[PATCH v6 4/7] gpu: nova-core: refactor SEC2 booter loading into BooterFirmware::run()

[Alexandre Courbot <acourbot@nvidia.com>]

From: John Hubbard <jhubbard@nvidia.com>

Move the SEC2 reset/load/boot sequence into a BooterFirmware::run()
method This is mostly refactoring, with no significant behavior change,
done in preparation for adding an alternative FSP boot path.

Suggested-by: Danilo Krummrich <dakr@kernel.org>
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Co-developed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Eliot Courtney <ecourtney@nvidia.com>
---
 drivers/gpu/nova-core/firmware/booter.rs | 31 +++++++++++++++++++++++++++++++
 drivers/gpu/nova-core/gsp/boot.rs        | 30 ++++++++----------------------
 2 files changed, 39 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/nova-core/firmware/booter.rs b/drivers/gpu/nova-core/firmware/booter.rs
index de2a4536b532..e45e5dc8d5d2 100644
--- a/drivers/gpu/nova-core/firmware/booter.rs
+++ b/drivers/gpu/nova-core/firmware/booter.rs
@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
+// SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 
 //! Support for loading and patching the `Booter` firmware. `Booter` is a Heavy Secured firmware
 //! running on [`Sec2`], that is used on Turing/Ampere to load the GSP firmware into the GSP falcon
@@ -8,6 +9,7 @@
 
 use kernel::{
     device,
+    dma::Coherent,
     prelude::*,
     transmute::FromBytes, //
 };
@@ -396,6 +398,35 @@ pub(crate) fn new(
             ucode: ucode_signed,
         })
     }
+
+    /// Load and run the booter firmware on SEC2.
+    ///
+    /// Resets SEC2, loads this firmware image, then boots with the WPR metadata
+    /// address passed via the SEC2 mailboxes.
+    pub(crate) fn run<T>(
+        &self,
+        dev: &device::Device<device::Bound>,
+        bar: &Bar0,
+        sec2_falcon: &Falcon<Sec2>,
+        wpr_meta: &Coherent<T>,
+    ) -> Result {
+        sec2_falcon.reset(bar)?;
+        sec2_falcon.load(dev, bar, self)?;
+        let wpr_handle = wpr_meta.dma_handle();
+        let (mbox0, mbox1) = sec2_falcon.boot(
+            bar,
+            Some(wpr_handle as u32),
+            Some((wpr_handle >> 32) as u32),
+        )?;
+        dev_dbg!(dev, "SEC2 MBOX0: {:#x}, MBOX1: {:#x}\n", mbox0, mbox1);
+
+        if mbox0 != 0 {
+            dev_err!(dev, "Booter-load failed with error {:#x}\n", mbox0);
+            return Err(ENODEV);
+        }
+
+        Ok(())
+    }
 }
 
 impl FalconDmaLoadable for BooterFirmware {
diff --git a/drivers/gpu/nova-core/gsp/boot.rs b/drivers/gpu/nova-core/gsp/boot.rs
index c123080148f1..4f654e10259a 100644
--- a/drivers/gpu/nova-core/gsp/boot.rs
+++ b/drivers/gpu/nova-core/gsp/boot.rs
@@ -174,15 +174,6 @@ pub(crate) fn boot(
             Self::run_fwsec_frts(dev, chipset, gsp_falcon, bar, &bios, &fb_layout)?;
         }
 
-        let booter_loader = BooterFirmware::new(
-            dev,
-            BooterKind::Loader,
-            chipset,
-            FIRMWARE_VERSION,
-            sec2_falcon,
-            bar,
-        )?;
-
         let wpr_meta = Coherent::init(dev, GFP_KERNEL, GspFwWprMeta::new(&gsp_fw, &fb_layout))?;
 
         self.cmdq
@@ -204,20 +195,15 @@ pub(crate) fn boot(
             "Using SEC2 to load and run the booter_load firmware...\n"
         );
 
-        sec2_falcon.reset(bar)?;
-        sec2_falcon.load(dev, bar, &booter_loader)?;
-        let wpr_handle = wpr_meta.dma_handle();
-        let (mbox0, mbox1) = sec2_falcon.boot(
+        BooterFirmware::new(
+            dev,
+            BooterKind::Loader,
+            chipset,
+            FIRMWARE_VERSION,
+            sec2_falcon,
             bar,
-            Some(wpr_handle as u32),
-            Some((wpr_handle >> 32) as u32),
-        )?;
-        dev_dbg!(pdev, "SEC2 MBOX0: {:#x}, MBOX1: {:#x}\n", mbox0, mbox1);
-
-        if mbox0 != 0 {
-            dev_err!(pdev, "Booter-load failed with error {:#x}\n", mbox0);
-            return Err(ENODEV);
-        }
+        )?
+        .run(dev, bar, sec2_falcon, &wpr_meta)?;
 
         gsp_falcon.write_os_version(bar, gsp_fw.bootloader.app_version);
 

-- 
2.54.0