linux-kernel - [PATCH 15/17] nova-core: remove unnecessary need

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Message-Id: <20250829173254.2068763-16-joelagnelf@nvidia.com>
Date: Fri, 29 Aug 2025 13:32:52 -0400
From: Joel Fernandes <joelagnelf@...dia.com>
To: linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	dakr@...nel.org,
	acourbot@...dia.com
Cc: Alistair Popple <apopple@...dia.com>,
	Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Boqun Feng <boqun.feng@...il.com>,
	Gary Guo <gary@...yguo.net>,
	bjorn3_gh@...tonmail.com,
	Benno Lossin <lossin@...nel.org>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>,
	Trevor Gross <tmgross@...ch.edu>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	John Hubbard <jhubbard@...dia.com>,
	Joel Fernandes <joelagnelf@...dia.com>,
	Timur Tabi <ttabi@...dia.com>,
	joel@...lfernandes.org,
	nouveau@...ts.freedesktop.org,
	rust-for-linux@...r.kernel.org
Subject: [PATCH 15/17] nova-core: remove unnecessary need_riscv, bar parameters

From: John Hubbard <jhubbard@...dia.com>

The need_riscv parameter and its associated RISCV validation logic are
are actually unnecessary for correct operation. Remove it, along with
the now-unused bar parameter as well.

Signed-off-by: John Hubbard <jhubbard@...dia.com>
---
 drivers/gpu/nova-core/falcon.rs | 21 +--------------------
 drivers/gpu/nova-core/gpu.rs    |  9 ++-------
 2 files changed, 3 insertions(+), 27 deletions(-)

diff --git a/drivers/gpu/nova-core/falcon.rs b/drivers/gpu/nova-core/falcon.rs
index 023f9b575a5d..938f25b556a8 100644
--- a/drivers/gpu/nova-core/falcon.rs
+++ b/drivers/gpu/nova-core/falcon.rs
@@ -346,26 +346,7 @@ pub(crate) struct Falcon<E: FalconEngine> {
 
 impl<E: FalconEngine + 'static> Falcon<E> {
     /// Create a new falcon instance.
-    ///
-    /// `need_riscv` is set to `true` if the caller expects the falcon to be a dual falcon/riscv
-    /// controller.
-    pub(crate) fn new(
-        dev: &device::Device,
-        chipset: Chipset,
-        bar: &Bar0,
-        need_riscv: bool,
-    ) -> Result<Self> {
-        if need_riscv {
-            let hwcfg2 = regs::NV_PFALCON_FALCON_HWCFG2::read(bar, &E::ID);
-            if !hwcfg2.riscv() {
-                dev_err!(
-                    dev,
-                    "riscv support requested on a controller that does not support it\n"
-                );
-                return Err(EINVAL);
-            }
-        }
-
+    pub(crate) fn new(dev: &device::Device, chipset: Chipset) -> Result<Self> {
         Ok(Self {
             hal: hal::falcon_hal(chipset)?,
             dev: dev.into(),
diff --git a/drivers/gpu/nova-core/gpu.rs b/drivers/gpu/nova-core/gpu.rs
index bf670f6b6773..c2a9cb32837f 100644
--- a/drivers/gpu/nova-core/gpu.rs
+++ b/drivers/gpu/nova-core/gpu.rs
@@ -287,15 +287,10 @@ pub(crate) fn new(
 
         let sysmem_flush = SysmemFlush::register(pdev.as_ref(), bar, spec.chipset)?;
 
-        let gsp_falcon = Falcon::<Gsp>::new(
-            pdev.as_ref(),
-            spec.chipset,
-            bar,
-            spec.chipset > Chipset::GA100,
-        )?;
+        let gsp_falcon = Falcon::<Gsp>::new(pdev.as_ref(), spec.chipset)?;
         gsp_falcon.clear_swgen0_intr(bar);
 
-        let sec2_falcon = Falcon::<Sec2>::new(pdev.as_ref(), spec.chipset, bar, true)?;
+        let sec2_falcon = Falcon::<Sec2>::new(pdev.as_ref(), spec.chipset)?;
 
         let fw = Firmware::new(
             pdev.as_ref(),
-- 
2.34.1