linux-kernel - Re: [PATCH v5 00/13] nova-core: Complete GSP boot and begin RPC communication

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Message-ID: <ba4da7b2-39f8-4d23-9a40-581ea94437f2@nvidia.com>
Date: Sat, 15 Nov 2025 18:32:49 -0800
From: John Hubbard <jhubbard@...dia.com>
To: Alexandre Courbot <acourbot@...dia.com>,
 Joel Fernandes <joelagnelf@...dia.com>, linux-kernel@...r.kernel.org,
 rust-for-linux@...r.kernel.org, dri-devel@...ts.freedesktop.org,
 Danilo Krummrich <dakr@...nel.org>
Cc: Alistair Popple <apopple@...dia.com>, Miguel Ojeda <ojeda@...nel.org>,
 Alex Gaynor <alex.gaynor@...il.com>, Boqun Feng <boqun.feng@...il.com>,
 Gary Guo <gary@...yguo.net>, 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>,
 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>,
 Timur Tabi <ttabi@...dia.com>, joel@...lfernandes.org,
 Daniel Almeida <daniel.almeida@...labora.com>,
 nouveau@...ts.freedesktop.org,
 Nouveau <nouveau-bounces@...ts.freedesktop.org>
Subject: Re: [PATCH v5 00/13] nova-core: Complete GSP boot and begin RPC
 communication

On 11/15/25 5:31 AM, Alexandre Courbot wrote:
> On Sat Nov 15, 2025 at 4:55 AM JST, Joel Fernandes wrote:
...
> Pushed to drm-rust-next with the changes I mentioned inline, thanks!
> 
> We will definitely want to make our interfaces evolves some more
> (notably the command queue), and there are still a few nits to address,
> but we have been kicking the can down the road for quite some time with
> this one and in its current shape it provides a good foundation for the
> next stuff to build upon.
> 
> The GSP is now initialized - not that it does anything beyond telling us
> its name, but it's a milestone nonetheless! :)

Yes, a wonderful milestone, congratulations to everyone involved!

And a special thanks to the many Rust for Linux reviewers (that includes Alex
Courbot here), who have been as patient as saints while our Nova team learns
Rust at the same time as writing the driver (!).

Here's the latest dmesg verbose output from today's drm-rust-next running on my
local test machine:

NovaCore 0000:e1:00.0: Probe Nova Core GPU driver.
NovaCore 0000:e1:00.0: NVIDIA (Chipset: GA104, Architecture: Ampere, Revision: a.1)
...
NovaCore 0000:e1:00.0: RISC-V active? true
NovaCore 0000:e1:00.0: GSP RPC: receive: seq# 0, function=Ok(GspRunCpuSequencer), length=0x18e8
NovaCore 0000:e1:00.0: Running CPU Sequencer commands
NovaCore 0000:e1:00.0: CPU Sequencer commands completed successfully
NovaCore 0000:e1:00.0: GSP RPC: receive: seq# 0, function=Ok(GspPostNoCat), length=0x50c
NovaCore 0000:e1:00.0: GSP RPC: receive: seq# 0, function=Ok(UcodeLibOsPrint), length=0x68
NovaCore 0000:e1:00.0: GSP RPC: receive: seq# 0, function=Ok(UcodeLibOsPrint), length=0x70
NovaCore 0000:e1:00.0: GSP RPC: receive: seq# 0, function=Ok(GspInitDone), length=0x50
NovaCore 0000:e1:00.0: GSP RPC: send: seq# 2, function=GET_GSP_STATIC_INFO, length=0x6c8
NovaCore 0000:e1:00.0: GSP RPC: receive: seq# 0, function=Ok(GetGspStaticInfo), length=0x6c8
NovaCore 0000:e1:00.0: GPU name: NVIDIA RTX A4000

Beautiful!

It is so great to finally see this emitted from a driver built from top of tree
drm-rust-next, at last. :)

thanks,
-- 
John Hubbard