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-rw-r--r--drivers/edac/edac_mc_sysfs.c1055
1 files changed, 1055 insertions, 0 deletions
diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c
new file mode 100644
index 000000000..15f63452a
--- /dev/null
+++ b/drivers/edac/edac_mc_sysfs.c
@@ -0,0 +1,1055 @@
+/*
+ * 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 const struct device_type csrow_attr_type = {
+ .groups = csrow_attr_groups,
+};
+
+/*
+ * 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);
+DEVICE_CHANNEL(ch8_dimm_label, S_IRUGO | S_IWUSR,
+ channel_dimm_label_show, channel_dimm_label_store, 8);
+DEVICE_CHANNEL(ch9_dimm_label, S_IRUGO | S_IWUSR,
+ channel_dimm_label_show, channel_dimm_label_store, 9);
+DEVICE_CHANNEL(ch10_dimm_label, S_IRUGO | S_IWUSR,
+ channel_dimm_label_show, channel_dimm_label_store, 10);
+DEVICE_CHANNEL(ch11_dimm_label, S_IRUGO | S_IWUSR,
+ channel_dimm_label_show, channel_dimm_label_store, 11);
+
+/* 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,
+ &dev_attr_legacy_ch8_dimm_label.attr.attr,
+ &dev_attr_legacy_ch9_dimm_label.attr.attr,
+ &dev_attr_legacy_ch10_dimm_label.attr.attr,
+ &dev_attr_legacy_ch11_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);
+DEVICE_CHANNEL(ch8_ce_count, S_IRUGO,
+ channel_ce_count_show, NULL, 8);
+DEVICE_CHANNEL(ch9_ce_count, S_IRUGO,
+ channel_ce_count_show, NULL, 9);
+DEVICE_CHANNEL(ch10_ce_count, S_IRUGO,
+ channel_ce_count_show, NULL, 10);
+DEVICE_CHANNEL(ch11_ce_count, S_IRUGO,
+ channel_ce_count_show, NULL, 11);
+
+/* 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,
+ &dev_attr_legacy_ch8_ce_count.attr.attr,
+ &dev_attr_legacy_ch9_ce_count.attr.attr,
+ &dev_attr_legacy_ch10_ce_count.attr.attr,
+ &dev_attr_legacy_ch11_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 void csrow_release(struct device *dev)
+{
+ /*
+ * Nothing to do, just unregister sysfs here. The mci
+ * device owns the data and will also release it.
+ */
+}
+
+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;
+ csrow->dev.release = csrow_release;
+ 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--) {
+ if (device_is_registered(&mci->csrows[i]->dev))
+ device_unregister(&mci->csrows[i]->dev);
+ }
+
+ return err;
+}
+
+static void edac_delete_csrow_objects(struct mem_ctl_info *mci)
+{
+ int i;
+
+ for (i = 0; i < mci->nr_csrows; i++) {
+ if (device_is_registered(&mci->csrows[i]->dev))
+ 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);
+ 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 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);
+
+ return sprintf(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 sprintf(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 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;
+ 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 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, "%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 sprintf(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 sprintf(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 sprintf(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 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 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;
+ }
+
+#ifdef CONFIG_EDAC_LEGACY_SYSFS
+ err = edac_create_csrow_objects(mci);
+ if (err < 0)
+ goto fail;
+#endif
+
+ 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
+#ifdef CONFIG_EDAC_LEGACY_SYSFS
+ edac_delete_csrow_objects(mci);
+#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);
+}