linux-kernel - Re: [PATCH v6 00/24] nova-core: run FWSEC-FRTS to perform first stage of GSP initialization

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Message-ID: <324c842b-e110-4e15-b058-9238a9ee598a@kernel.org>
Date: Mon, 30 Jun 2025 17:43:44 +0200
From: Danilo Krummrich <dakr@...nel.org>
To: Alexandre Courbot <acourbot@...dia.com>
Cc: 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>,
 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>,
 Benno Lossin <lossin@...nel.org>, John Hubbard <jhubbard@...dia.com>,
 Ben Skeggs <bskeggs@...dia.com>, Joel Fernandes <joelagnelf@...dia.com>,
 Timur Tabi <ttabi@...dia.com>, Alistair Popple <apopple@...dia.com>,
 linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org,
 nouveau@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
 Lyude Paul <lyude@...hat.com>, Shirish Baskaran <sbaskaran@...dia.com>
Subject: Re: [PATCH v6 00/24] nova-core: run FWSEC-FRTS to perform first stage
 of GSP initialization

On 6/24/25 4:56 AM, Alexandre Courbot wrote:
> On Tue Jun 24, 2025 at 6:01 AM JST, Danilo Krummrich wrote:
>> There's one thing that would be nice to fix subsequently, which is properly
>> resetting the GPU. Currently, it needs a power cycle to be able to probe
>> successfully after unbinding the driver.
> 
> Yes, what I usually do is the following after unloading Nova:
> 
>      echo 1 | sudo tee /sys/bus/pci/devices/0000:01:00.0/reset
> 
> and this allows it to probe again. Maybe we want to add some equivalent
> programmatically in the driver probe function?

Probably -- how are things implemented on the GPU side of things? Is the GPU
firmware surviving a FLR?