[0/8] DRM Rust abstractions

Message

Danilo Krummrich March 25, 2025, 11:54 p.m. UTC

This is the series for the initial DRM Rust abstractions, including DRM device /
driver, IOCTL, File and GEM object abstractions.

This series has been posted previously, however this is a long time ago and I
reworked a lot of things quite heavily. Hence, I decided to post this as a whole
new series.

Besides the rework, I want to credit Lina for her initial work, which this
series is based on.

In a private mail Lina told me to "feel free to take anything that's useful
from my past patch submissions or the downstream branches and use it/submit it
in any way".

@Lina: If you, however, feel uncomfortable with any of the Co-developed-by:
tags, due to the major changes, please let me know.

Those changes include:
  - switch to the subclassing pattern for DRM device
  - rework of the GEM object abstraction; dropping the custom reference types in
    favor of AlwaysRefCounted
  - rework of the File abstractions
  - rework of the driver registration
  - lots of minor changes (e.g. to better align with existing abstractions)

This patch series is also available in [1]; an example usage from nova-drm can
be found in [2] and [3].

[1] https://gitlab.freedesktop.org/drm/misc/kernel/-/tree/topic/rust-drm
[2] https://lore.kernel.org/nouveau/[e-mail]/
[3] https://gitlab.freedesktop.org/drm/nova/-/tree/staging/nova-drm

Asahi Lina (1):
  rust: drm: ioctl: Add DRM ioctl abstraction

Danilo Krummrich (7):
  drm: drv: implement __drm_dev_alloc()
  rust: drm: add driver abstractions
  rust: drm: add device abstraction
  rust: drm: add DRM driver registration
  rust: drm: file: Add File abstraction
  rust: drm: gem: Add GEM object abstraction
  MAINTAINERS: add DRM Rust source files to DRM DRIVERS

 MAINTAINERS                     |   1 +
 drivers/gpu/drm/drm_drv.c       |  58 ++++--
 include/drm/drm_drv.h           |   5 +
 rust/bindings/bindings_helper.h |   6 +
 rust/helpers/drm.c              |  19 ++
 rust/helpers/helpers.c          |   1 +
 rust/kernel/drm/device.rs       | 195 +++++++++++++++++++
 rust/kernel/drm/driver.rs       | 194 +++++++++++++++++++
 rust/kernel/drm/file.rs         |  99 ++++++++++
 rust/kernel/drm/gem/mod.rs      | 321 ++++++++++++++++++++++++++++++++
 rust/kernel/drm/ioctl.rs        | 159 ++++++++++++++++
 rust/kernel/drm/mod.rs          |  19 ++
 rust/kernel/lib.rs              |   2 +
 rust/uapi/uapi_helper.h         |   1 +
 14 files changed, 1064 insertions(+), 16 deletions(-)
 create mode 100644 rust/helpers/drm.c
 create mode 100644 rust/kernel/drm/device.rs
 create mode 100644 rust/kernel/drm/driver.rs
 create mode 100644 rust/kernel/drm/file.rs
 create mode 100644 rust/kernel/drm/gem/mod.rs
 create mode 100644 rust/kernel/drm/ioctl.rs
 create mode 100644 rust/kernel/drm/mod.rs