Add the ioctl infrastructure to support exporting and importing BOs
to facilitate NPA based memory sharing across GPUs in a rack scale
setup.

Proposed userspace:
https://github.com/ROCm/rocm-systems/blob/35959f8e1260c7cee3e51a740e320be3856ee4ff/projects/rocr-runtime/libhsakmt/src/memory.c#L971
https://github.com/ROCm/rocm-systems/blob/35959f8e1260c7cee3e51a740e320be3856ee4ff/projects/rocr-runtime/libhsakmt/src/memory.c#L1036

v2: Move the ioctl wire-up to the end of the series.

Signed-off-by: Mukul Joshi <mukul.joshi@amd.com>
Signed-off-by: Horatio Zhang <hongkun.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Mirror the read-only ualink info attributes on each secondary compute
partition as a per-partition ualink node, so a partition-scoped consumer
(e.g. a container that only sees its partition's device node) can read
the ualink identity and state. Partition 0 shares the primary device,
which already exposes that node, so it is skipped. An inactive partition
device won't be having any attributes listed under ualink node.

The per-partition attributes are served by thin wrappers that delegate
to the existing device-level info show functions. A reference on the
info kobject is held for the node's lifetime so it cannot be freed
while a partition still uses it.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Assisted-by: Claude (claude-opus-4.7)
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Deactivate accelerator from vpod during hw_fini sequence.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Move more IP version specific related things to ualink version file.
Use soc v1.0 IH client id defintion and define mpnht interrupt source
id in ivsrcid header.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Keep state transitions under lock. Validate the ppod/vpod config or both
based on the state passed by ASP. When a config update is received, if
the GPU is already active on a vpod, local vpod gpu integrity check is
skipped to keep minimal disruption. A gpu removed from the vpod will get
the new vpod id as 0. A GPU is not expected to transition directly from a
valid/nonzero vpod id to another valid vpod id. It needs to be removed
from the existing vpod first.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Add handlers for ualink notifications from ASP. Pause/Resume
notifications are not handled currently.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Add explicit PPOD/VPOD states for clarity. Assign the state accordingly
as received from ASP during initialization.

UALink accel state transitions:

UNCONFIGURED -> PPOD_CONFIGURED -> VPOD_CONFIGURED -> READY -> ACTIVE

- PPOD: sysfs ppod commit/ ASP {UAL_CFG_PPOD}
- VPOD: sysfs vpod commit/ ASP {UAL_CFG_VPOD} | {UAL_CFG_STATION}
- READY: local vpod integrity + activate_accelerator()
- ACTIVE: all local gpus belonging to one vpod are configured and ready.

deactivate_accelerator(): READY -> PPOD_CONFIGURED
invalid vpod: -> ERROR

Query ualink info during late init phase. Add a local vpod integrity
check before activating devices in the vpod. Move the devices to active
state once integrity check passes.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Message handshake with NHT firmware is IP specific. Separate that into
IP specific file. Move ip block v1.0 definition also the version
specific file.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Manage ualink lifecycle as a separate IP block. For now, use GC version
to add specific ualink ip block.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Acked-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Separate out sw_init and hw_init part of ualink. ualink init errors
are ignored temporarily. Keep ualink sysfs init together with sysfs init
sequence of other IPs.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>