> On 28 Sep 2026, at 23:15, Ke Sun via B4 Relay
> <[email protected]> wrote:
>
> From: Alvin Sun <[email protected]>
>
> Add helpers for the BO ioctls: new_object() creates a GEM object with
> the size aligned up to PAGE_SIZE, and lookup_handle() resolves a handle
> for a DRM file.
>
> Signed-off-by: Alvin Sun <[email protected]>
> ---
> drivers/gpu/drm/tyr/gem.rs | 31 ++++++++++++++++++++++++++++++-
> 1 file changed, 30 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/tyr/gem.rs b/drivers/gpu/drm/tyr/gem.rs
> index 3bf3787f5c3fd..0e0989a48678f 100644
> --- a/drivers/gpu/drm/tyr/gem.rs
> +++ b/drivers/gpu/drm/tyr/gem.rs
> @@ -9,8 +9,10 @@
> use kernel::{
> drm::gem::{
> self,
> - shmem, //
> + shmem,
> + BaseObject, //
> },
> + page::PAGE_SIZE,
> prelude::*,
> sync::{
> aref::ARef,
> @@ -23,6 +25,7 @@
> TyrDrmDevice,
> TyrDrmDriver, //
> },
> + file::TyrDrmFile,
> vm::{
> Vm,
> VmMapFlags, //
> @@ -53,6 +56,32 @@ fn new(_dev: &TyrDrmDevice, _size: usize, args:
> BoCreateArgs) -> impl PinInit<Se
> /// Type alias for Tyr GEM buffer objects.
> pub(crate) type Bo = gem::shmem::Object<BoData>;
>
> +/// Create a new GEM buffer object.
> +#[expect(dead_code)]
> +pub(crate) fn new_object(ddev: &TyrDrmDevice, size: usize, flags: u32) ->
> Result<ARef<Bo>> {
> + if size == 0 {
> + return Err(EINVAL);
> + }
> +
> + let aligned_size =
> size.checked_next_multiple_of(PAGE_SIZE).ok_or(EINVAL)?;
> +
> + Bo::new(
> + ddev,
> + aligned_size,
> + shmem::ObjectConfig {
> + map_wc: true,
> + parent_resv_obj: None,
> + },
> + BoCreateArgs { flags },
> + )
> +}
> +
> +/// Look up a GEM object by handle for a DRM file.
> +#[expect(dead_code)]
> +pub(crate) fn lookup_handle(file: &TyrDrmFile, handle: u32) ->
> Result<ARef<Bo>> {
> + Bo::lookup_handle(file, handle)
> +}
> +
> /// Creates a dummy GEM object to serve as the root of a GPUVM.
> pub(crate) fn new_dummy_object(ddev: &TyrDrmDevice) -> Result<ARef<Bo>> {
> let bo = Bo::new(
>
> --
> 2.43.0
>
>
>
Reviewed-by: Daniel Almeida <[email protected]>
