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Date: Mon, 30 Jun 2025 17:43:44 +0200
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Subject: Re: [PATCH v6 00/24] nova-core: run FWSEC-FRTS to perform first stage
 of GSP initialization
To: Alexandre Courbot <acourbot@nvidia.com>
Cc: Miguel Ojeda <ojeda@kernel.org>, Alex Gaynor <alex.gaynor@gmail.com>,
 Boqun Feng <boqun.feng@gmail.com>, Gary Guo <gary@garyguo.net>,
 =?UTF-8?Q?Bj=C3=B6rn_Roy_Baron?= <bjorn3_gh@protonmail.com>,
 Andreas Hindborg <a.hindborg@kernel.org>, Alice Ryhl <aliceryhl@google.com>,
 Trevor Gross <tmgross@umich.edu>, David Airlie <airlied@gmail.com>,
 Simona Vetter <simona@ffwll.ch>,
 Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
 Maxime Ripard <mripard@kernel.org>, Thomas Zimmermann <tzimmermann@suse.de>,
 Benno Lossin <lossin@kernel.org>, John Hubbard <jhubbard@nvidia.com>,
 Ben Skeggs <bskeggs@nvidia.com>, Joel Fernandes <joelagnelf@nvidia.com>,
 Timur Tabi <ttabi@nvidia.com>, Alistair Popple <apopple@nvidia.com>,
 linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org,
 nouveau@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
 Lyude Paul <lyude@redhat.com>, Shirish Baskaran <sbaskaran@nvidia.com>
References: <20250619-nova-frts-v6-0-ecf41ef99252@nvidia.com>
 <aFnArVIFkHCUzNqe@pollux> <DAUFC932W5MR.Q13BFD3CYEKJ@nvidia.com>
From: Danilo Krummrich <dakr@kernel.org>
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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?