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[PATCH 0/4] hw/block/nvme: Implement ZNS finish-zone ZDC AEN
From: |
clay.mayers |
Subject: |
[PATCH 0/4] hw/block/nvme: Implement ZNS finish-zone ZDC AEN |
Date: |
Thu, 20 Oct 2022 17:18:31 -0700 |
From: Clay Mayers <clay.mayers@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.
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 | 166 +++++++++++++++++++++++++++++++++--
hw/nvme/ns.c | 15 ++++
hw/nvme/nvme.h | 37 +++++++-
hw/nvme/trace-events | 3 +-
include/block/nvme.h | 14 ++-
6 files changed, 225 insertions(+), 15 deletions(-)
--
2.27.0
- [PATCH 0/4] hw/block/nvme: Implement ZNS finish-zone ZDC AEN,
clay.mayers <=