On Oct 21 16:10, clay.may...@kioxia.com wrote: > From: Clay Mayers <clay.may...@kioxia.com> > > ZNS controllers have the option to limit the time a zone can remain in > the active state. It begins with a background process in the controller > setting the finish-zone-recommended FZR attribute for a zone. As part of > setting this attribute, the zone's id is added to the namespace's > zone-descriptor-changed (ZDC) log page. If enabled, items added to the > ZDC log page generate a ZDC "asynchronous event notification" AEN. Optionally, > the control can induce a "zone excursion" forcing the zone into the finished > state that also generates a ZDC event. > > Zone enabled applications need to properly handle ZDC events. In a real > device, > the timeout is many hours making testing an application difficult. > Implemented is the generation of FZR ZDC events to speed up O/S and > application > testing. > > Added to the zoned NVMe command set is an optional, per-namespace timer > (zoned.finish_time) to set the FZR attr for long-lived active zones; A per > namespace ZDC log page; AEN results to including CQE.DW1 (the NSID of the ZDC > AEN) and generating a ZDC AEN if it's been enabled. Zone excursions are not > modeled. > > See section 5.5 of the NVMe Zoned Namespace Command Set Specification v1.1 > for more details. > > Changes since v1 > - Fixed offset length checking in zdc log page > - Moved zdc_event_queued to the patch 4 > - Unwatched zdc events in nvme_exit() > > Clay Mayers (4): > hw/block/nvme: add ZONE_FINISH_RECOMMENDED functionality > hw/block/nvme: add zone descriptor changed log page > hw/block/nvme: supply dw1 for aen result > hw/block/nvme: add zone descriptor changed AEN > > docs/system/devices/nvme.rst | 5 + > hw/nvme/ctrl.c | 174 +++++++++++++++++++++++++++++++++-- > hw/nvme/ns.c | 15 +++ > hw/nvme/nvme.h | 37 +++++++- > hw/nvme/trace-events | 3 +- > include/block/nvme.h | 14 ++- > 6 files changed, 233 insertions(+), 15 deletions(-) > > -- > 2.27.0 >
Nice work Clay! Series looks good to me, Reviewed-by: Klaus Jensen <k.jen...@samsung.com>
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