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Commit 3c728d3a authored by Felix Kuehling's avatar Felix Kuehling Committed by Oded Gabbay
Browse files

drm/amdgpu: add amdgpu_sync_clone 



Cloning a sync object is useful for waiting for a sync object
without locking the original structure indefinitely, blocking
other threads.

Signed-off-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
Acked-by: default avatarOded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: default avatarOded Gabbay <oded.gabbay@gmail.com>
parent 155494db

drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c

+35 −0
Original line number Original line Diff line number Diff line
@@ -322,6 +322,41 @@ struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync, bool *explicit 
	return NULL;

	return NULL;

}

}





/**

 * amdgpu_sync_clone - clone a sync object

 *

 * @source: sync object to clone

 * @clone: pointer to destination sync object

 *

 * Adds references to all unsignaled fences in @source to @clone. Also

 * removes signaled fences from @source while at it.

 */

int amdgpu_sync_clone(struct amdgpu_sync *source, struct amdgpu_sync *clone)

{

	struct amdgpu_sync_entry *e;

	struct hlist_node *tmp;

	struct dma_fence *f;

	int i, r;



	hash_for_each_safe(source->fences, i, tmp, e, node) {

		f = e->fence;

		if (!dma_fence_is_signaled(f)) {

			r = amdgpu_sync_fence(NULL, clone, f, e->explicit);

			if (r)

				return r;

		} else {

			hash_del(&e->node);

			dma_fence_put(f);

			kmem_cache_free(amdgpu_sync_slab, e);

		}

	}



	dma_fence_put(clone->last_vm_update);

	clone->last_vm_update = dma_fence_get(source->last_vm_update);



	return 0;

}



int amdgpu_sync_wait(struct amdgpu_sync *sync, bool intr)

int amdgpu_sync_wait(struct amdgpu_sync *sync, bool intr)

{

{

	struct amdgpu_sync_entry *e;

	struct amdgpu_sync_entry *e;

drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -50,6 +50,7 @@ int amdgpu_sync_resv(struct amdgpu_device *adev, 
struct dma_fence *amdgpu_sync_peek_fence(struct amdgpu_sync *sync,

struct dma_fence *amdgpu_sync_peek_fence(struct amdgpu_sync *sync,

				     struct amdgpu_ring *ring);

				     struct amdgpu_ring *ring);

struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync, bool *explicit);

struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync, bool *explicit);

int amdgpu_sync_clone(struct amdgpu_sync *source, struct amdgpu_sync *clone);

int amdgpu_sync_wait(struct amdgpu_sync *sync, bool intr);

int amdgpu_sync_wait(struct amdgpu_sync *sync, bool intr);

void amdgpu_sync_free(struct amdgpu_sync *sync);

void amdgpu_sync_free(struct amdgpu_sync *sync);

int amdgpu_sync_init(void);

int amdgpu_sync_init(void);