• K
    NVMe: Update SCSI Inquiry VPD 83h translation · 4f1982b4
    Keith Busch 提交于
    The original translation created collisions on Inquiry VPD 83 for many
    existing devices. Newer specifications provide other ways to translate
    based on the device's version can be used to create unique identifiers.
    
    Version 1.1 provides an EUI64 field that uniquely identifies each
    namespace, and 1.2 added the longer NGUID field for the same reason.
    Both follow the IEEE EUI format and readily translate to the SCSI device
    identification EUI designator type 2h. For devices implementing either,
    the translation will use this type, defaulting to the EUI64 8-byte type if
    implemented then NGUID's 16 byte version if not. If neither are provided,
    the 1.0 translation is used, and is updated to use the SCSI String format
    to guarantee a unique identifier.
    
    Knowing when to use the new fields depends on the nvme controller's
    revision. The NVME_VS macro was not decoding this correctly, so that is
    fixed in this patch and moved to a more appropriate place.
    
    Since the Identify Namespace structure required an update for the NGUID
    field, this patch adds the remaining new 1.2 fields to the structure.
    Signed-off-by: NKeith Busch <keith.busch@intel.com>
    4f1982b4
nvme.h 12.1 KB