Commit 89b4964c authored by Lyude Paul's avatar Lyude Paul Committed by Danilo Krummrich
Browse files

rust: drm: gem: Add raw_dma_resv() function 



For retrieving a pointer to the struct dma_resv for a given GEM object. We
also introduce it in a new trait, BaseObjectPrivate, which we automatically
implement for all gem objects and don't expose to users outside of the
crate.

Signed-off-by: default avatarLyude Paul <lyude@redhat.com>
Reviewed-by: default avatarJanne Grunau <j@jananu.net>
Tested-by: default avatarJanne Grunau <j@jannau.net>
Tested-by: default avatarDeborah Brouwer <deborah.brouwer@collabora.com>
Link: https://patch.msgid.link/20260316211646.650074-3-lyude@redhat.com


[ Fix incorrect reference in safety comment. - Danilo ]
Signed-off-by: default avatarDanilo Krummrich <dakr@kernel.org>
parent 9b836641

rust/kernel/drm/gem/mod.rs

+12 −0
Original line number Diff line number Diff line
@@ -215,6 +215,18 @@ fn create_mmap_offset(&self) -> Result<u64> { 


impl<T: IntoGEMObject> BaseObject for T {}



/// Crate-private base operations shared by all GEM object classes.

#[expect(unused)]

pub(crate) trait BaseObjectPrivate: IntoGEMObject {

    /// Return a pointer to this object's dma_resv.

    fn raw_dma_resv(&self) -> *mut bindings::dma_resv {

        // SAFETY: `self.as_raw()` always returns a valid pointer to the base DRM GEM object.

        unsafe { (*self.as_raw()).resv }

    }

}



impl<T: IntoGEMObject> BaseObjectPrivate for T {}



/// A base GEM object.

///

/// # Invariants