Message-Id: <20250822-nova_firmware-v1-0-ff5633679460@nvidia.com>
Date: Fri, 22 Aug 2025 21:47:15 +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: 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 0/5] gpu: nova-core: process and prepare more firmwares to
 boot GSP

This series makes more progress on the GSP boot process for Ampere GPUs.
While it does not contain everything I wanted to include, the part I am
sending now looks ready to me so I didn't want to delay it any further.
However, expect the inevitable v2 to include a couple more (hopefully
short and simple :)) patches.

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.

It is a rather complex dance that is made necessary by limitations
regarding the level of privilege required to load code onto the GSP
(this 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.

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.

None of these firmwares are run by this series yet, as we still need to
build the data structure that Booter uses to load the bootloader. This
part should come soon, in its own series.

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

- BorrowedPage, AsPageIter and VmallocPageIter [2]
- Rust infrastructure for sg_table and scatterlist [3]
- FromBytes [4] (although the current code is based on a modified
  version)
- The Alignment series [5]

[1] https://lore.kernel.org/all/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/all/20250820165431.170195-1-dakr@kernel.org/
[4] https://lore.kernel.org/rust-for-linux/20250811213851.65644-1-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>
---
Alexandre Courbot (5):
      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

 Documentation/gpu/nova/core/todo.rst     |  17 --
 drivers/gpu/nova-core/falcon.rs          |   4 +-
 drivers/gpu/nova-core/firmware.rs        | 200 ++++++++++++++++-
 drivers/gpu/nova-core/firmware/booter.rs | 356 +++++++++++++++++++++++++++++++
 drivers/gpu/nova-core/firmware/gsp.rs    | 116 ++++++++++
 drivers/gpu/nova-core/firmware/riscv.rs  |  89 ++++++++
 drivers/gpu/nova-core/gpu.rs             |  11 +-
 drivers/gpu/nova-core/gsp.rs             |   4 +
 drivers/gpu/nova-core/nova_core.rs       |   1 +
 rust/kernel/transmute.rs                 |  17 ++
 10 files changed, 784 insertions(+), 31 deletions(-)
---
base-commit: 331c24e6ce814af2af74bac648d1ac1708873e9c
change-id: 20250822-nova_firmware-e0ffb492ba35
prerequisite-message-id: <20250820145434.94745-1-dakr@...nel.org>
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prerequisite-patch-id: e9bceff31bbf653d2641194b97eb1c4e5d8b93ee

Best regards,
-- 
Alexandre Courbot <acourbot@...dia.com>

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