xyz/openbmc_project/Inventory/Item/Dimm.interface.yaml

description: >
    Implement to provide DIMM attributes.
properties:
    - name: MemoryDataWidth
      type: uint16
      description: >
          Data width of Memory.
    - name: MemorySizeInKB
      type: uint32
      description: >
          Memory size of DIMM in Kilobyte.
    - name: MemoryDeviceLocator
      type: string
      description: >
          Socket on base board where Memory located, for example CPU1_DIMM_B1.
    - name: MemoryType
      type: enum[self.DeviceType]
      description: >
          Type of memory.
    - name: MemoryTypeDetail
      type: string
      description: >
          Additional detail on Memory, such as Synchronous, Static column, etc.
    - name: MaxMemorySpeedInMhz
      type: uint16
      description: >
          The maximum capable clock speed of Memory, in megahertz.
    - name: MemoryAttributes
      type: byte
      description: >
          Rank attributes of Memory. Means how many groups of memory chips on
          the dimm.
    - name: MemoryConfiguredSpeedInMhz
      type: uint16
      description: >
          Configured clock speed to Memory, in megahertz.
    - name: ECC
      type: enum[self.Ecc]
      description: >
          Error-Correcting Code.
    - name: CASLatencies
      type: uint16
      description: >
          CAS Latency (CL) values are supported. The CAS latency is the delay
          between the time at which the column address and the column address
          strobe signal are presented to the memory module and the time at
          which the corresponding data is made available by the memory module.
    - name: RevisionCode
      type: uint16
      description: >
          Revision code provided by the individual manufacturer.
    - name: FormFactor
      type: enum[self.FormFactor]
      description: >
          The base module type of the memory.
    - name: MemoryTotalWidth
      type: uint16
      description: >
          The bus width, in bits.
    - name: AllowedSpeedsMT
      type: array[uint16]
      description: >
          Speeds supported by this memory in megatransfers.

enumerations:
    - name: Ecc
      description: >
          Error-Correcting Code.
      values:
        - name: NoECC
          description: >
              No ECC support.
        - name: SingleBitECC
          description: >
              Single bit data errors can be corrected by ECC.
        - name: MultiBitECC
          description: >
              Multibit data errors can be corrected by ECC.
        - name: AddressParity
          description: >
              Address parity errors can be corrected.
    - name: Type
      description: >
          This property shall contain the type ofmemory that this Resource
          represents.
      values:
        - name: DRAM
          description: >
              The memory module is comprised of volatile memory.
        - name: NVDIMM_N
          description: >
              The memory module is comprised of volatile memory backed by
              non-volatile memory.
        - name: NVDIMM_F
          description: >
              The memory module is comprised of non-volatile memory.
        - name: NVDIMM_P
          description: >
              The memory module is comprised of a combination of non-volatile
              and volatile memory.
        - name: IntelOptane
          description: >
              The memory module is an Intel Optane DC Persistent Memory Module.
    - name: DeviceType
      description: >
          This property shall contain the Memory Device Type as defined by
          SMBIOS.
      values:
        - name: Other
          description: >
              Some devices which are not defined in this table.
        - name: Unknown
          description: >
              Unknown device.
        - name: DRAM
          description: >
              Dynamic Random Access Memory.
        - name: EDRAM
          description: >
              Enhanced Dynamic Random Access Memory.
        - name: VRAM
          description: >
              Video Random Access Memory.
        - name: SRAM
          description: >
              Static Random Access Memory.
        - name: RAM
          description: >
              Random Access Memory.
        - name: ROM
          description: >
              Read Only Memory.
        - name: FLASH
          description: >
              Flash Memory.
        - name: EEPROM
          description: >
              Electrically Erasable Programmable Read Only Memory.
        - name: FEPROM
          description: >
              Flash Erasable Programmable Read Only Memory.
        - name: EPROM
          description: >
              Erasable Programmable Read Only Memory.
        - name: CDRAM
          description: >
              Cached Dynamic Random Access Memory.
        - name: ThreeDRAM
          description: >
              Three Dimensional Random Access Memory.
        - name: SDRAM
          description: >
              Synchronous Dynamic Random Access Memory.
        - name: DDR_SGRAM
          description: >
              Double Data Rate Synchronous Graphics Random-Access Memory.
        - name: RDRAM
          description: >
              Direct Rambus Dynamic Random Access Memory.
        - name: DDR
          description: >
              Double Data Rate SDRAM.
        - name: DDR2
          description: >
              Double Data Rate 2 SDRAM.
        - name: DDR2_SDRAM_FB_DIMM
          description: >
              DDR2 SDRAM Fully Buffered DIMM.
        - name: EDO
          description: >
              Extended Data Output Memory.
        - name: FastPageMode
          description: >
              Fast Page Mode Memory.
        - name: PipelinedNibble
          description: >
              Pipelined Nibble Memory.
        - name: DDR3
          description: >
              Double Data Rate 3 SDRAM.
        - name: FBD2
          description: >
              Fully Buffered DIMM 2.
        - name: DDR4
          description: >
              Double Data Rate 4 SDRAM.
        - name: LPDDR_SDRAM
          description: >
              Low-Power Double Data Rate SDRAM.
        - name: LPDDR2_SDRAM
          description: >
              Low-Power Double Data Rate 2 SDRAM.
        - name: LPDDR3_SDRAM
          description: >
              Low-Power Double Data Rate 3 SDRAM.
        - name: LPDDR4_SDRAM
          description: >
              Low-Power Double Data Rate 4 SDRAM.
        - name: Logical
          description: >
              Logical Non-volatile device.
        - name: HBM
          description: >
              High Bandwidth Memory
        - name: HBM2
          description: >
              High Bandwidth Memory Generation 2.
        - name: DDR2_SDRAM_FB_DIMM_PROB
          description: >
              DDR2 SDRAM Fully Buffered DIMM PROBE.
        - name: DDR4E_SDRAM
          description: >
              Double Data Rate 4 Extended Compliant SDRAM.
    - name: FormFactor
      description: >
          Implementation form factor for this memory device.
      values:
        - name: RDIMM
          description: >
              Registered DIMM.
        - name: UDIMM
          description: >
              Unbuffered DIMM.
        - name: SO_DIMM
          description: >
              Small Outline DIMM.
        - name: LRDIMM
          description: >
              Load-reduced DIMMs.
        - name: Mini_RDIMM
          description: >
              mini Registered DIMM.
        - name: Mini_UDIMM
          description: >
              mini Unbuffered DIMM.
        - name: SO_RDIMM_72b
          description: >
              Small Outline Registered DIMM.
        - name: SO_UDIMM_72b
          description: >
              Small Outline Unbuffered DIMM.
        - name: SO_DIMM_16b
          description: >
              Small Outline DIMM 16 bit.
        - name: SO_DIMM_32b
          description: >
              Small Outline DIMM 32 bit.
        - name: Die
          description: >
              A die within a package.