[PATCH v10 15/28] gpu: nova-core: Hopper/Blackwell: add FSP falcon engine stub

[John Hubbard <jhubbard@nvidia.com>]

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@nvidia.com>
---
 drivers/gpu/nova-core/falcon.rs     |  1 +
 drivers/gpu/nova-core/falcon/fsp.rs | 27 +++++++++++++++++++++++++++
 drivers/gpu/nova-core/gsp/boot.rs   |  7 +++++--
 3 files changed, 33 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..57817a594631
--- /dev/null
+++ b/drivers/gpu/nova-core/falcon/fsp.rs
@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-2.0
+
+//! 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/boot.rs b/drivers/gpu/nova-core/gsp/boot.rs
index 88c7d2106052..84943beee9ca 100644
--- a/drivers/gpu/nova-core/gsp/boot.rs
+++ b/drivers/gpu/nova-core/gsp/boot.rs
@@ -13,6 +13,7 @@
 use crate::{
     driver::Bar0,
     falcon::{
+        fsp::Fsp as FspEngine,
         gsp::Gsp,
         sec2::Sec2,
         Falcon, //
@@ -196,13 +197,15 @@ fn boot_via_sec2(
     /// This path uses FSP to establish a chain of trust and boot GSP-FMC. FSP handles
     /// the GSP boot internally - no manual GSP reset/boot is needed.
     fn boot_via_fsp(
-        _dev: &device::Device<device::Bound>,
+        dev: &device::Device<device::Bound>,
         _bar: &Bar0,
-        _chipset: Chipset,
+        chipset: Chipset,
         _gsp_falcon: &Falcon<Gsp>,
         _wpr_meta: &Coherent<GspFwWprMeta>,
         _libos: &Coherent<[LibosMemoryRegionInitArgument]>,
     ) -> Result {
+        let _fsp_falcon = Falcon::<FspEngine>::new(dev, chipset)?;
+
         Err(ENOTSUPP)
     }
 
-- 
2.53.0