gpu: nova-core: Hopper/Blackwell: skip GFW boot waiting

Hopper and Blackwell GPUs use FSP-based secure boot and do not
require waiting for GFW_BOOT completion. Add a Gh100 GPU HAL that
returns Ok(()) for wait_gfw_boot_completion(), and route Hopper
and Blackwell architectures to it.

Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Link: https://patch.msgid.link/20260411024953.473149-8-jhubbard@nvidia.com
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>

diff --git a/drivers/gpu/nova-core/gpu/hal.rs b/drivers/gpu/nova-core/gpu/hal.rs
index a261c6af92beebdca381fe75ee2e7d9840c51732..788de20ab5d3b24fe59b90cd778cebf86b247d2a 100644 (file)
--- a/drivers/gpu/nova-core/gpu/hal.rs
+++ b/drivers/gpu/nova-core/gpu/hal.rs
@@ -10,6 +10,7 @@ use crate::{
     },
 };
 
+mod gh100;
 mod tu102;
 
 pub(crate) trait GpuHal {
@@ -19,11 +20,9 @@ pub(crate) trait GpuHal {
 
 pub(super) fn gpu_hal(chipset: Chipset) -> &'static dyn GpuHal {
     match chipset.arch() {
-        Architecture::Turing
-        | Architecture::Ampere
-        | Architecture::Ada
-        | Architecture::Hopper
-        | Architecture::BlackwellGB10x
-        | Architecture::BlackwellGB20x => tu102::TU102_HAL,
+        Architecture::Turing | Architecture::Ampere | Architecture::Ada => tu102::TU102_HAL,
+        Architecture::Hopper | Architecture::BlackwellGB10x | Architecture::BlackwellGB20x => {
+            gh100::GH100_HAL
+        }
     }
 }

diff --git a/drivers/gpu/nova-core/gpu/hal/gh100.rs b/drivers/gpu/nova-core/gpu/hal/gh100.rs
new file mode 100644 (file)
index 0000000..1ed5bcc
--- /dev/null
+++ b/drivers/gpu/nova-core/gpu/hal/gh100.rs
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0
+
+use kernel::prelude::*;
+
+use crate::driver::Bar0;
+
+use super::GpuHal;
+
+struct Gh100;
+
+impl GpuHal for Gh100 {
+    fn wait_gfw_boot_completion(&self, _bar: &Bar0) -> Result {
+        Ok(())
+    }
+}
+
+const GH100: Gh100 = Gh100;
+pub(super) const GH100_HAL: &dyn GpuHal = &GH100;