linux-kernel - [PATCH 27/31] gpu: nova-core: Hopper/Blackwell: skip GFW boot waiting

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Message-ID: <20251203055923.1247681-28-jhubbard@nvidia.com>
Date: Tue,  2 Dec 2025 21:59:19 -0800
From: John Hubbard <jhubbard@...dia.com>
To: Danilo Krummrich <dakr@...nel.org>
Cc: Alexandre Courbot <acourbot@...dia.com>,
	Joel Fernandes <joelagnelf@...dia.com>,
	Timur Tabi <ttabi@...dia.com>,
	Alistair Popple <apopple@...dia.com>,
	Edwin Peer <epeer@...dia.com>,
	Zhi Wang <zhiw@...dia.com>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	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>,
	nouveau@...ts.freedesktop.org,
	rust-for-linux@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	John Hubbard <jhubbard@...dia.com>
Subject: [PATCH 27/31] gpu: nova-core: Hopper/Blackwell: skip GFW boot waiting

Hopper and Blackwell GPUs use FSP-based secure boot and do not require
waiting for GFW_BOOT completion. Skip this step for these architectures.

Signed-off-by: John Hubbard <jhubbard@...dia.com>
---
 drivers/gpu/nova-core/gpu.rs | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/nova-core/gpu.rs b/drivers/gpu/nova-core/gpu.rs
index 8fdce488612a..fe078547c9b3 100644
--- a/drivers/gpu/nova-core/gpu.rs
+++ b/drivers/gpu/nova-core/gpu.rs
@@ -320,8 +320,13 @@ pub(crate) fn new<'a>(
 
             // We must wait for GFW_BOOT completion before doing any significant setup on the GPU.
             _: {
-                gfw::wait_gfw_boot_completion(bar)
-                    .inspect_err(|_| dev_err!(pdev.as_ref(), "GFW boot did not complete"))?;
+                if matches!(
+                    spec.chipset.arch(),
+                    Architecture::Turing | Architecture::Ampere | Architecture::Ada
+                ) {
+                    gfw::wait_gfw_boot_completion(bar)
+                        .inspect_err(|_| dev_err!(pdev.as_ref(), "GFW boot did not complete"))?;
+                }
             },
 
             sysmem_flush: SysmemFlush::register(pdev.as_ref(), bar, spec.chipset)?,
-- 
2.52.0