hw/block/nvme: Support Zoned NS Command Set

hw/block/nvme: Support Zoned NS Command Set

Define values and structures that are needed to support Zoned
Namespace Command Set (NVMe TP 4053) in PCI NVMe controller emulator.

All new protocol definitions are located in include/block/nvme.h
and everything added that is specific to this implementation is kept
in hw/block/nvme.h.

In order to improve scalability, all open, closed and full zones
are organized in separate linked lists. Consequently, almost all
zone operations don't require scanning of the entire zone array
(which potentially can be quite large) - it is only necessary to
enumerate one or more zone lists. Zone lists are designed to be
position-independent as they can be persisted to the backing file
as a part of zone metadata. NvmeZoneList struct defined in this patch
serves as a head of every zone list.

NvmeZone structure encapsulates NvmeZoneDescriptor defined in Zoned
Command Set specification and adds a few more fields that are
internal to this implementation.

The emulation code has been changed to advertise NVM Command Set when
"zoned" device property is not set (default) and Zoned Namespace
Command Set otherwise.

Handlers for three new NVMe commands introduced in Zoned Namespace
Command Set specification are added, namely for Zone Management
Receive, Zone Management Send and Zone Append.

Device initialization code has been extended to create a proper
configuration for zoned operation using device properties.

Read/Write command handler is modified to only allow writes at the
write pointer if the namespace is zoned. For Zone Append command,
writes implicitly happen at the write pointer and the starting write
pointer value is returned as the result of the command. Write Zeroes
handler is modified to add zoned checks that are identical to those
done as a part of Write flow.

The code to support for Zone Descriptor Extensions is not included in
this commit and ZDES 0 is always reported. A later commit in this
series will add ZDE support.

This commit doesn't yet include checks for active and open zone
limits. It is assumed that there are no limits on either active or
open zones.

Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Hans Holmberg <hans.holmberg@wdc.com>
Signed-off-by: Ajay Joshi <ajay.joshi@wdc.com>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Matias Bjorling <matias.bjorling@wdc.com>
Signed-off-by: Aravind Ramesh <aravind.ramesh@wdc.com>
Signed-off-by: Alexey Bogoslavsky <alexey.bogoslavsky@wdc.com>
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Signed-off-by: Adam Manzanares <adam.manzanares@wdc.com>
Signed-off-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>