[PATCH v11 10/22] gpu: nova-core: Hopper/Blackwell: add FSP falcon engine stub

[John Hubbard]

Add the FSP (Firmware System Processor) falcon engine type that will
handle secure boot and Chain of Trust operations on Hopper and Blackwell
architectures.

The FSP falcon replaces SEC2's role in the boot sequence for these newer
architectures. This initial stub just defines the falcon type and its
base address.

Signed-off-by: John Hubbard <jhubbard@xxxxxxxxxx>
---
 drivers/gpu/nova-core/falcon.rs        |  1 +
 drivers/gpu/nova-core/falcon/fsp.rs    | 28 ++++++++++++++++++++++++++
 drivers/gpu/nova-core/gsp/hal/gh100.rs |  7 +++++--
 3 files changed, 34 insertions(+), 2 deletions(-)
 create mode 100644 drivers/gpu/nova-core/falcon/fsp.rs

diff --git a/drivers/gpu/nova-core/falcon.rs b/drivers/gpu/nova-core/falcon.rs
index 24cc2c26e28d..053ce5bea6cd 100644
--- a/drivers/gpu/nova-core/falcon.rs
+++ b/drivers/gpu/nova-core/falcon.rs
@@ -40,6 +40,7 @@
     regs,
 };
 
+pub(crate) mod fsp;
 pub(crate) mod gsp;
 mod hal;
 pub(crate) mod sec2;
diff --git a/drivers/gpu/nova-core/falcon/fsp.rs b/drivers/gpu/nova-core/falcon/fsp.rs
new file mode 100644
index 000000000000..73fb73cb73a5
--- /dev/null
+++ b/drivers/gpu/nova-core/falcon/fsp.rs
@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: GPL-2.0
+// SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+
+//! FSP (Firmware System Processor) falcon engine for Hopper/Blackwell GPUs.
+//!
+//! The FSP falcon handles secure boot and Chain of Trust operations
+//! on Hopper and Blackwell architectures, replacing SEC2's role.
+
+use kernel::io::register::RegisterBase;
+
+use crate::falcon::{
+    FalconEngine,
+    PFalcon2Base,
+    PFalconBase, //
+};
+
+/// Type specifying the `Fsp` falcon engine. Cannot be instantiated.
+pub(crate) struct Fsp(());
+
+impl RegisterBase<PFalconBase> for Fsp {
+    const BASE: usize = 0x8f2000;
+}
+
+impl RegisterBase<PFalcon2Base> for Fsp {
+    const BASE: usize = 0x8f3000;
+}
+
+impl FalconEngine for Fsp {}
diff --git a/drivers/gpu/nova-core/gsp/hal/gh100.rs b/drivers/gpu/nova-core/gsp/hal/gh100.rs
index 9a4bb22578b3..fe2689764c8d 100644
--- a/drivers/gpu/nova-core/gsp/hal/gh100.rs
+++ b/drivers/gpu/nova-core/gsp/hal/gh100.rs
@@ -11,6 +11,7 @@
 use crate::{
     driver::Bar0,
     falcon::{
+        fsp::Fsp as FspEngine,
         gsp::Gsp as GspEngine,
         sec2::Sec2,
         Falcon, //
@@ -35,14 +36,16 @@ impl GspHal for Gh100 {
     fn boot<'a>(
         &self,
         _gsp: &'a Gsp,
-        _dev: &'a device::Device<device::Bound>,
+        dev: &'a device::Device<device::Bound>,
         _bar: &'a Bar0,
-        _chipset: Chipset,
+        chipset: Chipset,
         _fb_layout: &FbLayout,
         _wpr_meta: &Coherent<GspFwWprMeta>,
         _gsp_falcon: &'a Falcon<GspEngine>,
         _sec2_falcon: &'a Falcon<Sec2>,
     ) -> Result<BootUnloadGuard<'a>> {
+        let _fsp_falcon = Falcon::<FspEngine>::new(dev, chipset)?;
+
         Err(ENOTSUPP)
     }
 }
-- 
2.54.0