[PATCH v4 0/6] gpu: nova-core: boot GSP with vGPU enabled

Booting GSP with vGPU enabled is part of the first milestone (M1)
together with the Rust fwctl abstraction [1] and the nova-core fwctl
driver [2] for upstream vGPU support. It allows us to validate the basic
GSP boot flow with vGPU enabled and 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].

This version is based on drm-rust-next plus Alexandre's v6 GSP boot
process consolidation series [4]. The FSP response header rename and
dynamic SetRegistry conversion from v3 have since been pushed to
drm-rust-next, so this series now contains six patches.

Changes in v4:

- Rebase on the latest drm-rust-next and Alexandre's v6 GSP boot process
  consolidation series.
- Add a conditional C helper for pci_sriov_get_totalvfs() so the Rust
  abstraction also builds when CONFIG_PCI_IOV is disabled.
- Return Option<NonZero<u16>> from the Rust SR-IOV helper so callers must
  handle the unavailable-SR-IOV case explicitly.
- Derive Debug for VgpuState and log the complete state when
  VgpuManager is constructed.
- Warn and fall back to VgpuState::Disabled when the optional vGPU state
  cannot be detected, so a detection failure does not prevent a
  bare-metal probe.
- Document vGPU state detection, split the vGPU HAL implementations into
  per-chip modules, and call the HAL method directly through the exposed
  trait and selector.

v3:

- Split the FSP response header rename from the FSP PRC vGPU mode query
  into a separate patch.
- Change pci_sriov_get_totalvfs() to return unsigned int on the C side
  while keeping the Rust helper as u16.
- Move the vGPU capability gate into a dedicated vgpu::hal module.
- Represent detected vGPU state as VgpuState instead of separate
  enabled/total_vfs accessors.
- Keep total_vfs values below 2 on the disabled path, with an explicit
  comment for the current single-VF limitation.
- Use the generated 570.144 GSP_FW_HEAP_SIZE_VGPU_DEFAULT binding for
  vGPU WPR2 heap sizing, and keep unsupported 0/1-VF states out of the
  vGPU heap path through VgpuState.

v2:

- Rebase on top of Alexandre's GSP boot process consolidation series.
- Drop the FSP response, FSP documentation, and GspBootContext patches
  that are already in drm-rust-next or superseded by the prerequisite
  boot consolidation series.
- Change pci_sriov_get_totalvfs() to return u16 and update existing C
  callers accordingly.
- Make the Rust sriov_get_totalvfs() helper return u16 directly.
- Rework the FSP PRC vGPU mode query to use typed subcommand, object ID,
  flags, request, and response structures.
- Move vGPU state detection before GSP boot into a read-only VgpuManager,
  avoiding Mutex/Cell based mutation during boot.
- Add a HAL method for the vGPU capability gate.
- Split the SetRegistry changes into a dynamic-entry refactor and the
  RMSetSriovMode functional change.
- Rework WPR2 heap sizing to consume VgpuManager, keep the vGPU heap-size
  helper in gsp/fw.rs, and drop the 1VM heap-size special case.

[1] https://lore.kernel.org/rust-for-linux/[email protected]/
[2] https://lore.kernel.org/rust-for-linux/[email protected]/
[3] https://github.com/zhiwang-nvidia/nova-core/tree/zhi/nova-vgpu-wip
[4] https://lore.kernel.org/all/[email protected]/

Zhi Wang (6):
  PCI/IOV: Return unsigned int from pci_sriov_get_totalvfs()
  rust: pci: add sriov_get_totalvfs() helper
  gpu: nova-core: read vGPU mode from FSP via PRC protocol
  gpu: nova-core: add vGPU preludes
  gpu: nova-core: set RMSetSriovMode for vGPU
  gpu: nova-core: reserve vGPU WPR2 heap

 drivers/gpu/nova-core/fb.rs                   |  25 ++-
 drivers/gpu/nova-core/fsp.rs                  | 172 ++++++++++++++++++
 drivers/gpu/nova-core/gpu.rs                  |   7 +
 drivers/gpu/nova-core/gsp.rs                  |   2 +
 drivers/gpu/nova-core/gsp/boot.rs             |   4 +-
 drivers/gpu/nova-core/gsp/commands.rs         |  14 +-
 drivers/gpu/nova-core/gsp/fw.rs               |   5 +
 .../gpu/nova-core/gsp/fw/r570_144/bindings.rs |   1 +
 drivers/gpu/nova-core/mctp.rs                 |   2 +
 drivers/gpu/nova-core/nova_core.rs            |   1 +
 drivers/gpu/nova-core/vgpu.rs                 |  90 +++++++++
 drivers/gpu/nova-core/vgpu/hal.rs             |  25 +++
 drivers/gpu/nova-core/vgpu/hal/gb202.rs       |  15 ++
 drivers/gpu/nova-core/vgpu/hal/tu102.rs       |  15 ++
 drivers/pci/iov.c                             |   2 +-
 include/linux/pci.h                           |   4 +-
 rust/helpers/pci.c                            |   8 +
 rust/kernel/pci.rs                            |  13 ++
 18 files changed, 394 insertions(+), 11 deletions(-)
 create mode 100644 drivers/gpu/nova-core/vgpu.rs
 create mode 100644 drivers/gpu/nova-core/vgpu/hal.rs
 create mode 100644 drivers/gpu/nova-core/vgpu/hal/gb202.rs
 create mode 100644 drivers/gpu/nova-core/vgpu/hal/tu102.rs


base-commit: d85845b64c0020b2812243a22fa79d57cc1c1e38
prerequisite-patch-id: f0a0ce0462acc6881b0255d041605544baf85636
prerequisite-patch-id: 7f0350ec963632f62c0c11f3f31331fc61bf3d30
prerequisite-patch-id: 49215f9c00b0f49a63066e3f64f87c2d89467907
prerequisite-patch-id: 952b67f6cd6c4c32ad141a83476067761d96facd
prerequisite-patch-id: 04f4e5dfde6f418544eae9d44737521bb1ca571b
prerequisite-patch-id: 33740a010f5ebdf7da99338b809bc84e6477a887
prerequisite-patch-id: 21f6c58981b5644bf060ce927643243f9d22b476
prerequisite-patch-id: 0bd4a3c41b8f8947ee2fb02e181f37f7b7774f88
prerequisite-patch-id: dfefdb3c87a4022b93a1003ebe566f1945a735d1
prerequisite-patch-id: 329ac78d2f0e13b20781e1859a6976cda4db2cf6
prerequisite-patch-id: 92004c279388e29ec036dfa4e69ebfccebab80fd
prerequisite-patch-id: dfd10bc2d272d344b6746ce3a05c73773b743696
prerequisite-patch-id: 1cfa743488bce0038da31b14dbe57297ca6381b9
-- 
2.51.0