[0/2] Nova DRM skeleton driver

Message

Danilo Krummrich March 25, 2025, 11:21 p.m. UTC

This patch series adds the nova-drm skeleton driver.

nova-drm is connected to nova-core through the auxiliary bus and implements the
DRM parts of the nova driver stack.

For now, it implements the fundamental DRM abstractions, i.e. creates a DRM
device and registers it, exposing a three sample IOCTLs.

  DRM_IOCTL_NOVA_GETPARAM
    - provides the PCI bar size from the bar that maps the GPUs VRAM from
      nova-core

  DRM_IOCTL_NOVA_GEM_CREATE
    - creates a new dummy DRM GEM object and returns a handle

  DRM_IOCTL_NOVA_GEM_INFO
    - provides metadata for the DRM GEM object behinda given handle

I implemented a small userspace test suite [1] that utilizes this
interface.

This patch series depends on the auxiliary bus abstractions [2] and the DRM
abstractions [3]; the patches from this series are also in [4].

[1] https://gitlab.freedesktop.org/dakr/drm-test
[2] https://web.git.kernel.org/pub/scm/linux/kernel/git/dakr/linux.git/log/?h=rust/auxiliary
[3] https://gitlab.freedesktop.org/drm/misc/kernel/-/tree/topic/rust-drm
[4] https://gitlab.freedesktop.org/drm/nova/-/tree/staging/nova-drm

Danilo Krummrich (2):
  gpu: nova-core: register auxiliary device for nova-drm
  drm: nova-drm: add initial driver skeleton

 MAINTAINERS                        |  12 ++++
 drivers/gpu/drm/Kconfig            |   2 +
 drivers/gpu/drm/Makefile           |   1 +
 drivers/gpu/drm/nova/Kconfig       |  14 ++++
 drivers/gpu/drm/nova/Makefile      |   3 +
 drivers/gpu/drm/nova/driver.rs     |  70 ++++++++++++++++++++
 drivers/gpu/drm/nova/file.rs       |  68 +++++++++++++++++++
 drivers/gpu/drm/nova/gem.rs        |  49 ++++++++++++++
 drivers/gpu/drm/nova/nova.rs       |  17 +++++
 drivers/gpu/nova-core/Kconfig      |   1 +
 drivers/gpu/nova-core/driver.rs    |   9 ++-
 drivers/gpu/nova-core/nova_core.rs |   2 +
 include/uapi/drm/nova_drm.h        | 101 +++++++++++++++++++++++++++++
 rust/uapi/uapi_helper.h            |   1 +
 14 files changed, 349 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpu/drm/nova/Kconfig
 create mode 100644 drivers/gpu/drm/nova/Makefile
 create mode 100644 drivers/gpu/drm/nova/driver.rs
 create mode 100644 drivers/gpu/drm/nova/file.rs
 create mode 100644 drivers/gpu/drm/nova/gem.rs
 create mode 100644 drivers/gpu/drm/nova/nova.rs
 create mode 100644 include/uapi/drm/nova_drm.h