[PATCH 0/9] gpu: nova-core: boot GSP with vGPU enabled on

[Zhi Wang <zhiw@nvidia.com>]

Booting up GSP with vGPU enabled is part of the first milestone (M1)
together with rust fwctl abstraction [1] and nova-core fwctl driver [2]
for upstream vGPU support, allowing us to validate the basic GSP boot flow
with vGPU enabled, upload vGPU types even before the remaining nova-core
dependencies are ready. The nova-vgpu WIP patches for all milestones can
be found at [3].

v3:

- Consolidate GSP boot parameters into GspBootContext struct, passed
  through the HAL trait methods instead of individual arguments.
- Add vGPU preludes patch (VgpuManager, Architecture::supports_vgpu,
  GspBootContext fields) as preparation for the vGPU boot changes.
- Rebase on top of the latest drm-rust-next.

Dropped patches:

Dependencies still in progress:

- "populate GSP_VF_INFO when vGPU is enabled" - depends on the
  ExtSriovCapability abstraction [4] which is still under review and
  Gary's on-going io projection work [5].

Ada specific:

- "introduce vgpu_support module param" - select vGPU support based on
  module params.

- "load the scrubber ucode when vGPU support is enabled"

v2:

- Adopt early-return style (Dirk).
- Add #ifndef CONFIG_PCI_IOV helper to fix compilation when
  CONFIG_PCI_IOV is disabled, per (Alex).
- Change return type from Result<i32> to Result<u16> to match the
  PCI spec field width, avoiding try_from at call sites.
- GspVfInfo changed to tuple struct (Alex).
- Use unconditional constructor with Option wrapping instead of
  bool parameter. (Alex)
- Use full initialization expression instead of mutating a zeroed
  value.
- Use .chain() pattern in GspSetSystemInfo::init() for optional
  vGPU info. (Alex)
- Eliminate all magic numbers: add vf_bar_is_64bit() and
  read_vf_bar64_addr() to ExtSriovCapability using PCI bindings
  constants (PCI_BASE_ADDRESS_MEM_TYPE_MASK, etc.).
- Use KVec<RegistryEntry> for dynamic registry entry construction
  instead of hardcoded array (Timur, Joel, Alexandre).
- Replace magic numbers 32/48 with named binding constants
  MAX_PARTITIONS_WITH_GFID_32VM / MAX_PARTITIONS_WITH_GFID from
  OpenRM (Alex).
- Use read_poll_timeout() instead of single read for scrubber
  completion check (Joel).
- Use dev instead of pdev.as_ref() in dev_dbg! (Dirk).
- Change scrubber trigger condition from vgpu_requested to
  fb_layout.wpr2_heap.len() > SZ_256M, checking actual heap size
  instead of vGPU flag. (Alex).

[1] https://lore.kernel.org/rust-for-linux/20260217204909.211793-1-zhiw@nvidia.com/
[2] https://lore.kernel.org/rust-for-linux/20260305190936.398590-1-zhiw@nvidia.com/
[3] https://github.com/zhiwang-nvidia/nova-core/tree/zhi/nova-vgpu-wip
[4] https://lore.kernel.org/rust-for-linux/20260409185254.3869808-1-zhiw@nvidia.com/
[5] https://lore.kernel.org/rust-for-linux/20260421-io_projection-v2-0-4c251c692ef4@garyguo.net/

Zhi Wang (9):
  rust: pci: expose sriov_get_totalvfs() helper
  gpu: nova-core: factor out common FSP message header
  gpu: nova-core: return FSP response buffer to caller
  gpu: nova-core: read vGPU mode from FSP via PRC protocol
  gpu: nova-core: add FSP and PRC protocol documentation
  gpu: nova-core: consolidate GSP boot parameters into GspBootContext
  gpu: nova-core: add vGPU preludes
  gpu: nova-core: set RMSetSriovMode when NVIDIA vGPU is enabled
  gpu: nova-core: reserve a larger GSP WPR2 heap when vGPU is enabled

 Documentation/gpu/nova/core/fsp.rst    | 142 +++++++++++++++++
 Documentation/gpu/nova/index.rst       |   1 +
 drivers/gpu/nova-core/fb.rs            |  17 +-
 drivers/gpu/nova-core/fsp.rs           | 207 ++++++++++++++++++++++---
 drivers/gpu/nova-core/gpu.rs           |  38 ++++-
 drivers/gpu/nova-core/gsp.rs           |  27 ++++
 drivers/gpu/nova-core/gsp/boot.rs      |  60 ++++---
 drivers/gpu/nova-core/gsp/commands.rs  |  93 +++++++----
 drivers/gpu/nova-core/gsp/fw.rs        |  16 ++
 drivers/gpu/nova-core/gsp/hal.rs       |  23 +--
 drivers/gpu/nova-core/gsp/hal/gh100.rs |  22 ++-
 drivers/gpu/nova-core/gsp/hal/tu102.rs |  31 ++--
 drivers/gpu/nova-core/mctp.rs          |   3 +
 drivers/gpu/nova-core/nova_core.rs     |   1 +
 drivers/gpu/nova-core/vgpu.rs          |  47 ++++++
 rust/kernel/pci.rs                     |  12 ++
 16 files changed, 608 insertions(+), 132 deletions(-)
 create mode 100644 Documentation/gpu/nova/core/fsp.rst
 create mode 100644 drivers/gpu/nova-core/vgpu.rs

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2.51.0