gpu: nova-core: gsp: Add support for checking if GSP reloaded

During the sequencer process, we need to check if GSP was successfully
reloaded. Add functionality to check for the same.

Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Message-ID: <20251114195552.739371-6-joelagnelf@nvidia.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/gpu/nova-core/falcon/gsp.rs b/drivers/gpu/nova-core/falcon/gsp.rs
index 93d4eca65631..9ef1fbae141f 100644
--- a/drivers/gpu/nova-core/falcon/gsp.rs
+++ b/drivers/gpu/nova-core/falcon/gsp.rs
@@ -1,5 +1,11 @@
 // SPDX-License-Identifier: GPL-2.0
 
+use kernel::{
+    io::poll::read_poll_timeout,
+    prelude::*,
+    time::Delta, //
+};
+
 use crate::{
     driver::Bar0,
     falcon::{
@@ -37,4 +43,16 @@ impl Falcon<Gsp> {
             .set_swgen0(true)
             .write(bar, &Gsp::ID);
     }
+
+    /// Checks if GSP reload/resume has completed during the boot process.
+    #[expect(dead_code)]
+    pub(crate) fn check_reload_completed(&self, bar: &Bar0, timeout: Delta) -> Result<bool> {
+        read_poll_timeout(
+            || Ok(regs::NV_PGC6_BSI_SECURE_SCRATCH_14::read(bar)),
+            |val| val.boot_stage_3_handoff(),
+            Delta::ZERO,
+            timeout,
+        )
+        .map(|_| true)
+    }
 }