[PATCH 6/9] drm/tyr: add BO creation and lookup helpers

[Ke Sun via B4 Relay <devnull+sunke.kylinos.cn@kernel.org>]

From: Alvin Sun <alvin.sun@linux.dev>

Add the new_object() and lookup_handle() helpers.

Signed-off-by: Alvin Sun <alvin.sun@linux.dev>
---
 drivers/gpu/drm/tyr/gem.rs | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tyr/gem.rs b/drivers/gpu/drm/tyr/gem.rs
index 3bf3787f5c3fd..be1affe80db1a 100644
--- a/drivers/gpu/drm/tyr/gem.rs
+++ b/drivers/gpu/drm/tyr/gem.rs
@@ -9,9 +9,11 @@
 use kernel::{
     drm::gem::{
         self,
-        shmem, //
+        shmem,
+        BaseObject, //
     },
     prelude::*,
+    sizes::SZ_4K,
     sync::{
         aref::ARef,
         Arc, //
@@ -23,6 +25,7 @@
         TyrDrmDevice,
         TyrDrmDriver, //
     },
+    file::TyrDrmFile,
     vm::{
         Vm,
         VmMapFlags, //
@@ -53,6 +56,30 @@ 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.
+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(SZ_4K).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.
+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