mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
libnvdimm, nfit: export an 'ecc_unit_size' sysfs attribute
When the nfit driver initializes it runs an ARS (Address Range Scrub) operation across every pmem range. Part of that process involves determining the ARS capabilities of a given address range. One of the capabilities that is reported is the 'Clear Uncorrectable Error Range Length Unit Size' (see: ACPI 6.2 section 9.20.7.4 Function Index 1 - Query ARS Capabilities). This property is of interest to userspace software as it indicates the boundary at which the NVDIMM may need to perform read-modify-write cycles to maintain ECC blocks. Cc: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
parent
ed36b4dba5
commit
a15797f4be
1 changed files with 11 additions and 0 deletions
|
@ -1674,8 +1674,19 @@ static ssize_t range_index_show(struct device *dev,
|
|||
}
|
||||
static DEVICE_ATTR_RO(range_index);
|
||||
|
||||
static ssize_t ecc_unit_size_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct nd_region *nd_region = to_nd_region(dev);
|
||||
struct nfit_spa *nfit_spa = nd_region_provider_data(nd_region);
|
||||
|
||||
return sprintf(buf, "%d\n", nfit_spa->clear_err_unit);
|
||||
}
|
||||
static DEVICE_ATTR_RO(ecc_unit_size);
|
||||
|
||||
static struct attribute *acpi_nfit_region_attributes[] = {
|
||||
&dev_attr_range_index.attr,
|
||||
&dev_attr_ecc_unit_size.attr,
|
||||
NULL,
|
||||
};
|
||||
|
||||
|
|
Loading…
Reference in a new issue