linux-kernel - [PATCH 13/31] gpu: nova-core: Hopper/Blackwell: add FMC firmware image, in support of FSP

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Message-ID: <20251203055923.1247681-14-jhubbard@nvidia.com>
Date: Tue,  2 Dec 2025 21:59:05 -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 13/31] gpu: nova-core: Hopper/Blackwell: add FMC firmware image, in support of FSP

FSP is a hardware unit that runs FMC firmware.

Co-developed-by: Alexandre Courbot <acourbot@...dia.com>
Signed-off-by: Alexandre Courbot <acourbot@...dia.com>
Signed-off-by: John Hubbard <jhubbard@...dia.com>
---
 drivers/gpu/nova-core/firmware.rs     |  1 +
 drivers/gpu/nova-core/firmware/fsp.rs | 44 +++++++++++++++++++++++++++
 2 files changed, 45 insertions(+)
 create mode 100644 drivers/gpu/nova-core/firmware/fsp.rs

diff --git a/drivers/gpu/nova-core/firmware.rs b/drivers/gpu/nova-core/firmware.rs
index e45b91bb45a3..5cbb8be7434f 100644
--- a/drivers/gpu/nova-core/firmware.rs
+++ b/drivers/gpu/nova-core/firmware.rs
@@ -24,6 +24,7 @@
 };
 
 pub(crate) mod booter;
+pub(crate) mod fsp;
 pub(crate) mod fwsec;
 pub(crate) mod gsp;
 pub(crate) mod riscv;
diff --git a/drivers/gpu/nova-core/firmware/fsp.rs b/drivers/gpu/nova-core/firmware/fsp.rs
new file mode 100644
index 000000000000..80401b964488
--- /dev/null
+++ b/drivers/gpu/nova-core/firmware/fsp.rs
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0
+
+//! FSP is a hardware unit that runs FMC firmware.
+
+use kernel::{
+    device,
+    prelude::*, //
+};
+
+use crate::{
+    dma::DmaObject,
+    firmware::elf,
+    gpu::Chipset, //
+};
+
+#[expect(unused)]
+pub(crate) struct FspFirmware {
+    /// FMC firmware image data (only the .image section)
+    fmc_image: DmaObject,
+    /// Full FMC ELF data (for signature extraction)
+    fmc_full: DmaObject,
+}
+
+impl FspFirmware {
+    #[expect(unused)]
+    pub(crate) fn new(
+        dev: &device::Device<device::Bound>,
+        chipset: Chipset,
+        ver: &str,
+    ) -> Result<Self> {
+        let fw = super::request_firmware(dev, chipset, "fmc", ver)?;
+
+        // FSP expects only the .image section, not the entire ELF file
+        let fmc_image_data = elf::elf_section(fw.data(), "image").ok_or_else(|| {
+            dev_err!(dev, "FMC ELF file missing 'image' section\n");
+            EINVAL
+        })?;
+
+        Ok(Self {
+            fmc_image: DmaObject::from_data(dev, fmc_image_data)?,
+            fmc_full: DmaObject::from_data(dev, fw.data())?,
+        })
+    }
+}
-- 
2.52.0