new file mode 100644
@@ -0,0 +1,152 @@
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ The sysfs EDAC bus devices /<dev-name>/mem_repairX subdirectory
+ belongs to the memory media repair features control, such as
+ PPR (Post Package Repair), memory sparing etc, where<dev-name>
+ directory corresponds to a device registered with the EDAC
+ device driver for the memory repair features.
+ /mem_repairX belongs to either sPPR (Soft PPR) or hPPR (Hard PPR)
+ feature of PPR feature, hard or soft memory sparing etc. The memory
+ sparing is a repair function that replaces a portion of memory
+ (spared memory) with a portion of functional memory. The memory
+ sparing has cacheline/row/bank/rank sparing granularities.
+ The sysfs memory repair attr nodes would be only present if a
+ memory repair feature is supported.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/repair_type
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (RO) Type of the repair instance. For eg. sPPR, hPPR, cacheline/
+ row/bank/rank memory sparing etc.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/persist_mode_avail
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (RO) Persist repair modes supported in the device.
+ For e.g. Hard PPR(hPPR)/hard memory sparing for a permanent memory
+ repair, Soft PPR(sPPR)/soft memory sparing for a temporary repair.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/persist_mode
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (RW) Current persist repair mode.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/dpa_support
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (RO) True if supports DPA for repair(PPR, memory sparing, ...)
+ maintenance operation.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/repair_safe_when_in_use
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (RO) True if memory media is accessible and data is retained
+ during the memory repair operation.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/hpa
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (WO) Set HPA (Host Physical Address) for memory repair.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/dpa
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (WO) Set DPA (Device Physical Address) for memory repair.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/nibble_mask
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (WO) Set nibble mask for memory repair.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/bank_group
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (WO) Set memory bank group for repair.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/bank
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (WO) Set memory bank for memory repair.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/rank
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (WO) Set memory rank for repair.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/row
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (WO) Set row for memory repair.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/column
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (WO) Set column for memory repair.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/channel
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (WO) Set channel for memory repair.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/sub_channel
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (WO) Set sub channel for memory repair.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/query
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (WO) Query whether the repair operation is supported for the
+ memory attributes set. Return failure if resources are
+ not available to perform repair.
+
+What: /sys/bus/edac/devices/<dev-name>/mem_repairX/repair
+Date: Oct 2024
+KernelVersion: 6.12
+Contact: linux-edac@vger.kernel.org
+Description:
+ (WO) Start the memory repair operation for the memory attributes
+ set. Return failure if resources are not available to
+ perform repair.
+ In some states of system configuration (e.g. before address
+ decoders have been configured), memory devices (e.g. CXL)
+ may not have an active mapping in the main host address
+ physical address map. As such, the memory to repair must be
+ identified by a device specific physical addressing scheme
+ using a DPA. The DPA to use will be presented in related
+ error records.
@@ -10,7 +10,7 @@ obj-$(CONFIG_EDAC) := edac_core.o
edac_core-y := edac_mc.o edac_device.o edac_mc_sysfs.o
edac_core-y += edac_module.o edac_device_sysfs.o wq.o
-edac_core-y += scrub.o ecs.o
+edac_core-y += scrub.o ecs.o mem_repair.o
edac_core-$(CONFIG_EDAC_DEBUG) += debugfs.o
@@ -576,6 +576,7 @@ static void edac_dev_release(struct device *dev)
{
struct edac_dev_feat_ctx *ctx = container_of(dev, struct edac_dev_feat_ctx, dev);
+ kfree(ctx->mem_repair);
kfree(ctx->scrub);
kfree(ctx->dev.groups);
kfree(ctx);
@@ -614,6 +615,7 @@ int edac_dev_register(struct device *parent, char *name,
struct edac_dev_data *dev_data;
struct edac_dev_feat_ctx *ctx;
int scrub_cnt = 0, scrub_inst = 0;
+ int mem_repair_cnt = 0, mem_repair_inst = 0;
int attr_gcnt = 0;
int ret, feat;
@@ -627,6 +629,10 @@ int edac_dev_register(struct device *parent, char *name,
attr_gcnt++;
scrub_cnt++;
break;
+ case RAS_FEAT_MEM_REPAIR:
+ attr_gcnt++;
+ mem_repair_cnt++;
+ break;
case RAS_FEAT_ECS:
attr_gcnt += ras_features[feat].ecs_info.num_media_frus;
break;
@@ -656,6 +662,14 @@ int edac_dev_register(struct device *parent, char *name,
}
}
+ if (mem_repair_cnt) {
+ ctx->mem_repair = kcalloc(mem_repair_cnt, sizeof(*ctx->mem_repair), GFP_KERNEL);
+ if (!ctx->mem_repair) {
+ ret = -ENOMEM;
+ goto groups_free;
+ }
+ }
+
attr_gcnt = 0;
for (feat = 0; feat < num_features; feat++, ras_features++) {
switch (ras_features->ft_type) {
@@ -687,6 +701,22 @@ int edac_dev_register(struct device *parent, char *name,
goto data_mem_free;
attr_gcnt += ras_features->ecs_info.num_media_frus;
break;
+ case RAS_FEAT_MEM_REPAIR:
+ if (!ras_features->mem_repair_ops)
+ continue;
+ if (mem_repair_inst != ras_features->instance)
+ goto data_mem_free;
+ dev_data = &ctx->mem_repair[mem_repair_inst];
+ dev_data->instance = mem_repair_inst;
+ dev_data->mem_repair_ops = ras_features->mem_repair_ops;
+ dev_data->private = ras_features->ctx;
+ ret = edac_mem_repair_get_desc(parent, &ras_attr_groups[attr_gcnt],
+ ras_features->instance);
+ if (ret)
+ goto data_mem_free;
+ mem_repair_inst++;
+ attr_gcnt++;
+ break;
default:
ret = -EINVAL;
goto data_mem_free;
@@ -713,6 +743,7 @@ int edac_dev_register(struct device *parent, char *name,
return devm_add_action_or_reset(parent, edac_dev_unreg, &ctx->dev);
data_mem_free:
+ kfree(ctx->mem_repair);
kfree(ctx->scrub);
groups_free:
kfree(ras_attr_groups);
new file mode 100755
@@ -0,0 +1,317 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Generic EDAC memory repair driver in order to control the memory
+ * device with memory repair features, such as Post Package Repair (PPR),
+ * memory sparing features etc in the system.
+ * The common sysfs memory repair interface abstracts the control of an
+ * arbitrary memory repair functionality to a common set of functions.
+ *
+ * Copyright (c) 2024 HiSilicon Limited.
+ */
+
+#define pr_fmt(fmt) "EDAC MEM REPAIR: " fmt
+
+#include <linux/edac.h>
+
+enum edac_mem_repair_attributes {
+ MEM_REPAIR_TYPE,
+ MEM_REPAIR_PERSIST_MODE_AVAIL,
+ MEM_REPAIR_PERSIST_MODE,
+ MEM_REPAIR_DPA_SUPPORT,
+ MEM_REPAIR_SAFE_IN_USE,
+ MEM_REPAIR_HPA,
+ MEM_REPAIR_DPA,
+ MEM_REPAIR_NIBBLE_MASK,
+ MEM_REPAIR_BANK_GROUP,
+ MEM_REPAIR_BANK,
+ MEM_REPAIR_RANK,
+ MEM_REPAIR_ROW,
+ MEM_REPAIR_COLUMN,
+ MEM_REPAIR_CHANNEL,
+ MEM_REPAIR_SUB_CHANNEL,
+ MEM_REPAIR_QUERY,
+ MEM_DO_REPAIR,
+ MEM_REPAIR_MAX_ATTRS
+};
+
+struct edac_mem_repair_dev_attr {
+ struct device_attribute dev_attr;
+ u8 instance;
+};
+
+struct edac_mem_repair_context {
+ char name[EDAC_FEAT_NAME_LEN];
+ struct edac_mem_repair_dev_attr mem_repair_dev_attr[MEM_REPAIR_MAX_ATTRS];
+ struct attribute *mem_repair_attrs[MEM_REPAIR_MAX_ATTRS + 1];
+ struct attribute_group group;
+};
+
+#define TO_MEM_REPAIR_DEV_ATTR(_dev_attr) \
+ container_of(_dev_attr, struct edac_mem_repair_dev_attr, dev_attr)
+
+#define INIT_MEM_REPAIR_FUNC_VARS(attr) \
+ u8 inst = TO_MEM_REPAIR_DEV_ATTR(attr)->instance; \
+ struct edac_dev_feat_ctx *ctx = dev_get_drvdata(ras_feat_dev); \
+ const struct edac_mem_repair_ops *ops = ctx->mem_repair[inst].mem_repair_ops
+
+#define EDAC_MEM_REPAIR_ATTR_SHOW(attrib, cb, type, format) \
+static ssize_t attrib##_show(struct device *ras_feat_dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ u8 inst = TO_MEM_REPAIR_DEV_ATTR(attr)->instance; \
+ struct edac_dev_feat_ctx *ctx = dev_get_drvdata(ras_feat_dev); \
+ const struct edac_mem_repair_ops *ops = \
+ ctx->mem_repair[inst].mem_repair_ops; \
+ type data; \
+ int ret; \
+ \
+ ret = ops->cb(ras_feat_dev->parent, ctx->mem_repair[inst].private, \
+ &data); \
+ if (ret) \
+ return ret; \
+ \
+ return sysfs_emit(buf, format, data); \
+}
+
+EDAC_MEM_REPAIR_ATTR_SHOW(repair_type, get_repair_type, u32, "%u\n")
+EDAC_MEM_REPAIR_ATTR_SHOW(persist_mode, get_persist_mode, u32, "%u\n")
+EDAC_MEM_REPAIR_ATTR_SHOW(dpa_support, get_dpa_support, u32, "%u\n")
+EDAC_MEM_REPAIR_ATTR_SHOW(repair_safe_when_in_use, get_repair_safe_when_in_use, u32, "%u\n")
+
+#define EDAC_MEM_REPAIR_ATTR_STORE(attrib, cb, type, conv_func) \
+static ssize_t attrib##_store(struct device *ras_feat_dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t len) \
+{ \
+ u8 inst = TO_MEM_REPAIR_DEV_ATTR(attr)->instance; \
+ struct edac_dev_feat_ctx *ctx = dev_get_drvdata(ras_feat_dev); \
+ const struct edac_mem_repair_ops *ops = \
+ ctx->mem_repair[inst].mem_repair_ops; \
+ type data; \
+ int ret; \
+ \
+ ret = conv_func(buf, 0, &data); \
+ if (ret < 0) \
+ return ret; \
+ \
+ ret = ops->cb(ras_feat_dev->parent, ctx->mem_repair[inst].private, \
+ data); \
+ if (ret) \
+ return ret; \
+ \
+ return len; \
+}
+
+EDAC_MEM_REPAIR_ATTR_STORE(persist_mode, set_persist_mode, unsigned long, kstrtoul)
+EDAC_MEM_REPAIR_ATTR_STORE(hpa, set_hpa, u64, kstrtou64)
+EDAC_MEM_REPAIR_ATTR_STORE(dpa, set_dpa, u64, kstrtou64)
+EDAC_MEM_REPAIR_ATTR_STORE(nibble_mask, set_nibble_mask, u64, kstrtou64)
+EDAC_MEM_REPAIR_ATTR_STORE(bank_group, set_bank_group, unsigned long, kstrtoul)
+EDAC_MEM_REPAIR_ATTR_STORE(bank, set_bank, unsigned long, kstrtoul)
+EDAC_MEM_REPAIR_ATTR_STORE(rank, set_rank, unsigned long, kstrtoul)
+EDAC_MEM_REPAIR_ATTR_STORE(row, set_row, u64, kstrtou64)
+EDAC_MEM_REPAIR_ATTR_STORE(column, set_column, unsigned long, kstrtoul)
+EDAC_MEM_REPAIR_ATTR_STORE(channel, set_channel, unsigned long, kstrtoul)
+EDAC_MEM_REPAIR_ATTR_STORE(sub_channel, set_sub_channel, unsigned long, kstrtoul)
+
+static ssize_t persist_mode_avail_show(struct device *ras_feat_dev,
+ struct device_attribute *attr, char *buf)
+{
+ INIT_MEM_REPAIR_FUNC_VARS(attr);
+
+ return ops->get_persist_mode_avail(ras_feat_dev->parent,
+ ctx->mem_repair[inst].private, buf);
+}
+
+static ssize_t query_store(struct device *ras_feat_dev, struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ int ret;
+
+ INIT_MEM_REPAIR_FUNC_VARS(attr);
+
+ ret = ops->do_query(ras_feat_dev->parent, ctx->mem_repair[inst].private);
+ if (ret)
+ return ret;
+
+ return len;
+}
+
+static ssize_t repair_store(struct device *ras_feat_dev, struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ int ret;
+
+ INIT_MEM_REPAIR_FUNC_VARS(attr);
+
+ ret = ops->do_repair(ras_feat_dev->parent, ctx->mem_repair[inst].private);
+ if (ret)
+ return ret;
+
+ return len;
+}
+
+static umode_t mem_repair_attr_visible(struct kobject *kobj, struct attribute *a, int attr_id)
+{
+ struct device *ras_feat_dev = kobj_to_dev(kobj);
+ struct device_attribute *dev_attr = container_of(a, struct device_attribute, attr);
+
+ INIT_MEM_REPAIR_FUNC_VARS(dev_attr);
+ switch (attr_id) {
+ case MEM_REPAIR_TYPE:
+ if (ops->get_repair_type)
+ return a->mode;
+ break;
+ case MEM_REPAIR_PERSIST_MODE_AVAIL:
+ if (ops->get_persist_mode_avail)
+ return a->mode;
+ break;
+ case MEM_REPAIR_PERSIST_MODE:
+ if (ops->get_persist_mode) {
+ if (ops->set_persist_mode)
+ return a->mode;
+ else
+ return 0444;
+ }
+ break;
+ case MEM_REPAIR_DPA_SUPPORT:
+ if (ops->get_dpa_support)
+ return a->mode;
+ break;
+ case MEM_REPAIR_SAFE_IN_USE:
+ if (ops->get_repair_safe_when_in_use)
+ return a->mode;
+ break;
+ case MEM_REPAIR_HPA:
+ if (ops->set_hpa)
+ return a->mode;
+ break;
+ case MEM_REPAIR_DPA:
+ if (ops->set_dpa)
+ return a->mode;
+ break;
+ case MEM_REPAIR_NIBBLE_MASK:
+ if (ops->set_nibble_mask)
+ return a->mode;
+ break;
+ case MEM_REPAIR_BANK_GROUP:
+ if (ops->set_bank_group)
+ return a->mode;
+ break;
+ case MEM_REPAIR_BANK:
+ if (ops->set_bank)
+ return a->mode;
+ break;
+ case MEM_REPAIR_RANK:
+ if (ops->set_rank)
+ return a->mode;
+ break;
+ case MEM_REPAIR_ROW:
+ if (ops->set_row)
+ return a->mode;
+ break;
+ case MEM_REPAIR_COLUMN:
+ if (ops->set_column)
+ return a->mode;
+ break;
+ case MEM_REPAIR_CHANNEL:
+ if (ops->set_channel)
+ return a->mode;
+ break;
+ case MEM_REPAIR_SUB_CHANNEL:
+ if (ops->set_sub_channel)
+ return a->mode;
+ break;
+ case MEM_REPAIR_QUERY:
+ if (ops->do_query)
+ return a->mode;
+ break;
+ case MEM_DO_REPAIR:
+ if (ops->do_repair)
+ return a->mode;
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+#define EDAC_MEM_REPAIR_ATTR_RO(_name, _instance) \
+ ((struct edac_mem_repair_dev_attr) { .dev_attr = __ATTR_RO(_name), \
+ .instance = _instance })
+
+#define EDAC_MEM_REPAIR_ATTR_WO(_name, _instance) \
+ ((struct edac_mem_repair_dev_attr) { .dev_attr = __ATTR_WO(_name), \
+ .instance = _instance })
+
+#define EDAC_MEM_REPAIR_ATTR_RW(_name, _instance) \
+ ((struct edac_mem_repair_dev_attr) { .dev_attr = __ATTR_RW(_name), \
+ .instance = _instance })
+
+static int mem_repair_create_desc(struct device *dev,
+ const struct attribute_group **attr_groups, u8 instance)
+{
+ struct edac_mem_repair_context *ctx;
+ struct attribute_group *group;
+ int i;
+ struct edac_mem_repair_dev_attr dev_attr[] = {
+ [MEM_REPAIR_TYPE] = EDAC_MEM_REPAIR_ATTR_RO(repair_type, instance),
+ [MEM_REPAIR_PERSIST_MODE_AVAIL] =
+ EDAC_MEM_REPAIR_ATTR_RO(persist_mode_avail, instance),
+ [MEM_REPAIR_PERSIST_MODE] = EDAC_MEM_REPAIR_ATTR_RW(persist_mode, instance),
+ [MEM_REPAIR_DPA_SUPPORT] = EDAC_MEM_REPAIR_ATTR_RO(dpa_support, instance),
+ [MEM_REPAIR_SAFE_IN_USE] =
+ EDAC_MEM_REPAIR_ATTR_RO(repair_safe_when_in_use, instance),
+ [MEM_REPAIR_HPA] = EDAC_MEM_REPAIR_ATTR_WO(hpa, instance),
+ [MEM_REPAIR_DPA] = EDAC_MEM_REPAIR_ATTR_WO(dpa, instance),
+ [MEM_REPAIR_NIBBLE_MASK] = EDAC_MEM_REPAIR_ATTR_WO(nibble_mask, instance),
+ [MEM_REPAIR_BANK_GROUP] = EDAC_MEM_REPAIR_ATTR_WO(bank_group, instance),
+ [MEM_REPAIR_BANK] = EDAC_MEM_REPAIR_ATTR_WO(bank, instance),
+ [MEM_REPAIR_RANK] = EDAC_MEM_REPAIR_ATTR_WO(rank, instance),
+ [MEM_REPAIR_ROW] = EDAC_MEM_REPAIR_ATTR_WO(row, instance),
+ [MEM_REPAIR_COLUMN] = EDAC_MEM_REPAIR_ATTR_WO(column, instance),
+ [MEM_REPAIR_CHANNEL] = EDAC_MEM_REPAIR_ATTR_WO(channel, instance),
+ [MEM_REPAIR_SUB_CHANNEL] = EDAC_MEM_REPAIR_ATTR_WO(sub_channel, instance),
+ [MEM_REPAIR_QUERY] = EDAC_MEM_REPAIR_ATTR_WO(query, instance),
+ [MEM_DO_REPAIR] = EDAC_MEM_REPAIR_ATTR_WO(repair, instance)
+ };
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ for (i = 0; i < MEM_REPAIR_MAX_ATTRS; i++) {
+ memcpy(&ctx->mem_repair_dev_attr[i].dev_attr, &dev_attr[i], sizeof(dev_attr[i]));
+ ctx->mem_repair_attrs[i] = &ctx->mem_repair_dev_attr[i].dev_attr.attr;
+ }
+ sprintf(ctx->name, "%s%d", "mem_repair", instance);
+ group = &ctx->group;
+ group->name = ctx->name;
+ group->attrs = ctx->mem_repair_attrs;
+ group->is_visible = mem_repair_attr_visible;
+
+ attr_groups[0] = group;
+
+ return 0;
+}
+
+/**
+ * edac_mem_repair_get_desc - get EDAC memory repair descriptors
+ * @dev: client device with memory repair feature
+ * @attr_groups: pointer to attribute group container
+ * @instance: device's memory repair instance number.
+ *
+ * Return:
+ * * %0 - Success.
+ * * %-EINVAL - Invalid parameters passed.
+ * * %-ENOMEM - Dynamic memory allocation failed.
+ */
+int edac_mem_repair_get_desc(struct device *dev,
+ const struct attribute_group **attr_groups, u8 instance)
+{
+ if (!dev || !attr_groups)
+ return -EINVAL;
+
+ return mem_repair_create_desc(dev, attr_groups, instance);
+}
@@ -670,6 +670,7 @@ static inline struct dimm_info *edac_get_dimm(struct mem_ctl_info *mci,
enum edac_dev_feat {
RAS_FEAT_SCRUB,
RAS_FEAT_ECS,
+ RAS_FEAT_MEM_REPAIR,
RAS_FEAT_MAX
};
@@ -745,11 +746,75 @@ int edac_ecs_get_desc(struct device *ecs_dev,
const struct attribute_group **attr_groups,
u16 num_media_frus);
+enum edac_mem_repair_type {
+ EDAC_TYPE_SPPR,
+ EDAC_TYPE_HPPR,
+ EDAC_TYPE_CACHELINE_MEM_SPARING,
+ EDAC_TYPE_ROW_MEM_SPARING,
+ EDAC_TYPE_BANK_MEM_SPARING,
+ EDAC_TYPE_RANK_MEM_SPARING,
+};
+
+enum edac_mem_repair_persist_mode {
+ EDAC_MEM_REPAIR_SOFT, /* soft memory repair */
+ EDAC_MEM_REPAIR_HARD, /* hard memory repair */
+};
+
+/**
+ * struct edac_mem_repair_ops - memory repair device operations
+ * (all elements optional)
+ * @get_repair_type: get the memory repair type, listed in enum edac_mem_repair_type.
+ * @get_persist_mode_avail: get the persist modes supported in the device.
+ * @get_persist_mode: get the persist mode of the memory repair instance.
+ * @set_persist_mode: set the persist mode for the memory repair instance.
+ * @get_dpa_support: get dpa support flag.
+ * @get_repair_safe_when_in_use: get whether memory media is accessible and
+ * data is retained during repair operation.
+ * @set_hpa: set HPA for memory repair.
+ * @set_dpa: set DPA for memory repair.
+ * @set_nibble_mask: set nibble mask for memory repair.
+ * @set_bank_group: set bank group for memory repair.
+ * @set_bank: set bank for memory repair.
+ * @set_rank: set rank for memory repair.
+ * @set_row: set row for memory repair.
+ * @set_column: set column for memory repair.
+ * @set_channel: set channel for memory repair.
+ * @set_sub_channel: set sub channel for memory repair.
+ * @do_query: Query memory repair operation for the HPA/DPA/other attrs set
+ * is supported or not.
+ * @do_repair: start memory repair operation for the HPA/DPA/other attrs set.
+ */
+struct edac_mem_repair_ops {
+ int (*get_repair_type)(struct device *dev, void *drv_data, u32 *val);
+ int (*get_persist_mode_avail)(struct device *dev, void *drv_data, char *buf);
+ int (*get_persist_mode)(struct device *dev, void *drv_data, u32 *mode);
+ int (*set_persist_mode)(struct device *dev, void *drv_data, u32 mode);
+ int (*get_dpa_support)(struct device *dev, void *drv_data, u32 *val);
+ int (*get_repair_safe_when_in_use)(struct device *dev, void *drv_data, u32 *val);
+ int (*set_hpa)(struct device *dev, void *drv_data, u64 hpa);
+ int (*set_dpa)(struct device *dev, void *drv_data, u64 dpa);
+ int (*set_nibble_mask)(struct device *dev, void *drv_data, u64 val);
+ int (*set_bank_group)(struct device *dev, void *drv_data, u32 val);
+ int (*set_bank)(struct device *dev, void *drv_data, u32 val);
+ int (*set_rank)(struct device *dev, void *drv_data, u32 val);
+ int (*set_row)(struct device *dev, void *drv_data, u64 val);
+ int (*set_column)(struct device *dev, void *drv_data, u32 val);
+ int (*set_channel)(struct device *dev, void *drv_data, u32 val);
+ int (*set_sub_channel)(struct device *dev, void *drv_data, u32 val);
+ int (*do_query)(struct device *dev, void *drv_data);
+ int (*do_repair)(struct device *dev, void *drv_data);
+};
+
+int edac_mem_repair_get_desc(struct device *dev,
+ const struct attribute_group **attr_groups,
+ u8 instance);
+
/* EDAC device feature information structure */
struct edac_dev_data {
union {
const struct edac_scrub_ops *scrub_ops;
const struct edac_ecs_ops *ecs_ops;
+ const struct edac_mem_repair_ops *mem_repair_ops;
};
u8 instance;
void *private;
@@ -762,6 +827,7 @@ struct edac_dev_feat_ctx {
void *private;
struct edac_dev_data *scrub;
struct edac_dev_data ecs;
+ struct edac_dev_data *mem_repair;
};
struct edac_dev_feature {
@@ -770,6 +836,7 @@ struct edac_dev_feature {
union {
const struct edac_scrub_ops *scrub_ops;
const struct edac_ecs_ops *ecs_ops;
+ const struct edac_mem_repair_ops *mem_repair_ops;
};
void *ctx;
struct edac_ecs_ex_info ecs_info;