drivers/edac/mem_repair.c

Source file repositories/reference/linux-study-clean/drivers/edac/mem_repair.c

File Facts

System
Linux kernel
Corpus path
drivers/edac/mem_repair.c
Extension
.c
Size
9652 bytes
Lines
358
Domain
Driver Families
Bucket
drivers/edac
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

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[MR_MAX_ATTRS];
	struct attribute *mem_repair_attrs[MR_MAX_ATTRS + 1];
	struct attribute_group group;
};

const char * const edac_repair_type[] = {
	[EDAC_REPAIR_PPR] = "ppr",
	[EDAC_REPAIR_CACHELINE_SPARING] = "cacheline-sparing",
	[EDAC_REPAIR_ROW_SPARING] = "row-sparing",
	[EDAC_REPAIR_BANK_SPARING] = "bank-sparing",
	[EDAC_REPAIR_RANK_SPARING] = "rank-sparing",
};
EXPORT_SYMBOL_GPL(edac_repair_type);

#define TO_MR_DEV_ATTR(_dev_attr)      \
	container_of(_dev_attr, struct edac_mem_repair_dev_attr, dev_attr)

#define MR_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_MR_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);					\
}

MR_ATTR_SHOW(repair_type, get_repair_type, const char *, "%s\n")
MR_ATTR_SHOW(persist_mode, get_persist_mode, bool, "%u\n")
MR_ATTR_SHOW(repair_safe_when_in_use, get_repair_safe_when_in_use, bool, "%u\n")
MR_ATTR_SHOW(hpa, get_hpa, u64, "0x%llx\n")
MR_ATTR_SHOW(min_hpa, get_min_hpa, u64, "0x%llx\n")
MR_ATTR_SHOW(max_hpa, get_max_hpa, u64, "0x%llx\n")
MR_ATTR_SHOW(dpa, get_dpa, u64, "0x%llx\n")
MR_ATTR_SHOW(min_dpa, get_min_dpa, u64, "0x%llx\n")
MR_ATTR_SHOW(max_dpa, get_max_dpa, u64, "0x%llx\n")
MR_ATTR_SHOW(nibble_mask, get_nibble_mask, u32, "0x%x\n")
MR_ATTR_SHOW(bank_group, get_bank_group, u32, "%u\n")
MR_ATTR_SHOW(bank, get_bank, u32, "%u\n")
MR_ATTR_SHOW(rank, get_rank, u32, "%u\n")
MR_ATTR_SHOW(row, get_row, u32, "0x%x\n")
MR_ATTR_SHOW(column, get_column, u32, "%u\n")
MR_ATTR_SHOW(channel, get_channel, u32, "%u\n")
MR_ATTR_SHOW(sub_channel, get_sub_channel, u32, "%u\n")

#define MR_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_MR_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;								\
}

MR_ATTR_STORE(persist_mode, set_persist_mode, unsigned long, kstrtoul)
MR_ATTR_STORE(hpa, set_hpa, u64, kstrtou64)
MR_ATTR_STORE(dpa, set_dpa, u64, kstrtou64)
MR_ATTR_STORE(nibble_mask, set_nibble_mask, unsigned long, kstrtoul)
MR_ATTR_STORE(bank_group, set_bank_group, unsigned long, kstrtoul)

Annotation

Implementation Notes