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linux-sg2042/drivers/edac/edac_mc_sysfs.c

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/*
* 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
*
*/
#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/edac.h>
#include <linux/bug.h>
#include "edac_core.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 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 */
int edac_mc_get_poll_msec(void)
{
return edac_mc_poll_msec;
}
static int edac_set_poll_msec(const char *val, struct kernel_param *kp)
{
long l;
int ret;
if (!val)
return -EINVAL;
ret = strict_strtol(val, 0, &l);
if (ret == -EINVAL || ((int)l != l))
return -EINVAL;
*((int *)kp->arg) = l;
/* notify edac_mc engine to reset the poll period */
edac_mc_reset_delay_period(l);
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_int,
&edac_mc_poll_msec, 0644);
MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
/*
* various constants for Memory Controllers
*/
static const char *mem_types[] = {
[MEM_EMPTY] = "Empty",
[MEM_RESERVED] = "Reserved",
[MEM_UNKNOWN] = "Unknown",
[MEM_FPM] = "FPM",
[MEM_EDO] = "EDO",
[MEM_BEDO] = "BEDO",
[MEM_SDR] = "Unbuffered-SDR",
[MEM_RDR] = "Registered-SDR",
[MEM_DDR] = "Unbuffered-DDR",
[MEM_RDDR] = "Registered-DDR",
[MEM_RMBS] = "RMBS",
[MEM_DDR2] = "Unbuffered-DDR2",
[MEM_FB_DDR2] = "FullyBuffered-DDR2",
[MEM_RDDR2] = "Registered-DDR2",
[MEM_XDR] = "XDR",
[MEM_DDR3] = "Unbuffered-DDR3",
[MEM_RDDR3] = "Registered-DDR3"
};
static const char *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 *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"
};
/* EDAC sysfs CSROW data structures and methods
*/
/* Set of more default csrow<id> attribute show/store functions */
static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data,
int private)
{
return sprintf(data, "%u\n", csrow->ue_count);
}
static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data,
int private)
{
return sprintf(data, "%u\n", csrow->ce_count);
}
static ssize_t csrow_size_show(struct csrow_info *csrow, char *data,
int private)
{
return sprintf(data, "%u\n", PAGES_TO_MiB(csrow->nr_pages));
}
static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data,
int private)
{
return sprintf(data, "%s\n", mem_types[csrow->mtype]);
}
static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data,
int private)
{
return sprintf(data, "%s\n", dev_types[csrow->dtype]);
}
static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data,
int private)
{
return sprintf(data, "%s\n", edac_caps[csrow->edac_mode]);
}
/* show/store functions for DIMM Label attributes */
static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
char *data, int channel)
{
/* if field has not been initialized, there is nothing to send */
if (!csrow->channels[channel].label[0])
return 0;
return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n",
csrow->channels[channel].label);
}
static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
const char *data,
size_t count, int channel)
{
ssize_t max_size = 0;
max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
strncpy(csrow->channels[channel].label, data, max_size);
csrow->channels[channel].label[max_size] = '\0';
return max_size;
}
/* show function for dynamic chX_ce_count attribute */
static ssize_t channel_ce_count_show(struct csrow_info *csrow,
char *data, int channel)
{
return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
}
/* csrow specific attribute structure */
struct csrowdev_attribute {
struct attribute attr;
ssize_t(*show) (struct csrow_info *, char *, int);
ssize_t(*store) (struct csrow_info *, const char *, size_t, int);
int private;
};
#define to_csrow(k) container_of(k, struct csrow_info, kobj)
#define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
/* Set of show/store higher level functions for default csrow attributes */
static ssize_t csrowdev_show(struct kobject *kobj,
struct attribute *attr, char *buffer)
{
struct csrow_info *csrow = to_csrow(kobj);
struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
if (csrowdev_attr->show)
return csrowdev_attr->show(csrow,
buffer, csrowdev_attr->private);
return -EIO;
}
static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
const char *buffer, size_t count)
{
struct csrow_info *csrow = to_csrow(kobj);
struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
if (csrowdev_attr->store)
return csrowdev_attr->store(csrow,
buffer,
count, csrowdev_attr->private);
return -EIO;
}
static const struct sysfs_ops csrowfs_ops = {
.show = csrowdev_show,
.store = csrowdev_store
};
#define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \
static struct csrowdev_attribute attr_##_name = { \
.attr = {.name = __stringify(_name), .mode = _mode }, \
.show = _show, \
.store = _store, \
.private = _private, \
};
/* default cwrow<id>/attribute files */
CSROWDEV_ATTR(size_mb, S_IRUGO, csrow_size_show, NULL, 0);
CSROWDEV_ATTR(dev_type, S_IRUGO, csrow_dev_type_show, NULL, 0);
CSROWDEV_ATTR(mem_type, S_IRUGO, csrow_mem_type_show, NULL, 0);
CSROWDEV_ATTR(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL, 0);
CSROWDEV_ATTR(ue_count, S_IRUGO, csrow_ue_count_show, NULL, 0);
CSROWDEV_ATTR(ce_count, S_IRUGO, csrow_ce_count_show, NULL, 0);
/* default attributes of the CSROW<id> object */
static struct csrowdev_attribute *default_csrow_attr[] = {
&attr_dev_type,
&attr_mem_type,
&attr_edac_mode,
&attr_size_mb,
&attr_ue_count,
&attr_ce_count,
NULL,
};
/* possible dynamic channel DIMM Label attribute files */
CSROWDEV_ATTR(ch0_dimm_label, S_IRUGO | S_IWUSR,
channel_dimm_label_show, channel_dimm_label_store, 0);
CSROWDEV_ATTR(ch1_dimm_label, S_IRUGO | S_IWUSR,
channel_dimm_label_show, channel_dimm_label_store, 1);
CSROWDEV_ATTR(ch2_dimm_label, S_IRUGO | S_IWUSR,
channel_dimm_label_show, channel_dimm_label_store, 2);
CSROWDEV_ATTR(ch3_dimm_label, S_IRUGO | S_IWUSR,
channel_dimm_label_show, channel_dimm_label_store, 3);
CSROWDEV_ATTR(ch4_dimm_label, S_IRUGO | S_IWUSR,
channel_dimm_label_show, channel_dimm_label_store, 4);
CSROWDEV_ATTR(ch5_dimm_label, S_IRUGO | S_IWUSR,
channel_dimm_label_show, channel_dimm_label_store, 5);
/* Total possible dynamic DIMM Label attribute file table */
static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
&attr_ch0_dimm_label,
&attr_ch1_dimm_label,
&attr_ch2_dimm_label,
&attr_ch3_dimm_label,
&attr_ch4_dimm_label,
&attr_ch5_dimm_label
};
/* possible dynamic channel ce_count attribute files */
CSROWDEV_ATTR(ch0_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 0);
CSROWDEV_ATTR(ch1_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 1);
CSROWDEV_ATTR(ch2_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 2);
CSROWDEV_ATTR(ch3_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 3);
CSROWDEV_ATTR(ch4_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 4);
CSROWDEV_ATTR(ch5_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 5);
/* Total possible dynamic ce_count attribute file table */
static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
&attr_ch0_ce_count,
&attr_ch1_ce_count,
&attr_ch2_ce_count,
&attr_ch3_ce_count,
&attr_ch4_ce_count,
&attr_ch5_ce_count
};
#define EDAC_NR_CHANNELS 6
/* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */
static int edac_create_channel_files(struct kobject *kobj, int chan)
{
int err = -ENODEV;
if (chan >= EDAC_NR_CHANNELS)
return err;
/* create the DIMM label attribute file */
err = sysfs_create_file(kobj,
(struct attribute *)
dynamic_csrow_dimm_attr[chan]);
if (!err) {
/* create the CE Count attribute file */
err = sysfs_create_file(kobj,
(struct attribute *)
dynamic_csrow_ce_count_attr[chan]);
} else {
debugf1("%s() dimm labels and ce_count files created",
__func__);
}
return err;
}
/* No memory to release for this kobj */
static void edac_csrow_instance_release(struct kobject *kobj)
{
struct mem_ctl_info *mci;
struct csrow_info *cs;
debugf1("%s()\n", __func__);
cs = container_of(kobj, struct csrow_info, kobj);
mci = cs->mci;
kobject_put(&mci->edac_mci_kobj);
}
/* the kobj_type instance for a CSROW */
static struct kobj_type ktype_csrow = {
.release = edac_csrow_instance_release,
.sysfs_ops = &csrowfs_ops,
.default_attrs = (struct attribute **)default_csrow_attr,
};
/* 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)
{
struct kobject *kobj_mci = &mci->edac_mci_kobj;
struct kobject *kobj;
int chan;
int err;
/* generate ..../edac/mc/mc<id>/csrow<index> */
memset(&csrow->kobj, 0, sizeof(csrow->kobj));
csrow->mci = mci; /* include container up link */
/* bump the mci instance's kobject's ref count */
kobj = kobject_get(&mci->edac_mci_kobj);
if (!kobj) {
err = -ENODEV;
goto err_out;
}
/* Instanstiate the csrow object */
err = kobject_init_and_add(&csrow->kobj, &ktype_csrow, kobj_mci,
"csrow%d", index);
if (err)
goto err_release_top_kobj;
/* At this point, to release a csrow kobj, one must
* call the kobject_put and allow that tear down
* to work the releasing
*/
/* Create the dyanmic attribute files on this csrow,
* namely, the DIMM labels and the channel ce_count
*/
for (chan = 0; chan < csrow->nr_channels; chan++) {
err = edac_create_channel_files(&csrow->kobj, chan);
if (err) {
/* special case the unregister here */
kobject_put(&csrow->kobj);
goto err_out;
}
}
kobject_uevent(&csrow->kobj, KOBJ_ADD);
return 0;
/* error unwind stack */
err_release_top_kobj:
kobject_put(&mci->edac_mci_kobj);
err_out:
return err;
}
/* default sysfs methods and data structures for the main MCI kobject */
static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
const char *data, size_t count)
{
int row, chan;
mci->ue_noinfo_count = 0;
mci->ce_noinfo_count = 0;
mci->ue_count = 0;
mci->ce_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->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 mem_ctl_info *mci,
const char *data, size_t count)
{
unsigned long bandwidth = 0;
int new_bw = 0;
if (!mci->set_sdram_scrub_rate)
return -EINVAL;
if (strict_strtoul(data, 10, &bandwidth) < 0)
return -EINVAL;
new_bw = mci->set_sdram_scrub_rate(mci, bandwidth);
if (new_bw >= 0) {
edac_printk(KERN_DEBUG, EDAC_MC, "Scrub rate set to %d\n", new_bw);
return count;
}
edac_printk(KERN_DEBUG, EDAC_MC, "Error setting scrub rate to: %lu\n", bandwidth);
return -EINVAL;
}
/*
* ->get_sdram_scrub_rate() return value semantics same as above.
*/
static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data)
{
int bandwidth = 0;
if (!mci->get_sdram_scrub_rate)
return -EINVAL;
bandwidth = mci->get_sdram_scrub_rate(mci);
if (bandwidth < 0) {
edac_printk(KERN_DEBUG, EDAC_MC, "Error reading scrub rate\n");
return bandwidth;
}
edac_printk(KERN_DEBUG, EDAC_MC, "Read scrub rate: %d\n", bandwidth);
return sprintf(data, "%d\n", bandwidth);
}
/* default attribute files for the MCI object */
static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
{
return sprintf(data, "%d\n", mci->ue_count);
}
static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
{
return sprintf(data, "%d\n", mci->ce_count);
}
static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
{
return sprintf(data, "%d\n", mci->ce_noinfo_count);
}
static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
{
return sprintf(data, "%d\n", mci->ue_noinfo_count);
}
static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data)
{
return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
}
static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
{
return sprintf(data, "%s\n", mci->ctl_name);
}
static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data)
{
int total_pages, csrow_idx;
for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows;
csrow_idx++) {
struct csrow_info *csrow = &mci->csrows[csrow_idx];
if (!csrow->nr_pages)
continue;
total_pages += csrow->nr_pages;
}
return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
}
#define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
#define to_mcidev_attr(a) container_of(a,struct mcidev_sysfs_attribute,attr)
/* MCI show/store functions for top most object */
static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
char *buffer)
{
struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
if (mcidev_attr->show)
return mcidev_attr->show(mem_ctl_info, buffer);
return -EIO;
}
static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr,
const char *buffer, size_t count)
{
struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
if (mcidev_attr->store)
return mcidev_attr->store(mem_ctl_info, buffer, count);
return -EIO;
}
/* Intermediate show/store table */
static const struct sysfs_ops mci_ops = {
.show = mcidev_show,
.store = mcidev_store
};
#define MCIDEV_ATTR(_name,_mode,_show,_store) \
static struct mcidev_sysfs_attribute mci_attr_##_name = { \
.attr = {.name = __stringify(_name), .mode = _mode }, \
.show = _show, \
.store = _store, \
};
/* default Control file */
MCIDEV_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
/* default Attribute files */
MCIDEV_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
MCIDEV_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
MCIDEV_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
MCIDEV_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
MCIDEV_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
MCIDEV_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
MCIDEV_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
/* memory scrubber attribute file */
MCIDEV_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show,
mci_sdram_scrub_rate_store);
static struct mcidev_sysfs_attribute *mci_attr[] = {
&mci_attr_reset_counters,
&mci_attr_mc_name,
&mci_attr_size_mb,
&mci_attr_seconds_since_reset,
&mci_attr_ue_noinfo_count,
&mci_attr_ce_noinfo_count,
&mci_attr_ue_count,
&mci_attr_ce_count,
&mci_attr_sdram_scrub_rate,
NULL
};
/*
* Release of a MC controlling instance
*
* each MC control instance has the following resources upon entry:
* a) a ref count on the top memctl kobj
* b) a ref count on this module
*
* this function must decrement those ref counts and then
* issue a free on the instance's memory
*/
static void edac_mci_control_release(struct kobject *kobj)
{
struct mem_ctl_info *mci;
mci = to_mci(kobj);
debugf0("%s() mci instance idx=%d releasing\n", __func__, mci->mc_idx);
/* decrement the module ref count */
module_put(mci->owner);
}
static struct kobj_type ktype_mci = {
.release = edac_mci_control_release,
.sysfs_ops = &mci_ops,
.default_attrs = (struct attribute **)mci_attr,
};
/* EDAC memory controller sysfs kset:
* /sys/devices/system/edac/mc
*/
static struct kset *mc_kset;
/*
* edac_mc_register_sysfs_main_kobj
*
* setups and registers the main kobject for each mci
*/
int edac_mc_register_sysfs_main_kobj(struct mem_ctl_info *mci)
{
struct kobject *kobj_mci;
int err;
debugf1("%s()\n", __func__);
kobj_mci = &mci->edac_mci_kobj;
/* Init the mci's kobject */
memset(kobj_mci, 0, sizeof(*kobj_mci));
/* Record which module 'owns' this control structure
* and bump the ref count of the module
*/
mci->owner = THIS_MODULE;
/* bump ref count on this module */
if (!try_module_get(mci->owner)) {
err = -ENODEV;
goto fail_out;
}
/* this instance become part of the mc_kset */
kobj_mci->kset = mc_kset;
/* register the mc<id> kobject to the mc_kset */
err = kobject_init_and_add(kobj_mci, &ktype_mci, NULL,
"mc%d", mci->mc_idx);
if (err) {
debugf1("%s()Failed to register '.../edac/mc%d'\n",
__func__, mci->mc_idx);
goto kobj_reg_fail;
}
kobject_uevent(kobj_mci, KOBJ_ADD);
/* At this point, to 'free' the control struct,
* edac_mc_unregister_sysfs_main_kobj() must be used
*/
debugf1("%s() Registered '.../edac/mc%d' kobject\n",
__func__, mci->mc_idx);
return 0;
/* Error exit stack */
kobj_reg_fail:
module_put(mci->owner);
fail_out:
return err;
}
/*
* edac_mc_register_sysfs_main_kobj
*
* tears down and the main mci kobject from the mc_kset
*/
void edac_mc_unregister_sysfs_main_kobj(struct mem_ctl_info *mci)
{
debugf1("%s()\n", __func__);
/* delete the kobj from the mc_kset */
kobject_put(&mci->edac_mci_kobj);
}
#define EDAC_DEVICE_SYMLINK "device"
#define grp_to_mci(k) (container_of(k, struct mcidev_sysfs_group_kobj, kobj)->mci)
/* MCI show/store functions for top most object */
static ssize_t inst_grp_show(struct kobject *kobj, struct attribute *attr,
char *buffer)
{
struct mem_ctl_info *mem_ctl_info = grp_to_mci(kobj);
struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
if (mcidev_attr->show)
return mcidev_attr->show(mem_ctl_info, buffer);
return -EIO;
}
static ssize_t inst_grp_store(struct kobject *kobj, struct attribute *attr,
const char *buffer, size_t count)
{
struct mem_ctl_info *mem_ctl_info = grp_to_mci(kobj);
struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
if (mcidev_attr->store)
return mcidev_attr->store(mem_ctl_info, buffer, count);
return -EIO;
}
/* No memory to release for this kobj */
static void edac_inst_grp_release(struct kobject *kobj)
{
struct mcidev_sysfs_group_kobj *grp;
struct mem_ctl_info *mci;
debugf1("%s()\n", __func__);
grp = container_of(kobj, struct mcidev_sysfs_group_kobj, kobj);
mci = grp->mci;
}
/* Intermediate show/store table */
static struct sysfs_ops inst_grp_ops = {
.show = inst_grp_show,
.store = inst_grp_store
};
/* the kobj_type instance for a instance group */
static struct kobj_type ktype_inst_grp = {
.release = edac_inst_grp_release,
.sysfs_ops = &inst_grp_ops,
};
/*
* edac_create_mci_instance_attributes
* create MC driver specific attributes bellow an specified kobj
* This routine calls itself recursively, in order to create an entire
* object tree.
*/
static int edac_create_mci_instance_attributes(struct mem_ctl_info *mci,
const struct mcidev_sysfs_attribute *sysfs_attrib,
struct kobject *kobj)
{
int err;
debugf4("%s()\n", __func__);
while (sysfs_attrib) {
debugf4("%s() sysfs_attrib = %p\n",__func__, sysfs_attrib);
if (sysfs_attrib->grp) {
struct mcidev_sysfs_group_kobj *grp_kobj;
grp_kobj = kzalloc(sizeof(*grp_kobj), GFP_KERNEL);
if (!grp_kobj)
return -ENOMEM;
grp_kobj->grp = sysfs_attrib->grp;
grp_kobj->mci = mci;
list_add_tail(&grp_kobj->list, &mci->grp_kobj_list);
debugf0("%s() grp %s, mci %p\n", __func__,
sysfs_attrib->grp->name, mci);
err = kobject_init_and_add(&grp_kobj->kobj,
&ktype_inst_grp,
&mci->edac_mci_kobj,
sysfs_attrib->grp->name);
if (err < 0) {
printk(KERN_ERR "kobject_init_and_add failed: %d\n", err);
return err;
}
err = edac_create_mci_instance_attributes(mci,
grp_kobj->grp->mcidev_attr,
&grp_kobj->kobj);
if (err < 0)
return err;
} else if (sysfs_attrib->attr.name) {
debugf4("%s() file %s\n", __func__,
sysfs_attrib->attr.name);
err = sysfs_create_file(kobj, &sysfs_attrib->attr);
if (err < 0) {
printk(KERN_ERR "sysfs_create_file failed: %d\n", err);
return err;
}
} else
break;
sysfs_attrib++;
}
return 0;
}
/*
* edac_remove_mci_instance_attributes
* remove MC driver specific attributes at the topmost level
* directory of this mci instance.
*/
static void edac_remove_mci_instance_attributes(struct mem_ctl_info *mci,
const struct mcidev_sysfs_attribute *sysfs_attrib,
struct kobject *kobj, int count)
{
struct mcidev_sysfs_group_kobj *grp_kobj, *tmp;
debugf1("%s()\n", __func__);
/*
* loop if there are attributes and until we hit a NULL entry
* Remove first all the attributes
*/
while (sysfs_attrib) {
debugf4("%s() sysfs_attrib = %p\n",__func__, sysfs_attrib);
if (sysfs_attrib->grp) {
debugf4("%s() seeking for group %s\n",
__func__, sysfs_attrib->grp->name);
list_for_each_entry(grp_kobj,
&mci->grp_kobj_list, list) {
debugf4("%s() grp_kobj->grp = %p\n",__func__, grp_kobj->grp);
if (grp_kobj->grp == sysfs_attrib->grp) {
edac_remove_mci_instance_attributes(mci,
grp_kobj->grp->mcidev_attr,
&grp_kobj->kobj, count + 1);
debugf4("%s() group %s\n", __func__,
sysfs_attrib->grp->name);
kobject_put(&grp_kobj->kobj);
}
}
debugf4("%s() end of seeking for group %s\n",
__func__, sysfs_attrib->grp->name);
} else if (sysfs_attrib->attr.name) {
debugf4("%s() file %s\n", __func__,
sysfs_attrib->attr.name);
sysfs_remove_file(kobj, &sysfs_attrib->attr);
} else
break;
sysfs_attrib++;
}
/* Remove the group objects */
if (count)
return;
list_for_each_entry_safe(grp_kobj, tmp,
&mci->grp_kobj_list, list) {
list_del(&grp_kobj->list);
kfree(grp_kobj);
}
}
/*
* 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)
{
int i;
int err;
struct csrow_info *csrow;
struct kobject *kobj_mci = &mci->edac_mci_kobj;
debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
INIT_LIST_HEAD(&mci->grp_kobj_list);
/* create a symlink for the device */
err = sysfs_create_link(kobj_mci, &mci->dev->kobj,
EDAC_DEVICE_SYMLINK);
if (err) {
debugf1("%s() failure to create symlink\n", __func__);
goto fail0;
}
/* If the low level driver desires some attributes,
* then create them now for the driver.
*/
if (mci->mc_driver_sysfs_attributes) {
err = edac_create_mci_instance_attributes(mci,
mci->mc_driver_sysfs_attributes,
&mci->edac_mci_kobj);
if (err) {
debugf1("%s() failure to create mci attributes\n",
__func__);
goto fail0;
}
}
/* Make directories for each CSROW object under the mc<id> kobject
*/
for (i = 0; i < mci->nr_csrows; i++) {
csrow = &mci->csrows[i];
/* Only expose populated CSROWs */
if (csrow->nr_pages > 0) {
err = edac_create_csrow_object(mci, csrow, i);
if (err) {
debugf1("%s() failure: create csrow %d obj\n",
__func__, i);
goto fail1;
}
}
}
return 0;
/* CSROW error: backout what has already been registered, */
fail1:
for (i--; i >= 0; i--) {
if (csrow->nr_pages > 0) {
kobject_put(&mci->csrows[i].kobj);
}
}
/* remove the mci instance's attributes, if any */
edac_remove_mci_instance_attributes(mci,
mci->mc_driver_sysfs_attributes, &mci->edac_mci_kobj, 0);
/* remove the symlink */
sysfs_remove_link(kobj_mci, EDAC_DEVICE_SYMLINK);
fail0:
return err;
}
/*
* remove a Memory Controller instance
*/
void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
{
int i;
debugf0("%s()\n", __func__);
/* remove all csrow kobjects */
debugf4("%s() unregister this mci kobj\n", __func__);
for (i = 0; i < mci->nr_csrows; i++) {
if (mci->csrows[i].nr_pages > 0) {
debugf0("%s() unreg csrow-%d\n", __func__, i);
kobject_put(&mci->csrows[i].kobj);
}
}
/* remove this mci instance's attribtes */
if (mci->mc_driver_sysfs_attributes) {
debugf4("%s() unregister mci private attributes\n", __func__);
edac_remove_mci_instance_attributes(mci,
mci->mc_driver_sysfs_attributes,
&mci->edac_mci_kobj, 0);
}
/* remove the symlink */
debugf4("%s() remove_link\n", __func__);
sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
/* unregister this instance's kobject */
debugf4("%s() remove_mci_instance\n", __func__);
kobject_put(&mci->edac_mci_kobj);
}
/*
* edac_setup_sysfs_mc_kset(void)
*
* Initialize the mc_kset for the 'mc' entry
* This requires creating the top 'mc' directory with a kset
* and its controls/attributes.
*
* To this 'mc' kset, instance 'mci' will be grouped as children.
*
* Return: 0 SUCCESS
* !0 FAILURE error code
*/
int edac_sysfs_setup_mc_kset(void)
{
int err = -EINVAL;
struct sysdev_class *edac_class;
debugf1("%s()\n", __func__);
/* get the /sys/devices/system/edac class reference */
edac_class = edac_get_sysfs_class();
if (edac_class == NULL) {
debugf1("%s() no edac_class error=%d\n", __func__, err);
goto fail_out;
}
/* Init the MC's kobject */
mc_kset = kset_create_and_add("mc", NULL, &edac_class->kset.kobj);
if (!mc_kset) {
err = -ENOMEM;
debugf1("%s() Failed to register '.../edac/mc'\n", __func__);
goto fail_kset;
}
debugf1("%s() Registered '.../edac/mc' kobject\n", __func__);
return 0;
fail_kset:
edac_put_sysfs_class();
fail_out:
return err;
}
/*
* edac_sysfs_teardown_mc_kset
*
* deconstruct the mc_ket for memory controllers
*/
void edac_sysfs_teardown_mc_kset(void)
{
kset_unregister(mc_kset);
edac_put_sysfs_class();
}
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