Message-Id: <20250826-nova_firmware-v2-0-93566252fe3a@nvidia.com>
Date: Tue, 26 Aug 2025 13:07:36 +0900
From: Alexandre Courbot <acourbot@...dia.com>
To: Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
 Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
 Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
 Benno Lossin <lossin@...nel.org>, Andreas Hindborg <a.hindborg@...nel.org>, 
 Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>, 
 Danilo Krummrich <dakr@...nel.org>, David Airlie <airlied@...il.com>, 
 Simona Vetter <simona@...ll.ch>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>
Cc: John Hubbard <jhubbard@...dia.com>, 
 Alistair Popple <apopple@...dia.com>, 
 Joel Fernandes <joelagnelf@...dia.com>, Timur Tabi <ttabi@...dia.com>, 
 rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org, 
 nouveau@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, 
 Alexandre Courbot <acourbot@...dia.com>
Subject: [PATCH v2 0/8] gpu: nova-core: process and prepare more firmwares
 to boot GSP

This series makes more progress on the GSP boot process for Ampere GPUs.

At the end of the previous series [1], we were left with a WPR memory
region created by the FRTS firmware, but still far from the GSP running.
This series brings us closer to that goal by preparing 3 firmware
packages:

* The Booter firmware, which the driver loads and runs on the SEC2
  falcon;
* The GSP bootloader, which is loaded by Booter onto the GSP RISC-V
  core;
* The GSP firmware itself, which is verified and loaded by the GSP
  bootloader.

There 3 bundles are involved in a rather complex dance that is made
necessary by limitations related to the level of privilege required to
load code onto the GSP (doing so requires a Heavy Secured signed
firmware, which is the role fulfilled by Booter).

The first patch is an addition to `FromBytes` that makes it able to
process the unaligned headers contained in the firmware files by
performing a copy. Second patch adds support for a header commonly used
in NVIDIA firmware files. Both are relatively simple.

The third patch parses the Booter firmware file, queries the hardware
for the right signature to use, and patch it into the firmware blob.
This makes Booter ready to load and run.

Fourth patch takes care of preparing the GSP bootloader for execution
and fifth one does the same for the GSP firmware, which needs to come
with its own device-mapped page table.

Sixth and seventh patches switch to the 570.144 firmware and introduce
the layout for its bindings. The raw bindings are stored in a private
module, and abstracted/reexported by the parent module as needed. This
allows consumer modules to access a safer/nicer form of the bindings
than the raw one, and also makes it easier to switch to a different (and
potentially incompatible) firmware version in the future.

570.144 has been picked because it is the latest firmware currently in
linux-firmware, but as development progresses the plan is to switch to a
newer one that is designed with the constraint of upstream in mind. So
support for 570.144 will be dropped in the future. Support for multiple
firmware versions is not considered at the moment: there is no immediate
need for it as the driver is still unstable, and we can think about this
point once we approach stability (and have better visibility about the
shape of the firmware at that point).

The last patch introduces the first bindings and uses them to compute
more framebuffer layout information needed for booting the GSP. A
separate patch series will pick up from there to use this information
and finally run these firmware blobs.

The base of this series is today's nova-next, but there a few more
unmerged dependencies required:

- BorrowedPage, AsPageIter and VmallocPageIter [2]
- Rust infrastructure for sg_table and scatterlist [3]
- FromBytes [4]
- The Alignment series [5]

[1] https://lore.kernel.org/rust-for-linux/20250619-nova-frts-v6-0-ecf41ef99252@nvidia.com/
[2] https://lore.kernel.org/rust-for-linux/20250820145434.94745-1-dakr@kernel.org/
[3] https://lore.kernel.org/rust-for-linux/20250825132539.122412-1-dakr@kernel.org/
[4] https://lore.kernel.org/rust-for-linux/20250824213134.27079-1-christiansantoslima21@gmail.com/
[5] https://lore.kernel.org/rust-for-linux/20250821-num-v4-0-1f3a425d7244@nvidia.com/

Signed-off-by: Alexandre Courbot <acourbot@...dia.com>
---
Changes in v2:
- Add some GSP bindings and use them to compute more FB layout info
  needed to boot GSP,
- Use PinInit in GspFirmware to avoid several heap allocations,
- Rename `bootloader` to `gsp_bootloader` in `Firmware` to avoid
  confusion with the future Turing falcon bootloader,
- Link to v1: https://lore.kernel.org/r/20250822-nova_firmware-v1-0-ff5633679460@nvidia.com

---
Alexandre Courbot (7):
      rust: transmute: add `from_bytes_copy` method to `FromBytes` trait
      gpu: nova-core: firmware: add support for common firmware header
      gpu: nova-core: firmware: process Booter and patch its signature
      gpu: nova-core: firmware: process the GSP bootloader
      gpu: nova-core: firmware: process and prepare the GSP firmware
      gpu: nova-core: firmware: use 570.144 firmware
      gpu: nova-core: compute layout of more framebuffer regions required for GSP

Alistair Popple (1):
      gpu: nova-core: Add base files for r570.144 firmware bindings

 Documentation/gpu/nova/core/todo.rst            |  17 --
 drivers/gpu/nova-core/falcon.rs                 |   4 +-
 drivers/gpu/nova-core/fb.rs                     | 112 +++++++-
 drivers/gpu/nova-core/fb/hal.rs                 |   4 +
 drivers/gpu/nova-core/fb/hal/ga100.rs           |   6 +-
 drivers/gpu/nova-core/fb/hal/ga102.rs           |  14 +-
 drivers/gpu/nova-core/fb/hal/tu102.rs           |  14 +
 drivers/gpu/nova-core/firmware.rs               | 204 +++++++++++++-
 drivers/gpu/nova-core/firmware/booter.rs        | 356 ++++++++++++++++++++++++
 drivers/gpu/nova-core/firmware/gsp.rs           | 117 ++++++++
 drivers/gpu/nova-core/firmware/riscv.rs         |  89 ++++++
 drivers/gpu/nova-core/gpu.rs                    |  13 +-
 drivers/gpu/nova-core/gsp.rs                    |   7 +
 drivers/gpu/nova-core/nova_core.rs              |   2 +
 drivers/gpu/nova-core/nvfw.rs                   |  42 +++
 drivers/gpu/nova-core/nvfw/r570_144.rs          |  28 ++
 drivers/gpu/nova-core/nvfw/r570_144_bindings.rs | 126 +++++++++
 rust/kernel/transmute.rs                        |  17 ++
 18 files changed, 1135 insertions(+), 37 deletions(-)
---
base-commit: 331c24e6ce814af2af74bac648d1ac1708873e9c
change-id: 20250822-nova_firmware-e0ffb492ba35
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Best regards,
-- 
Alexandre Courbot <acourbot@...dia.com>

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