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

Joel Fernandes
2026-01-20T20:43:56Z

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@nvidia.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