drm/amdgpu: Add amdgpu_sync_wait
v2: Add intr option
Helper function useful for CPU update of VM page tables. Also useful if
kernel have to synchronously wait till VM page tables are updated.
Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
index ed814e6..a689918 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
@@ -298,6 +298,25 @@ struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync)
return NULL;
}
+int amdgpu_sync_wait(struct amdgpu_sync *sync, bool intr)
+{
+ struct amdgpu_sync_entry *e;
+ struct hlist_node *tmp;
+ int i, r;
+
+ hash_for_each_safe(sync->fences, i, tmp, e, node) {
+ r = dma_fence_wait(e->fence, intr);
+ if (r)
+ return r;
+
+ hash_del(&e->node);
+ dma_fence_put(e->fence);
+ kmem_cache_free(amdgpu_sync_slab, e);
+ }
+
+ return 0;
+}
+
/**
* amdgpu_sync_free - free the sync object
*