*/
#include <linux/ctype.h>
+#include <linux/slab.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 = 0;
+static int edac_mc_panic_on_ue;
static int edac_mc_poll_msec = 1000;
/* Getter functions for above */
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_ce, int, 0644);
MODULE_PARM_DESC(edac_mc_log_ce,
"Log correctable error to console: 0=off 1=on");
-module_param(edac_mc_poll_msec, int, 0644);
+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");
/*
[MEM_RMBS] = "RMBS",
[MEM_DDR2] = "Unbuffered-DDR2",
[MEM_FB_DDR2] = "FullyBuffered-DDR2",
- [MEM_RDDR2] = "Registered-DDR2"
+ [MEM_RDDR2] = "Registered-DDR2",
+ [MEM_XDR] = "XDR",
+ [MEM_DDR3] = "Unbuffered-DDR3",
+ [MEM_RDDR3] = "Registered-DDR3"
};
static const char *dev_types[] = {
[EDAC_S16ECD16ED] = "S16ECD16ED"
};
-/* sysfs object:
- * /sys/devices/system/edac/mc
- */
-static struct kobject edac_memctrl_kobj;
-/* We use these to wait for the reference counts on edac_memctrl_kobj and
- * edac_pci_kobj to reach 0.
- */
-static struct completion edac_memctrl_kobj_complete;
-
-/*
- * /sys/devices/system/edac/mc;
- * data structures and methods
- */
-static ssize_t memctrl_int_show(void *ptr, char *buffer)
-{
- int *value = (int *)ptr;
- return sprintf(buffer, "%u\n", *value);
-}
static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count)
{
return count;
}
-struct memctrl_dev_attribute {
- struct attribute attr;
- void *value;
- ssize_t(*show) (void *, char *);
- ssize_t(*store) (void *, const char *, size_t);
-};
-
-/* Set of show/store abstract level functions for memory control object */
-static ssize_t memctrl_dev_show(struct kobject *kobj,
- struct attribute *attr, char *buffer)
-{
- struct memctrl_dev_attribute *memctrl_dev;
- memctrl_dev = (struct memctrl_dev_attribute *)attr;
-
- if (memctrl_dev->show)
- return memctrl_dev->show(memctrl_dev->value, buffer);
-
- return -EIO;
-}
-
-static ssize_t memctrl_dev_store(struct kobject *kobj, struct attribute *attr,
- const char *buffer, size_t count)
-{
- struct memctrl_dev_attribute *memctrl_dev;
- memctrl_dev = (struct memctrl_dev_attribute *)attr;
-
- if (memctrl_dev->store)
- return memctrl_dev->store(memctrl_dev->value, buffer, count);
-
- return -EIO;
-}
-
-static struct sysfs_ops memctrlfs_ops = {
- .show = memctrl_dev_show,
- .store = memctrl_dev_store
-};
-
-#define MEMCTRL_ATTR(_name,_mode,_show,_store) \
-static struct memctrl_dev_attribute attr_##_name = { \
- .attr = {.name = __stringify(_name), .mode = _mode }, \
- .value = &_name, \
- .show = _show, \
- .store = _store, \
-};
-
-#define MEMCTRL_STRING_ATTR(_name,_data,_mode,_show,_store) \
-static struct memctrl_dev_attribute attr_##_name = { \
- .attr = {.name = __stringify(_name), .mode = _mode }, \
- .value = _data, \
- .show = _show, \
- .store = _store, \
-};
-
-/* csrow<id> control files */
-MEMCTRL_ATTR(edac_mc_panic_on_ue,
- S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
-
-MEMCTRL_ATTR(edac_mc_log_ue,
- S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
-
-MEMCTRL_ATTR(edac_mc_log_ce,
- S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
-
-MEMCTRL_ATTR(edac_mc_poll_msec,
- S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
-
-/* Base Attributes of the memory ECC object */
-static struct memctrl_dev_attribute *memctrl_attr[] = {
- &attr_edac_mc_panic_on_ue,
- &attr_edac_mc_log_ue,
- &attr_edac_mc_log_ce,
- &attr_edac_mc_poll_msec,
- NULL,
-};
-
-/* Main MC kobject release() function */
-static void edac_memctrl_master_release(struct kobject *kobj)
-{
- debugf1("%s()\n", __func__);
- complete(&edac_memctrl_kobj_complete);
-}
-
-static struct kobj_type ktype_memctrl = {
- .release = edac_memctrl_master_release,
- .sysfs_ops = &memctrlfs_ops,
- .default_attrs = (struct attribute **)memctrl_attr,
-};
-
-/* Initialize the main sysfs entries for edac:
- * /sys/devices/system/edac
- *
- * and children
- *
- * Return: 0 SUCCESS
- * !0 FAILURE
- */
-int edac_sysfs_memctrl_setup(void)
-{
- int err = 0;
- struct sysdev_class *edac_class;
-
- debugf1("%s()\n", __func__);
-
- /* get the /sys/devices/system/edac class reference */
- edac_class = edac_get_edac_class();
- if (edac_class == NULL) {
- debugf1("%s() no edac_class error=%d\n", __func__, err);
- return err;
- }
-
- /* Init the MC's kobject */
- memset(&edac_memctrl_kobj, 0, sizeof(edac_memctrl_kobj));
- edac_memctrl_kobj.parent = &edac_class->kset.kobj;
- edac_memctrl_kobj.ktype = &ktype_memctrl;
-
- /* generate sysfs "..../edac/mc" */
- err = kobject_set_name(&edac_memctrl_kobj, "mc");
- if (err) {
- debugf1("%s() Failed to set name '.../edac/mc'\n", __func__);
- return err;
- }
-
- /* FIXME: maybe new sysdev_create_subdir() */
- err = kobject_register(&edac_memctrl_kobj);
- if (err) {
- debugf1("%s() Failed to register '.../edac/mc'\n", __func__);
- return err;
- }
-
- debugf1("%s() Registered '.../edac/mc' kobject\n", __func__);
- return 0;
-}
-
-/*
- * MC teardown:
- * the '..../edac/mc' kobject followed by '..../edac' itself
- */
-void edac_sysfs_memctrl_teardown(void)
-{
- debugf0("MC: " __FILE__ ": %s()\n", __func__);
-
- /* Unregister the MC's kobject and wait for reference count to reach 0.
- */
- init_completion(&edac_memctrl_kobj_complete);
- kobject_unregister(&edac_memctrl_kobj);
- wait_for_completion(&edac_memctrl_kobj_complete);
-}
/* EDAC sysfs CSROW data structures and methods
*/
static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
char *data, int channel)
{
- return snprintf(data, EDAC_MC_LABEL_LEN, "%s",
+ /* 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);
}
return -EIO;
}
-static struct sysfs_ops csrowfs_ops = {
+static const struct sysfs_ops csrowfs_ops = {
.show = csrowdev_show,
.store = csrowdev_store
};
/* 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);
- complete(&cs->kobj_complete);
+ mci = cs->mci;
+
+ kobject_put(&mci->edac_mci_kobj);
}
/* the kobj_type instance for a CSROW */
};
/* Create a CSROW object under specifed edac_mc_device */
-static int edac_create_csrow_object(struct kobject *edac_mci_kobj,
- struct csrow_info *csrow, int index)
+static int edac_create_csrow_object(struct mem_ctl_info *mci,
+ struct csrow_info *csrow, int index)
{
- int err = 0;
+ struct kobject *kobj_mci = &mci->edac_mci_kobj;
+ struct kobject *kobj;
int chan;
-
- memset(&csrow->kobj, 0, sizeof(csrow->kobj));
+ int err;
/* generate ..../edac/mc/mc<id>/csrow<index> */
+ memset(&csrow->kobj, 0, sizeof(csrow->kobj));
+ csrow->mci = mci; /* include container up link */
- csrow->kobj.parent = edac_mci_kobj;
- csrow->kobj.ktype = &ktype_csrow;
+ /* bump the mci instance's kobject's ref count */
+ kobj = kobject_get(&mci->edac_mci_kobj);
+ if (!kobj) {
+ err = -ENODEV;
+ goto err_out;
+ }
- /* name this instance of csrow<id> */
- err = kobject_set_name(&csrow->kobj, "csrow%d", index);
+ /* Instanstiate the csrow object */
+ err = kobject_init_and_add(&csrow->kobj, &ktype_csrow, kobj_mci,
+ "csrow%d", index);
if (err)
- goto error_exit;
+ goto err_release_top_kobj;
- /* Instanstiate the csrow object */
- err = kobject_register(&csrow->kobj);
- if (!err) {
- /* 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)
- break;
+ /* 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_exit:
+ /* error unwind stack */
+err_release_top_kobj:
+ kobject_put(&mci->edac_mci_kobj);
+
+err_out:
return err;
}
return -EIO;
}
-static struct sysfs_ops mci_ops = {
+/* Intermediate show/store table */
+static const struct sysfs_ops mci_ops = {
.show = mcidev_show,
.store = mcidev_store
};
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_instance_release(struct kobject *kobj)
+static void edac_mci_control_release(struct kobject *kobj)
{
struct mem_ctl_info *mci;
mci = to_mci(kobj);
- debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
- complete(&mci->kobj_complete);
+
+ debugf0("%s() mci instance idx=%d releasing\n", __func__, mci->mc_idx);
+
+ /* decrement the module ref count */
+ module_put(mci->owner);
+
+ /* free the mci instance memory here */
+ kfree(mci);
}
static struct kobj_type ktype_mci = {
- .release = edac_mci_instance_release,
+ .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)
+{
+ /* delete the kobj from the mc_kset */
+ kobject_put(&mci->edac_mci_kobj);
+}
+
#define EDAC_DEVICE_SYMLINK "device"
/*
- * edac_create_driver_attributes
+ * edac_create_mci_instance_attributes
* create MC driver specific attributes at the topmost level
* directory of this mci instance.
*/
-static int edac_create_driver_attributes(struct mem_ctl_info *mci)
+static int edac_create_mci_instance_attributes(struct mem_ctl_info *mci)
{
int err;
struct mcidev_sysfs_attribute *sysfs_attrib;
*/
sysfs_attrib = mci->mc_driver_sysfs_attributes;
- while (sysfs_attrib->attr.name != NULL) {
+ while (sysfs_attrib && sysfs_attrib->attr.name) {
err = sysfs_create_file(&mci->edac_mci_kobj,
(struct attribute*) sysfs_attrib);
if (err) {
}
/*
+ * 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)
+{
+ struct mcidev_sysfs_attribute *sysfs_attrib;
+
+ /* point to the start of the array and iterate over it
+ * adding each attribute listed to this mci instance's kobject
+ */
+ sysfs_attrib = mci->mc_driver_sysfs_attributes;
+
+ /* loop if there are attributes and until we hit a NULL entry */
+ while (sysfs_attrib && sysfs_attrib->attr.name) {
+ sysfs_remove_file(&mci->edac_mci_kobj,
+ (struct attribute *) sysfs_attrib);
+ sysfs_attrib++;
+ }
+}
+
+
+/*
* Create a new Memory Controller kobject instance,
* mc<id> under the 'mc' directory
*
int i;
int err;
struct csrow_info *csrow;
- struct kobject *edac_mci_kobj = &mci->edac_mci_kobj;
+ struct kobject *kobj_mci = &mci->edac_mci_kobj;
debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
- memset(edac_mci_kobj, 0, sizeof(*edac_mci_kobj));
-
- /* set the name of the mc<id> object */
- err = kobject_set_name(edac_mci_kobj, "mc%d", mci->mc_idx);
- if (err)
- return err;
-
- /* link to our parent the '..../edac/mc' object */
- edac_mci_kobj->parent = &edac_memctrl_kobj;
- edac_mci_kobj->ktype = &ktype_mci;
-
- /* register the mc<id> kobject */
- err = kobject_register(edac_mci_kobj);
- if (err)
- return err;
/* create a symlink for the device */
- err = sysfs_create_link(edac_mci_kobj, &mci->dev->kobj,
+ err = sysfs_create_link(kobj_mci, &mci->dev->kobj,
EDAC_DEVICE_SYMLINK);
- if (err)
+ 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_driver_attributes(mci);
- if (err)
+ err = edac_create_mci_instance_attributes(mci);
+ if (err) {
+ debugf1("%s() failure to create mci attributes\n",
+ __func__);
goto fail0;
+ }
}
- /* Make directories for each CSROW object
- * under the mc<id> kobject
+ /* 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(edac_mci_kobj, csrow, i);
- if (err)
+ err = edac_create_csrow_object(mci, csrow, i);
+ if (err) {
+ debugf1("%s() failure: create csrow %d obj\n",
+ __func__, i);
goto fail1;
+ }
}
}
fail1:
for (i--; i >= 0; i--) {
if (csrow->nr_pages > 0) {
- init_completion(&csrow->kobj_complete);
- kobject_unregister(&mci->csrows[i].kobj);
- wait_for_completion(&csrow->kobj_complete);
+ kobject_put(&mci->csrows[i].kobj);
}
}
+ /* remove the mci instance's attributes, if any */
+ edac_remove_mci_instance_attributes(mci);
+
+ /* remove the symlink */
+ sysfs_remove_link(kobj_mci, EDAC_DEVICE_SYMLINK);
+
fail0:
- init_completion(&mci->kobj_complete);
- kobject_unregister(edac_mci_kobj);
- wait_for_completion(&mci->kobj_complete);
return err;
}
/* remove all csrow kobjects */
for (i = 0; i < mci->nr_csrows; i++) {
if (mci->csrows[i].nr_pages > 0) {
- init_completion(&mci->csrows[i].kobj_complete);
- kobject_unregister(&mci->csrows[i].kobj);
- wait_for_completion(&mci->csrows[i].kobj_complete);
+ debugf0("%s() unreg csrow-%d\n", __func__, i);
+ kobject_put(&mci->csrows[i].kobj);
}
}
+ debugf0("%s() remove_link\n", __func__);
+
+ /* remove the symlink */
sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
- init_completion(&mci->kobj_complete);
- kobject_unregister(&mci->edac_mci_kobj);
- wait_for_completion(&mci->kobj_complete);
+
+ debugf0("%s() remove_mci_instance\n", __func__);
+
+ /* remove this mci instance's attribtes */
+ edac_remove_mci_instance_attributes(mci);
+
+ debugf0("%s() unregister this mci kobj\n", __func__);
+
+ /* unregister this instance's kobject */
+ 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 = 0;
+ struct sysdev_class *edac_class;
+
+ debugf1("%s()\n", __func__);
+
+ /* get the /sys/devices/system/edac class reference */
+ edac_class = edac_get_edac_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_out;
+ }
+
+ debugf1("%s() Registered '.../edac/mc' kobject\n", __func__);
+
+ return 0;
+
+
+ /* error unwind stack */
+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);
+}
+
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff