drivers/gpu/drm/nova/gem.rs
Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nova/gem.rs
File Facts
- System
- Linux kernel
- Corpus path
drivers/gpu/drm/nova/gem.rs- Extension
.rs- Size
- 1277 bytes
- Lines
- 56
- Domain
- Driver Families
- Bucket
- drivers/gpu
- Inferred role
- Driver Families: implementation source
- Status
- source implementation candidate
Why This File Exists
Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0
use kernel::{
drm,
drm::{gem, gem::BaseObject, DeviceContext},
page,
prelude::*,
sync::aref::ARef,
};
use crate::{
driver::{NovaDevice, NovaDriver},
file::File,
};
/// GEM Object inner driver data
#[pin_data]
pub(crate) struct NovaObject {}
impl gem::DriverObject for NovaObject {
type Driver = NovaDriver;
type Args = ();
fn new<Ctx: DeviceContext>(
_dev: &NovaDevice<Ctx>,
_size: usize,
_args: Self::Args,
) -> impl PinInit<Self, Error> {
try_pin_init!(NovaObject {})
}
}
impl NovaObject {
/// Create a new DRM GEM object.
pub(crate) fn new<Ctx: DeviceContext>(
dev: &NovaDevice<Ctx>,
size: usize,
) -> Result<ARef<gem::Object<Self, Ctx>>> {
if size == 0 {
return Err(EINVAL);
}
let aligned_size = page::page_align(size).ok_or(EINVAL)?;
gem::Object::<Self, Ctx>::new(dev, aligned_size, ())
}
/// Look up a GEM object handle for a `File` and return an `ObjectRef` for it.
#[inline]
pub(crate) fn lookup_handle(
file: &drm::File<File>,
handle: u32,
) -> Result<ARef<gem::Object<Self>>> {
gem::Object::lookup_handle(file, handle)
}
}
Annotation
- Atlas domain: Driver Families / drivers/gpu.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.