2.50% |
| Robert Richter |
151 |
5.21% |
5 |
6.25% |
| Takashi Iwai |
101 |
3.49% |
2 |
2.50% |
| Arthur Jones |
70 |
2.42% |
3 |
3.75% |
| Xiongfeng Wang |
66 |
2.28% |
1 |
1.25% |
| Toshi Kani |
55 |
1.90% |
2 |
2.50% |
| Aaron Miller |
52 |
1.80% |
1 |
1.25% |
| Borislav Petkov |
50 |
1.73% |
8 |
10.00% |
| Dave Jiang |
39 |
1.35% |
3 |
3.75% |
| Joe Perches |
17 |
0.59% |
1 |
1.25% |
| Li Zhijian |
15 |
0.52% |
1 |
1.25% |
| Eiichi Tsukata |
11 |
0.38% |
1 |
1.25% |
| Denis Kirjanov |
11 |
0.38% |
1 |
1.25% |
| Greg Kroah-Hartman |
9 |
0.31% |
2 |
2.50% |
| Masahide Nakamura |
8 |
0.28% |
1 |
1.25% |
| Jingoo Han |
7 |
0.24% |
2 |
2.50% |
| Markus Trippelsdorf |
6 |
0.21% |
1 |
1.25% |
| Eric Badger |
4 |
0.14% |
1 |
1.25% |
| Arvind Yadav |
2 |
0.07% |
1 |
1.25% |
| Linus Torvalds (pre-git) |
2 |
0.07% |
1 |
1.25% |
| Lans Zhang |
2 |
0.07% |
1 |
1.25% |
| Jason Uhlenkott |
2 |
0.07% |
1 |
1.25% |
| Bhumika Goyal |
2 |
0.07% |
1 |
1.25% |
| Kees Cook |
1 |
0.03% |
1 |
1.25% |
| Tan Xiaojun |
1 |
0.03% |
1 |
1.25% |
| Johan Hovold |
1 |
0.03% |
1 |
1.25% |
| Linus Torvalds |
1 |
0.03% |
1 |
1.25% |
| Yan Zhen |
1 |
0.03% |
1 |
1.25% |
| Ben Dooks |
1 |
0.03% |
1 |
1.25% |
| Justin Stitt |
1 |
0.03% |
1 |
1.25% |
| Junjie Mao |
1 |
0.03% |
1 |
1.25% |
| Frithiof Jensen |
1 |
0.03% |
1 |
1.25% |
| Tony Luck |
1 |
0.03% |
1 |
1.25% |
| Total |
2896 |
|
80 |
|
/*
* edac_mc kernel module
* (C) 2005-2007 Linux Networx (http://lnxi.com)
*
* This file may be distributed under the terms of the
* GNU General Public License.
*
* Written Doug Thompson <norsk5@xmission.com> www.softwarebitmaker.com
*
* (c) 2012-2013 - Mauro Carvalho Chehab
* The entire API were re-written, and ported to use struct device
*
*/
#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/edac.h>
#include <linux/bug.h>
#include <linux/pm_runtime.h>
#include <linux/uaccess.h>
#include "edac_mc.h"
#include "edac_module.h"
/* MC EDAC Controls, setable by module parameter, and sysfs */
static int edac_mc_log_ue = 1;
static int edac_mc_log_ce = 1;
static int edac_mc_panic_on_ue;
static unsigned int edac_mc_poll_msec = 1000;
/* Getter functions for above */
int edac_mc_get_log_ue(void)
{
return edac_mc_log_ue;
}
int edac_mc_get_log_ce(void)
{
return edac_mc_log_ce;
}
int edac_mc_get_panic_on_ue(void)
{
return edac_mc_panic_on_ue;
}
/* this is temporary */
unsigned int edac_mc_get_poll_msec(void)
{
return edac_mc_poll_msec;
}
static int edac_set_poll_msec(const char *val, const struct kernel_param *kp)
{
unsigned int i;
int ret;
if (!val)
return -EINVAL;
ret = kstrtouint(val, 0, &i);
if (ret)
return ret;
if (i < 1000)
return -EINVAL;
*((unsigned int *)kp->arg) = i;
/* notify edac_mc engine to reset the poll period */
edac_mc_reset_delay_period(i);
return 0;
}
/* Parameter declarations for above */
module_param(edac_mc_panic_on_ue, int, 0644);
MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
module_param(edac_mc_log_ue, int, 0644);
MODULE_PARM_DESC(edac_mc_log_ue,
"Log uncorrectable error to console: 0=off 1=on");
module_param(edac_mc_log_ce, int, 0644);
MODULE_PARM_DESC(edac_mc_log_ce,
"Log correctable error to console: 0=off 1=on");
module_param_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_uint,
&edac_mc_poll_msec, 0644);
MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
static struct device *mci_pdev;
/*
* various constants for Memory Controllers
*/
static const char * const dev_types[] = {
[DEV_UNKNOWN] = "Unknown",
[DEV_X1] = "x1",
[DEV_X2] = "x2",
[DEV_X4] = "x4",
[DEV_X8] = "x8",
[DEV_X16] = "x16",
[DEV_X32] = "x32",
[DEV_X64] = "x64"
};
static const char * const edac_caps[] = {
[EDAC_UNKNOWN] = "Unknown",
[EDAC_NONE] = "None",
[EDAC_RESERVED] = "Reserved",
[EDAC_PARITY] = "PARITY",
[EDAC_EC] = "EC",
[EDAC_SECDED] = "SECDED",
[EDAC_S2ECD2ED] = "S2ECD2ED",
[EDAC_S4ECD4ED] = "S4ECD4ED",
[EDAC_S8ECD8ED] = "S8ECD8ED",
[EDAC_S16ECD16ED] = "S16ECD16ED"
};
/*
* Per-dimm (or per-rank) devices
*/
#define to_dimm(k) container_of(k, struct dimm_info, dev)
/* show/store functions for DIMM Label attributes */
static ssize_t dimmdev_location_show(struct device *dev,
struct device_attribute *mattr, char *data)
{
struct dimm_info *dimm = to_dimm(dev);
ssize_t count;
count = edac_dimm_info_location(dimm, data, PAGE_SIZE);
count += scnprintf(data + count, PAGE_SIZE - count, "\n");
return count;
}
static ssize_t dimmdev_label_show(struct device *dev,
struct device_attribute *mattr, char *data)
{
struct dimm_info *dimm = to_dimm(dev);
/* if field has not been initialized, there is nothing to send */
if (!dimm->label[0])
return 0;
return sysfs_emit(data, "%s\n", dimm->label);
}
static ssize_t dimmdev_label_store(struct device *dev,
struct device_attribute *mattr,
const char *data,
size_t count)
{
struct dimm_info *dimm = to_dimm(dev);
size_t copy_count = count;
if (count == 0)
return -EINVAL;
if (data[count - 1] == '\0' || data[count - 1] == '\n')
copy_count -= 1;
if (copy_count == 0 || copy_count >= sizeof(dimm->label))
return -EINVAL;
memcpy(dimm->label, data, copy_count);
dimm->label[copy_count] = '\0';
return count;
}
static ssize_t dimmdev_size_show(struct device *dev,
struct device_attribute *mattr, char *data)
{
struct dimm_info *dimm = to_dimm(dev);
return sysfs_emit(data, "%u\n", PAGES_TO_MiB(dimm->nr_pages));
}
static ssize_t dimmdev_mem_type_show(struct device *dev,
struct device_attribute *mattr, char *data)
{
struct dimm_info *dimm = to_dimm(dev);
return sysfs_emit(data, "%s\n", edac_mem_types[dimm->mtype]);
}
static ssize_t dimmdev_dev_type_show(struct device *dev,
struct device_attribute *mattr, char *data)
{
struct dimm_info *dimm = to_dimm(dev);
return sysfs_emit(data, "%s\n", dev_types[dimm->dtype]);
}
static ssize_t dimmdev_edac_mode_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct dimm_info *dimm = to_dimm(dev);
return sysfs_emit(data, "%s\n", edac_caps[dimm->edac_mode]);
}
static ssize_t dimmdev_ce_count_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct dimm_info *dimm = to_dimm(dev);
return sysfs_emit(data, "%u\n", dimm->ce_count);
}
static ssize_t dimmdev_ue_count_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct dimm_info *dimm = to_dimm(dev);
return sysfs_emit(data, "%u\n", dimm->ue_count);
}
/* dimm/rank attribute files */
static DEVICE_ATTR(dimm_label, S_IRUGO | S_IWUSR,
dimmdev_label_show, dimmdev_label_store);
static DEVICE_ATTR(dimm_location, S_IRUGO, dimmdev_location_show, NULL);
static DEVICE_ATTR(size, S_IRUGO, dimmdev_size_show, NULL);
static DEVICE_ATTR(dimm_mem_type, S_IRUGO, dimmdev_mem_type_show, NULL);
static DEVICE_ATTR(dimm_dev_type, S_IRUGO, dimmdev_dev_type_show, NULL);
static DEVICE_ATTR(dimm_edac_mode, S_IRUGO, dimmdev_edac_mode_show, NULL);
static DEVICE_ATTR(dimm_ce_count, S_IRUGO, dimmdev_ce_count_show, NULL);
static DEVICE_ATTR(dimm_ue_count, S_IRUGO, dimmdev_ue_count_show, NULL);
/* attributes of the dimm<id>/rank<id> object */
static struct attribute *dimm_attrs[] = {
&dev_attr_dimm_label.attr,
&dev_attr_dimm_location.attr,
&dev_attr_size.attr,
&dev_attr_dimm_mem_type.attr,
&dev_attr_dimm_dev_type.attr,
&dev_attr_dimm_edac_mode.attr,
&dev_attr_dimm_ce_count.attr,
&dev_attr_dimm_ue_count.attr,
NULL,
};
static const struct attribute_group dimm_attr_grp = {
.attrs = dimm_attrs,
};
static const struct attribute_group *dimm_attr_groups[] = {
&dimm_attr_grp,
NULL
};
static const struct device_type dimm_attr_type = {
.groups = dimm_attr_groups,
};
static void dimm_release(struct device *dev)
{
/*
* Nothing to do, just unregister sysfs here. The mci
* device owns the data and will also release it.
*/
}
/* Create a DIMM object under specified memory controller device */
static int edac_create_dimm_object(struct mem_ctl_info *mci,
struct dimm_info *dimm)
{
int err;
dimm->mci = mci;
dimm->dev.type = &dimm_attr_type;
dimm->dev.release = dimm_release;
device_initialize(&dimm->dev);
dimm->dev.parent = &mci->dev;
if (mci->csbased)
dev_set_name(&dimm->dev, "rank%d", dimm->idx);
else
dev_set_name(&dimm->dev, "dimm%d", dimm->idx);
dev_set_drvdata(&dimm->dev, dimm);
pm_runtime_forbid(&mci->dev);
err = device_add(&dimm->dev);
if (err) {
edac_dbg(1, "failure: create device %s\n", dev_name(&dimm->dev));
put_device(&dimm->dev);
return err;
}
if (IS_ENABLED(CONFIG_EDAC_DEBUG)) {
char location[80];
edac_dimm_info_location(dimm, location, sizeof(location));
edac_dbg(0, "device %s created at location %s\n",
dev_name(&dimm->dev), location);
}
return 0;
}
/*
* Memory controller device
*/
#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
static ssize_t mci_reset_counters_store(struct device *dev,
struct device_attribute *mattr,
const char *data, size_t count)
{
struct mem_ctl_info *mci = to_mci(dev);
struct dimm_info *dimm;
int row, chan;
mci->ue_mc = 0;
mci->ce_mc = 0;
mci->ue_noinfo_count = 0;
mci->ce_noinfo_count = 0;
for (row = 0; row < mci->nr_csrows; row++) {
struct csrow_info *ri = mci->csrows[row];
ri->ue_count = 0;
ri->ce_count = 0;
for (chan = 0; chan < ri->nr_channels; chan++)
ri->channels[chan]->ce_count = 0;
}
mci_for_each_dimm(mci, dimm) {
dimm->ue_count = 0;
dimm->ce_count = 0;
}
mci->start_time = jiffies;
return count;
}
/* Memory scrubbing interface:
*
* A MC driver can limit the scrubbing bandwidth based on the CPU type.
* Therefore, ->set_sdram_scrub_rate should be made to return the actual
* bandwidth that is accepted or 0 when scrubbing is to be disabled.
*
* Negative value still means that an error has occurred while setting
* the scrub rate.
*/
static ssize_t mci_sdram_scrub_rate_store(struct device *dev,
struct device_attribute *mattr,
const char *data, size_t count)
{
struct mem_ctl_info *mci = to_mci(dev);
unsigned long bandwidth = 0;
int new_bw = 0;
if (kstrtoul(data, 10, &bandwidth) < 0)
return -EINVAL;
new_bw = mci->set_sdram_scrub_rate(mci, bandwidth);
if (new_bw < 0) {
edac_printk(KERN_WARNING, EDAC_MC,
"Error setting scrub rate to: %lu\n", bandwidth);
return -EINVAL;
}
return count;
}
/*
* ->get_sdram_scrub_rate() return value semantics same as above.
*/
static ssize_t mci_sdram_scrub_rate_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct mem_ctl_info *mci = to_mci(dev);
int bandwidth = 0;
bandwidth = mci->get_sdram_scrub_rate(mci);
if (bandwidth < 0) {
edac_printk(KERN_DEBUG, EDAC_MC, "Error reading scrub rate\n");
return bandwidth;
}
return sysfs_emit(data, "%d\n", bandwidth);
}
/* default attribute files for the MCI object */
static ssize_t mci_ue_count_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct mem_ctl_info *mci = to_mci(dev);
return sysfs_emit(data, "%u\n", mci->ue_mc);
}
static ssize_t mci_ce_count_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct mem_ctl_info *mci = to_mci(dev);
return sysfs_emit(data, "%u\n", mci->ce_mc);
}
static ssize_t mci_ce_noinfo_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct mem_ctl_info *mci = to_mci(dev);
return sysfs_emit(data, "%u\n", mci->ce_noinfo_count);
}
static ssize_t mci_ue_noinfo_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct mem_ctl_info *mci = to_mci(dev);
return sysfs_emit(data, "%u\n", mci->ue_noinfo_count);
}
static ssize_t mci_seconds_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct mem_ctl_info *mci = to_mci(dev);
return sysfs_emit(data, "%ld\n", (jiffies - mci->start_time) / HZ);
}
static ssize_t mci_ctl_name_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct mem_ctl_info *mci = to_mci(dev);
return sysfs_emit(data, "%s\n", mci->ctl_name);
}
static ssize_t mci_size_mb_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct mem_ctl_info *mci = to_mci(dev);
int total_pages = 0, csrow_idx, j;
for (csrow_idx = 0; csrow_idx < mci->nr_csrows; csrow_idx++) {
struct csrow_info *csrow = mci->csrows[csrow_idx];
for (j = 0; j < csrow->nr_channels; j++) {
struct dimm_info *dimm = csrow->channels[j]->dimm;
total_pages += dimm->nr_pages;
}
}
return sysfs_emit(data, "%u\n", PAGES_TO_MiB(total_pages));
}
static ssize_t mci_max_location_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct mem_ctl_info *mci = to_mci(dev);
int len = PAGE_SIZE;
char *p = data;
int i, n;
for (i = 0; i < mci->n_layers; i++) {
n = scnprintf(p, len, "%s %d ",
edac_layer_name[mci->layers[i].type],
mci->layers[i].size - 1);
len -= n;
if (len <= 0)
goto out;
p += n;
}
p += scnprintf(p, len, "\n");
out:
return p - data;
}
/* default Control file */
static DEVICE_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
/* default Attribute files */
static DEVICE_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
static DEVICE_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
static DEVICE_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
static DEVICE_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
static DEVICE_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
static DEVICE_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
static DEVICE_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
static DEVICE_ATTR(max_location, S_IRUGO, mci_max_location_show, NULL);
/* memory scrubber attribute file */
static DEVICE_ATTR(sdram_scrub_rate, 0, mci_sdram_scrub_rate_show,
mci_sdram_scrub_rate_store); /* umode set later in is_visible */
static struct attribute *mci_attrs[] = {
&dev_attr_reset_counters.attr,
&dev_attr_mc_name.attr,
&dev_attr_size_mb.attr,
&dev_attr_seconds_since_reset.attr,
&dev_attr_ue_noinfo_count.attr,
&dev_attr_ce_noinfo_count.attr,
&dev_attr_ue_count.attr,
&dev_attr_ce_count.attr,
&dev_attr_max_location.attr,
&dev_attr_sdram_scrub_rate.attr,
NULL
};
static umode_t mci_attr_is_visible(struct kobject *kobj,
struct attribute *attr, int idx)
{
struct device *dev = kobj_to_dev(kobj);
struct mem_ctl_info *mci = to_mci(dev);
umode_t mode = 0;
if (attr != &dev_attr_sdram_scrub_rate.attr)
return attr->mode;
if (mci->get_sdram_scrub_rate)
mode |= S_IRUGO;
if (mci->set_sdram_scrub_rate)
mode |= S_IWUSR;
return mode;
}
static const struct attribute_group mci_attr_grp = {
.attrs = mci_attrs,
.is_visible = mci_attr_is_visible,
};
static const struct attribute_group *mci_attr_groups[] = {
&mci_attr_grp,
NULL
};
static const struct device_type mci_attr_type = {
.groups = mci_attr_groups,
};
/*
* Create a new Memory Controller kobject instance,
* mc<id> under the 'mc' directory
*
* Return:
* 0 Success
* !0 Failure
*/
int edac_create_sysfs_mci_device(struct mem_ctl_info *mci,
const struct attribute_group **groups)
{
struct dimm_info *dimm;
int err;
/* get the /sys/devices/system/edac subsys reference */
mci->dev.type = &mci_attr_type;
mci->dev.parent = mci_pdev;
mci->dev.groups = groups;
dev_set_name(&mci->dev, "mc%d", mci->mc_idx);
dev_set_drvdata(&mci->dev, mci);
pm_runtime_forbid(&mci->dev);
err = device_add(&mci->dev);
if (err < 0) {
edac_dbg(1, "failure: create device %s\n", dev_name(&mci->dev));
/* no put_device() here, free mci with _edac_mc_free() */
return err;
}
edac_dbg(0, "device %s created\n", dev_name(&mci->dev));
/*
* Create the dimm/rank devices
*/
mci_for_each_dimm(mci, dimm) {
/* Only expose populated DIMMs */
if (!dimm->nr_pages)
continue;
err = edac_create_dimm_object(mci, dimm);
if (err)
goto fail;
}
edac_create_debugfs_nodes(mci);
return 0;
fail:
edac_remove_sysfs_mci_device(mci);
return err;
}
/*
* remove a Memory Controller instance
*/
void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
{
struct dimm_info *dimm;
if (!device_is_registered(&mci->dev))
return;
edac_dbg(0, "\n");
#ifdef CONFIG_EDAC_DEBUG
edac_debugfs_remove_recursive(mci->debugfs);
#endif
mci_for_each_dimm(mci, dimm) {
if (!device_is_registered(&dimm->dev))
continue;
edac_dbg(1, "unregistering device %s\n", dev_name(&dimm->dev));
device_unregister(&dimm->dev);
}
/* only remove the device, but keep mci */
device_del(&mci->dev);
}
static void mc_attr_release(struct device *dev)
{
/*
* There's no container structure here, as this is just the mci
* parent device, used to create the /sys/devices/mc sysfs node.
* So, there are no attributes on it.
*/
edac_dbg(1, "device %s released\n", dev_name(dev));
kfree(dev);
}
/*
* Init/exit code for the module. Basically, creates/removes /sys/class/rc
*/
int __init edac_mc_sysfs_init(void)
{
int err;
mci_pdev = kzalloc(sizeof(*mci_pdev), GFP_KERNEL);
if (!mci_pdev)
return -ENOMEM;
mci_pdev->bus = edac_get_sysfs_subsys();
mci_pdev->release = mc_attr_release;
mci_pdev->init_name = "mc";
err = device_register(mci_pdev);
if (err < 0) {
edac_dbg(1, "failure: create device %s\n", dev_name(mci_pdev));
put_device(mci_pdev);
return err;
}
edac_dbg(0, "device %s created\n", dev_name(mci_pdev));
return 0;
}
void edac_mc_sysfs_exit(void)
{
device_unregister(mci_pdev);
}