From c284d3e423382be3591d5b1e402e330e6c3f726c Mon Sep 17 00:00:00 2001 From: Asahi Lina Date: Fri, 11 Apr 2025 01:55:26 +0200 Subject: rust: drm: gem: Add GEM object abstraction DRM GEM is the DRM memory management subsystem used by most modern drivers; add a Rust abstraction for DRM GEM. This includes the BaseObject trait, which contains operations shared by all GEM object classes. Signed-off-by: Asahi Lina Reviewed-by: Alyssa Rosenzweig Reviewed-by: Lyude Paul Link: https://lore.kernel.org/r/20250410235546.43736-8-dakr@kernel.org [ Rework of GEM object abstractions * switch to the Opaque type * fix (mutable) references to struct drm_gem_object (which in this context is UB) * drop all custom reference types in favor of AlwaysRefCounted * bunch of minor changes and simplifications (e.g. IntoGEMObject trait) * write and fix safety and invariant comments * remove necessity for and convert 'as' casts * original source archive: https://archive.is/dD5SL - Danilo ] [ Fix missing CONFIG_DRM guards in rust/helpers/drm.c. - Danilo ] Signed-off-by: Danilo Krummrich --- rust/helpers/drm.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 rust/helpers/drm.c (limited to 'rust/helpers/drm.c') diff --git a/rust/helpers/drm.c b/rust/helpers/drm.c new file mode 100644 index 000000000000..450b406c6f27 --- /dev/null +++ b/rust/helpers/drm.c @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include + +#ifdef CONFIG_DRM + +void rust_helper_drm_gem_object_get(struct drm_gem_object *obj) +{ + drm_gem_object_get(obj); +} + +void rust_helper_drm_gem_object_put(struct drm_gem_object *obj) +{ + drm_gem_object_put(obj); +} + +__u64 rust_helper_drm_vma_node_offset_addr(struct drm_vma_offset_node *node) +{ + return drm_vma_node_offset_addr(node); +} + +#endif -- cgit