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 at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c | 19 +++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h | 1 +
2 files changed, 20 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
index 5c8d302..e5b202e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
@@ -296,6 +296,25 @@ struct fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync)
return NULL;
}
+int amdgpu_sync_wait(struct amdgpu_sync *sync)
+{
+ struct amdgpu_sync_entry *e;
+ struct hlist_node *tmp;
+ int i, r;
+
+ hash_for_each_safe(sync->fences, i, tmp, e, node) {
+ r = fence_wait(e->fence, false);
+ if (r)
+ return r;
+
+ hash_del(&e->node);
+ fence_put(e->fence);
+ kmem_cache_free(amdgpu_sync_slab, e);
+ }
+
+ return 0;
+}
+
/**
* amdgpu_sync_free - free the sync object
*
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h
index 405f379..6c9c489 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h
@@ -49,6 +49,7 @@ int amdgpu_sync_resv(struct amdgpu_device *adev,
struct fence *amdgpu_sync_peek_fence(struct amdgpu_sync *sync,
struct amdgpu_ring *ring);
struct fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync);
+int amdgpu_sync_wait(struct amdgpu_sync *sync);
void amdgpu_sync_free(struct amdgpu_sync *sync);
int amdgpu_sync_init(void);
void amdgpu_sync_fini(void);
--
1.9.1
