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d4dd70915e
The "Clear Error Unit" may be smaller than the ECC unit size on some devices. For example, poison may be tracked at 64-byte alignment even though the ECC unit is larger. Unless / until the ACPI specification provides a non-ambiguous way to communicate this property do not expose this to userspace. Software that had been using this property must already be prepared for the case where the property is not provided on older kernels, so it is safe to remove this attribute. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
215 lines
6.4 KiB
Plaintext
215 lines
6.4 KiB
Plaintext
For all of the nmem device attributes under nfit/*, see the 'NVDIMM Firmware
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Interface Table (NFIT)' section in the ACPI specification
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(http://www.uefi.org/specifications) for more details.
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What: /sys/bus/nd/devices/nmemX/nfit/serial
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Date: Jun, 2015
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KernelVersion: v4.2
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) Serial number of the NVDIMM (non-volatile dual in-line
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memory module), assigned by the module vendor.
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What: /sys/bus/nd/devices/nmemX/nfit/handle
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Date: Apr, 2015
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KernelVersion: v4.2
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) The address (given by the _ADR object) of the device on its
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parent bus of the NVDIMM device containing the NVDIMM region.
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What: /sys/bus/nd/devices/nmemX/nfit/device
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Date: Apr, 2015
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KernelVersion: v4.1
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) Device id for the NVDIMM, assigned by the module vendor.
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What: /sys/bus/nd/devices/nmemX/nfit/rev_id
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Date: Jun, 2015
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KernelVersion: v4.2
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) Revision of the NVDIMM, assigned by the module vendor.
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What: /sys/bus/nd/devices/nmemX/nfit/phys_id
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Date: Apr, 2015
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KernelVersion: v4.2
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) Handle (i.e., instance number) for the SMBIOS (system
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management BIOS) Memory Device structure describing the NVDIMM
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containing the NVDIMM region.
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What: /sys/bus/nd/devices/nmemX/nfit/flags
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Date: Jun, 2015
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KernelVersion: v4.2
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) The flags in the NFIT memory device sub-structure indicate
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the state of the data on the nvdimm relative to its energy
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source or last "flush to persistence".
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The attribute is a translation of the 'NVDIMM State Flags' field
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in section 5.2.25.3 'NVDIMM Region Mapping' Structure of the
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ACPI specification 6.2.
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The health states are "save_fail", "restore_fail", "flush_fail",
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"not_armed", "smart_event", "map_fail" and "smart_notify".
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What: /sys/bus/nd/devices/nmemX/nfit/format
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What: /sys/bus/nd/devices/nmemX/nfit/format1
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What: /sys/bus/nd/devices/nmemX/nfit/formats
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Date: Apr, 2016
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KernelVersion: v4.7
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) The interface codes indicate support for persistent memory
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mapped directly into system physical address space and / or a
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block aperture access mechanism to the NVDIMM media.
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The 'formats' attribute displays the number of supported
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interfaces.
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This layout is compatible with existing libndctl binaries that
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only expect one code per-dimm as they will ignore
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nmemX/nfit/formats and nmemX/nfit/formatN.
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What: /sys/bus/nd/devices/nmemX/nfit/vendor
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Date: Apr, 2016
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KernelVersion: v4.7
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) Vendor id of the NVDIMM.
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What: /sys/bus/nd/devices/nmemX/nfit/dsm_mask
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Date: May, 2016
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KernelVersion: v4.7
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) The bitmask indicates the supported device specific control
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functions relative to the NVDIMM command family supported by the
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device
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What: /sys/bus/nd/devices/nmemX/nfit/family
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Date: Apr, 2016
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KernelVersion: v4.7
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) Displays the NVDIMM family command sets. Values
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0, 1, 2 and 3 correspond to NVDIMM_FAMILY_INTEL,
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NVDIMM_FAMILY_HPE1, NVDIMM_FAMILY_HPE2 and NVDIMM_FAMILY_MSFT
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respectively.
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See the specifications for these command families here:
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http://pmem.io/documents/NVDIMM_DSM_Interface-V1.6.pdf
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https://github.com/HewlettPackard/hpe-nvm/blob/master/Documentation/
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https://msdn.microsoft.com/library/windows/hardware/mt604741"
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What: /sys/bus/nd/devices/nmemX/nfit/id
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Date: Apr, 2016
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KernelVersion: v4.7
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) ACPI specification 6.2 section 5.2.25.9, defines an
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identifier for an NVDIMM, which refelects the id attribute.
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What: /sys/bus/nd/devices/nmemX/nfit/subsystem_vendor
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Date: Apr, 2016
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KernelVersion: v4.7
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) Sub-system vendor id of the NVDIMM non-volatile memory
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subsystem controller.
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What: /sys/bus/nd/devices/nmemX/nfit/subsystem_rev_id
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Date: Apr, 2016
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KernelVersion: v4.7
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) Sub-system revision id of the NVDIMM non-volatile memory subsystem
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controller, assigned by the non-volatile memory subsystem
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controller vendor.
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What: /sys/bus/nd/devices/nmemX/nfit/subsystem_device
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Date: Apr, 2016
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KernelVersion: v4.7
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) Sub-system device id for the NVDIMM non-volatile memory
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subsystem controller, assigned by the non-volatile memory
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subsystem controller vendor.
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What: /sys/bus/nd/devices/ndbusX/nfit/revision
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Date: Jun, 2015
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KernelVersion: v4.2
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) ACPI NFIT table revision number.
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What: /sys/bus/nd/devices/ndbusX/nfit/scrub
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Date: Sep, 2016
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KernelVersion: v4.9
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RW) This shows the number of full Address Range Scrubs (ARS)
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that have been completed since driver load time. Userspace can
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wait on this using select/poll etc. A '+' at the end indicates
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an ARS is in progress
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Writing a value of 1 triggers an ARS scan.
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What: /sys/bus/nd/devices/ndbusX/nfit/hw_error_scrub
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Date: Sep, 2016
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KernelVersion: v4.9
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RW) Provides a way to toggle the behavior between just adding
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the address (cache line) where the MCE happened to the poison
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list and doing a full scrub. The former (selective insertion of
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the address) is done unconditionally.
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This attribute can have the following values written to it:
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'0': Switch to the default mode where an exception will only
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insert the address of the memory error into the poison and
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badblocks lists.
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'1': Enable a full scrub to happen if an exception for a memory
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error is received.
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What: /sys/bus/nd/devices/ndbusX/nfit/dsm_mask
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Date: Jun, 2017
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KernelVersion: v4.13
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) The bitmask indicates the supported bus specific control
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functions. See the section named 'NVDIMM Root Device _DSMs' in
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the ACPI specification.
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What: /sys/bus/nd/devices/regionX/nfit/range_index
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Date: Jun, 2015
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KernelVersion: v4.2
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Contact: linux-nvdimm@lists.01.org
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Description:
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(RO) A unique number provided by the BIOS to identify an address
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range. Used by NVDIMM Region Mapping Structure to uniquely refer
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to this structure. Value of 0 is reserved and not used as an
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index.
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