Revision 676fc8de319335b840934c57ec75bdbbf049b738 authored by Linus Torvalds on 07 March 2020, 13:59:30 UTC, committed by Linus Torvalds on 07 March 2020, 13:59:30 UTC
Pull sound fixes from Takashi Iwai: "The regular "bump-in-the-middle" updates, containing mostly ASoC- related fixes at this time. All changes are reasonably small. A few entries are for ASoC and ALSA core parts (DAPM, PCM, topology) for followups of the recent changes and potential buffer overflow by snprintf(), while the rest are (both new and old) device-specific fixes for Intel, meson, tas2562, rt1015, as well as the usual HD-audio quirks" * tag 'sound-5.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (25 commits) ALSA: sgio2audio: Remove usage of dropped hw_params/hw_free functions ALSA: hda/realtek - Enable the headset of ASUS B9450FA with ALC294 ALSA: hda/realtek - Fix silent output on Gigabyte X570 Aorus Master ALSA: hda/realtek - Add Headset Button supported for ThinkPad X1 ALSA: hda/realtek - Add Headset Mic supported ASoC: wm8741: Fix typo in Kconfig prompt ASoC: stm32: sai: manage rebind issue ASoC: SOF: Fix snd_sof_ipc_stream_posn() ASoC: rt1015: modify pre-divider for sysclk ASoC: rt1015: add operation callback function for rt1015_dai[] ASoC: soc-component: tidyup snd_soc_pcm_component_sync_stop() ASoC: dapm: Correct DAPM handling of active widgets during shutdown ASoC: tas2562: Fix sample rate error message ASoC: Intel: Skylake: Fix available clock counter incrementation ASoC: soc-pcm/soc-compress: don't use snd_soc_dapm_stream_stop() ASoC: meson: g12a: add tohdmitx reset ASoC: pcm512x: Fix unbalanced regulator enable call in probe error path ASoC: soc-core: fix for_rtd_codec_dai_rollback() macro ASoC: topology: Fix memleak in soc_tplg_manifest_load() ASoC: topology: Fix memleak in soc_tplg_link_elems_load() ...
edac_mc_sysfs.c
/*
* 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"
};
#ifdef CONFIG_EDAC_LEGACY_SYSFS
/*
* EDAC sysfs CSROW data structures and methods
*/
#define to_csrow(k) container_of(k, struct csrow_info, dev)
/*
* We need it to avoid namespace conflicts between the legacy API
* and the per-dimm/per-rank one
*/
#define DEVICE_ATTR_LEGACY(_name, _mode, _show, _store) \
static struct device_attribute dev_attr_legacy_##_name = __ATTR(_name, _mode, _show, _store)
struct dev_ch_attribute {
struct device_attribute attr;
unsigned int channel;
};
#define DEVICE_CHANNEL(_name, _mode, _show, _store, _var) \
static struct dev_ch_attribute dev_attr_legacy_##_name = \
{ __ATTR(_name, _mode, _show, _store), (_var) }
#define to_channel(k) (container_of(k, struct dev_ch_attribute, attr)->channel)
/* Set of more default csrow<id> attribute show/store functions */
static ssize_t csrow_ue_count_show(struct device *dev,
struct device_attribute *mattr, char *data)
{
struct csrow_info *csrow = to_csrow(dev);
return sprintf(data, "%u\n", csrow->ue_count);
}
static ssize_t csrow_ce_count_show(struct device *dev,
struct device_attribute *mattr, char *data)
{
struct csrow_info *csrow = to_csrow(dev);
return sprintf(data, "%u\n", csrow->ce_count);
}
static ssize_t csrow_size_show(struct device *dev,
struct device_attribute *mattr, char *data)
{
struct csrow_info *csrow = to_csrow(dev);
int i;
u32 nr_pages = 0;
for (i = 0; i < csrow->nr_channels; i++)
nr_pages += csrow->channels[i]->dimm->nr_pages;
return sprintf(data, "%u\n", PAGES_TO_MiB(nr_pages));
}
static ssize_t csrow_mem_type_show(struct device *dev,
struct device_attribute *mattr, char *data)
{
struct csrow_info *csrow = to_csrow(dev);
return sprintf(data, "%s\n", edac_mem_types[csrow->channels[0]->dimm->mtype]);
}
static ssize_t csrow_dev_type_show(struct device *dev,
struct device_attribute *mattr, char *data)
{
struct csrow_info *csrow = to_csrow(dev);
return sprintf(data, "%s\n", dev_types[csrow->channels[0]->dimm->dtype]);
}
static ssize_t csrow_edac_mode_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct csrow_info *csrow = to_csrow(dev);
return sprintf(data, "%s\n", edac_caps[csrow->channels[0]->dimm->edac_mode]);
}
/* show/store functions for DIMM Label attributes */
static ssize_t channel_dimm_label_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct csrow_info *csrow = to_csrow(dev);
unsigned int chan = to_channel(mattr);
struct rank_info *rank = csrow->channels[chan];
/* if field has not been initialized, there is nothing to send */
if (!rank->dimm->label[0])
return 0;
return snprintf(data, sizeof(rank->dimm->label) + 1, "%s\n",
rank->dimm->label);
}
static ssize_t channel_dimm_label_store(struct device *dev,
struct device_attribute *mattr,
const char *data, size_t count)
{
struct csrow_info *csrow = to_csrow(dev);
unsigned int chan = to_channel(mattr);
struct rank_info *rank = csrow->channels[chan];
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(rank->dimm->label))
return -EINVAL;
strncpy(rank->dimm->label, data, copy_count);
rank->dimm->label[copy_count] = '\0';
return count;
}
/* show function for dynamic chX_ce_count attribute */
static ssize_t channel_ce_count_show(struct device *dev,
struct device_attribute *mattr, char *data)
{
struct csrow_info *csrow = to_csrow(dev);
unsigned int chan = to_channel(mattr);
struct rank_info *rank = csrow->channels[chan];
return sprintf(data, "%u\n", rank->ce_count);
}
/* cwrow<id>/attribute files */
DEVICE_ATTR_LEGACY(size_mb, S_IRUGO, csrow_size_show, NULL);
DEVICE_ATTR_LEGACY(dev_type, S_IRUGO, csrow_dev_type_show, NULL);
DEVICE_ATTR_LEGACY(mem_type, S_IRUGO, csrow_mem_type_show, NULL);
DEVICE_ATTR_LEGACY(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL);
DEVICE_ATTR_LEGACY(ue_count, S_IRUGO, csrow_ue_count_show, NULL);
DEVICE_ATTR_LEGACY(ce_count, S_IRUGO, csrow_ce_count_show, NULL);
/* default attributes of the CSROW<id> object */
static struct attribute *csrow_attrs[] = {
&dev_attr_legacy_dev_type.attr,
&dev_attr_legacy_mem_type.attr,
&dev_attr_legacy_edac_mode.attr,
&dev_attr_legacy_size_mb.attr,
&dev_attr_legacy_ue_count.attr,
&dev_attr_legacy_ce_count.attr,
NULL,
};
static const struct attribute_group csrow_attr_grp = {
.attrs = csrow_attrs,
};
static const struct attribute_group *csrow_attr_groups[] = {
&csrow_attr_grp,
NULL
};
static void csrow_attr_release(struct device *dev)
{
/* release device with _edac_mc_free() */
}
static const struct device_type csrow_attr_type = {
.groups = csrow_attr_groups,
.release = csrow_attr_release,
};
/*
* possible dynamic channel DIMM Label attribute files
*
*/
DEVICE_CHANNEL(ch0_dimm_label, S_IRUGO | S_IWUSR,
channel_dimm_label_show, channel_dimm_label_store, 0);
DEVICE_CHANNEL(ch1_dimm_label, S_IRUGO | S_IWUSR,
channel_dimm_label_show, channel_dimm_label_store, 1);
DEVICE_CHANNEL(ch2_dimm_label, S_IRUGO | S_IWUSR,
channel_dimm_label_show, channel_dimm_label_store, 2);
DEVICE_CHANNEL(ch3_dimm_label, S_IRUGO | S_IWUSR,
channel_dimm_label_show, channel_dimm_label_store, 3);
DEVICE_CHANNEL(ch4_dimm_label, S_IRUGO | S_IWUSR,
channel_dimm_label_show, channel_dimm_label_store, 4);
DEVICE_CHANNEL(ch5_dimm_label, S_IRUGO | S_IWUSR,
channel_dimm_label_show, channel_dimm_label_store, 5);
DEVICE_CHANNEL(ch6_dimm_label, S_IRUGO | S_IWUSR,
channel_dimm_label_show, channel_dimm_label_store, 6);
DEVICE_CHANNEL(ch7_dimm_label, S_IRUGO | S_IWUSR,
channel_dimm_label_show, channel_dimm_label_store, 7);
/* Total possible dynamic DIMM Label attribute file table */
static struct attribute *dynamic_csrow_dimm_attr[] = {
&dev_attr_legacy_ch0_dimm_label.attr.attr,
&dev_attr_legacy_ch1_dimm_label.attr.attr,
&dev_attr_legacy_ch2_dimm_label.attr.attr,
&dev_attr_legacy_ch3_dimm_label.attr.attr,
&dev_attr_legacy_ch4_dimm_label.attr.attr,
&dev_attr_legacy_ch5_dimm_label.attr.attr,
&dev_attr_legacy_ch6_dimm_label.attr.attr,
&dev_attr_legacy_ch7_dimm_label.attr.attr,
NULL
};
/* possible dynamic channel ce_count attribute files */
DEVICE_CHANNEL(ch0_ce_count, S_IRUGO,
channel_ce_count_show, NULL, 0);
DEVICE_CHANNEL(ch1_ce_count, S_IRUGO,
channel_ce_count_show, NULL, 1);
DEVICE_CHANNEL(ch2_ce_count, S_IRUGO,
channel_ce_count_show, NULL, 2);
DEVICE_CHANNEL(ch3_ce_count, S_IRUGO,
channel_ce_count_show, NULL, 3);
DEVICE_CHANNEL(ch4_ce_count, S_IRUGO,
channel_ce_count_show, NULL, 4);
DEVICE_CHANNEL(ch5_ce_count, S_IRUGO,
channel_ce_count_show, NULL, 5);
DEVICE_CHANNEL(ch6_ce_count, S_IRUGO,
channel_ce_count_show, NULL, 6);
DEVICE_CHANNEL(ch7_ce_count, S_IRUGO,
channel_ce_count_show, NULL, 7);
/* Total possible dynamic ce_count attribute file table */
static struct attribute *dynamic_csrow_ce_count_attr[] = {
&dev_attr_legacy_ch0_ce_count.attr.attr,
&dev_attr_legacy_ch1_ce_count.attr.attr,
&dev_attr_legacy_ch2_ce_count.attr.attr,
&dev_attr_legacy_ch3_ce_count.attr.attr,
&dev_attr_legacy_ch4_ce_count.attr.attr,
&dev_attr_legacy_ch5_ce_count.attr.attr,
&dev_attr_legacy_ch6_ce_count.attr.attr,
&dev_attr_legacy_ch7_ce_count.attr.attr,
NULL
};
static umode_t csrow_dev_is_visible(struct kobject *kobj,
struct attribute *attr, int idx)
{
struct device *dev = kobj_to_dev(kobj);
struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);
if (idx >= csrow->nr_channels)
return 0;
if (idx >= ARRAY_SIZE(dynamic_csrow_ce_count_attr) - 1) {
WARN_ONCE(1, "idx: %d\n", idx);
return 0;
}
/* Only expose populated DIMMs */
if (!csrow->channels[idx]->dimm->nr_pages)
return 0;
return attr->mode;
}
static const struct attribute_group csrow_dev_dimm_group = {
.attrs = dynamic_csrow_dimm_attr,
.is_visible = csrow_dev_is_visible,
};
static const struct attribute_group csrow_dev_ce_count_group = {
.attrs = dynamic_csrow_ce_count_attr,
.is_visible = csrow_dev_is_visible,
};
static const struct attribute_group *csrow_dev_groups[] = {
&csrow_dev_dimm_group,
&csrow_dev_ce_count_group,
NULL
};
static inline int nr_pages_per_csrow(struct csrow_info *csrow)
{
int chan, nr_pages = 0;
for (chan = 0; chan < csrow->nr_channels; chan++)
nr_pages += csrow->channels[chan]->dimm->nr_pages;
return nr_pages;
}
/* Create a CSROW object under specifed edac_mc_device */
static int edac_create_csrow_object(struct mem_ctl_info *mci,
struct csrow_info *csrow, int index)
{
int err;
csrow->dev.type = &csrow_attr_type;
csrow->dev.groups = csrow_dev_groups;
device_initialize(&csrow->dev);
csrow->dev.parent = &mci->dev;
csrow->mci = mci;
dev_set_name(&csrow->dev, "csrow%d", index);
dev_set_drvdata(&csrow->dev, csrow);
err = device_add(&csrow->dev);
if (err) {
edac_dbg(1, "failure: create device %s\n", dev_name(&csrow->dev));
put_device(&csrow->dev);
return err;
}
edac_dbg(0, "device %s created\n", dev_name(&csrow->dev));
return 0;
}
/* Create a CSROW object under specifed edac_mc_device */
static int edac_create_csrow_objects(struct mem_ctl_info *mci)
{
int err, i;
struct csrow_info *csrow;
for (i = 0; i < mci->nr_csrows; i++) {
csrow = mci->csrows[i];
if (!nr_pages_per_csrow(csrow))
continue;
err = edac_create_csrow_object(mci, mci->csrows[i], i);
if (err < 0)
goto error;
}
return 0;
error:
for (--i; i >= 0; i--) {
csrow = mci->csrows[i];
if (!nr_pages_per_csrow(csrow))
continue;
device_unregister(&mci->csrows[i]->dev);
}
return err;
}
static void edac_delete_csrow_objects(struct mem_ctl_info *mci)
{
int i;
struct csrow_info *csrow;
for (i = mci->nr_csrows - 1; i >= 0; i--) {
csrow = mci->csrows[i];
if (!nr_pages_per_csrow(csrow))
continue;
device_unregister(&mci->csrows[i]->dev);
}
}
#endif
/*
* 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);
return edac_dimm_info_location(dimm, data, PAGE_SIZE);
}
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 snprintf(data, sizeof(dimm->label) + 1, "%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;
strncpy(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 sprintf(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 sprintf(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 sprintf(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 sprintf(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);
u32 count;
count = dimm->mci->ce_per_layer[dimm->mci->n_layers-1][dimm->idx];
return sprintf(data, "%u\n", count);
}
static ssize_t dimmdev_ue_count_show(struct device *dev,
struct device_attribute *mattr,
char *data)
{
struct dimm_info *dimm = to_dimm(dev);
u32 count;
count = dimm->mci->ue_per_layer[dimm->mci->n_layers-1][dimm->idx];
return sprintf(data, "%u\n", 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 void dimm_attr_release(struct device *dev)
{
/* release device with _edac_mc_free() */
}
static const struct device_type dimm_attr_type = {
.groups = dimm_attr_groups,
.release = dimm_attr_release,
};
/* Create a DIMM object under specifed 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;
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);
int cnt, row, chan, i;
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;
}
cnt = 1;
for (i = 0; i < mci->n_layers; i++) {
cnt *= mci->layers[i].size;
memset(mci->ce_per_layer[i], 0, cnt * sizeof(u32));
memset(mci->ue_per_layer[i], 0, cnt * sizeof(u32));
}
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 sprintf(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 sprintf(data, "%d\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 sprintf(data, "%d\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 sprintf(data, "%d\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 sprintf(data, "%d\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 sprintf(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 sprintf(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 sprintf(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 i;
char *p = data;
for (i = 0; i < mci->n_layers; i++) {
p += sprintf(p, "%s %d ",
edac_layer_name[mci->layers[i].type],
mci->layers[i].size - 1);
}
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 void mci_attr_release(struct device *dev)
{
/* release device with _edac_mc_free() */
}
static const struct device_type mci_attr_type = {
.groups = mci_attr_groups,
.release = mci_attr_release,
};
/*
* 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;
device_initialize(&mci->dev);
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));
put_device(&mci->dev);
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_unregister_dimm;
}
#ifdef CONFIG_EDAC_LEGACY_SYSFS
err = edac_create_csrow_objects(mci);
if (err < 0)
goto fail_unregister_dimm;
#endif
edac_create_debugfs_nodes(mci);
return 0;
fail_unregister_dimm:
mci_for_each_dimm(mci, dimm) {
if (device_is_registered(&dimm->dev))
device_unregister(&dimm->dev);
}
device_unregister(&mci->dev);
return err;
}
/*
* remove a Memory Controller instance
*/
void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
{
struct dimm_info *dimm;
edac_dbg(0, "\n");
#ifdef CONFIG_EDAC_DEBUG
edac_debugfs_remove_recursive(mci->debugfs);
#endif
#ifdef CONFIG_EDAC_LEGACY_SYSFS
edac_delete_csrow_objects(mci);
#endif
mci_for_each_dimm(mci, dimm) {
if (dimm->nr_pages == 0)
continue;
edac_dbg(1, "unregistering device %s\n", dev_name(&dimm->dev));
device_unregister(&dimm->dev);
}
}
void edac_unregister_sysfs(struct mem_ctl_info *mci)
{
edac_dbg(1, "unregistering device %s\n", dev_name(&mci->dev));
device_unregister(&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);
}
static const struct device_type mc_attr_type = {
.release = mc_attr_release,
};
/*
* 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->type = &mc_attr_type;
device_initialize(mci_pdev);
dev_set_name(mci_pdev, "mc");
err = device_add(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);
}
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