[PATCH v2 0/9] gpu: nova-core: gsp: add RM control command infrastructure

[Eliot Courtney <ecourtney@nvidia.com>]

Add the infrastructure for sending RM control RPCs. This is needed e.g.
for channel allocation.

This series adds:
- `NV_STATUS` bindings and wrapping `NvStatus` enum (used by RM control
  RPCs)
- The necessary bindings for the RM control RPCs.
- `RmControlMsgFunction` to identify individual control commands, like
  `MsgFunction` for GSP commands.
- `SBufferIter::read_to_vec` (using KVVec) for reading large RPC payloads
- A `send_rm_control` helper that sends a control and checks its
  NvStatus
- One usage of `send_rm_control`: the `CeGetFaultMethodBufferSize`
  RPC. This is useful for channel allocation later.

Each new RM control command can be added by extending
`RmControlMsgFunction`, adding the bindings and wrappers for their
parameters, and writing a type-safe wrapper to send and receive the
reply for the RM control rpc, using `send_rm_control`.

This series applies on latest drm-rust-next with the listed
pre-requisites.

Signed-off-by: Eliot Courtney <ecourtney@nvidia.com>
---
Changes in v2:
- Introduce typed Handle<T> for RM objects.
- Improve naming
- Improve doc comments
- Change SBufferIter to always use KVVec
- flush_into_kvec -> read_to_vec
- Rebased on latest cmdq locking
- Link to v1: https://lore.kernel.org/r/20260227-rmcontrol-v1-0-86648e4869f9@nvidia.com

---
Eliot Courtney (9):
      gpu: nova-core: gsp: add NV_STATUS error code bindings
      gpu: nova-core: gsp: add NvStatus enum for RM control errors
      gpu: nova-core: gsp: expose GSP-RM internal client and subdevice handles
      gpu: nova-core: gsp: add RM control RPC structure binding
      gpu: nova-core: gsp: add types for RM control RPCs
      gpu: nova-core: use KVVec for SBufferIter flush
      gpu: nova-core: gsp: add RM control command infrastructure
      gpu: nova-core: gsp: add CE fault method buffer size bindings
      gpu: nova-core: gsp: add CeGetFaultMethodBufferSize RM control command

 drivers/gpu/nova-core/gsp.rs                      |   1 +
 drivers/gpu/nova-core/gsp/commands.rs             |  64 ++++
 drivers/gpu/nova-core/gsp/fw.rs                   | 402 ++++++++++++++++++++++
 drivers/gpu/nova-core/gsp/fw/commands.rs          |  19 +-
 drivers/gpu/nova-core/gsp/fw/r570_144/bindings.rs | 161 +++++++++
 drivers/gpu/nova-core/gsp/fw/rm.rs                | 103 ++++++
 drivers/gpu/nova-core/gsp/rm.rs                   |   3 +
 drivers/gpu/nova-core/gsp/rm/commands.rs          | 147 ++++++++
 drivers/gpu/nova-core/gsp/sequencer.rs            |   4 +-
 drivers/gpu/nova-core/sbuffer.rs                  |   6 +-
 10 files changed, 904 insertions(+), 6 deletions(-)
---
base-commit: d19ab42867ae7c68be84ed957d95712b7934773f
change-id: 20260225-rmcontrol-bd8a06fc3a0d
prerequisite-message-id: <20260318-cmdq-locking-v5-0-18b37e3f9069@nvidia.com>
prerequisite-patch-id: fefd403caf8af386276351dd12397dda8ae8553f
prerequisite-patch-id: 3e02192944c4dde97e6895a28371479aa49ddc96
prerequisite-patch-id: 0d4f54098125ee748489a7fcf2ec8ddaf2040bb6
prerequisite-patch-id: 45041e4ac74e3ea76ea8dd0632e7746418bdf822
prerequisite-patch-id: 0506bfdd3d8bb9c6efe7fc9246fc3695f8ffc338

Best regards,
-- 
Eliot Courtney <ecourtney@nvidia.com>