[PATCH 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::flush_into_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. Alternatively, there is a branch with all dependency
commits included [1].

[1] https://github.com/Edgeworth/linux/tree/b4/rmcontrol

Signed-off-by: Eliot Courtney <ecourtney@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: generalize `flush_into_kvec` to `flush_into_vec`
      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             |  16 +
 drivers/gpu/nova-core/gsp/fw.rs                   | 402 ++++++++++++++++++++++
 drivers/gpu/nova-core/gsp/fw/commands.rs          |  10 +
 drivers/gpu/nova-core/gsp/fw/r570_144/bindings.rs | 161 +++++++++
 drivers/gpu/nova-core/gsp/fw/rm.rs                |  99 ++++++
 drivers/gpu/nova-core/gsp/rm.rs                   |   3 +
 drivers/gpu/nova-core/gsp/rm/commands.rs          | 141 ++++++++
 drivers/gpu/nova-core/sbuffer.rs                  |  31 +-
 9 files changed, 860 insertions(+), 4 deletions(-)
---
base-commit: 4a49fe23e357b48845e31fe9c28a802c05458198
change-id: 20260225-rmcontrol-bd8a06fc3a0d
prerequisite-message-id: <20260226-cmdq-continuation-v3-0-572ab9916766@nvidia.com>
prerequisite-patch-id: fd45bc5b8eda5e2b54a052dddb1a1c363107f0a7
prerequisite-patch-id: d0f59ef489346e978a222755f9fb42dfe7af19e5
prerequisite-patch-id: 8844970d0e387488c70979a73732579ba174b46c
prerequisite-patch-id: e138a94ed48fa8d50d5ed1eb36524f98923ed478
prerequisite-patch-id: 4599a5e90d6665fa3acb7d4045de5d378ac28b4d
prerequisite-patch-id: 30ed64c398e541d6efbcb2e46ed9a9e6cf953f4f
prerequisite-patch-id: 9a965e9f29c8680c0b554e656ff8e9a1bfc67280
prerequisite-patch-id: d8cccc3dfb070f304805fc7e0f24121809b4b300
prerequisite-patch-id: c0a73dfd1fb630ab02486f0180b90f8fe850b4dc
prerequisite-message-id: <20260226-cmdq-locking-v2-0-c7e16a6d5885@nvidia.com>
prerequisite-patch-id: fefd403caf8af386276351dd12397dda8ae8553f
prerequisite-patch-id: 1fb4b67abba75a81bd5ee5e545a7caae8046a3ea
prerequisite-patch-id: 10c23618b43dc8fea11f7b23d1d9389d04ede08d
prerequisite-patch-id: cf0393b708109d4264745131a511eef7218aa173

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