linux-kernel - [PATCH v5 10/23] gpu: nova-core: increase BAR0 size to 16MB

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Message-Id: <20250612-nova-frts-v5-10-14ba7eaf166b@nvidia.com>
Date: Thu, 12 Jun 2025 23:01:38 +0900
From: Alexandre Courbot <acourbot@...dia.com>
To: Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
 Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
 Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
 Andreas Hindborg <a.hindborg@...nel.org>, Alice Ryhl <aliceryhl@...gle.com>, 
 Trevor Gross <tmgross@...ch.edu>, Danilo Krummrich <dakr@...nel.org>, 
 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>, 
 Benno Lossin <lossin@...nel.org>
Cc: John Hubbard <jhubbard@...dia.com>, Ben Skeggs <bskeggs@...dia.com>, 
 Joel Fernandes <joelagnelf@...dia.com>, Timur Tabi <ttabi@...dia.com>, 
 Alistair Popple <apopple@...dia.com>, linux-kernel@...r.kernel.org, 
 rust-for-linux@...r.kernel.org, nouveau@...ts.freedesktop.org, 
 dri-devel@...ts.freedesktop.org, Alexandre Courbot <acourbot@...dia.com>
Subject: [PATCH v5 10/23] gpu: nova-core: increase BAR0 size to 16MB

The Turing+ register address space spans over that range, so increase it
as future patches will access more registers.

Signed-off-by: Alexandre Courbot <acourbot@...dia.com>
---
 drivers/gpu/nova-core/driver.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/nova-core/driver.rs b/drivers/gpu/nova-core/driver.rs
index 8c86101c26cb5fe5eb9a3d03268338c6b58baef7..ffe25c7a2fdad289549460f7fd87d6e09299a35c 100644
--- a/drivers/gpu/nova-core/driver.rs
+++ b/drivers/gpu/nova-core/driver.rs
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 
-use kernel::{auxiliary, bindings, c_str, device::Core, pci, prelude::*};
+use kernel::{auxiliary, bindings, c_str, device::Core, pci, prelude::*, sizes::SZ_16M};
 
 use crate::gpu::Gpu;
 
@@ -11,7 +11,7 @@ pub(crate) struct NovaCore {
     _reg: auxiliary::Registration,
 }
 
-const BAR0_SIZE: usize = 8;
+const BAR0_SIZE: usize = SZ_16M;
 pub(crate) type Bar0 = pci::Bar<BAR0_SIZE>;
 
 kernel::pci_device_table!(

-- 
2.49.0