linux-kernel - Re: [PATCH v2 00/12] nova-core: Complete GSP boot and begin RPC communication

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Message-ID: <3b0d776e50fc81797dec2e5d81c86390af78f848.camel@nvidia.com>
Date: Mon, 3 Nov 2025 19:12:03 +0000
From: Timur Tabi <ttabi@...dia.com>
To: "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>, Joel
 Fernandes <joelagnelf@...dia.com>, "dakr@...nel.org" <dakr@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Alexandre
 Courbot <acourbot@...dia.com>, "rust-for-linux@...r.kernel.org"
	<rust-for-linux@...r.kernel.org>
CC: "joel@...lfernandes.org" <joel@...lfernandes.org>, "lossin@...nel.org"
	<lossin@...nel.org>, "ojeda@...nel.org" <ojeda@...nel.org>,
	"boqun.feng@...il.com" <boqun.feng@...il.com>, "a.hindborg@...nel.org"
	<a.hindborg@...nel.org>, "simona@...ll.ch" <simona@...ll.ch>,
	"tmgross@...ch.edu" <tmgross@...ch.edu>, "alex.gaynor@...il.com"
	<alex.gaynor@...il.com>, "tzimmermann@...e.de" <tzimmermann@...e.de>,
	"mripard@...nel.org" <mripard@...nel.org>,
	"maarten.lankhorst@...ux.intel.com" <maarten.lankhorst@...ux.intel.com>,
	"nouveau@...ts.freedesktop.org" <nouveau@...ts.freedesktop.org>, John Hubbard
	<jhubbard@...dia.com>, "bjorn3_gh@...tonmail.com" <bjorn3_gh@...tonmail.com>,
	"airlied@...il.com" <airlied@...il.com>, "aliceryhl@...gle.com"
	<aliceryhl@...gle.com>, "gary@...yguo.net" <gary@...yguo.net>, Alistair
 Popple <apopple@...dia.com>
Subject: Re: [PATCH v2 00/12] nova-core: Complete GSP boot and begin RPC
 communication

On Sun, 2025-11-02 at 18:59 -0500, Joel Fernandes wrote:
> Hello!
> These patches a refresh of the series adding support for final stages of the
> GSP boot process where a sequencer which inteprets firmware instructions needs
> to run to boot the GSP processor, followed by waiting for an INIT_DONE message
> from the GSP.
> 
> The patches are based on Alex's github branch which have several prerequisites:
> Repo: https://github.com/Gnurou/linux.git Branch: b4/gsp_boot
> 
> I also dropped several patches (mainly from John that have already been
> applied).  Tested on Ampere GA102. We also need the "gpu: nova-core: Add
> get_gsp_info() command" patch which I dropped since it needs to be reworked,
> and it is not needed for GSP boot on Ampere (but John mentioned it is needed
> for Blackwell so we could include it in the Blackwell series or I can try to
> include it in this series if I'm respinning).

I applied your patches on top of Alex's tree, and when I boot on a GA102 I get this:

[  376.316679] NovaCore 0000:65:00.0: NVIDIA (Chipset: GA102, Architecture: Ampere, Revision: a.1)
[  377.188060] NovaCore 0000:65:00.0: GSP RPC: send: seq# 0, function=Ok(GspSetSystemInfo),
length=0x3f0
[  377.188070] NovaCore 0000:65:00.0: GSP RPC: send: seq# 1, function=Ok(SetRegistry), length=0xc5
[  378.315960] NovaCore 0000:65:00.0: GSP RPC: receive: seq# 0, function=NOCAT, length=0x50c
[  378.319875] NovaCore 0000:65:00.0: probe with driver NovaCore failed with error -34

Are you sure there are no other patches?  The RPC patches can't depend on INIT_DONE being the first
response.  Getting a NOCAT RPC first is not uncommon.