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Commit a6583af4 authored by Harish Kasiviswanathan's avatar Harish Kasiviswanathan Committed by Alex Deucher
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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: default avatarHarish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 9a4b7d4c

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

+19 −0
Original line number Diff line number Diff line
@@ -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

 *

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

+1 −0
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ int amdgpu_sync_resv(struct amdgpu_device *adev, 
struct dma_fence *amdgpu_sync_peek_fence(struct amdgpu_sync *sync,

				     struct amdgpu_ring *ring);

struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync);

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

void amdgpu_sync_free(struct amdgpu_sync *sync);

int amdgpu_sync_init(void);

void amdgpu_sync_fini(void);