linux-kernel - [PATCH RFC v6 07/26] nova-core: Add BAR1 aperture type and size constant

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Message-Id: <20260120204303.3229303-8-joelagnelf@nvidia.com>
Date: Tue, 20 Jan 2026 15:42:44 -0500
From: Joel Fernandes <joelagnelf@...dia.com>
To: linux-kernel@...r.kernel.org
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	Joel Fernandes <joelagnelf@...dia.com>
Subject: [PATCH RFC v6 07/26] nova-core: Add BAR1 aperture type and size constant

Add BAR1_SIZE constant and Bar1 type alias for the 256MB BAR1 aperture.
These are prerequisites for BAR1 memory access functionality.

Signed-off-by: Joel Fernandes <joelagnelf@...dia.com>
---
 drivers/gpu/nova-core/driver.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/nova-core/driver.rs b/drivers/gpu/nova-core/driver.rs
index 5a4cc047bcfc..d8b2e967ba4c 100644
--- a/drivers/gpu/nova-core/driver.rs
+++ b/drivers/gpu/nova-core/driver.rs
@@ -13,7 +13,10 @@
         Vendor, //
     },
     prelude::*,
-    sizes::SZ_16M,
+    sizes::{
+        SZ_16M,
+        SZ_256M, //
+    },
     sync::Arc, //
 };
 
@@ -28,6 +31,7 @@ pub(crate) struct NovaCore {
 }
 
 const BAR0_SIZE: usize = SZ_16M;
+pub(crate) const BAR1_SIZE: usize = SZ_256M;
 
 // For now we only support Ampere which can use up to 47-bit DMA addresses.
 //
@@ -38,6 +42,7 @@ pub(crate) struct NovaCore {
 const GPU_DMA_BITS: u32 = 47;
 
 pub(crate) type Bar0 = pci::Bar<BAR0_SIZE>;
+pub(crate) type Bar1 = pci::Bar<BAR1_SIZE>;
 
 kernel::pci_device_table!(
     PCI_TABLE,
-- 
2.34.1