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drm/nova: Align GEM memory allocation to system page size

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Use page::page_align for GEM object memory allocation to ensure the
allocation is page aligned. This is important on systems where the
default page size is not 4k. Such as 16k or 64k aarch64 systems.

This change uses the updated page_align() function which returns
Option<usize> for overflow safety. (See "rust: Return Option from
page_align and ensure no usize overflow").

Signed-off-by: Brendan Shephard <bshephar@bne-home.net>
Link: https://patch.msgid.link/20251215083416.266469-1-bshephar@bne-home.net
[ Import page module only. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
This commit is contained in:
Brendan Shephard 2025-12-15 18:34:16 +10:00 committed by Danilo Krummrich
parent f91ffed95c
commit 255153afbc
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/nova/gem.rs
View File

@ -3,6 +3,7 @@
use kernel::{
drm,
drm::{gem, gem::BaseObject},
page,
prelude::*,
sync::aref::ARef,
};
@ -27,11 +28,10 @@ fn new(_dev: &NovaDevice, _size: usize) -> impl PinInit<Self, Error> {
impl NovaObject {
/// Create a new DRM GEM object.
pub(crate) fn new(dev: &NovaDevice, size: usize) -> Result<ARef<gem::Object<Self>>> {
let aligned_size = size.next_multiple_of(1 << 12);
if size == 0 || size > aligned_size {
if size == 0 {
return Err(EINVAL);
}
let aligned_size = page::page_align(size).ok_or(EINVAL)?;
gem::Object::new(dev, aligned_size)
}