drm/amdgpu: cleanup the sync code
No need for two functions doing the same, remove one and
add comments what those functions actually do.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
index c15be00..87690cc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
@@ -50,6 +50,14 @@
sync->last_vm_update = NULL;
}
+/**
+ * amdgpu_sync_same_dev - test if fence belong to us
+ *
+ * @adev: amdgpu device to use for the test
+ * @f: fence to test
+ *
+ * Test if the fence was issued by us.
+ */
static bool amdgpu_sync_same_dev(struct amdgpu_device *adev, struct fence *f)
{
struct amdgpu_fence *a_fence = to_amdgpu_fence(f);
@@ -68,17 +76,33 @@
return false;
}
-static bool amdgpu_sync_test_owner(struct fence *f, void *owner)
+/**
+ * amdgpu_sync_get_owner - extract the owner of a fence
+ *
+ * @fence: fence get the owner from
+ *
+ * Extract who originally created the fence.
+ */
+static void *amdgpu_sync_get_owner(struct fence *f)
{
struct amdgpu_fence *a_fence = to_amdgpu_fence(f);
struct amd_sched_fence *s_fence = to_amd_sched_fence(f);
+
if (s_fence)
- return s_fence->owner == owner;
- if (a_fence)
- return a_fence->owner == owner;
- return false;
+ return s_fence->owner;
+ else if (a_fence)
+ return a_fence->owner;
+ return AMDGPU_FENCE_OWNER_UNDEFINED;
}
+/**
+ * amdgpu_sync_keep_later - Keep the later fence
+ *
+ * @keep: existing fence to test
+ * @fence: new fence
+ *
+ * Either keep the existing fence or the new one, depending which one is later.
+ */
static void amdgpu_sync_keep_later(struct fence **keep, struct fence *fence)
{
if (*keep && fence_is_later(*keep, fence))
@@ -104,7 +128,7 @@
return 0;
if (amdgpu_sync_same_dev(adev, f) &&
- amdgpu_sync_test_owner(f, AMDGPU_FENCE_OWNER_VM))
+ amdgpu_sync_get_owner(f) == AMDGPU_FENCE_OWNER_VM)
amdgpu_sync_keep_later(&sync->last_vm_update, f);
hash_for_each_possible(sync->fences, e, node, f->context) {
@@ -124,18 +148,6 @@
return 0;
}
-static void *amdgpu_sync_get_owner(struct fence *f)
-{
- struct amdgpu_fence *a_fence = to_amdgpu_fence(f);
- struct amd_sched_fence *s_fence = to_amd_sched_fence(f);
-
- if (s_fence)
- return s_fence->owner;
- else if (a_fence)
- return a_fence->owner;
- return AMDGPU_FENCE_OWNER_UNDEFINED;
-}
-
/**
* amdgpu_sync_resv - sync to a reservation object
*