[PATCH v7 03/23] nova-core: Add BAR1 aperture type and size constant
From: Joel Fernandes <joelagnelf@nvidia.com>
Date: 2026-02-18 21:21:13
Also in:
amd-gfx, dri-devel, intel-gfx, intel-xe, linux-doc, linux-fbdev, lkml, nouveau
Subsystem:
core driver for nvidia gpus [rust], drm drivers, drm drivers and common infrastructure [rust], the rest · Maintainers:
Danilo Krummrich, Alexandre Courbot, David Airlie, Simona Vetter, Alice Ryhl, Linus Torvalds
Add BAR1_SIZE constant and Bar1 type alias for the 256MB BAR1 aperture. These are prerequisites for BAR1 memory access functionality. Cc: Nikola Djukic <redacted> 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