linux-kernel - [PATCH v6 10/11] gpu: nova-core: Add base files for r570.144 firmware bindings

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Message-Id: <20250913-nova_firmware-v6-10-9007079548b0@nvidia.com>
Date: Sat, 13 Sep 2025 23:12:23 +0900
From: Alexandre Courbot <acourbot@...dia.com>
To: 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>, 
 Danilo Krummrich <dakr@...nel.org>, 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>
Cc: John Hubbard <jhubbard@...dia.com>, 
 Alistair Popple <apopple@...dia.com>, 
 Joel Fernandes <joelagnelf@...dia.com>, Timur Tabi <ttabi@...dia.com>, 
 rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org, 
 nouveau@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, 
 Alexandre Courbot <acourbot@...dia.com>
Subject: [PATCH v6 10/11] gpu: nova-core: Add base files for r570.144
 firmware bindings

From: Alistair Popple <apopple@...dia.com>

Interacting with the GSP currently requires using definitions from C
header files. Rust definitions for the types needed for Nova core will
be generated using the Rust bindgen tool. This patch adds the base
module to allow inclusion of the generated bindings. The generated
bindings themselves are added by subsequent patches when they are first
used.

Currently we only intend to support a single firmware version, 570.144,
with these bindings. Longer term we intend to move to a more stable GSP
interface that isn't tied to specific firmware versions.

Signed-off-by: Alistair Popple <apopple@...dia.com>
Reviewed-by: John Hubbard <jhubbard@...dia.com>
[acourbot@...dia.com: adapt the bindings module comment a bit]
Acked-by: Danilo Krummrich <dakr@...nel.org>
Signed-off-by: Alexandre Courbot <acourbot@...dia.com>
---
 drivers/gpu/nova-core/gsp.rs                      |  2 ++
 drivers/gpu/nova-core/gsp/fw.rs                   |  7 ++++++
 drivers/gpu/nova-core/gsp/fw/r570_144.rs          | 29 +++++++++++++++++++++++
 drivers/gpu/nova-core/gsp/fw/r570_144/bindings.rs |  1 +
 4 files changed, 39 insertions(+)

diff --git a/drivers/gpu/nova-core/gsp.rs b/drivers/gpu/nova-core/gsp.rs
index 917e8a83d2935325dd75d625cf4b7051ac08238a..64e472e7a9d3b3a600cbe45b5d18c2f12861750d 100644
--- a/drivers/gpu/nova-core/gsp.rs
+++ b/drivers/gpu/nova-core/gsp.rs
@@ -4,6 +4,8 @@
 
 use kernel::prelude::*;
 
+mod fw;
+
 pub(crate) const GSP_PAGE_SHIFT: usize = 12;
 pub(crate) const GSP_PAGE_SIZE: usize = 1 << GSP_PAGE_SHIFT;
 
diff --git a/drivers/gpu/nova-core/gsp/fw.rs b/drivers/gpu/nova-core/gsp/fw.rs
new file mode 100644
index 0000000000000000000000000000000000000000..34226dd009824c1e44d0cb2e37b43434a364e433
--- /dev/null
+++ b/drivers/gpu/nova-core/gsp/fw.rs
@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
+
+mod r570_144;
+
+// Alias to avoid repeating the version number with every use.
+#[expect(unused)]
+use r570_144 as bindings;
diff --git a/drivers/gpu/nova-core/gsp/fw/r570_144.rs b/drivers/gpu/nova-core/gsp/fw/r570_144.rs
new file mode 100644
index 0000000000000000000000000000000000000000..35cb0370a7c9b4604393931f9f3bf72ef4a794b4
--- /dev/null
+++ b/drivers/gpu/nova-core/gsp/fw/r570_144.rs
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0
+
+//! Firmware bindings.
+//!
+//! Imports the generated bindings by `bindgen`.
+//!
+//! This module may not be directly used. Please abstract or re-export the needed symbols in the
+//! parent module instead.
+
+#![cfg_attr(test, allow(deref_nullptr))]
+#![cfg_attr(test, allow(unaligned_references))]
+#![cfg_attr(test, allow(unsafe_op_in_unsafe_fn))]
+#![allow(
+    dead_code,
+    unused_imports,
+    clippy::all,
+    clippy::undocumented_unsafe_blocks,
+    clippy::ptr_as_ptr,
+    clippy::ref_as_ptr,
+    missing_docs,
+    non_camel_case_types,
+    non_upper_case_globals,
+    non_snake_case,
+    improper_ctypes,
+    unreachable_pub,
+    unsafe_op_in_unsafe_fn
+)]
+use kernel::ffi;
+include!("r570_144/bindings.rs");
diff --git a/drivers/gpu/nova-core/gsp/fw/r570_144/bindings.rs b/drivers/gpu/nova-core/gsp/fw/r570_144/bindings.rs
new file mode 100644
index 0000000000000000000000000000000000000000..cec5940325151e407aa90128a35cb683afd436d7
--- /dev/null
+++ b/drivers/gpu/nova-core/gsp/fw/r570_144/bindings.rs
@@ -0,0 +1 @@
+// SPDX-License-Identifier: GPL-2.0

-- 
2.51.0